Efficiency of modified chemical remediation techniques for soil contaminated by organochlorine pesticides

2nd International Congress of Mechanical Engineering and Agricultural Science

机械制造;农业科学

Correa-Torres, S.N.^1 ; Kopytko, M.^1 ; Avila, S.^1

Environmental Engineering Faculty, Universidad Pontificia Bolivariana, Bucaramanga Campus, Piedecuesta, Km 7.0. Off. K-107, Bucaramanga, Colombia^1

关键词: Bicarbonate solution;    Chemical oxidation;    Chemical techniques;    Contaminated soils;    Gas chromatography analysis;    Organochloride pesticides;    Organochlorine pesticides;    Oxidation chemistry;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/138/1/012020/pdf
DOI  :  10.1088/1757-899X/138/1/012020

学科分类：农业科学（综合）

来源: IOP

【 摘 要 】

This study reports the optimization of innovation chemical techniques in order to improve the remediation of soils contaminated with organochloride pesticides. The techniques used for remediation were dehalogenation and chemical oxidation in soil contaminated by pesticides. These techniques were applied sequentially and combined to evaluate the design optimize the concentration and contact time variables. The soil of this study was collect in cotton crop zone in Agustin Codazzi municipality, Colombia, and its physical properties was measure. The modified dehalogenation technique of EPA was applied on the contaminated soil by adding Sodium Bicarbonate solution at different concentrations and rates during 4, 7 and 14 days, subsequently oxidation technique was implemented by applying a solution of KMnO4at different concentration and reaction times. Organochlorine were detected by Gas Chromatography analysis coupled Mass Spectrometry and its removals were between 85.4- 90.0% of compounds such as 4, 4′-DDT, 4,4′-DDD, 4,4-DDE, trans-Clordane y Endrin. These results demonstrate that the technique of dehalogenation with oxidation chemistry can be used for remediation soils contaminated by organochloride pesticides.