https://nova.newcastle.edu.au/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:37716 Bacillus sps., Streptomyces sps., Rhizomucor pusillus and Aspergillus flavus) fasten the decomposition time. This paper finds uniqueness in deriving 10 maturity parameters, 6 stability parameters with one parameter as confirmatory test of compost toxicity. It was concluded from the study that the Water Soluble Carbon (WSC) and Organic Nitrogen (Org. N) ratio is the key regulator of maturity parameter and the dehydrogenase (DHA) activity is important factor for compost stability.]]> Wed 31 Mar 2021 09:47:16 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43761 Quest cultivar, but the Fe concentration in rice tissues showed the reverse order. Fe plaque formations were promoted by Fe application, which was 7.8 and 10.4 times higher at 1 and 2 g kg-1 Fe applications compared to the control Fe treatment. The Quest cultivar exhibited 13% higher iron plaque formation capacity compared to the Langi cultivar in both soil types. These results indicate that enhanced iron plaque formation on the root surface was crucial to reduce the Cd concentration in rice plants, which could be an effective strategy to regulate grain Cd accumulation in rice plants.]]> Wed 28 Sep 2022 15:44:43 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50601 Wed 28 Feb 2024 16:38:18 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54508 Wed 28 Feb 2024 16:04:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50203 Wed 28 Feb 2024 16:02:09 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50533 Mn>Cu>Fe>Mo>Se>Co - and were within their maximum allowable limits. The average concentrations (mg kg−1) of toxic trace elements were as follows: As: 0.17, Cr: 0.18, Ni: 0.55 and Pb: 0.18, while 7% and 40% of the rice samples surpassed, respectively, the EU recommended limits of As and Pb. This study revealed that rice could be a primary exposure pathway of toxic elements, leading to either noncarcinogenic or carcinogenic health problems for daily rice consumers. The non-carcinogenic health risk was mainly associated with As which contributed 77% to the hazard index. The carcinogenic risk measured as incremental lifetime cancer risk (ILCR) was high (>10−4) with As, Cr and Ni, while Pb showed a moderate (<10−4) carcinogenic risk to adults. Rice can substantially be contaminated by trace elements other than As with potential human health risks. Consequently, regular monitoring of the marketed rice grain is demanded, backed up by viable mitigation strategies for reducing toxic elements uptake by rice grains.]]> Wed 28 Feb 2024 15:54:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:51944 MTC) was considered as the dependent variable; bioavailable As (BAs), total As (TAs), pH, organic carbon (OC), available phosphorus (AvP), and available iron (AvFe) were the predictor variables. LR performed better than RF and GBM in terms of accuracy, sensitivity, specificity, kappa, precision, log loss, F1score, and MCC. From the better-performing LR model, bioavailable As (BAs), TAs, AvFe, and OC were significant variables for grain As. From the partial dependence plots (PDP) and individual conditional expectation (ICE) of the LR model, 5.70 mg kg−1 was estimated to be the limit for BAs in soil.]]> Wed 28 Feb 2024 15:34:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45551 Wed 28 Feb 2024 14:47:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:53428 Wed 28 Feb 2024 14:45:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43947 Wed 28 Feb 2024 14:45:19 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52746 Spirulina platensis under different environmental condition (including salinity) has not yet been investigated. Hence, this study aims to examine the phycoremediation capacity of Pb by S. platensis at different levels of salinity. S. platensis was exposed to Pb (4 mg/L) at different levels of salinity (up to 30 ppt) for 12 days. The results indicated that salinity fluctuation was able to reduce phycoremediation capacity of Pb. The highest removal efficiency of Pb was observed in optimum salinity and decreased significantly both in lower and higher salinity treatments. Physiological disturbances in S. platensis were indicated by changes in functional groups and morphology. The morphology of Spirulina platensis both in lower and higher salinity treatments appeared to have changed its shape, resembling a disjointed thread with fading color.]]