| 土壤腐殖酸对毒死蜱的吸附 |
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| 引用本文： | 魏沙平,李红陵,陈飞霞,魏世强.土壤腐殖酸对毒死蜱的吸附[J].环境科学学报,2007,27(10):1675-1680. |
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| 作者姓名： | 魏沙平 李红陵 陈飞霞 魏世强 |
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| 作者单位： | 1. 西南大学化学化工学院,重庆,400716
2. 西南大学资源环境学院,重庆市农业资源与环境研究重点实验室,重庆,400716 |
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| 摘 要： | 采用平衡振荡法进行农药毒死蜱在5种土壤腐殖酸上的吸附试验.结果表明,毒死蜱在不同土壤腐殖酸上的吸附行为表现出一定的差异,并均可Linear方程和Freundlich方程来描述;5种土壤腐殖酸对毒死蜱吸附能力都很强,吸附率均较高(平均值在72.57%～88.21%之间),大小顺序为:紫色潮土HA＞黄壤HA＞中性紫色土HA＞酸性紫色土HA＞腐殖土HA,此顺序与腐殖酸腐殖化程度一致;pH=2时,腐殖酸对毒死蜱的吸附能力显著增大;离子强度对毒死蜱的吸附影响不明显;腐殖酸添加量越大,单位质量的腐殖酸吸附量越小.
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| 关 键 词： | 毒死蜱 腐殖酸 吸附 土壤腐殖酸 毒死蜱 吸附量 humic acid chlorpyrifos 质量 单位 添加量 影响 离子强度 程度 腐殖化 腐殖土 酸性紫色土 中性紫色土 黄壤 紫色潮土 大小 平均值 吸附率 |
| 文章编号： | 0253-2468（2007）10-1675-06 |
| 收稿时间： | 2006/9/21 0:00:00 |
| 修稿时间： | 2006-09-21 |
Sorption of chlorpyrifos in humic acid |
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| WEI Shaping,LI Hongling,CHEN Feixia and WEI Shiqiang.Sorption of chlorpyrifos in humic acid[J].Acta Scientiae Circumstantiae,2007,27(10):1675-1680. |
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| Authors: | WEI Shaping LI Hongling CHEN Feixia and WEI Shiqiang |
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| Institution: | 1. College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400716; 2. College of Resource and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resource and Environment, Chongqing 400716 |
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| Abstract: | Sorption isotherms of the pesticide chlorpyrifos in humic acid(HA) isolated from 5 different kinds of soils were measured using a batch sorption method.The results showed the sorption isotherm of chlorpyrifos in HA fit both a linear equation and the Freundlich equation.The adsorption of chlorpyrifos by all HAs was strong,decreasing in the order neutral purple soil > yellow soil > purple alluvium> acid purple soil >humus soil.Sorption of chlorpyrifos by HA was influenced by many factors.The lower the pH,the larger the adsorptive capacity.However,ionic strength had a negligible effect.In addition,the sorption amount increased with the amount of added HA,but the sorption amount of unit HA decreased with the amount of added HA. |
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| Keywords: | chlorpyrifos humic acid sorption |
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