重金属高污染农田土壤EDTA淋洗条件初探

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	重金属高污染农田土壤EDTA淋洗条件初探
	杨冰凡 ; 胡鹏杰 ; 李柱 ; 陈励科 ; 吴龙华 ; 骆永明
刊名	土壤
	2013
卷号	45 期号:5 页码:928-932
关键词	农田土壤重金属 EDTA 淋洗
ISSN号	0253-9829
其他题名	Research on the Wash Condition Using EDTA for a Heavy Metal Severely Contaminated Agricultural Soil
通讯作者	胡鹏杰 E-mail:pjhu@issas.ac.cn
产权排序	中国科学院土壤环境与污染修复重点实验室(南京土壤研究所);中国科学院大学;中国科学院海岸带环境过程重点实验室(烟台海岸带研究所);
中文摘要	通过室内振荡淋洗试验研究了乙二胺四乙酸二钠(EDTA)浓度、淋洗时间、液固比、淋洗次数对甘肃省白银市某高污染农田土壤中重金属去除效果的影响,并测定了EDTA淋洗前后土壤中重金属形态的变化。结果表明:淋洗剂浓度和液固比越高、淋洗时间越长、淋洗次数越多,对重金属的去除效果越好。在EDTA浓度为5 mmol/L、液固比为2.5、连续振荡淋洗3次、每次1 h时,对土壤中Cd、Cu、Pb、Zn 4种重金属的总去除率分别为55.2%、21.9%、19.3%和20.9%,其中Cd淋洗效率最高。EDTA对土壤中交换态、碳酸盐结合态和铁锰氧化物结合态重金属的去除效果明显,但不能有效去除有机及硫化物态和残余态土壤...
英文摘要	Batch leaching experiments were conducted to examine the effects of different EDTA concentrations,washing duration,liquid/solid ratios and washing cycles on the removal of heavy metals in a contaminated agricultural soil from Baiyin City,Gansu Province,and the fractions of heavy metals in tested soils were determined before and after EDTA washing.The results showed that EDTA washing effect was much effective with high concentration and liquid/solid ratios,long washing duration and more washing cycles in general.Considering the feasibility on sites,a series of washing parameters were selected,it was 5 mmol/L of EDTA,liquid/solid ratio 2.5 and 3 times of successive washing cycles with 1 h for each.The removal rates of tested heavy metals under the selected condition were 55.2％ for Cd,21.9％ for Cu,19.3％ for Pb and 20.9％ for Zn,respectively.The results indicated that soil washing with EDTA was an efficient method to remove heavy metals from agricultural soil.Sequential fractionations of treated and untreated soil samples showed that EDTA was effective in removing the exchangeable,carbonate and oxide forms of Cd,Cu,Pb,and Zn,but ineffective for the organic and residual forms of test heavy metals.
学科主题	环境污染及其防治
收录类别	CSCD
资助信息	国家高技术研究发展计划(863)课题项目(2012AA06A204);; 国家自然科学基金项目(40930739)资助
语种	中文
CSCD记录号	CSCD:4976213
公开日期	2014-07-06
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/6823]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
推荐引用方式 GB/T 7714	杨冰凡,胡鹏杰,李柱,等. 重金属高污染农田土壤EDTA淋洗条件初探[J]. 土壤,2013,45(5):928-932.
APA	杨冰凡,胡鹏杰,李柱,陈励科,吴龙华,&骆永明.(2013).重金属高污染农田土壤EDTA淋洗条件初探.土壤,45(5),928-932.
MLA	杨冰凡,et al."重金属高污染农田土壤EDTA淋洗条件初探".土壤 45.5(2013):928-932.