淋洗修复冷水江锡矿区的砷锑污染土壤

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英文篇名：Rehabilitation of Arsenic-antimony Contaminated Soil in Lengshuijiang Tin Mining Area by Leaching 作者：张静静 ; 周凤飒 ; 黄雷 ; 王月玲 ; 梁鹏 英文作者：ZHANG Jing-jing;ZHOU Feng-sa;HUANG Lei;WANG Yue-ling;LIANG Peng;Shenzhen Techand Ecology & Environment Company Limited; 关键词：土壤 ; 砷污染 ; 锑污染 ; 淋洗剂 英文关键词：Soil;;Arsenic pollution;;Antimony pollution;;Eluant 中文刊名：江西农业学报 英文刊名：Acta Agriculturae Jiangxi 机构：深圳市铁汉生态环境股份有限公司; 出版日期：2019-07-15 出版单位：江西农业学报 年：2019 期：07 基金：国家重点研发计划课题(2017YFD0801505) 语种：中文; 页：67-72 页数：6 CN：36-1124/S ISSN：1001-8581 分类号：X53

摘要

选取柠檬酸、草酸、KH_2PO_4溶液、NaOH溶液4种淋洗剂,对受砷锑污染的土壤进行单一及复合淋洗,研究了淋洗剂浓度、淋洗时间、固液比、淋洗次数以及复合淋洗剂添加顺序等对淋洗效果的影响。结果表明:同样浓度的淋洗剂,NaOH溶液对砷的去除效果最好,去除率最高可以达到58.22%;草酸溶液对锑的去除效果最好,去除率最高可以达到22.86%。淋洗时间为2 h,固液比为1∶10时,淋洗效果最好。复合淋洗中,酸碱淋洗剂交替淋洗,比同种溶液连续淋洗更能显著提高对砷的去除效果。
        Four kinds of leaching agents, citric acid, oxalic acid, KH_2PO_4 solution and NaOH solution, were selected to carry out single and compound leaching of arsenic-antimony contaminated soil. The effects of concentration of leaching agent, leaching time, solid-liquid ratio, times of leaching and adding sequence of compound leaching agent on the leaching were studied. The results showed that NaOH solution had the best removal efficiency of arsenic with the highest removal rate of 58.22% and oxalic acid solution had the best removal efficiency of antimony with the highest removal rate of 22.86%. When the elution time was 2 hours and the solid-liquid ratio was 1∶10, the elution effect was the best. In compound elution, the alternating elution with acid-base eluent can improve the removal of arsenic more significantly than continuous elution with the same solution.

引文

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