Effect of Dissolved Organic Matter on Chlorotoluron Sorption and Desorption in Soils

YANG Hong; WU Xin; ZHOU Li-Xiang; YANG Zhi-Min

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Effect of Dissolved Organic Matter on Chlorotoluron Sorption and Desorption in Soils

机译：溶解性有机物对土壤中氯脲吸附和解吸的影响

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A batch equilibrium techniques was used to examine the effect of dissolved organic matter (DOM) extracted from both non-treated sludge (NTS) and heat-expanded sludge (HES) on the sorption and desorption of chlorotoluron (3-(3-chloro-p-tolyl)-1,1-dimethylurea) in two types of soils, a yellow fluvo-aquic and a red soil from China. Without DOM,sorption of chlorotoluron was significantly greater (P ＜ 0.05) in the red soil than in the yellow fluvo-aquic soil. However,with DOM the effect was dependent on the soil type and nature of DOM. Chlorotoluron sorption was lower in the yellow fluvo-aquic soil than in the red soil, suggesting that with the same DOM levels the yellow fluvo-aquic soil had a lower sorption capacity for this herbicide. Application of DOM from both NTS and HES led to a general decrease in sorption to the soils and an increase in desorption from the soils. Desorption of chlorotoluron also significantly increased (P ＜ 0.05)with an increase in the DOM concentration. Additionally, for sorption and desorption, at each DOM treatment level the NTS treatments were significantly lower (P ＜ 0.05) than the HES treatments. This implied that non-treated sludge had a greater effect on the sorption and desorption of chlorotoluron than heat-expanded sludge.

机译：分批平衡技术用于检验从未处理污泥（NTS）和热膨胀污泥（HES）提取的溶解有机物（DOM）对氯甲苯（3-（3-chloro-对甲苯基）-1,1-二甲基脲在两种类型的土壤中，黄潮土和红色土壤。在没有DOM的情况下，红壤中氯甲苯的吸收显着大于黄潮土（P ＜0.05）。然而，使用DOM的效果取决于土壤类型和DOM的性质。黄色潮土土壤中氯丙酮的吸附量低于红色土层，表明在相同的DOM水平下，黄色潮土土壤对这种除草剂的吸附能力较低。来自NTS和HES的DOM的应用导致土壤对土壤的吸附普遍下降，而土壤的解吸增加。氯甲苯的解吸也随着DOM浓度的增加而显着增加（P ＜0.05）。此外，对于吸附和解吸，在每个DOM处理水平，NTS处理均显着低于HES处理（P ＜0.05）。这意味着未处理的污泥对氯甲苯的吸附和解吸的影响大于热膨胀污泥。

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来源
《土壤圈（英文版）》 |2005年第4期|432-439|共8页
作者
YANG Hong; WU Xin; ZHOU Li-Xiang; YANG Zhi-Min;
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作者单位

Department of Chemistry, College of Science, Nanjing Agricultural University, Nanjing 210095 China;

Department of Chemistry, College of Science, Nanjing Agricultural University, Nanjing 210095 China;

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095 China;

College of Life Science, Nanjing Agricultural University, Nanjing 210095 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类土壤学;
关键词
chlorotoluron; desorption; dissolved organic matter; sludge; sorption;

机译：氯甲苯脱附溶解有机物污泥吸附;

Effect of Dissolved Organic Matter on Chlorotoluron Sorption and Desorption in Soils

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