https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54320 Wed 28 Feb 2024 15:14:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41068 2SO₄-H₂O₂ digested) was the dominant P fraction (37–51% of total P) in the aerobic soil under wheat, while it was decreased by 18–27% in flooded soil under rice cultivation. In contrast, the sparingly soluble Ca-bound P (HCl-Pi) increased from 25–31% under wheat cultivation to 41–50% under flooded rice (paddy) cultivation where reducing conditions are expected to prevail under submerged paddy soil conditions. The crop rotation not only altered the sparingly available P fraction but also influenced soil labile P, especially the organic P form. Compared with the rice soil, a 4-fold increase in the labile P fraction (NaHCO₃-Po) was observed in wheat soil. The moderately labile P fraction (NaOH-extractable) showed a similar trend to that of labile P pool, but the increased NaOH-Po in wheat soil was relatively small. The relatively rapid change in the residual P fraction was attributed to oxidation-reduction cycles of Fe oxides between flooded (rice) and aerobic (wheat) soil conditions. Conclusions: Wetting and drying cycles associated with a rice-wheat crop rotation promoted the transformation of the sparingly soluble soil P fraction between crops, which was attributed to changes in soil redox conditions, particularly Fe cycling. This indicated that the rice-wheat crop rotation can draw upon the sparingly soluble P fraction for crop production, thus relying less on fertilizer-applied P.]]> Wed 28 Feb 2024 14:57:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53481 Wed 28 Feb 2024 14:56:32 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34212 Wed 20 Feb 2019 10:05:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44657 Wed 19 Oct 2022 10:04:02 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47530 Wed 19 Apr 2023 08:49:34 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44361 Wed 12 Oct 2022 09:14:23 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37828 Wed 12 May 2021 10:00:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45846 Wed 11 Jan 2023 10:20:44 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53716 Wed 10 Jan 2024 11:17:44 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39613 Wed 10 Aug 2022 11:41:40 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39503 −1) and lead (Pb = 736.2 mg kg⁻¹). Soil properties, microbial activities, and the geochemical fractions and potential availabilities of As and Pb were determined in the non-treated (control) and biochar-treated soil. Modification of PB (pH = 10.6) and GWB (pH = 9.3) with Fe caused a decrease in their pH to 4.4 and 3.4, respectively. The application of PB and GWB significantly increased soil pH, while Fe-PB and Fe-GWB decreased soil pH, as compared to the control. Application of Fe-GWB and Fe-PB decreased the NH₄H₂PO₄-extractable As by 32.8 and 35.9%, which was more effective than addition of GWB and PB. However, PB and GWB were more effective than Fe-PB and Fe-GWB in Pb immobilization. Compared to the control, the DTPA-extractable Pb decreased by 20.6 and 21.7%, respectively, following PB and GWB application. Both biochars, particularly PB significantly increased the 16S rRNA bacterial gene copy numbers, indicating that biochar amendments enhanced the bacterial abundance, implying an alleviation of As and Pb bio-toxicity to soil bacteria. The results demonstrated that pristine pig carcass and green waste biochars were more effective in immobilizing Pb, while their Fe-engineered biochars were more effective in As immobilization in co-contaminated soils.]]> Wed 07 Feb 2024 16:39:44 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38910 Wed 07 Feb 2024 16:34:13 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46743 Wed 07 Feb 2024 14:57:34 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53312 Tue 21 Nov 2023 12:36:31 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38234 Tue 17 Aug 2021 08:42:53 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37264 Tue 15 Sep 2020 12:51:18 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47998 Tue 14 Feb 2023 16:22:00 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54256 Tue 13 Feb 2024 13:26:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45998 Tue 08 Nov 2022 16:11:02 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42904 Tue 06 Sep 2022 15:35:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32439 Tue 05 Jun 2018 14:58:23 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33595 Thu 22 Nov 2018 13:41:25 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32948 Thu 16 Aug 2018 13:28:52 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31331 Sat 24 Mar 2018 08:44:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43938 ion exchange (22.67%) > Cd2+-p interaction (3.88%), with negligible contributions from functional group complexation, electrostatic attraction and physical adsorption. The MBC could thus be used as a promising adsorbent for Cd2+ removal from aqueous solutions.]]