Effect of soil ageing on in vivo arsenic bioavailability in two dissimilar soils

被引：63

作者：

Juhasz, Albert L. ^{[1
]}

Smith, Euan ^{[1
]}

Weber, John ^{[1
]}

Naidu, Ravi ^{[1
]}

Rees, Matthew ^{[2
]}

Rofe, Allan ^{[2
]}

Kuchel, Tim ^{[2
]}

Sansom, Lloyd ^{[3
]}

机构：

[1] Univ S Australia, Ctr Environm Risk Assessment & Remediat, Div Informat Technol Engn & Environm, Mawson Lakes, SA 5095, Australia

[2] Inst Med & Vet Sci, Adelaide, SA 5000, Australia

[3] Univ S Australia, Sansom Inst, Sch Pharm & Med Sci, Div Hlth Sci, Adelaide, SA 5001, Australia

来源：

CHEMOSPHERE | 2008年 / 71卷 / 11期

基金：

澳大利亚研究理事会;

关键词：

arsenic; bioaccessibility; bioavailability; soil ageing; sequential fractionation;

D O I：

10.1016/j.chemosphere.2007.12.022

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Arsenic (As) bioavailability in spiked soils aged for up to 12 months was assessed using in vitro and in vivo methodologies. Ageing (natural attenuation) of spiked soils resulted in a decline in in vivo As bioavailability (swine assay) of over 75% in soil A (Red Ferrosol) but had no significant effect on in vivo As bioavailability even after 12 months of ageing in soil B (Brown Chromosol). Sequential fractionation, however, indicated that there was repartitioning of As within the soil fractions extracted during the time course investigated. In soil A, the As fraction associated with the more weakly bound soil fractions decreased while the residual fraction increased from 12% to 35%. In contrast, little repartitioning of As was observed in soil B indicating that natural attenuation may be only applicable for As in soils containing specific mineralogical properties. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2180 / 2186

页数：7

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