Arid
DOI10.1016/j.ecoenv.2015.11.021
Electro-kinetic remediation coupled with phytoremediation to remove lead, arsenic and cesium from contaminated paddy soil
Mao, Xinyu1,2; Han, Fengxiang X.2; Shao, Xiaohou1; Guo, Kai2; McComb, Jacqueline2; Arslan, Zikri2; Zhang, Zhanyu1
通讯作者Mao, Xinyu ; Han, Fengxiang X.
来源期刊ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
ISSN0147-6513
EISSN1090-2414
出版年2016
卷号125页码:16-24
英文摘要

The objectives of this study were to investigate distribution and solubility of Pb, Cs and As in soils under electrokinetic field and examine the processes of coupled electrokinetic phytoremediation of polluted soils. The elevated bioavailability and bioaccumulation of Pb, As and Cs in paddy soil under an electrokinetic field (EKF) were studied. The results show that the EKF treatment is effective on lowering soil pH to around 1.5 near the anode which is beneficial for the dissolution of metal(loid)s, thus increasing their overall solubility. The acidification in the anode soil efficiently increased the water soluble (SOL) and exchangeable (EXC) Pb, As and Cs, implying enhanced solubility and elevated overall potential bioavailability in the anode region while lower solubility in the cathode areas. Bioaccumulations of Pb, As and Cs were largely determined by the nature of elements, loading levels and EKF treatment. The native Pb in soil usually is not bioavailable. However, EKF treatment tends to transfer Pb to the SOL and EXC fractions improving the phytoextraction efficiency. Similarly, EKF transferred more EXC As and Cs to the SOL fraction significantly increasing their bioaccumulation in plant roots and shoots. Pb and As were accumulated more in plant roots than in shoots while Cs was accumulated more in shoots due to its similarity of chemical properties to potassium. Indian mustard, spinach and cabbage are good accumulators for Cs. Translocation of Pb, As and Cs from plant roots to shoots were enhanced by EKF. However, this study indicated the overall low phytoextraction efficiency of these plants. (C) 2015 Elsevier Inc. All rights reserved.


英文关键词Metal(loid) Mobility Bioavailability Bioaccumulation Electro-kinetic remediation Phytoremediation
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000368753400003
WOS关键词MUSTARD BRASSICA-JUNCEA ; POTENTIAL LEACHING RISK ; TOXIC HEAVY-METALS ; ARID-ZONE SOILS ; INDIAN MUSTARD ; SEQUENTIAL EXTRACTION ; ENHANCED PHYTOREMEDIATION ; PLANTS ; ACCUMULATION ; ZN
WOS类目Environmental Sciences ; Toxicology
WOS研究方向Environmental Sciences & Ecology ; Toxicology
来源机构河海大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/192522
作者单位1.Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;
2.Jackson State Univ, Dept Chem & Biochem, 1400 JR Lynch St,POB 17910, Jackson, MS 39217 USA
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GB/T 7714
Mao, Xinyu,Han, Fengxiang X.,Shao, Xiaohou,et al. Electro-kinetic remediation coupled with phytoremediation to remove lead, arsenic and cesium from contaminated paddy soil[J]. 河海大学,2016,125:16-24.
APA Mao, Xinyu.,Han, Fengxiang X..,Shao, Xiaohou.,Guo, Kai.,McComb, Jacqueline.,...&Zhang, Zhanyu.(2016).Electro-kinetic remediation coupled with phytoremediation to remove lead, arsenic and cesium from contaminated paddy soil.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,125,16-24.
MLA Mao, Xinyu,et al."Electro-kinetic remediation coupled with phytoremediation to remove lead, arsenic and cesium from contaminated paddy soil".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 125(2016):16-24.
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