https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46449 Wed 23 Nov 2022 14:10:37 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52614 La-Euchar >goethite >HDPB-Z >HDPC-M. Birnessite exhibited great affinity for As and drastically reduced As extractability by more than 90% in all single extractions. The results revealed that HDPC-M, HDPB-Z, La-Euchar, birnessite, and goethite are promising immobilizing agents for in situ stabilization of As in terrestrial environments.]]> Wed 18 Oct 2023 13:47:13 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24419 Wed 10 Nov 2021 15:05:12 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:37009 Wed 05 Aug 2020 14:09:19 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49073 Wed 03 May 2023 16:07:56 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52545 Tue 17 Oct 2023 14:51:51 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35880 Tue 17 Dec 2019 17:03:41 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:44255 p < 0.05) between the two particle size fractions of < 2 mm and < 250 μm; (2) EC, CEC and total Pb were significantly correlated to Pb bioaccessibility (p < 0.05); and (3) soil analyses based on source of Pb demonstrated a strongly significant relationship between Pb bioaccessibility and soil properties (CEC, EC, clay content and total Pb) for mining soils from Broken Hill (r² = 0.86, p < 0.05, n = 18). These results demonstrated the influences of Pb contamination sources, soil properties and particle size fractions on Pb bioaccessibility as well as the prediction of Pb bioaccessibility using soil properties. The findings documented here will help in developing a predictive tool for human health risk assessment and the remediation of Pb contaminated soils.]]> Tue 11 Oct 2022 12:44:05 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42895 Tue 06 Sep 2022 14:39:21 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36013 Thu 20 Feb 2020 11:35:04 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52585 Thu 14 Mar 2024 09:00:29 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30285 Thu 09 Dec 2021 11:02:06 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:28139 −1). The objective was to understand how bioaccessible As by different methods was related to different As pools based on sequential extraction and 0.43 M HNO₃ extraction. Arsenic bioaccessibility was 7.6–25, 2.3–49, 7.3–44, and 1.3–38% in gastric phase (GP), and 5.7–53, 0.46–33, 2.3–42, and 0.86–43% in intestinal phase (IP) for UBM, SBRC, IVG, and PBET, respectively, with HNO₃-extractable As being 0.90–60%. Based on sequential extraction, As was primarily associated with amorphous (AF3; 17–79%) and crystallized Fe/Al oxides (CF4; 6.4–73%) while non-specifically sorbed (NS1), specifically sorbed (SS2), and residual fractions (RS5) were 0–10%, 3.4–20% and 3.2–25%. Significant correlation was found between As bioaccessibility by PBET and NS1 + SS2 (R² = 0.55 − 0.69), and UBM-GP and NS1 + SS2 + AF3 (R² = 0.58), indicating PBET mostly targeted As in NS1 + SS2 whereas UBM in NS1 + SS2 + AF3. HNO₃-extractable As was correlated to bioaccessible As by four methods (R² = 0.42 – 0.72) with SBRC-GP having the best correlation. The fact that different methods targeted different As fractions in soils suggested the importance of validation by animal test. Our data suggested that HNO₃ may have potential to determine bioaccessible As in soils.]]> Sat 24 Mar 2018 07:36:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30763 Sat 24 Mar 2018 07:24:26 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24816 in vivo measurement is reliable but resource insensitive, in vitro approaches promise to provide high-throughput RBA predictions. One challenge on using in vitro bioaccessibility (BAc) to predict in vivo RBA is how to minimize the heterogeneities associated with in vivo-in vitro correlations (IVIVCs) stemming from various biomarkers (kidney, blood, liver, urinary and femur), in vitro approaches and studies. In this study, 252 paired RBA-BAc data were retrieved from 9 publications, and then a Bayesian hierarchical model was implemented to address these random effects. A generic linear model (RBA (%) = (0.87 ± 0.16) × BAc + (4.70 ± 2.47)) of the IVIVCs was identified. While the differences of the IVIVCs among the in vitro approaches were significant, the differences among biomarkers were relatively small. The established IVIVCs were then applied to predict Pb RBA of which an overall Pb RBA estimation was 0.49 ± 0.25. In particular the RBA in the residential land was the highest (0.58 ± 0.19), followed by house dust (0.46 ± 0.20) and mining/smelting soils (0.45 ± 0.31). This is a new attempt to: firstly, use a meta-analysis to correlate Pb RBA and BAc; and secondly, estimate Pb RBA in relation to soil types.]]> Sat 24 Mar 2018 07:15:13 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36981 Mon 27 Jul 2020 10:07:42 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32295 Mon 21 May 2018 15:30:58 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42817 Mon 05 Sep 2022 11:14:24 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42224 Fri 19 Aug 2022 11:28:25 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46117 10,000 mg/kg. The comparison of Pb minerals prior to and after in vitro extractions demonstrated that the relatively soluble forms of Pb (PbSO4, PbO2 and MgO Pb) start to dissolve than other forms of Pb minerals, suggesting there was no difference in Pb2+ release between chemical-based (RBALP) and physiologically-based (UBM) models. The identification of the Pb minerals of Pb5(PO4)3Cl and organically-complexed Pb in mice excreta demonstrated that a portion of Pb2+ combined with food and humic acid to generate organically-complexed Pb in mice excreta, and that Pb5(PO4)3Cl is not bioavailable.]]> Fri 11 Nov 2022 14:46:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35882 Fri 10 Jan 2020 10:06:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44115 Fri 07 Oct 2022 14:19:31 AEDT ]]>