Comparison of arsenic bioaccessibility in housedust and contaminated soils based on four in vitro assays.
作者： Hong-Bo Li , Jie Li , Ya-Guang Zhu , Albert L. Juhasz , Lena Q. Ma
DOI: 10.1016/J.SCITOTENV.2015.06.060
关键词:
摘要: Abstract Few studies have assessed As bioaccessibility in housedust using different vitro assays and compared to those contaminated soils. We determined 24 samples (4.48–38.2 mg kg−1) SBRC, IVG, DIN, PBET they averaged 73, 68, 53, 48% the gastric phase 26, 46, 55 43% intestinal of 4 assays. The corresponding 34 As-contaminated soils (22–6899 mg kg−1) were 34, 25, 22, 22% 18, 19, 21, 20% phase, which was 1.5–2.7 fold lower than possibly due differences contamination sources properties. Based on SBRC assay, 44–96% 2.3–80% Variation among similar for soils, with assay providing highest phase. In dissolved probably adsorbed onto precipitated iron oxides, causing a sharp decrease by assay. Unlike constituents (pepsin, mucin, phosphate, citrate) other 3 inhibited adsorption and/or enhanced dissolution, leading greater bioaccessibility. soil suggests potential health risk from exposure soil.
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