| 电动力学修复对沉积物理化性质的影响 |
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| 引用本文： | 李泰平,袁松虎,林莉,万金忠,徐懿,陆晓华.电动力学修复对沉积物理化性质的影响[J].环境科学与技术,2010,33(2). |
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| 作者姓名： | 李泰平 袁松虎 林莉 万金忠 徐懿 陆晓华 |
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| 作者单位： | 华中科技大学环境科学研究所,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金项目(20777024);;华中科技大学自然科学基金项目 |
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| 摘 要： | 以某化工厂排污沟渠中受六氯苯污染沉积物为对象,选用非离子表面活性剂OP-10为强化助剂,研究了电动力学修复后沉积物理化性质如pH、有机质含量、氧化还原电位、含水率和电导率变化情况。结果表明,电动力学处理13.5d后靠近阳极区域沉积物被酸化,而阴极区域被碱化;表面活性剂在沉积物上的吸附导致靠近阳极处有机质含量明显增加,其有机质含量最大增幅达到46%以上,而靠近阴极区域的有机质随电渗析流迁移使得其含量低于初始值;氧化还原电位与pH分布呈相反趋势;沉积物中含水率从阳极向阴极增大,靠近阴极处又降低;沉积物中大部分区域电导率值小于初始值。
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| 关 键 词： | 沉积物性质 电动力学:修复 |
Examining Changes of Physico-chemical Characteristics of Contaminated Sediment after Electrokinetic Remediation |
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| LI Tai-ping,YUAN Song-hu,LIN Li,WAN Jin-zhong,XU Yi,LU Xiao-hua.Examining Changes of Physico-chemical Characteristics of Contaminated Sediment after Electrokinetic Remediation[J].Environmental Science and Technology,2010,33(2). |
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| Authors: | LI Tai-ping YUAN Song-hu LIN Li WAN Jin-zhong XU Yi LU Xiao-hua |
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| Institution: | Environmental Science Research Institute;Huazhong University of Science and Technology;Wuhan;430074;China |
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| Abstract: | This paper presents a bench-scale electrokinetic setup used for lab examining of contaminated sediment remediation with respect to changes of pH value,organic content,redox potential,moisture and electrical conductivity of the sediments.Sediment,sampled from a chemical plant's effluent ditch,polluted mainly by hexachlorobenzene,was added with the nonionic surfactant OP-10 as an enhanced reagent.After the electro-kinetic remediation,it was found that the sediment was acidified adjacent to the anode and basif... |
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| Keywords: | sediment characteristics electrokinetics:remediation |
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