> Wed 25 Oct 2023 14:58:33 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43514 Wed 21 Sep 2022 11:18:21 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43505 Wed 21 Sep 2022 10:29:26 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54878 70%) even after 10 successive adsorption-desorption cycles. Thermodynamic evaluations revealed that the adsorption process was spontaneous, endothermic, and physically driven. The nanocomposites exhibited an outstanding selective adsorption behaviour towards MB from the mixture containing MB/RhB and MB/MO with separation efficiency of 99.10% and 77.34% for CaO-ES@GO, and 61.23% and 47.81% for CaO-FB@GO respectively. The particulate interaction mechanisms within the nanocomposites primarily involved π-π interaction, hydrogen bonding, pore-filling, and electrostatic attraction. The cost analysis revealed that the developed nanocomposites are more economical for treating MB in a large-scale application. Based on the statistical analysis using response surface methodology (RSM), the contributing effects of temperature and adsorbent dosage, as well as the single effect of pH, had the most significant impact on MB removal. The nanocomposites demonstrate a promising potential for sustainable MB treatment.]]> Wed 20 Mar 2024 13:10:41 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:48921 Wed 19 Apr 2023 15:56:22 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52603 Wed 18 Oct 2023 13:37:49 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:49448 Wed 17 May 2023 14:17:06 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43201 Delonix regia) activated carbon (FPAC). The developed ZnONPs loaded on the surface flamboyant pods activated carbon (ZnONPs-FPAC) was used successfully to remove of methylene blue (MB) from aqueous solution. The developed FPAC, ZnONPs and ZnONPs-FPAC were characterized UV–Vis spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), Transmission electron microscope (TEM) and Brunauer-Emmett-Teller (BET) techniques. The antibacterial activity of the synthesized FPAC, ZnONPs and ZnONPs-FPAC were screened and the results revealed that ZnONPs has an excellent antibacterial activity when compared. Batch adsorption studies were conducted to investigate the influence of process parameters such as initial concentration, contact time, pH, adsorbent dosage and temperature on MB uptake. The high BET surface area of 794.48 m²/g and mesoporous ZnONPS-FPAC developed gave good adsorption capacity of 186 mg/g. Equilibrium adsorption data of MB were modelled using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D–R) isotherm model. The adsorption of MB onto ZnONPs-FPAC was best described by Freundlich model indicating surface heterogeneity, and pseudo-second-order kinetics according to %∆q_e (normalized standard deviation), SSE (sum of square error), and R² (coefficient of determination) values. The results of the thermodynamic suggest that the adsorption process of MB onto ZnONPs-FPAC is endotherm, favourable, spontaneous, and physical. In nature. The reusability of ZnONPs-FPAC was examined upto five cycles with no significant loss in removal efficiency. The mean free energy (E), and Enthalpy (∆H) values calculated, suggested that the adsorption mechanism of MB on ZnONPs-FPAC is dominated by physical adsorption.]]> Wed 14 Sep 2022 10:06:37 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47139 Wed 14 Dec 2022 15:20:30 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50259 Wed 12 Jul 2023 10:41:19 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:40286 1) and lower for Pb and As (root BCFs <1). Substantial barriers for translocation from roots to stems were identified for all metal(loid)s (stem TFs; 0.07-0.68). Conversely, unrestricted flow from stems to leaves was observed for all metal(loid)s at unity or higher (leaf TFs = 1). Strong linear relationships between sediment and root for Zn and Pb were observed, indicating roots as a useful bioindicator.]]> Wed 07 Jun 2023 11:49:24 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39440 Wed 07 Jun 2023 10:32:24 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45303 Wed 07 Feb 2024 16:38:04 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39746  Fe (73.6) > Zn (67.8) > Mn (29.9) > Cu (5.7) > Mo (3.7) > Cd (2.8) > Se (2.3) > V (1.9) > Co = As (1.8) > Sb (1.2) > Pb (0.6). TEs displayed high variations within samples, reflecting many sources that control their concentrations in the coastal water. Most TEs displayed elevated concentrations in the east and west of the study area. The Na-Cl water type in the majority of investigated sites indicates excess alkaline elements and strong acid anions relative to alkaline earth cations and weak acid anions. Considering the saturation states of minerals, carbonate and evaporite minerals are oversaturated and unsaturated in surface water, respectively. Compositional interrelations between aqueous species showed that reverse cation exchange may have occurred. The excess SO42− content, derived from irrigation return flow and domestic greywater, probably plays a crucial role in the mobilization and transport of Zn and Pb by binding to sulfate ligands and forming aqueous complexes. Ecological risk assessment of TEs revealed that water in the majority of sites is safe in terms of As, Se, Pb, and Cd content, and unsuitable with respect to Zn and Cu. Acute and chronic toxicities of Cu and Zn are reported in several sites, thus coastal water cannot be used for fishery and protecting “nature reserve” purposes. However, industrial activity and tourism are safe to be conducted in most coastal water sites.]]