化学淋洗技术修复重金属污染土壤的田间试验  

Field Experiment on Remediation of Heavy Metal Contaminated Soil by Chemical Leaching Technology

作　　者：马强 陈思涵[1] 吴启堂[2] 冯志刚 刘珊[1,3] 谢超 周冰洁[1] 张兰英 王勋[4] MA Qiang;CHEN Sihan;WU Qitang;FENG Zhigang;LIU Shan;XIE Chao;ZHOU Bingjie;ZHANG Lanying;WANG Xun(School of Resource Environment and Safety Engineering,University of South China,Hengyang,Hunan 421001,China;College of Natural Resources and Environment,South China Agricultural University,Guangzhou,Guangdong 510642,China;Hunan Key Laboratory of Rare Metal Minerals Exploitation and Geological Disposal of Wastes,University of South China,Hengyang,Hunan 421001,China;Nanjing Qingke Zhongsheng Environmental Technology Co. ,Ltd,Nanjing,Jiangsu 211106,China)

机构地区：[1]南华大学资源环境与安全工程学院,湖南衡阳421001 [2]华南农业大学资源环境学院,广东广州510642 [3]南华大学稀有金属矿产开发与废物地质处置技术湖南省重点实验室,湖南衡阳421001 [4]南京清科中晟环境技术有限公司,江苏南京211106

出　　处：《南华大学学报（自然科学版）》2020年第6期30-35,共6页Journal of University of South China：Science and Technology

基　　金：广东省科学技术厅研究项目(2018B030324003);广东特支计划本土创新创业团队项目(2019BT02L218);湖南省教育厅科学研究项目(19B491,19B497);衡阳市科技计划项目(2018KJ132);南华大学博士科研启动资金项目(190XQR115)。

摘　　要：采用野外大田试验,选择稻草秸秆厌氧发酵、稻草秸秆好氧发酵、氯化钾(KCl)和醋酸(HAc)对某地重金属污染农田进行化学淋洗,经过120 d的处理,试验结果表明:相比较原始土壤pH(4.78),4种淋洗剂对农田土壤pH影响均较小,KCl降低土壤pH的幅度最大(4.65),其次HAc(4.72),好氧发酵、厌氧发酵和空白pH值相近。比较4种淋洗剂对土壤中重金属(Cd、Pb、Cu和Zn)去除效果,KCl对土壤中重金属(Cd、Pb、Cu和Zn)去除效果最好其中,KCl对Cd的去除率是19.20%,对Pb的去除率是6.84%,对Cu的去除率是7.56%,对Zn的去除率是15.94%。HAc对土壤中重金属(Cd、Pb、Cu和Zn)去除效果不明显。The field experiment selected anaerobic fermentation of straw straw,aerobic fermentation of straw straw,KCl and HAc for the chemical leaching.After 120 days of treatment,the test results showed that:compared with the original soil pH(4.78),the four kinds of leaching agents had little effect on the farmland soil pH,KCl had the largest reduction in soil pH(4.65),followed by HAc(4.72),the pH of aerobic fermentation,anaerobic fermentation and CK were similar.Comparing the removal effects of 4 kinds of leaching agents on heavy metals(Cd,Pb,Cu and Zn)in soil,KCl had the best removal effect on heavy metals(Cd,Pb,Cu and Zn)in soil.Among them,the removal rate of KCl on Cd was 19.20%,the removal rate of Pb was 6.84%,the removal rate of Cu was 7.56%,and the removal rate of Zn was 15.94%.The effect of HAc on removing heavy metals(Cd,Pb,Cu and Zn)in soil was not obvious.

关 键 词：化学淋洗技术 重金属污染土壤 去除率 大田试验 

分 类 号：X53[环境科学与工程—环境工程]