https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38044 2PO₄) (10 %, w/w) at 300 ℃, 500 ℃ and 700 ℃ to evaluate their potential lead [Pb(II)] adsorption. Effects of pH, contact time, and initial Pb(II) concentration on the Pb(II) adsorption capacity of the biochars were investigated. The physico-chemical, morphological, porous structure, crystallinity and spectroscopic characteristics of pre- and post-Pb-adsorbed biochars were analyzed to unravel the Pb(II) adsorption mechanism. Results showed that KH₂PO₄ reacted with biomass carbon to form stable C–P and/or C–O–P groups in BCP, and increased carbon retention and aromaticity of BCP. However, the addition of KH₂PO₄ led to an adverse effect on porous structure, e.g. surface area of biochars produced at 300 ℃, 500 ℃ and 700 ℃ were decreased by 41.53 %, 80.32 %, and 59.74 %, respectively. Adsorption experiments displayed that BCP produced at 300 ℃ exhibited the highest Pb(II) adsorption capacity (q_max = 154.7 mg g⁻¹), which was almost 6 times higher than the pristine biochar (q_max = 24.3 mg g⁻¹). Potassium polymetaphosphate [(KPO₃)_n] particles were attached on the surface of BCP, which facilitated the precipitation of Pb(II) to form [Pb(PO_3)2]n, Pb5(PO₄₎₃OH and PbHPO₄. This study thus demonstrated the effect of pyrolysis temperature on the enhancing removal capability of P-modified biochar for Pb(II) from aqueous solutions.]]> Wed 28 Jul 2021 15:18:58 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41817 Wed 24 May 2023 11:39:26 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52599 Wed 18 Oct 2023 13:02:56 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46172 –1, respectively), while the highest P was found in biosolid biochar (40.5 g kg^–1). The specific surface area of biochars ranged from 96.06–110.83 m2 g^–1. Hierarchical analyses of the chemical compositions of feedstocks and biochars enabled grouping of the materials respectively into four and five distinguished clusters. Three principal components (PC) explained 86.8% and 83.3% of the variances in the feedstocks and biochars, respectively. The PC1 represented the content of the major nutrients (N, P and K), whereas PC2 and PC3 represented other nutrients (secondary and micronutrients) contents and physicochemical properties (pH and EC). The results of this study suggested that biochars produced from different manures and biosolids may potentially be a source of soil nutrients and trace elements. In addition, different biochars may be applied to different nutrient-deficient soils to avoid plausible nutrient and potentially toxic element contamination.]]> Wed 07 Feb 2024 14:49:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33628 Tue 27 Nov 2018 16:39:30 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54357 Tue 20 Feb 2024 16:26:02 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40832 Tue 19 Jul 2022 10:47:22 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55303 Tue 14 May 2024 17:52:03 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34720 Tue 03 Sep 2019 18:26:39 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37723 2 and polyaromatics during lignite pyrolysis under pressurized entrained-flow conditions. The pyrolysis temperature and pressure ranged between 600-900 ℃ and 0.1-4.0 MPa, respectively, and were found to greatly influence the yield and composition of pyrolysis products. The results showed that the concentration of H₂ in the light gas fraction increased drastically with pyrolysis temperature and pressure, reaching 91.69 vol% at 900 ℃ and 4.0 MPa, which corresponded to H₂ generation of 0.27 m³/kg coal. The yield of polycyclic aromatic hydrocarbons (PAHs) such as naphthalene, biphenylene, fluorene, phenanthrene, pyrene, and fluoranthene was also promoted at elevated pyrolysis temperatures and pressures. The highest PAHs concentration of 90.4 area% in the pyrolysis oil was obtained at 900 ℃ and 4.0 MPa. It was also found that the changes in the hydrogen distribution under pressurized entrained-flow conditions mainly took place during the secondary pyrolysis reactions. It was postulated that hydrogen was formed via aromatization, condensation, aromatic ring growth mechanism, and direct cleavage reactions. The findings of this study showed that lignite could be efficiently converted to H2-rich gas, PAHs as chemical raw materials, and energy-dense lignite char via a novel poly-generation system based on pressurized entrained-flow pyrolysis.]]> Thu 25 Mar 2021 12:33:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:581 Thu 25 Jul 2013 09:10:29 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37748 Thu 08 Apr 2021 18:26:52 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:8024 Sat 24 Mar 2018 08:36:49 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:29430 W 259 Da) than those produced from pyrolysing the extracts (peak M_W 333–347 Da) and common species were identified in all volatile samples. The results were discussed in relation to the existence of oligomeric structures previously found in petroleum pitches.]]> Sat 24 Mar 2018 07:39:18 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3405 Sat 24 Mar 2018 07:21:36 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46994 Mon 29 Jan 2024 18:42:05 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:45517 (10)zeo₍₉₀₎, Co₍₁₀₎zeo₍₉₀₎, Fe₍₁₀₎zeo₍₉₀₎, Mg₍₁₀₎zeo₍₉₀₎, Mn₍₁₀₎zeo₍₉₀₎ and Zn₍₁₀₎zeo₍₉₀₎ were investigated in the hydrodeoxygenation (HDO) of oleic acid (OA) to produce renewable diesel. The La₍₁₀₎zeo₍₉₀₎ catalyst showed a conversion of OA up to 99 % with 83 % C₁₅ and C₁₇ selectivity after the reaction at 350 °C for 2 h under 4 MPa H₂ pressure. The superior activity of La₍₁₀₎zeo₍₉₀₎ was attributed to the synergistic interaction between La-Si-Al, a sufficient amount of weak + medium acid sites and excellent textural properties (large pore diameter). Larger pore diameter of La₍₁₀₎zeo₍₉₀₎ is highly desirable as it will generate greater diffusion of bulky molecules, thereby improving the accessibility of the reactant and hence excellent catalytic activity. The vacuum distillation was used to purify the crude liquid product (CLP), producing high-quality diesel fractions mainly comprising C₁₄, C₁₅, and C₁₇ fractions.]]> Mon 29 Jan 2024 18:39:08 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47359 Mon 29 Jan 2024 18:35:13 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53576 Mon 29 Jan 2024 18:20:35 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40287 Mon 29 Jan 2024 17:55:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47503 Mon 23 Jan 2023 12:08:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32549 Mon 18 Jun 2018 10:09:16 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50924 Fri 11 Aug 2023 15:46:43 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49137 Fri 05 May 2023 12:00:41 AEST ]]>