> Wed 07 Feb 2024 15:26:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45418 Wed 07 Feb 2024 15:21:21 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:48970 Wed 07 Feb 2024 14:54:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52702 Wed 07 Feb 2024 14:37:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47041 Wed 07 Feb 2024 14:34:42 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43932 Wed 05 Oct 2022 12:44:44 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39208 1). Further, there is significant translocation from roots to shoot for Cu, Zn and Cd (≤ 1), however, Pb is less mobile (TF = 0.65). Patterns of accumulation were similar among families, except greater Cd accumulation to roots in members of Juncaceae. Patterns of uptake to roots and translocation to leaves were broadly similar among plant type, plant form, habitat and photosynthetic mode. Zinc is lower in the leaves of salt-secreting species for some closely related taxa, suggesting some species co-excrete sodium (Na⁺) and Zn²⁺ through glands in leaf tissue. Salinity tolerance has no relationship to metal uptake and translocation. Translocation of Zn is greater at lower Zn sediment exposures, reflecting its active uptake and essentiality, but such bias does not affect outcomes of analyses when included as a covariate.]]> Wed 03 May 2023 14:02:01 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:55891 40 NTU) due to POME contamination significantly decreased total released egg but did not have significant impact on relative weight of released eggs and nest area. Decreased total released eggs was occurred due to several alterations in the reproductive behaviour of siamese fighting fish during both the premating and mating stages. Duration of premating and mating stage was significantly decreased at turbidity level of 60 NTU. During premating stage, the number and average time of fin spreads behaviour at turbidity level of 60 NTU were significantly increased. In addition to, the number of chasing behaviour was significantly decreased with increasing turbidity levels. Furthermore, several alterations in reproductive behavior was also observed in mating stage, including increasing number and average time of lead, copulation interval, number of tail beat, average time of lead, and average time of circlings, followed by decreasing number of leads and number of circlings. In addition to, number of copulation and eggs per copulation showed an increasing and decreasing pattern at turbidity level of 40 and 60 NTU, respectively. The study suggests that reproductive behavior of fish might consider as alternative approach to support POME remediation management, mainly for turbidity parameters.]]> Wed 03 Jul 2024 14:59:32 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39295 1) and carcinogenic risks (CR > 1.0 × 10−4) increased with increasing Cd levels in the soil. The application of Fe decreased the human health risks from rice consumption which is more pronounced in Fe 2.0 than in Fe1.0 treatments. The rice cultivar grown in soil-1 (pH 4.6) showed the highest health risks as compared to soil-2 (pH 6.6) and the Quest cultivar had lower health risks than the Langi cultivar.]]> Tue 31 Oct 2023 11:13:06 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:51618 Tue 31 Oct 2023 10:38:14 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50383 Tue 31 Oct 2023 08:53:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54047 10 μg/L was much greater in the regions between two major rivers than in the regions close to the Ganges River on the eastern border of the study area, where higher proportions of As concentrations >10 μg/L had been observed prior to 2005. The greater likelihood that toxic concentrations of As are present away from the river channel and is found instead in the interfluvial regions could be attributed to the transport and flushing of aquifer As from intense irrigation pumping. We estimated that about 2.8 million people could be chronically exposed to As concentrations >10 μg/L. This high population-level exposure to elevated As concentrations could be reduced through targeted well-testing campaigns, promoting well-switching, provisions for safe water access, and developing plans for raising public awareness. Policymakers could use the ternary hazard map presented here to target high-risk localities for priority implementation of piped water supply strategies to help reduce human suffering.]]