> Mon 29 Jan 2024 18:49:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34743 2H₃O₂)₂), Pb₃(PO₄)₂, PbSiO₃, and PbCO₃. On phytoliths in CFB500, Pb²⁺ ions were mainly sorbed on the sites of silicate with a structure similar to PbSiO₃. The contribution of binding sites for Pb²⁺ sorption was ascribed to the outer-wall of carbon skeleton of CFB500, which was stronger than that provided by the mineral oxide aggregate and phytoliths on CFB500. Organic carbon functional groups, inorganic carbonates, silicates and phosphates on CFB500 mostly dominated the sorption sites for Pb²⁺. Our results suggest that CFB500 was a promising material for the remediation of Pb-contaminated aqueous environments (e.g., wastewater).]]> Mon 29 Jan 2024 17:59:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44905 Mon 24 Oct 2022 16:10:33 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44784 Mon 24 Oct 2022 09:17:48 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34857 Mon 20 May 2019 10:19:39 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35493 -1). The results showed that hydrothermal carbonization influences the physicochemical properties of the biosolids, such as promoting pore structure and trace elements below the threshold values for use in agriculture. The spectroscopic techniques demonstrated higher presence of oxygen-containing functional groups (e.g., C-O/O-H) on surfaces of Sewchar than that of biosolids. The Sewchar doses of 10 Mg ha^-1 and 60 Mg ha^-1 yielded the highest dry biomass for beans and rice respectively. Increasing Sewchar doses negatively correlated with radish dry biomass, as indicated by linear regression equation fitting (p < 0.05). Thus, biomass responses to Sewchar application into the soil varied with Sewchar dose and type of plant. For a proper environmental management, a survey was conducted to assess farmers' perception and acceptance of Sewchar as a soil amendment. The survey revealed that younger farmers who had higher education qualifications were more prone to use Sewchar as soil amendment. Additionally, farmers who would not use Sewchar as soil amendment attributed the highest level of importance to economic criteria, such as fertilizer and freight prices. In the future, studies on a longer term under field conditions should be performed to elucidate the interactions between Sewchar and soil properties on plant growth and to ensure the safe use of Sewchar as a soil amendment.]]> Mon 19 Aug 2019 10:05:27 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36467 Mon 11 Mar 2024 17:44:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37937 −1) derived from agricultural resources as a promising adsorbent precursor.]]> Mon 05 Jul 2021 15:48:44 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46864 Mon 05 Dec 2022 08:29:59 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47339 Fri 13 Jan 2023 12:16:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51495 Fri 08 Sep 2023 11:58:00 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44117 - 1 di-(2-ethylhexyl) phthalate (DEHP) amended with biochar derived from dead pigs, bamboo, and composted sheep manure. The soils were thereafter incubated for 112 days at 25^oC and periodically sampled for monitoring DEHP concentrations. Degradation of DEHP was described by a logistic model. Results showed that the initial degradation rates were slow, but accelerated after 14 days of incubation. The DEHP degradation rates were higher in the HOC soils than in the LOC soils over the incubation period. The half-lives of DEHP were shorter in the LOC soils treated with pig biochar, and bamboo/pig biochar plus compost than in the untreated soil. However, there was no significant difference in the half-lives of DEHP in the HOC control and treated soils. The differential effects of soil amendments on DEHP degradation between LOC and HOC soils could be explained by the properties of the organic amendments, soil pH and the organic carbon contents of the soils.]]> Fri 07 Oct 2022 14:19:32 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37316 Fri 02 Oct 2020 15:25:07 AEST ]]>