Relationship of bioaccessibility and fractionation of cadmium in long-term spiked soils for health risk assessment based on four in vitro gastrointestinal simulation models
文献类型：期刊论文
| 作者 | Shan, Baoqing; Tang, Wenzhong ; Xia, Qing; Ng, Jack C.
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2018-08-01 |
| 卷号 | 631-632页码:1582-1589 |
| ISSN号 | 0048-9697 |
| 关键词 | Soil contamination Bioavailability Bioaccessibility Heavy metal |
| 文献子类 | Article |
| 英文摘要 | The bioavailability and bioaccessibility of heavy metals mainly depend on their speciation in soils; however, the relationship between bioaccessibility and its speciation as determined as fractionation remains to be better characterized. Therefore, Cd fractionations in three types of long-term Cd-spiked soils were determined using a modified BCR method, and compared with Cd bioaccessibility data obtained from four in vitro gastrointestinal simulation assays induding the IVG, PBET, SBRC, and UBM. The results shows that the majority of Cd were found in the exchangeable/acid soluble (31) and reducible (B2) fractions (total percentage > 97%) after being spiked and aged for three years, indicating high Cd bioavailability; the bioaccessibility of Cd ranged from 57.7 +/- 1.8% to 99.3 +/- 2.8% in the gastric phase, and from 5.8 +/- 2.0% to 35.9 +/- 1.8% in the intestinal phase, respectively. Among the four assays, the strongest positive correlation was observed between Cd bioaccessibility based on the PBET assay and its B1 fraction in the spiked soils (r(2) gastric: 0.62 and intestinal: 0.52), suggesting that the PBET assay maybe more suitable for determining Cd bioaccessibility in aged contaminated soils. (C) 2018 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41174]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Shan, Baoqing,Tang, Wenzhong,Xia, Qing,et al. Relationship of bioaccessibility and fractionation of cadmium in long-term spiked soils for health risk assessment based on four in vitro gastrointestinal simulation models[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,631-632:1582-1589. |
| APA | Shan, Baoqing,Tang, Wenzhong,Xia, Qing,&Ng, Jack C..(2018).Relationship of bioaccessibility and fractionation of cadmium in long-term spiked soils for health risk assessment based on four in vitro gastrointestinal simulation models.SCIENCE OF THE TOTAL ENVIRONMENT,631-632,1582-1589. |
| MLA | Shan, Baoqing,et al."Relationship of bioaccessibility and fractionation of cadmium in long-term spiked soils for health risk assessment based on four in vitro gastrointestinal simulation models".SCIENCE OF THE TOTAL ENVIRONMENT 631-632(2018):1582-1589. |
入库方式： OAI收割
来源：生态环境研究中心
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