> Tue 30 Jan 2024 13:50:01 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:46968 Tue 30 Apr 2024 09:39:02 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:51254 Tue 29 Aug 2023 10:47:01 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54553 Tue 27 Feb 2024 20:46:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54463 Tue 27 Feb 2024 13:56:43 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:55369 Tue 21 May 2024 09:42:30 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52564 1 has been observed for all age groups from the exposed area and adult male group from the control area. Adults and children from rural area showed that ingestion rate (IR) and concentration are the respective influencing factors towards cooked rice As, whereas IR is solely responsible for all age groups from urban area. A vital suggestion is to reduce the IR of cooked rice for control population to avoid the As-induced health risks. The average intake (μg/day) of micronutrients is in the order of Zn > Se for all the studied populations and Se intake is lower for the exposed population (53.9) compared to the apparently control (140) and control (208) populations. Benefit-risk assessment supported that the Se-rich values in cooked rice are effective in avoiding the toxic effect and potential risk from the associated metal (As).]]> Tue 17 Oct 2023 15:41:25 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:46340 −1 (Bangladesh drinking water standard) during pre-monsoon, while 11 samples out of 20 were unable to remove As below the WHO provisional guideline value of 10 µg L⁻¹. During post-monsoon, none of the samples exceeded 50 µg L−1, but eight of them exceeded 10 µg L⁻¹. The Fe removal efficiencies of AIRPs were evident in more than 80% samples. Although As removal efficiency was found to be substantial, a cancer risk assessment indicates that hazard quotient (HQ) and carcinogenic risk (CR) of As in treated water for adults and children are above the threshold limits. Thus, additional reductions of As concentrations in treated water are needed to further reduce the excess cancer risk due to As in drinking water. Since 55% and 40% of the AIRPs were unable to remove As < 10 µg L⁻¹ during pre-monsoon and post-monsoon, further improvement including changes in AIRP design, regular cleaning of sludge, and periodic monitoring of water quality are suggested. Future research is needed to determine whether these modifications improve the performance of AIRPs.]]> Tue 15 Nov 2022 15:04:48 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47043 Tue 13 Dec 2022 14:22:30 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47037 CO32– > SO42– > Cl– > NO3–, although no significant inhibitory effects were observed with cations like Na+, K+, Mg2+, Ca2+, and Al3+. The positive correlation of AsV adsorption capacity with temperature demonstrated that the endothermic process and the negative value of Gibbs free energy increased (−14.95 to −12.47 kJ/mol) with increasing temperature (277 to 313 K), indicating spontaneous reactions. Desorption and regeneration showed that recycled Fe-chips, Fe-salt, and Zr–Fe-salt-coated biochars can be utilized for the effective removal of AsV up to six-repeated cycles.]]> Tue 13 Dec 2022 14:15:30 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47030 Tue 13 Dec 2022 14:08:40 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47026 Tue 13 Dec 2022 12:58:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47014 Tue 13 Dec 2022 11:48:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47004 Tue 13 Dec 2022 11:13:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:46989 Tue 13 Dec 2022 09:35:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39814 90% degradation of MO occurred by 120 ± 5.21, 75 ± 3.15 and 90 ± 3.61 min, respectively. Composites showed excellent catalytic reusability and environmental nontoxicity. Therefore, as effective and safe catalysts, they can shed light on exploring further usage in the environment and industrial set-ups.]]> Tue 09 Aug 2022 15:38:16 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39492 Ipomoea aquatica) has potential to improve the quality of POME. This present study investigated the phytoremediation efficiency of POME, which contains high amount of chemical oxygen demand (COD), nitrate, phosphate using water spinach for up to 15 days and described its impact on the growth performance. Experimental design of this study consisted of five treatments with three replications namely: control: 0% POME (0 L POME + 10 L tap water), Treatment A: 25% POME (2.5 L POME + 7.5 L tap water), Treatment B: 50% POME (5 L POME+ 5 L tap water), Treatment C: 75% POME (7.5 L POME + 2.5 L tap water), and Treatment D: 100% POME (10 L POME). The results indicated that water spinach was able to reduce COD, nitrate, phosphate and color as 86.3%, 21.5%, 90.9 % and 95.3%, respectively. Water spinach had no influence on the growth performance even up to 75% of POME containing media. Furthermore, results showed that high concentrations of POME damage root structures, and ultimately impact the growth performance of water spinach. In conclusion, phytoremediation using water spinach can be a potential remediation method to improve the quality of COD, phosphate and nitrate.]]