https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34995 −1 biosolids for ≤50, 50–100, 100–250, 250–1000 μm size fractions, respectively. The Scanning Electron Microscope (SEM) images illustrated wrinkled and fractured surfaces due to degradation. The adsorption of dissolved organic matter onto microbeads was confirmed through FT-IR microscopy, while using Inductively Coupled Plasma Mass Spectrometer (ICP-MS) the presence of trace metals including Cd (2.34 ng g⁻¹), Cu (180.64 ng g⁻¹), Ni (12.69 ng g⁻¹), Pb (1.17 ng g⁻¹), Sb (14.43 ng g⁻¹), and Zn (178.03 ng g⁻¹) was revealed. Surface modified microbeads were capable of adsorbing Cu compared to the pure microbeads, which may be attributed to the complexation of Cu with dissolved organic matter associated with the microbeads in the matrix. It was further revealed that the biosolids derived microbead-metal complexes decreased soil respiration (up to ∼ 26%) and dehydrogenase activity (up to ∼ 39%). Hence, microbeads reaching biosolids during wastewater treatment are likely to serve as a vector for trace element contamination, transportation, and toxicity when biosolids are applied to soil.]]> Wed 29 May 2019 11:33:56 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41855 Mn>Pb>Cd>As. The results revealed that every vegetable contained the highest concentration of Zn range from 15 ± 1.4 to 50 ± 4.0 mg/kg fresh weight. Trace metals in vegetables exceeded the permissible level of FAO and WHO standard. The non-carcinogenic and carcinogenic risks were estimated on the basis of estimated daily intake (EDI), target hazard quotient (THQ), hazard index (HI) and target carcinogenic risks (TRs). The EDI values of all trace metals were below the maximum tolerable daily intake (MTDI). Total target hazard quotient (TTHQ) were greater than 1, indicated that if people consume these types of vegetables in their diet, they might pose risk to these metals. Finally, the total cancer risks (TRs) values were 6.4 × 10−3 for As and 8.7 × 10−5 for Pb which were greater than threshold value of USEPA (10−6), indicating that the consuming inhabitants of these vegetables are exposed to As and Pb with a lifetime cancer risk.]]> Wed 28 Feb 2024 15:20:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:12219 Wed 11 Apr 2018 12:29:02 AEST ]]> 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:34129 −1), mixed treatment with CM and HU under (d) iso-phosphorus and (e) iso-nitrogenous condition and (f) control. Monitoring of water quality and biological parameters revealed that total fish yield was the highest in CM (621.5 g tank⁻¹) followed by mixed treatments under iso-nitrogenous (428 g tank⁻¹) and iso-phosphorus (333 g tank⁻¹) conditions, aerated HU (321 g tank⁻¹) and HU (319 g tank⁻¹). The gross primary productivity (GPP) in HU was satisfactory (601.8 mg C m⁻² h⁻¹) and superior to all but CM treatment. The abundance of heterotrophic bacteria (HB) was highest in CM and lowest in HU. Both GPP and HB population were correlated positively with fish yield per tank. Although pH in all treatments remained high (pH 8.4–8.9), no ammonia toxicity was observed. No E. coli infestation in any fish muscle was encountered. The concentrations of cadmium and lead in fish muscle were within respective safe level. The study established that high fertilizer potential of HU could be exploited as an alternative organic fertilizer or as a candidate to be blended with cattle manure.]]> Tue 12 Feb 2019 13:19:05 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48849 Thu 20 Apr 2023 10:30:52 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38470 Mon 09 May 2022 16:19:51 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 ]]>