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An innovative process combining electrocoagulation and photoelectro-Fenton-like methods during the abatement of Acid Blue 113 dye by Ana A. Márquez; Oscar Coreño; José L. Nava is a Engineering article available to read on EtoBox.

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This paper focuses on the implementation of a smart hybrid water treatment process that combines electrocoagulation (EC) and active chlorine-based photoelectro-Fenton-like (PEF-like) methods to remove Acid Blue 113 (AB 113) dye, used as a model persistent organic pollutant (POP), from synthetic solutions containing chlorides. The composition of AB 113 solutions expressed in terms of chemical oxygen demand (COD) was 250-1000 mg L -1 in 2000 mg L -1 NaCl at neutral pH. EC is conceived as a dye removal process, where iron flocs partially remove the dye in high concentrations. The residual dye in the solution (after EC) is oxidized to CO 2 in the PEF-like treatment. An up-flow EC reactor was used for EC with two Fe plates as anode and cathode. A filter-press cell with a Ti|Ir-Sn-Sb-oxides anode and a stainless-steel cathode was employed for the PEF-like process. During PEFlike, the chloride is oxidized to HClO, reacting with residual Fe 2+ from the EC to yield • OH. In EC, the influence of the electrolyte flow velocity (0.69 ≤ u ≤ 3.47 cm s -1 ), applied current density (6 ≤ j ≤ 18 mA cm -2 ), and initial AB 113 dye on the COD and color removal were systematically examined. The solutio

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Author

Ana A. Márquez; Oscar Coreño; José L. Nava

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)