> Tue 09 Aug 2022 14:33:54 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50598 Tue 07 Nov 2023 15:28:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43892 Tue 04 Oct 2022 13:59:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:43844 Tue 04 Oct 2022 11:53:44 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52134 Tue 03 Oct 2023 18:27:57 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52129 Thu 28 Sep 2023 15:10:56 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39841 Thu 28 Jul 2022 10:57:07 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:41174 Thu 28 Jul 2022 10:30:16 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45345 −1 for 24 h by Zr–FeBC and Fe-BC at pH 5 and 4, respectively. Desorption studies were performed to investigate the reusability, cost-effectiveness and stability of the adsorbents Zr–FeBC and Fe-BC. The adsorption–desorption study suggests that both examined biochars have considerable potentiality as adsorbent candidates in removing as well as recovery of P from wastewaters. Results also reveal that the regenerated Zr–FeBC and Fe–BC could be utilized repetitively in seven adsorption–desorption cycles using NaOH as a desorbing agent, which greatly reduces the P-removal cost from wastewaters. Thus, P enriched biochar could potentially be used as fertilizer in the agriculture sector.]]> Thu 27 Oct 2022 15:20:47 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45315 1) and carcinogenic risks (CR > 1.010–4) while AWD lowered health risks compared to CF. Thus, rice farming using AWD irrigation could be a viable and long-term solution for reducing As contamination in rice and associated human health hazards.]]> Thu 27 Oct 2022 13:56:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45232 Thu 27 Oct 2022 12:58:14 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:44826 Thu 27 Oct 2022 12:26:05 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45305 Thu 27 Oct 2022 10:29:16 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45333 water) along with total exposure (As_total) and hypertension risks in a study population in Bihar, India, we conducted an individual level cross-sectional analysis between 2017 and 2019 involving 150 participants. Arsenic intake variables and three indicators of hypertension risks (general hypertension, low-density lipoprotein (LDL) and high-density lipoprotein (HDL)) were derived, and any relationship was quantified using a series of crude and multivariable log-linear or logistic regression models. The prevalence of general hypertension was 40% for the studied population. The median level of HDL was 45 mg/dL while median value of LDL was 114 mg/dL. Apart from a marginally significant positive relationship between As intake from rice and the changes of LDL (p-value = 0.032), no significant positive association between As intake and hypertension risks could be ascertained. In fact, As_total was found to be associated with lower risks of general hypertension and higher levels of HDL (p-value = 0.020 and 0.010 respectively) whilst general hypertension was marginally associated with lower As_water (p-value = 0.043). Due to limitations regarding study design and residual confounding, all observed marginal associations should be treated with caution.]]> Thu 27 Oct 2022 09:13:21 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52785 2/g. EDX and XPS measurements confirmed the successful cross-linking of GO with DSAC. The adsorption experiments were well described by the Harkin-Jura model and they followed pseudo-second order kinetics. The maximum adsorption capacity reached 666.67 mg/g at 318 K. Thermodynamic evaluation indicated a spontaneous, feasible, and endothermic in nature. Regenerability and reusability investigations demonstrated that the GO@DSAC composite could be reused for up to 10 desorption-adsorption cycles with a removal efficiency of 81.78%. The selective adsorptive performance of GO@DSAC was examined in a binary system containing Rhodamine B (RhB) and methylene orange (MO). The results showed a separation efficiency (α) of 98.89% for MB/MO and 93.66% for MB/RhB mixtures, underscoring outstanding separation capabilities of the GO@DSAC composite. Overall, the GO@DSAC composite displayed promising potential for the effective removal of cationic dyes from wastewater.]]