Combined soil washing and CDEO for the removal of atrazine from soils

JOURNAL OF HAZARDOUS MATERIALS

卷:300

Article

dos Santos, Elisama Vieira¹  Saez, Cristina²  Martinez-Huitle, Carlos Alberto¹  Canizares, Pablo²  Rodrigo, Manuel Andres² 

[1] Univ Fed Rio Grande do Norte, Inst Chem, BR-59078970 Natal, RN, Brazil

[2] Univ Castilla La Mancha, Dept Chem Engn, E-13071 Ciudad Real, Spain

关键词: Pesticide;    Soil remediation;    Surfactant;    Soil washing;    Conductive diamond;    Electrolysis;   

DOI  :  10.1016/j.jhazmat.2015.06.064

来源: Elsevier

【 摘 要 】

In this work, it is studied the removal of atrazine from spiked soils by soil washing using surfactant fluids, followed by the treatment of the resulting washing waste by electrolysis with boron doped diamond (BDD) anode. Results confirm that combination of both technologies is efficient for the removal and total mineralization of atrazine. Ratio surfactant/soil is a key parameter for the removal of atrazine from soil and influences significantly in the characteristic of the wastewater produced, affecting not only to the total organic load but also to the mean size of micelles. The higher the ratio surfactant soil, the lower is the size of the particles. Electrolyses of this type of waste attain the complete mineralization. TOC and COD are removed from the start of the treatment but the key of the treatment is the reduction in size of the micelles, which lead to a higher negative charge in the surface and to the faster depletion of the surfactant as compared with the pesticide. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free