期刊文献+

摩擦清洗修复铅污染土壤的参数优化及清洗效率评价

Parameters Optimization and Cleaning Efficiency Evaluation of Attrition Scrubbing Remediation of Pb-Contaminated Soil
收藏 分享 导出
摘要 采用摩擦清洗法修复铅污染场地土壤,主要目的是将细颗粒和铅污染物从砂粒表面去除.通过正交实验优化清洗参数,并对3份不同铅含量土壤进行摩擦清洗实验.优化的清洗参数为:水土比70%干物质、温度25℃、搅拌时间30 min、搅拌速率1 200 r.mim-1.摩擦清洗前土壤经过筛分化验分析表明,3份土壤铅主要富集在砂粒和粉黏粒中;铅的分布与有机质有极大相关性.结果表明,经过摩擦清洗后,3份原状铅污染土壤砂粒的清洗效率分别为:67.61%、31.71%、41.01%,摩擦清洗从砂粒表面去除一部分细粒土壤和铅污染物,使铅浓缩至粉黏粒中;扫描电镜(SEM)分析表明,摩擦清洗后砂粒表面变光滑.以上结论说明摩擦清洗对于铅污染场地的砂粒土壤具有较好的清洗效果. Attrition scrubbing was used to remediate lead contaminated-site soil,and the main purpose was to remove fine particles and lead contaminants from the surface of sand.The optimal parameters of attrition scrubbing were determined by orthogonal experiment,and three soil samples with different lead concentration were subjected to attrition scrubbing experiments.The results showed that the optimal scrubbing parameters were: a solid ratio of 70% dry matter,a temperature of 25℃,an attrition time of 30 min,and an attrition speed of 1 200 r.min-1.Before attrition scrubbing,the screening and analysis of soil showed that in all three soil samples,lead was mainly enriched on sand and fine particles,and the distribution of lead was highly correlated to the organic matter.After attrition scrubbing,the washing efficiency of the original state lead contaminated sand soil in triplicates was 67.61%,31.71% and 41.01%,respectively,which indicates that attrition scrubbing can remove part of the fine soil and lead contaminants from the surface of sand,to accomplish the purpose of pollutants enrichment.Scanning electron microscopy(SEM) analysis showed that the sand surface became smooth after attrition scrubbing.The results above show that attrition scrubbing has a good washing effect for the remediation of lead contaminated sand soil.
作者 杨雯 黄锦楼 彭会清 李思拓 YANG Wen,HUANG Jin-lou,PENG Hui-qing,LI Si-tuo(1.School of Resources and Environment Engineering,Wuhan University of Technology,Wuhan 430070,China;2.Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
出处 《环境科学》 CAS CSCD 北大核心 2013年第9期3709-3715,共7页 Chinese Journal of Environmental Science
关键词 摩擦清洗 参数优化 R值 扫描电镜 attrition scrubbing parameter optimization lead R value scanning electron microscope
作者简介 杨雯(1989~),女,硕士研究生,主要研究方向为重金属污染土壤修复,E-mail:gwen19890601@163.com 通讯联系人,E-mail:jlhuang@rcees.ac.cn
  • 相关文献

参考文献25

  • 1李玉双,胡晓钧,宋雪英,孙铁珩,侯永侠.城市工业污染场地土壤修复技术研究进展[J].安徽农业科学,2012,40(10):6119-6122. 被引量:17
  • 2张英慧,袁东亚,赵志鹏,贺学.重金属铅污染对动植物的危害综述[J].安徽农学通报,2011,17(2):55-56. 被引量:14
  • 3Dermont G, Bergeron M, Mercier G, et al. Soil washing for metal removal: A review of physical/chemical technologies and field applications [ J ]. Journal of Hazardous Materials, 2008, 152(1): 1-31. 被引量:1
  • 4Mafino M A, Brica R M, Neale C N. Heavy metal soil remediation: The effects of attrition scrubbing on a wet gravity concentration process [ J ]. Environmental Progress, 1997, 16 (3) : 208-214. 被引量:1
  • 5Bayley R W, Biggs C A. Charaeterisation of an attrition scrubber for the removal of high molecular weight contaminants in sand [ J ]. Chemical Engineering Journal, 2005, 111 ( 1 ) : 71-79. 被引量:1
  • 6Feng D, Lorenzen L, Aldrich C, et al. Ex situ diesel contaminated soil washing with mechanical methods[J]. Minerals Engineering, 2001 , 14(9) : 93-11. 被引量:1
  • 7Straiar J, Seelj A. Attrition as a process of comminution and separation [ J ]. Powder Technology, 1999, 105 ( 1- 3 ) : 205- 209. 被引量:1
  • 8Thorvaldsen G S, Wakefield A W. The sand scrubber: effective environmental application of jet pumps [J]. Hydrotransport, 1999, 14 : 1-14. 被引量:1
  • 9J·利珀特,张兴仁,肖力子.土壤湿法清洗——第一家高效土壤擦洗厂[J].国外金属矿选矿,2007,44(8):42-44. 被引量:2
  • 10Gill A, Kaytaz Y, Onal G. Beneflciation of eolemanite tailings by attrition and flotation [ J ]. Minerals Engineering, 2006, 19 (4) : 368-369. 被引量:1

二级参考文献109

共引文献240

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