菠萝皮浸提液对Pb污染土壤的淋洗效果
Removal Efficiency of Pb from Contaminated Soil by Water Extract of Ananas comosus Peel
权雪洁 1李雨心1
作者信息
- 1. 陕西师范大学旅游与环境学院,陕西西安710119
- 折叠
摘要
[目的]筛选一种安全、无毒的土壤重金属淋洗液.[方法]通过室内模拟试验,采用振荡淋洗法研究菠萝皮水浸提液对土壤中重金属Pb的淋洗效果,探讨淋洗时间、淋洗次数、液固比对Pb的淋洗效果的影响.[结果]随着淋洗时间的延长,菠萝皮对Pb的淋洗率逐渐增大,在4.0h时达到最大值;固液比对Pb的去除率影响很大,随着固液比的增大,淋洗率明显提高;适当增加淋洗次数,也能提高Pb的去除率.[结论]淋洗时间为4.0h,液固比为1∶30,淋洗3次时,菠萝皮对Pb的去除率最大可以达到57.5％.
Abstract
[Objective] To screen a safe and non-toxic soil heavy metal eluent.[Method] Laboratory simulation tests were conducted to exam the effects of washing reagents (Ananas comosus peel) in extracting the heavy metal Pb from contaminated soils.The effects of reaction time,washing time,soil liquid ratio on washing efficiency of Pb were investigated.[Result] The results showed that Pb removal efficiency significantly increased with increasing reaction time.The maximum value appeared in 4.0 h.The ratio of solid to liquid has a great influence on the removal rate of Pb.As the ratio of soild to liquid increasing,the removd rate increased obviously.Increasing the washing times appropriately can improve the washing efficiency.[Conclusion] The maximum removal efficiency for Pb was 57.5％,with the ratio of liquid to soild 1∶ 30,washing 3 times and reaction time of 4.0 h.
关键词
菠萝皮/重金属/淋洗/影响因素Key words
Ananas comosus peel/Heavy metal/Soil washing/Factor引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据