title: Combined soil washing and CDEO for the removal of atrazine from soils.
abstract: 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.
authors.affiliation: Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova CEP 59078-970, Natal, RN, Brazil.
authors.forename: Elisama Vieira
authors.initials: EV
authors.lastname: Dos Santos
authors.affiliation: Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071 Ciudad Real, Spain.
authors.forename: Cristina
authors.initials: C
authors.lastname: Sáez
authors.affiliation: Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova CEP 59078-970, Natal, RN, Brazil.
authors.forename: Carlos Alberto
authors.initials: CA
authors.lastname: Martínez-Huitle
authors.affiliation: Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071 Ciudad Real, Spain.
authors.forename: Pablo
authors.initials: P
authors.lastname: Cañizares
authors.affiliation: Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071 Ciudad Real, Spain.
authors.forename: Manuel Andres
authors.initials: MA
authors.lastname: Rodrigo
mesh_terms: D001280:Atrazine / Q000737:chemistry*; D001895:Boron / Q000737:chemistry; D018130:Diamond / Q000737:chemistry; D004566:Electrodes; D004572:Electrolysis; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007616:Kaolin / Q000737:chemistry; D010084:Oxidation-Reduction; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D012989:Soil Pollutants; D013431:Sulfates; D013501:Surface-Active Agents; D007616:Kaolin; D012967:Sodium Dodecyl Sulfate; D018130:Diamond; D001895:Boron; D001280:Atrazine
keywords: Conductive diamond; Electrolysis; Pesticide; Soil remediation; Soil washing; Surfactant