> Thu 26 Oct 2023 15:39:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:38614 Thu 25 Nov 2021 12:30:26 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:38889 Thu 24 Feb 2022 16:26:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54923 Thu 21 Mar 2024 13:41:11 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:48893 Thu 20 Apr 2023 09:06:50 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:38961 -1) in agricultural soils. The half maximum inhibitory concentration (IC₅₀) values were 4.21 ± 0.29 and 4.02 ± 0.95, respectively, whereas the maximum health risk index (HRI) was 3.85 ± 0.049 and 5.33 ± 0.271, respectively, for Mustang and Lancer. In other words, the malondialdehyde content increased significantly in Mustang (around five-fold) and Lancer (around four-fold) compared with the control treatment. Results revealed that Cd content was well above the acceptable limit (HRI >1) in the two cultivars when exposed to different levels of Cd stress. The tolerant cultivar (Mustang) has potential to chelate Cd in the nonedible parts of plants in variable fractions and can be used efficiently to improve growth and macro- and micro-nutrients content while reducing Cd concentration in plants in Cd-contaminated soil. It can also diminish the HRI, which may help to protect humans from Cd risks. The two cultivars' nutrient availability and sorption capacity significantly shape their survival and adaptability under Cd stress. Based on what is documented in the current study, we can conclude that Mustang is more tolerant and poses fewer health hazards to people than Lancer because of its capacity to maintain grain macro- and micro-nutrients under Cd stress.]]> Thu 17 Mar 2022 14:21:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39956 Thu 14 Jul 2022 08:38:51 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:46975 Thu 06 Jul 2023 15:23:14 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47285 Mon 30 Oct 2023 17:10:01 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39614 Mon 29 Jan 2024 18:47:47 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:38393 Mon 29 Jan 2024 18:44:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:38254 Mon 29 Jan 2024 18:38:46 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52777 Mon 29 Jan 2024 18:24:35 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52798 Mon 27 Nov 2023 10:38:31 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:44820 Mon 24 Oct 2022 09:38:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:47379 Mon 16 Jan 2023 13:46:54 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39730 Mon 13 May 2024 13:29:27 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:46969 Mon 12 Dec 2022 16:12:34 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:51570 Mon 11 Sep 2023 14:30:50 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54729 Mon 11 Mar 2024 14:11:20 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50227 Mon 10 Jul 2023 11:06:17 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:38485 Chrysichthys nigrodigitatus from Lagos Lagoon, southwest Nigeria to determine risks to ecological receptors and humans. Residual As was the predominant geochemical fraction (86.2%) in sediments. Arsenite [As (III)] concentrations which ranged from 0.06 to 0.53 mg kg^-1 in catfish muscle tissue, accounting for 25.9% of total As was the dominant species. Less toxic dimethylarsinic acid (DMA) which varied between 0.06 and 0.27 mg kg^-1 made up to 10.8% of total As in catfish muscle tissue. Estimated human average daily intake (ADI) of As as As (III) and DMA were 1.35 x 10^-4 and 0.62 x 10^-4 mg kg^-1 BW with corresponding hazard quotients (HQs) of 0.45 and 0.21, respectively, indicate no apparent health hazard to adult consumers. The incremental lifetime cancer risks (ILCR) of 0.78 x 10^-3 for total As, 0.20 x 10^-3 for As (III), and 0.93 x 10^-3 for DMA, for adults from the consumption of catfish is slightly higher than the US EPA threshold and indicates moderate carcinogenic risk. Furthermore, 12.5% bioavailable fraction of As in sediment and relatively higher levels of As (III) in fish tissues has ecological and public health implications.]]> Mon 09 May 2022 16:19:19 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:50761 Mon 07 Aug 2023 14:08:10 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52555 Mon 01 Jul 2024 15:42:07 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:45419 Fri 28 Oct 2022 12:02:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52800 1.5 mg L−1). Conducting health risk assessment shows that children and infants in the region are at a non-cancer risk (HQ > 1) due to sustained F− intake through drinking water. The spatial distribution of EWQI revealed medium-quality groundwater for drinking purposes in the south-central sub-area of Tundla. With reference to irrigation, groundwater sources are of better quality in the south sub-area.]]