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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electrolysis with diamond anodes of the effluents of a combined soil washing - ZVI dechlorination process

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Author(s):
Carvalho de Almeida, C. [1] ; Munoz-Morales, M. [2] ; Saez, C. [2] ; Canizares, P. [2] ; Martinez-Huitle, C. A. [1] ; Rodrigo, M. A. [2]
Total Authors: 6
Affiliation:
[1] Univ Fed Rio Grande do Norte, Inst Chem, Campus Univ, BR-59078970 Natal, RN - Brazil
[2] Univ Castilla La Mancha, Dept Chem Engn, Fac Chem Sci & Technol, Campus Univ S-N, E-13071 Ciudad Real - Spain
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF HAZARDOUS MATERIALS; v. 369, p. 577-583, MAY 5 2019.
Web of Science Citations: 0
Abstract

In this work, a new soil washing process in which Soil-Liquid extraction technology is enhanced by adding iron particles (zero valent iron nanoparticles or granules) was investigated to remove clopyralid from spiked soils. This novel approach can be efficiently used to extract chlorinated hydrocarbons from soil and aims to obtain soil washing wastes with low content of hazardous chlorinated species. The iron particles used were subsequently removed from the treated soil using magnetic fields. Then, the complete mineralization of the produced soil washing effluents was successfully achieved by applying anodic oxidation with diamond anodes in an electrochemical flow cell. Results demonstrated that, opposite to what it was initially expected, no improvements in the efficiency of the electrochemical process were observed by adding iron particles during the soil washing. This behavior is explained in terms of the lower electrochemical reactivity of the dechlorinated derivatives produced. Although results are not as promising as initially expected, it does not mean a completely negative outcome for the use of ZVI during washing, because the hazardousness of the pollutants is rapidly decreased in the initial stages of the soil-washing, opening the possibility for the combination of this technology with other procecces, such as biological treatment. (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support type: Research Projects - Thematic Grants