Potential of different species for use in removal of DDT from the contaminated soil
Potential of different species for use in removal of DDT from the contaminated soil
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不同物种用于去除受污染土壤中滴滴涕的潜力
DOI：
10.1016/j.chemosphere.2008.04.082
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发表时间：
2008-08-01
期刊：
影响因子：
8.8
通讯作者：
Zhao, Yue-Chun
中科院分区：
文献类型：
--
作者：
Mo, Ce-Hui;Cai, Quan-Ying;Zhao, Yue-Chun
DDT及其主要代谢产物p，p'-DDD和p，p'-DDE（DDT包括DDT、DOD和DOE）在农业土壤中的检出率较高，尽管DDT在20世纪80年代或更早的时候就被禁止用于农业生产。在这项研究中，11种植物，包括8个玉米（玉米）品种和3种牧草（紫花苜蓿，黑麦草和大刍草）广泛种植在中国添加DDT的土壤中，以探讨其去除DDT污染土壤的潜力。这些植物积累和转移滴滴涕的能力差别很大。BCF：DDT浓度比（BCF：DDT浓度比）在0.014~0.25之间，TF：DDT浓度比（TF：DDT浓度比）在0.35~0.76之间。墨西哥）。DDT植物提取物的量从3.89 μ g（黑麦草）到27.0 μ g（大刍草）不等，占土壤中DDT初始加标总量的<0.1%。70 d后，有植物的土壤对初始DDTs的去除率达到47.1-70.3%，而无植物的土壤对初始DDTs的去除率仅为15.4%。DDTs的去除率在试验的前20 d较高，之后随着时间的延长，去除率逐渐降低。DDT植物提取量最高的是大刍草，其次是玉米。mexicana对DDTs的去除率最高，而玉米（Zea mays cv jinhai-6）对DDTs的去除率最高。尽管植物提取不是去除DDTs的主要途径，但植物物种尤其是金海玉米对DDTs的去除潜力很大。(c)2008爱思唯尔有限公司保留所有权利。
Dichlorodiphenyltrichloroethane (DDT) and its main metabolites, p,p'-DDD and p,p'-DDE (DDTs in the study included DDT, DOD and DOE), are frequently detected in agricultural soils even though its usage in agriculture was banned in 1980s or earlier. In this study, eleven plants including eight maize (Zea mays) cultivars and three forage species (alfalfa, ryegrass and teosinte) widely cultivated in China were grown in the soils spiked with DDTs to investigate their potential for removal of DDT from the contaminated soils. The plants varied largely in their ability to accumulate and translocate DDTs. with the bic concentration factor (BCF: DDT concentration ratio of the plant tissues to the soils) ranging from 0.014 to 0.25 and the translocation factor (TF: DDT concentration ratio of the shoots to the roots) varying from 0.35 (Zea mays cv Chaotian-23) to 0.76 (Zea mays spp. mexicana). The amount of DDT phytoextraction ranged from 3.89 mu g (ryegrass) to 27.0 mu g (teosinte) and accounted for < 0.1% of the total initial DDT spiked in the soils. After 70 d, the removal rates reached 47.1-70.3% of the total initial DDTs spiked in the soils with plants while that was only 15.4% in the soils without plant. Moreover, the higher removal rates of DDTs occurred at the first 20 d of experiment, and then the removal rate decreased with time. The highest amount of DDTs phytoextracted was observed in teosinte, followed by Zea mays spp. mexicana but the highest removal rate of DDTs was found in maize (Zea mays cv jinhai-6). Even though phytoextraction is not the main removal process for DDTs, the plant species especially Zea mays cv Jinhai- showed high potential for removing DDTs from the contaminated soils. (c) 2008 Elsevier Ltd. All rights reserved.