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Title: Removal of oxyfluorfen from ex-situ soil washing fluids using electrolysis with diamond anodes
Authors: Santos, Elisama Vieira dos
Sáez, Cristina
Martínez-Huitle, Carlos Alberto
Cañizares, Pablo Canizares
Rodrigo, Manuel Andres
Keywords: Oxyfluorfen;Electrolysis;Soil remediation;Soil washing;Boron doped diamond
Issue Date: 15-Apr-2016
Publisher: Elsevier
Citation: SANTOS, E. V.; SAEZ, C.; MARTINEZ-HUITLE, C. A.; CANIZARES, P.; RODRIGO, M. A.. Removal of oxyfluorfen from ex-situ soil washing fluids using electrolysis with diamond anodes. Journal of Environmental Management, p. 1-7, 2016. Disponível em: Acesso em: 30 jul. 2020.
Portuguese Abstract: In this research, firstly, the treatment of soil spiked with oxyfluorfen was studied using a surfactant-aided soil-washing (SASW) process. After that, the electrochemical treatment of the washing liquid using boron doped diamond (BDD) anodes was performed. Results clearly demonstrate that SASW is a very efficient approach in the treatment of soil, removing the pesticide completely by using dosages below 5 g of sodium dodecyl sulfate (SDS) per Kg of soil. After that, complete mineralization of organic matter (oxyflourfen, SDS and by-products) was attained (100% of total organic carbon and chemical oxygen demand removals) when the washing liquids were electrolyzed using BDD anodes, but the removal rate depends on the size of the particles in solution. Electrolysis of soil washing fluids occurs via the reduction in size of micelles until their complete depletion. Lower concentrations of intermediates are produced (sulfate, chlorine, 4-(trifluoromethyl)-phenol and ortho-nitrophenol) during BDD-electrolyzes. Finally, it is important to indicate that, sulfate (coming from SDS) and chlorine (coming from oxyfluorfen) ions play an important role during the electrochemical organic matter removal
ISSN: 0301-4797
Appears in Collections:ECT - Artigos publicados em periódicos
IQ - Artigos publicados em periódicos

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