> Fri 27 Oct 2023 14:07:11 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:55384 Fri 24 May 2024 10:35:14 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:41088 Fri 22 Jul 2022 17:11:19 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54852 Fri 15 Mar 2024 17:15:42 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:54822 Fri 15 Mar 2024 08:36:58 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39997 n = 144) were collected from the markets of 16 districts of Bangladesh to determine the distribution, regional variability and associated health risk from Cd. The mean and median concentrations of Cd in rice were 44 μg/kg and 34 μg/kg, respectively, ranging between 1 and 180 μg/kg, dry weight. The Cd concentrations of the rice samples did not exceed the safe limit of EU/CODEX but 9% exceeded the safe limit of FSANZ (Food standards Australia New Zealand) values. Results indicated that there were significant variations of Cd among (33%) and within (67%) the districts. Some rice brands such as Najirshail, Katarivogh and Chinigura had Cd levels of 81, 70 and 68 μg/kg, respectively. Cadmium ingested on a daily basis ranged between 0.09 and 0.58 μg/kg body weight (bw) with the incremental lifetime cancer risk (ILCR) for individuals varying between 1.35 x 10⁻³ and 8.7 x 10⁻³ in different districts. The age groups (2–5 yrs) and (6–10 yrs) experienced higher risks than others and both males and females were found to be susceptible from Cd exposure of rice.]]> Fri 15 Jul 2022 10:11:38 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:44521 Sporobolus virginicus, across three urbanised estuaries in NSW Australia. Lake Macquarie was the most contaminated estuary, while Sydney Olympic Park, Port Jackson exhibited intermediate metal(loid) loadings and Hunter Wetlands exhibited the lowest loadings among estuaries. Essential metals (Zn and Cu) were more mobile, with sediment:root bioconcentration factors (BCFs) greater than unity and translocation among plant organs greater than, or equal to, unity. Other metal(loid)s were less mobile, with BCFs equal to unity and translocation factors among organs much reduced. Despite these barriers to translocation, all metal(loid)s were accumulated to roots with dose, and further accumulative relationships between metal(loid)s in roots and culms, and culms and leaves, were evidenced (with the exception of Cu). Along with sediment metal(loid)s, increases in sediment pH predicted Cu uptake in roots and increases in soil organic matter predicted Se uptake in roots. Although significant positive linear relationships were observed between sediment metal(loid)s and plant organ metal(loid)s(withholding Cu), the variance explained was low to intermediate for most metal(loid)s suggesting employing S. virginicus as an accumulative bioindicator would be impractical.]]> Fri 14 Oct 2022 11:18:58 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39491 4) at depth greater than 500 m from earth surface. The average mass concentration of PM₄ was extremely higher than recommended values. QXRD and FESEM-EDS analyses were applied to study the micro-mineralogy and micro-morphology of respirable dusts. The chemical analysis by ICP-MS revealed an enrichment of V, Cr, Cu, Zn, As, Ag, Cd and Sb in respirable dust compared with the background environment and world coals. The EPA’s health risk model showed that the health risk posed by Cr and Co in all workplaces exceeded the acceptable risk value for human health. The synthetic respiratory tract lining fluid (RTLF) model was utilized to achieve a novel insight into the toxicity of respirable coal dust. The result showed an overall depletion of lung surface antioxidants with the decreasing trend of ascorbic acid > reduced glutathione >> urate, implying low- to medium level of oxidative stress. The result of this study can be applied globally by decision-makers to decrease hazardous exposure of mine workers to respirable dust.]]> Fri 10 Jun 2022 14:04:34 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39009 Fri 08 Apr 2022 15:53:39 AEST ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:52999 Vigna radiata) in two contrast soil types (Dermosol and Tenosol). The soil types with added Zn and Cd exerted a significant effect on translocation and accumulation of metals in different tissues. The accumulation of Zn and Cd was higher for Tenosol than that for Dermosol. At control, the concentration of Cd followed a pattern, e.g., root > stem > petiole > pod > leaflet > grain for both soils. A basal Zn supply (5 mg kg^-1) increased the grain Zn concentration to a significant amount (up to 67%). It also reduced Cd accumulation in tissues, including grains (up to 34%). No non-carcinogenic effect was observed for either the children or the adults as the EDI and PTDI values were below the safety limit; however, the ILCR values exceeded the safety limit, indicating the possibility of some carcinogenic effects. Added Zn helped to reduce the carcinogenic and non-carcinogenic health risks on humans.]]> Fri 03 Nov 2023 16:05:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/manager/Repository/uon:39995 Fri 01 Jul 2022 13:49:31 AEST ]]>