Effects of arsenic and cadmium on bioaccessibility of lead in spiked soils assessed by Unified BARGE Method

Xia, Qing, Peng, Cheng, Lamb, Dane, Kader, Mohammed, Mallavarapu, Megharaj, Naidu, Ravi and Ng, Jack C. (2016) Effects of arsenic and cadmium on bioaccessibility of lead in spiked soils assessed by Unified BARGE Method. Chemosphere, 154 343-349. doi:10.1016/j.chemosphere.2016.03.133


Author Xia, Qing
Peng, Cheng
Lamb, Dane
Kader, Mohammed
Mallavarapu, Megharaj
Naidu, Ravi
Ng, Jack C.
Title Effects of arsenic and cadmium on bioaccessibility of lead in spiked soils assessed by Unified BARGE Method
Journal name Chemosphere   Check publisher's open access policy
ISSN 0045-6535
1879-1298
Publication date 2016-07
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.chemosphere.2016.03.133
Open Access Status Not Open Access
Volume 154
Start page 343
End page 349
Total pages 7
Place of publication Kidlington, Oxford United Kingdom
Publisher Pergamon Press
Collection year 2017
Language eng
Abstract The bioaccessibility of lead (Pb) in contaminated soils has been extensively studied, including the influence of soil properties on Pb bioaccessibility. However, little is known about the effects of other metals/metalloid, such as arsenic (As), cadmium (Cd) on the bioaccessibility of Pb, i.e. whether As or Cd could increase or decrease the solubility of Pb in human gastrointestinal tract when Pb-contaminated soil and As-contaminated (or Cd-contaminated) soil are ingested simultaneously. Furthermore, it is far from clear that if soil property could make a difference to these effects. In this study, seven types of soils were collected in Australia and spiked with As, Cd or Pb. Gastric bioaccessibility of Pb ranged from 44 ± 0.9% to 100 ± 6.7% whilst intestinal bioaccessibility dropped to 1 ± 0.2% to 36 ± 1.7%. Statistical analysis shows total Pb in soil was the most significant controller for bioaccessible Pb. Effects of As and Cd on the bioaccessibility of Pb in simulated human digestive system were studied by mixing As-spiked soil (or Cd-spiked soil) with Pb-spiked soil of the same type during bioaccessibility test. Results reveal that neither As nor Cd had impact on Pb bioaccessibility, which indicates when As, Cd and Pb aged in soils separately, they may behave independently in the bioaccessibility measuring system. This finding can be part of evidence to assume additive effect when it comes to estimate the bioaccessibility of mixtures of independently-aged As and Pb (or Cd and Pb) in soils.
Keyword Soil contamination
Metal/metalloid mixture
Bioavailability
In vitro assessment
Soil properties
Risk assessment
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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Created: Mon, 25 Apr 2016, 11:16:54 EST by Dr Cheng Peng on behalf of National Res Centre For Environmental Toxicology