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Integration of Fenton's reaction based processes and cation exchange processes in textile wastewater treatment as a strategy for water reuse

Silva, Laís G.M. ; Moreira, Francisca C. ; Cechinel, Maria Alice P. ; Mazur, Luciana P. ; de Souza, Antônio A. Ulson ; Souza, Selene M.A. Guelli U. ; Boaventura, Rui A.R. ; Vilar, Vítor J.P.

Journal of environmental management, 2020-10, Vol.272, p.111082-111082, Article 111082 [Periódico revisado por pares]

Elsevier Ltd

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  • Título:
    Integration of Fenton's reaction based processes and cation exchange processes in textile wastewater treatment as a strategy for water reuse
  • Autor: Silva, Laís G.M. ; Moreira, Francisca C. ; Cechinel, Maria Alice P. ; Mazur, Luciana P. ; de Souza, Antônio A. Ulson ; Souza, Selene M.A. Guelli U. ; Boaventura, Rui A.R. ; Vilar, Vítor J.P.
  • Assuntos: Advanced oxidation processes ; Algal biomass ; Natural cation exchanger ; Recalcitrant compounds ; Textile wastewater ; Water reuse
  • É parte de: Journal of environmental management, 2020-10, Vol.272, p.111082-111082, Article 111082
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: The remediation of a real textile wastewater aiming its reuse in the textile industry was carried out by integrating two processes: (i) a chemical or electrochemical advanced oxidation process (AOP or EAOP) based on Fenton's reaction for organics degradation, and (ii) a cation exchange process using marine macroalgae for removal of the iron acting in the Fenton's reaction based processes. Four AOPs/EAOPs at acidic pH 2.8 were tested: Fenton, photo-Fenton with ultraviolet A (UVA) radiation (PF/UVA), electro-Fenton (EF) and photoelectro-Fenton with UVA radiation (PEF/UVA). These processes provided very high color removals. After a running time of 45 min, the color removals were 68–95% for the Fenton process, 76–94% for the EF process, 80–98% for the PF/UVA process and 85–100% for the PEF/UVA process. In contrast, the mineralization was negligible for all the processes, indicating the generation/presence of persistent colorless compounds. The PF process was selected as first treatment stage due to its ability for color removal and related lower costs. A set of six marine macroalgae (Gracilaria caudata, Gracilaria cervicornis, Ascophyllum nodosum, Fucus spiralis, Laminaria hyperborea and Pelvetia canaliculata) were tested for iron uptake. Laminaria hyperborea showed the highest ion exchange capacity and affinity for iron species. Its application allowed the removal of all the iron acting in the PF process (3.4 mg/L). The textile wastewater resulting from the application of PF process followed by cation exchange with Laminaria hyperborea was successfully reused in scouring, bleaching and dyeing processes. [Display omitted] •Textile wastewater treatment coupling chemical oxidation and ion exchange.•High efficiency of Fenton's reaction based processes in wastewater decolorization.•Ability of marine macroalgae to remove iron from oxidized textile wastewater.•Ferric iron reduction to ferrous iron during the ion exchange process .•Feasibility of reusing the final wastewater in the textile processing.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
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