Interaction effects of As, Cd and Pb on their respective bioaccessibility with time in co-contaminated soils assessed by the Unified BARGE Method

Xia, Qing, Lamb, Dane, Peng, Cheng and Ng, Jack C. (2016) Interaction effects of As, Cd and Pb on their respective bioaccessibility with time in co-contaminated soils assessed by the Unified BARGE Method. Environmental Science and Pollution Research, 24 6: 1-10. doi:10.1007/s11356-016-8292-7


Author Xia, Qing
Lamb, Dane
Peng, Cheng
Ng, Jack C.
Title Interaction effects of As, Cd and Pb on their respective bioaccessibility with time in co-contaminated soils assessed by the Unified BARGE Method
Journal name Environmental Science and Pollution Research   Check publisher's open access policy
ISSN 1614-7499
0944-1344
Publication date 2016-12-29
Sub-type Article (original research)
DOI 10.1007/s11356-016-8292-7
Open Access Status Not yet assessed
Volume 24
Issue 6
Start page 1
End page 10
Total pages 10
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Subject 2304 Environmental Chemistry
2310 Pollution
2307 Health, Toxicology and Mutagenesis
Abstract Interaction effects of As, Cd and Pb on their respective bioaccessibility in co-contaminated soils were reported. In addition, the influence of aging time (up to 90 days) on potential interactions was also investigated. Experiments were carried out by spiking four diverse soils with single, binary or ternary mixtures of As, Cd and Pb. Soils were measured for bioaccessibility at different aging periods. Results demonstrate that bioaccessibility of As, Cd and Pb reached a steady state after soils were aged for 30 days. Bioaccessibility of As, Cd and Pb in soils spiked with binary mixtures of As, Cd and Pb were not affected by the other co-existing metal/metalloid. But when As, Cd and Pb were introduced together to acidic soils which lacked abundant binding sites, intestinal bioaccessibility of Cd was increased at the early stage of aging (7 to 30 days) whilst bioaccessibility of As and Pb remained unchanged. However, when Pb and As were added after Cd has been incubated in soil for 7 days, Cd intestinal bioaccessibility was not influenced by As and Pb. Therefore, a number of factors should be taken into consideration when estimating the bioaccessibility of mixed As, Cd and Pb, including the loadings of As, Cd and Pb in soils, the time for which they have been aged together and the time period between As, Cd and Pb entering the soils.
Keyword Aging
Bioaccessibility
In vitro assessment
Metals/metalloids
Mixed contamination
Soils
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
National Research Centre for Environmental Toxicology Publications
 
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