Effect of bone char application on Pb bioavailability in a Pb-contaminated soil

文献类型: 外文期刊

第一作者: Chen, SB

作者: Chen, SB;Zhu, YG;Ma, YB;McKay, G

作者机构:

关键词: bone char amendment;bioavailability;Pb-contaminated soil;LEAD;IMMOBILIZATION;AMENDMENTS;PHOSPHORUS;EXTRACTION;ADDITIONS;SORPTION;CADMIUM;APATITE;METALS

期刊名称:ENVIRONMENTAL POLLUTION ( 影响因子:8.071; 五年影响因子:8.35 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: The effects of bone char (BC) application oil the bioavailability of Pb in a polluted soil from Hunan Province, China were examined. The Pb-contaminated soil was treated with two types of bone char, one from the UK and the other from China. The bioavailability of Pb was determined in terms of the uptake by Chinese cabbage (Brassica chinensis L.), sequential extraction and X-ray diffraction analysis. The results indicate that the Pb concentrations in both shoots and roots decreased with increasing quantities of added bone char, and the application of BC from the UK at the rate of 1.6% (w:w) had the largest effect. Lead Pb concentrations in the shoots and roots decreased by 56.0% and 75.9% respectively, whereas the application of BC from Zhejiang Province, China at the rate of 1.6% (w:w) reduced Pb concentrations in the shoots and roots to 2.04 mg kg(-1) and 8.42 mg kg-(1), respectively, only 45.8% and 30.2% compared to file control treatment. Sequential extraction results indicate that the addition of bone char, as a metal-immobilizing agent, substantially transforms soil Pb from non-residual fractions to the residual fraction. The transformation was further confirmed using X-ray diffraction studies. (c) 2005 Elsevier Ltd. All rights reserved.

分类号: X5

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