CAS OpenIR
The effect of low-molecular-weight organic-acids (LMWOAs) on treatment of chromium-contaminated soils by compost-phytoremediation: Kinetics of the chromium release and fractionation
Chen, HX; Dou, JF; Xu, HB; Chen, Huixia; Dou, Junfeng; Xu, Hongbin
2018
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume70Pages:45
Abstract

A soil-plant biological system was developed from chromium (Cr) polluted soil treated by the compost-phytoremediation method. The transformation and migration of the Cr in this system is comprehensively studied in this research. The results illustrated that the co-composting treatment can reduce the Cr availability from 39% (F1 was about 31% of total, F2 was about 8% of total) to less than 2% by stabilizing the Cr. However, herbaceous plants can accumulate the concentrations of Cr from 113.8 to 265.2 mg/kg in the two crops, even though the concentration of soluble Cr in the substrate soil was below 0.1 mg/L. Cr can be assimilated and easily transferred in the tissues of plants because the low molecular- weight organic-acids (LMWOAs) derived from the plant root increase the bioavailability of Cr. The amount of extracted Cr dramatically increased when the organic acids were substituted in this order: citric acid > malic acid > tartaric acid > oxalic acid > acetic acid. On average the maximum(147.4 mg/kg) and the minimum(78.75 mg/kg) Cr were extracted by 20 mmol/L citric acid and acetic acid, respectively. The desorption of Cr in different acid solutions can be predicted by the pseudo second-order kinetics. The exchangeable Cr, carbonate-bound Cr, and residual Cr decreased, while Fe-Mn oxide bound Cr and organic bound Cr increased in the soil solid phase. According to the experimental results, the organic acids will promote the desorption and chelation processes of Cr, leading to the remobilization of Cr in the soil. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

KeywordChromium Sewage-sludge Phytoextraction Waste Desorption Plants Release Kinetics Rhizosphere Speciation Amendments Speciation Mobility Cadmium Roots Lead
SubtypeArticle
DOI10.1016/j.jes.2017.11.007
WOS IDWOS:000439688500006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26760
Collection中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Chen, HX,Dou, JF,Xu, HB,et al. The effect of low-molecular-weight organic-acids (LMWOAs) on treatment of chromium-contaminated soils by compost-phytoremediation: Kinetics of the chromium release and fractionation[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2018,70:45.
APA Chen, HX,Dou, JF,Xu, HB,Chen, Huixia,Dou, Junfeng,&Xu, Hongbin.(2018).The effect of low-molecular-weight organic-acids (LMWOAs) on treatment of chromium-contaminated soils by compost-phytoremediation: Kinetics of the chromium release and fractionation.JOURNAL OF ENVIRONMENTAL SCIENCES,70,45.
MLA Chen, HX,et al."The effect of low-molecular-weight organic-acids (LMWOAs) on treatment of chromium-contaminated soils by compost-phytoremediation: Kinetics of the chromium release and fractionation".JOURNAL OF ENVIRONMENTAL SCIENCES 70(2018):45.
Files in This Item:
File Name/Size DocType Version Access License
The effect of low-mo(488KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, HX]'s Articles
[Dou, JF]'s Articles
[Xu, HB]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, HX]'s Articles
[Dou, JF]'s Articles
[Xu, HB]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, HX]'s Articles
[Dou, JF]'s Articles
[Xu, HB]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.