| 低浓度非离子表面活性剂对甲基对硫磷在沉积物上吸附行为的影响 |
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| 引用本文： | 杨成建,曾清如,杨海君,杨 波,唐中波.低浓度非离子表面活性剂对甲基对硫磷在沉积物上吸附行为的影响[J].中国生态农业学报,2007,15(4):105-108. |
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| 作者姓名： | 杨成建 曾清如 杨海君 杨 波 唐中波 |
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| 作者单位： | 湖南农业大学环境科学系,长沙,410128 |
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| 摘 要： | 用振荡平衡方法,研究了非离子表面活性剂Brij30、Tween-80在沉积物上的吸附行为及其对甲基对硫磷在两种沉积物上吸附的影响。结果表明,Brij30、Tween-80在两种沉积物上的吸附等温线均符合S型吸附方程;Brij30、Tween-80主要通过在沉积物矿物表面的吸附与积聚和在有机质中的分配而吸附。Brij30 Tween-80加入浓度低于CMC时,甲基对硫磷在沉积物的吸附量减少,这是Brij30、Tween-80分子与甲基对硫磷分子在沉积物表面争夺活性吸附点位的结果;Brij30、Tween-80加入浓度大于CMC时,表面活性剂在沉积物表面形成的表面胶束对甲基对硫磷的吸附作用及表面活性剂对沉积物胶体的分散作用,使甲基对硫磷在沉积物上的吸附增加。
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| 关 键 词： | 非离子表面活性剂 甲基对硫磷 吸附 沉积物 |
| 收稿时间： | 2005-11-28 |
| 修稿时间： | 2006-02-11 |
Effect of low concentration nonionic surfactants on adsorption behavior of parathion-methyl in sediments |
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| YANG Cheng-Jian,ZENG Qing-Ru,YANG Hai-Jun,YANG Bo and TANG Zhong-Bo.Effect of low concentration nonionic surfactants on adsorption behavior of parathion-methyl in sediments[J].Chinese Journal of Eco-Agriculture,2007,15(4):105-108. |
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| Authors: | YANG Cheng-Jian ZENG Qing-Ru YANG Hai-Jun YANG Bo and TANG Zhong-Bo |
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| Institution: | Department of Environmental Science, Hunan Agricultural University, Changsha 410128, China |
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| Abstract: | By using batch adsorption method,adsorption isotherms of two nonionic surfactants(Brij30,Tween-80)in two sediments were investigated and parathion-methyl adsorption behavior between the sediments and water with or without Brij30 or Tween-80 compared.Results show that the Smodel is appropriate for describing adsorption isotherms of Brij30 and Tween-80 in sediments.Adsorptions of Brij30 and Tween-80 are the results of their adherence or aggregation on sediment mineral matter and partitioning in sediment organic matter.When Brij30,Tween-80 concentrations are lower than CMC,parathion-methyl adsorption on sediments decreases as Brij30 and Tween-80 molecules compete against parathion-methyl molecules for adsorbent bit attainment.However,because Brij30 and Tween-80 surface micelle in the two sediments adsorbs parathion-methyl and surfactants disperse the sediment colloids,the adsorption of parathion-methyl to sediments increases as Brij30,Tween-80 concentrations are higher than CMC. |
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| Keywords: | Nonionic surfactant Parathion-methyl Adsorption Sediment |
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