设为首页  |   加入收藏
郭晓方,卫泽斌,薛建华,张丽平,吴启堂.石灰水对混合试剂洗脱土壤重金属淋洗效果的影响[J].土壤,2017,49(1):129-134. GUO Xiaofang, WEI Zebin, XUE Jianhua, ZHANG Liping and WU Qitang.Effects of Lime Solution on Mixture of Chelators Extraction of Heavy Metals from Contaminated Soil[J].Soils,2017,49(1):129-134 本文二维码信息
二维码(扫一下试试看!)
石灰水对混合试剂洗脱土壤重金属淋洗效果的影响
Effects of Lime Solution on Mixture of Chelators Extraction of Heavy Metals from Contaminated Soil
投稿时间: 2016-03-28  最后修改时间: 2016-04-12
DOI:10.13758/j.cnki.tr.2017.01.019
中文关键词:  土壤淋洗  重金属  混合试剂(MC)  石灰水
Key Words:Soil leaching  Heavy metals  Mixture of chelators (MC)  Lime solution
基金项目:国家自然科学基金项目(41401584,41541012)、山西省青年科技研究基金项目(2014021035-2)和太原科技大学校青年科技研究基金项目(20133004)资助。
作者单位E-mail
郭晓方 太原科技大学环境与安全学院 xf-170@163.com 
卫泽斌 华南农业大学资源环境学院  
薛建华 北京航天长征飞行器研究所  
张丽平 太原科技大学环境与安全学院  
吴启堂 华南农业大学资源环境学院 wuqitang@scau.edu.cn 
摘要点击次数: 63
全文下载次数: 52
中文摘要:
      为了探索石灰水对混合试剂(MC)洗脱后土壤中重金属的淋洗效果,对重金属污染土壤进行了盆栽淋洗试验研究。结果表明:石灰水淋洗MC洗脱土壤,淋出液中Cd、Zn、Pb和Cu浓度均显著高于去离子水淋洗MC洗脱土壤,这主要由于石灰水提高土壤pH,释放土壤所吸附的络合态重金属,这种现象在酸性污染土壤中表现更明显。对于酸性污染土壤,可采用MC+石灰水+去离子水依次进行淋洗处理,其Cd和Zn去除率与MC+去离子水+去离子水依次淋洗处理相比提高22.6% 和28.8%;对于中性重金属污染土壤,两处理间重金属去除率差异不显著。石灰水淋洗可提高土壤重金属去除率,并提高土壤pH,改善MC洗脱对土壤的酸化,有利于淋洗后土壤的农业利用。
Abstract:
      A pot leaching experiment was carried out in order to study the effects of lime solution on mixture of chelators (MC) extraction of heavy metals from contaminated soil. The results showed that the concentrations of Cd, Zn, Pb and Cu in leachate were significantly increased with lime solution leaching MC-washed soil. The reason was that pH increase caused by lime solution decreased the adsorption of metal-ligand complex by the mineral surface, this phenomenon was more obvious in acid contaminated soil. Compared to the treatment with MC + deionized water + deionized water, the removal rates of Cd and Zn were increased by 22.6% and 28.8% respectively with leaching by MC + lime solution + deionized water in acid contaminated soil. However, the differences were not significant in neutral contaminated soil. This study suggests that soil leaching by lime solution can increase the removal rate of heavy metals and increase MC-washed soil pH, thus is in favor of the agricultural use of the washed-soil.
查看全文  查看/发表评论  下载PDF阅读器

您是第626458位访问者
版权所有 © 《土壤》编辑部
本系统由北京勤云科技发展有限公司设计   京ICP备09084417号
手机扫一扫看