Using poly-glutamic acid as soil-washing agent to remediate heavy metal-contaminated soils

Environmental Science and Pollution Research International
Zong-Han YangChih-Ming Kao

Abstract

The extraction efficiency of heavy metals from soils using three forms of gamma poly-glutamic acid (γ-PGA) as the washing agents was investigated. Controlling factors including agent concentrations, extraction time, pH, and liquid to soil ratio were evaluated to determine the optimum operational conditions. The distribution of heavy metal species in soils before and after extraction processes was analyzed. Up to 46 and 74% of heavy metal removal efficiencies were achieved with one round and a sequential extraction process using H-bonding form of γ-PGA (200 mM) with washing time of 40 min, liquid to solid ratio of 10 to 1, and pH of 6. Major heavy metal removal mechanisms were (1) γ-PGA-promoted dissolution and (2) complexation of heavy metal with free carboxyl groups in γ-PGA, which resulted in heavy metal desorption from soils. Metal species on soils were redistributed after washing, and soils were remediated without destruction of soil structures and productivity.

References

Nov 10, 2005·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Moon-Hee SungMakoto Ashiuchi
Jan 3, 2006·Colloids and Surfaces. B, Biointerfaces·Wen-Ching LinMing-Chien Yang
Aug 17, 2006·Journal of Agricultural and Food Chemistry·B Stephen InbarajB H Chen
Jun 25, 2008·Bioresource Technology·B Stephen InbarajB H Chen
Jan 9, 2009·Journal of Agricultural and Food Chemistry·F Y SiaoB H Chen
Dec 19, 2012·Environmental Pollution·Masa JelusicDomen Lestan
May 2, 2013·Acta Biomaterialia·Esther M ValliantJulian R Jones
May 22, 2013·TheScientificWorldJournal·Margaret E Sears
Jun 25, 2013·Journal of Hazardous Materials·Alireza Nezamzadeh-Ejhieh, Mehdi Kabiri-Samani
Oct 1, 2013·Journal of Hazardous Materials·Tao ZhangRong-Liang Qiu
Dec 10, 2013·The Science of the Total Environment·Masa Jelusic, Domen Lestan
Jan 8, 2014·Journal of Hazardous Materials·Nanthi BolanKirk Scheckel
Jul 30, 2014·Scientific Reports·Ruei-Feng ShiuChon-Lin Lee
Oct 8, 2014·Microbiology·Adetoro OgunleyeIza Radecka
Dec 29, 2015·Journal of Hazardous Materials·Clément TrelluMehmet A Oturan
May 25, 2016·Journal of Environmental Management·Giovanni VigliottaStefano Castiglione
Oct 11, 2016·Journal of Environmental Radioactivity·Shigeki Sakamoto, Yoshinori Kawase

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Citations

Sep 16, 2020·Analytical Methods : Advancing Methods and Applications·Xin YuanXiangyang Shi
Nov 16, 2019·Bulletin of Environmental Contamination and Toxicology·Mingli JiangLiang Shi
Jan 1, 2020·Environmental Science and Pollution Research International·Yen-Ping PengChing-Hsiang Wang
Jul 8, 2021·Journal of Hazardous Materials·Anyi Niu, Chuxia Lin

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