[1]冉文静,傅大放.黑麦草修复模拟重金属污染土壤的化学强化及其潜在风险[J].东南大学学报(自然科学版),2011,41(4):793-798.[doi:10.3969/j.issn.1001-0505.2011.04.026]
 Ran Wenjing,Fu Dafang.Effects and risk of chemical enhancement measures to phytoremediation using Lolium L. for artificially polluted soil with heavy metals[J].Journal of Southeast University (Natural Science Edition),2011,41(4):793-798.[doi:10.3969/j.issn.1001-0505.2011.04.026]
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黑麦草修复模拟重金属污染土壤的化学强化及其潜在风险()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第4期
页码:
793-798
栏目:
环境科学与工程
出版日期:
2011-07-20

文章信息/Info

Title:
Effects and risk of chemical enhancement measures to phytoremediation using Lolium L. for artificially polluted soil with heavy metals
作者:
冉文静傅大放
(东南大学土木工程学院,南京 210096)
Author(s):
Ran WenjingFu Dafang
(School of Civil Engineering, Southeast University, Nanjing 210096, China)
关键词:
重金属植物提取螯合剂表面活性剂
Keywords:
heavy metal phytoextraction chelating agent surfactant
分类号:
X5
DOI:
10.3969/j.issn.1001-0505.2011.04.026
摘要:
采用黑麦草(Lolium L.)修复模拟重金属污染土壤的盆栽试验,考察在分别投加螯合剂EDTA,Gallic和表面活性剂SDS,以及分别复合投加EDTA和SDS,Gallic和SDS等不同化学强化条件下植物修复效果; 并通过淋滤试验研究了使用化学强化措施的潜在风险.研究结果表明:在不同化学强化措施条件下,黑麦草对土壤中Cd,Pb,Zn提取效率大小顺序为Gallic和SDS,EDTA和SDS,Gallic,EDTA,SDS≈CK; 单独投加Gallic使首次淋滤液中Cd,Pb,Zn的浓度与对照组相比,分别增加15.4%,68.1%和100.4%,复合投加Gallic和SDS使首次淋滤液中Cd,Pb,Zn的浓度分别增加142.8%,72.0%和27.6%; 投加EDTA引起淋滤液中Cd,Pb,Zn浓度的增加远超过投加Gallic,并使TN,TP浓度增加,因此会有土壤中重金属淋失和营养元素流失风险; 复合投加Gallic和SDS可使黑麦草叶绿素a和b之比降低4%,根膜通透比上升了2.44%,不仅强化效果较好,而且风险小.
Abstract:
Pot tests of phytoremediation of soil polluted artificially with heavy metals were conducted to investigate the effects of the remediation using Lolium L. through chemical enhancement. Chelate EDTA, Gallic are surfactant SDS were used as chemical enhancement factors. The soil leaching tests were also carried out to observe the potential risk of chemical enhancement in this study. Results show that the order of enhanced phytoextraction of Cd, Pb and Zn by single or complex dosing chelating agents and surfactant was as follows: Gallic and SDS, EDTA and SDS, Gallic, EDTA, SDS≈CK. Compared with contrast group, single dosing Gallic increases the concentrations of Cd, Pb and Zn in the leaching liquor by 15. 4%, 68. 1% and 100. 4%, respectively. Complex dosing Gallic and SDS increases the concentrations by 142. 8%, 72. 0% and 27. 6% respectively. The concentrations of these metals in the liquor caused by dosing EDTA are much higher than those caused by dosing Gallic, and TN and TP in the liquor also reach higher levels so that there exists risk of leaching out heavy metals and nutrients from soil. Complex dosing Gallic and SDS can reduce chlorophyll a/chlorophyll b ration by 4% and increase the root membrane permeability by 2. 44%, which not only provide a higher efficiency of enhancement but also ensure less risk.

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备注/Memo

备注/Memo:
作者简介:冉文静(1983—),女,硕士生;傅大放(联系人),男,博士,教授,博士生导师,fdf@seu.edu.cn.
基金项目:江苏省环保科技基金重大资助项目(2005011).
引文格式: 冉文静,傅大放.黑麦草修复模拟重金属污染土壤的化学强化及其潜在风险[J].东南大学学报:自然科学版,2011,41(4):793-798.[doi:10.3969/j.issn.1001-0505.2011.04.026]
更新日期/Last Update: 2011-07-20