期刊
ENVIRONMENTAL POLLUTION
卷 177, 期 -, 页码 90-97出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2013.02.013
关键词
Soil lead; Soil arsenic; Bioavailability; Bioaccumulation; Orchard soils; Compost; Remediation; Sequential extraction
资金
- National Institute of Environmental Health Sciences [R21ES017921]
The availability of Pb and As in an historically contaminated orchard soil, after amendment with compost and aging in the field, was determined by single-step chemical extraction with 1.0 M ammonium acetate at pH 4.8, sequential extraction using the modified BCR test, and a redworm bioassay in the laboratory. The efficiency of soil Pb extraction by ammonium acetate was greater at higher total soil Pb but was reduced by compost amendment. Conversely, the extraction efficiency of total soil As increased with compost amendment, but was not sensitive to total soil As. The redworm bioassay indicated Pb (but not As) bioavailability to be reduced by soil amendment with compost, a result consistent with the ammonium acetate extraction test but not reflected in modified BCR test. Electron microprobe studies of the orchard soil revealed Pb and As to be spatially associated in discrete particles along with phosphorus and iron. (c) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据