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Coagulation-flocculation sequential with Fenton or Photo-Fenton processes as an alternative for the industrial textile wastewater treatment.
J Environ Manage. 2017 Apr 15; 191:189-197.JE

Abstract

In this study, the industrial textile wastewater was treated using a chemical-based technique (coagulation-flocculation, C-F) sequential with an advanced oxidation process (AOP: Fenton or Photo-Fenton). During the C-F, Al2(SO4)3 was used as coagulant and its optimal dose was determined using the jar test. The following operational conditions of C-F, maximizing the organic matter removal, were determined: 700 mg/L of Al2(SO4)3 at pH = 9.96. Thus, the C-F allowed to remove 98% of turbidity, 48% of Chemical Oxygen Demand (COD), and let to increase in the BOD5/COD ratio from 0.137 to 0.212. Subsequently, the C-F effluent was treated using each of AOPs. Their performances were optimized by the Response Surface Methodology (RSM) coupled with a Box-Behnken experimental design (BBD). The following optimal conditions of both Fenton (Fe2+/H2O2) and Photo-Fenton (Fe2+/H2O2/UV) processes were found: Fe2+ concentration = 1 mM, H2O2 dose = 2 mL/L (19.6 mM), and pH = 3. The combination of C-F pre-treatment with the Fenton reagent, at optimized conditions, let to remove 74% of COD during 90 min of the process. The C-F sequential with Photo-Fenton process let to reach 87% of COD removal, in the same time. Moreover, the BOD5/COD ratio increased from 0.212 to 0.68 and from 0.212 to 0.74 using Fenton and Photo-Fenton processes, respectively. Thus, the enhancement of biodegradability with the physico-chemical treatment was proved. The depletion of H2O2 was monitored during kinetic study. Strategies for improving the reaction efficiency, based on the H2O2 evolution, were also tested.

Authors+Show Affiliations

GIPAB: Grupo de Investigación en Procesos Ambientales, Departamento de Ingeniería de Procesos, Universidad EAFIT, Carrera 49 #7 sur 50, Medellín, Colombia. Electronic address: egil@eafit.edu.co.Grupo de Investigación en Procesos Reactivos Intensificados con Separación y Materiales Avanzados - PRISMA, Departamento de Física y Química, Facultad de Ciencias Exactas y Naturales, Sede Manizales, Campus La Nubia, Km 9 Vía al Aeropuerto la Nubia, Apartado Aéreo 127, Manizales, Caldas, Colombia.Grupo de Investigación en Procesos Reactivos Intensificados con Separación y Materiales Avanzados - PRISMA, Departamento de Ingeniería Química, Facultad de Ingeniería y Arquitectura, Universidad Nacional de Colombia, Sede Manizales, Campus La Nubia, Km 9 Vía al Aeropuerto la Nubia, Apartado Aéreo 127, Manizales, Caldas, Colombia.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28092755

Citation

GilPavas, Edison, et al. "Coagulation-flocculation Sequential With Fenton or Photo-Fenton Processes as an Alternative for the Industrial Textile Wastewater Treatment." Journal of Environmental Management, vol. 191, 2017, pp. 189-197.
GilPavas E, Dobrosz-Gómez I, Gómez-García MÁ. Coagulation-flocculation sequential with Fenton or Photo-Fenton processes as an alternative for the industrial textile wastewater treatment. J Environ Manage. 2017;191:189-197.
GilPavas, E., Dobrosz-Gómez, I., & Gómez-García, M. Á. (2017). Coagulation-flocculation sequential with Fenton or Photo-Fenton processes as an alternative for the industrial textile wastewater treatment. Journal of Environmental Management, 191, 189-197. https://doi.org/10.1016/j.jenvman.2017.01.015
GilPavas E, Dobrosz-Gómez I, Gómez-García MÁ. Coagulation-flocculation Sequential With Fenton or Photo-Fenton Processes as an Alternative for the Industrial Textile Wastewater Treatment. J Environ Manage. 2017 Apr 15;191:189-197. PubMed PMID: 28092755.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Coagulation-flocculation sequential with Fenton or Photo-Fenton processes as an alternative for the industrial textile wastewater treatment. AU - GilPavas,Edison, AU - Dobrosz-Gómez,Izabela, AU - Gómez-García,Miguel Ángel, Y1 - 2017/01/14/ PY - 2016/07/20/received PY - 2016/12/29/revised PY - 2017/01/07/accepted PY - 2017/1/17/pubmed PY - 2017/5/5/medline PY - 2017/1/17/entrez KW - Advanced oxidation processes KW - Chemical coagulation KW - Fenton KW - Industrial textile wastewater KW - Photo-Fenton SP - 189 EP - 197 JF - Journal of environmental management JO - J. Environ. Manage. VL - 191 N2 - In this study, the industrial textile wastewater was treated using a chemical-based technique (coagulation-flocculation, C-F) sequential with an advanced oxidation process (AOP: Fenton or Photo-Fenton). During the C-F, Al2(SO4)3 was used as coagulant and its optimal dose was determined using the jar test. The following operational conditions of C-F, maximizing the organic matter removal, were determined: 700 mg/L of Al2(SO4)3 at pH = 9.96. Thus, the C-F allowed to remove 98% of turbidity, 48% of Chemical Oxygen Demand (COD), and let to increase in the BOD5/COD ratio from 0.137 to 0.212. Subsequently, the C-F effluent was treated using each of AOPs. Their performances were optimized by the Response Surface Methodology (RSM) coupled with a Box-Behnken experimental design (BBD). The following optimal conditions of both Fenton (Fe2+/H2O2) and Photo-Fenton (Fe2+/H2O2/UV) processes were found: Fe2+ concentration = 1 mM, H2O2 dose = 2 mL/L (19.6 mM), and pH = 3. The combination of C-F pre-treatment with the Fenton reagent, at optimized conditions, let to remove 74% of COD during 90 min of the process. The C-F sequential with Photo-Fenton process let to reach 87% of COD removal, in the same time. Moreover, the BOD5/COD ratio increased from 0.212 to 0.68 and from 0.212 to 0.74 using Fenton and Photo-Fenton processes, respectively. Thus, the enhancement of biodegradability with the physico-chemical treatment was proved. The depletion of H2O2 was monitored during kinetic study. Strategies for improving the reaction efficiency, based on the H2O2 evolution, were also tested. SN - 1095-8630 UR - https://www.unboundmedicine.com/medline/citation/28092755/Coagulation_flocculation_sequential_with_Fenton_or_Photo_Fenton_processes_as_an_alternative_for_the_industrial_textile_wastewater_treatment_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0301-4797(17)30023-3 DB - PRIME DP - Unbound Medicine ER -