Catalytic Efficiency of Red Mud for the Degradation of Olive Mill Wastewater through Heterogeneous Fenton’s Process

CIEPQPF–Chemical Engineering Processes and Forest Products Research Center, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, RuaSílvio Lima, 3030-790 Coimbra, Portugal

CICECO–Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal

Author to whom correspondence should be addressed.

Water 2019, 11(6), 1183; https://doi.org/10.3390/w11061183

Received: 17 May 2019 / Revised: 31 May 2019 / Accepted: 3 June 2019 / Published: 6 June 2019

(This article belongs to the Special Issue Advanced Oxidation Technologies in Industrial Wastewater Treatment)

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Abstract

Olive mill wastewater is a challenging effluent, especially due to its toxicity related to the presence of phenolic compounds. Fenton’s process was analysed on the abatement of phenolic acids typically found in this kind of effluents. To overcome the main drawback of Fenton’s process, a waste from the aluminium industry commonly called red mud was used as a heterogeneous source of iron. The adsorption of simulated effluent on the red mud was negligible. Therefore, the degradation of phenolic acids during Fenton’s process was due to oxidation by hydroxyl radicals. The amount of red mud and hydrogen peroxide were optimized regarding phenolic acids degradation. The optimal conditions leading to the highest removal of contaminants (100% of phenolic acids degradation and 25% of mineralization after 60 min of reaction) were 1 g/L of catalyst and 100 mg/L of hydrogen peroxide. The possibility of recovering treated water for agricultural purposes was evaluated by assessing the toxic impact over a wide range of species. The toxicity observed for the treated samples was mainly related to the residual hydrogen peroxide remaining after treatment. View Full-Text

Keywords: Fenton’s process; red mud; toxicity assessment; phenolic acids; heterogeneous catalysts

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MDPI and ACS Style

Domingues, E.; Assunção, N.; Gomes, J.; Lopes, D.V.; Frade, J.R.; Quina, M.J.; Quinta-Ferreira, R.M.; Martins, R.C. Catalytic Efficiency of Red Mud for the Degradation of Olive Mill Wastewater through Heterogeneous Fenton’s Process. Water 2019, 11, 1183. https://doi.org/10.3390/w11061183

AMA Style

Domingues E, Assunção N, Gomes J, Lopes DV, Frade JR, Quina MJ, Quinta-Ferreira RM, Martins RC. Catalytic Efficiency of Red Mud for the Degradation of Olive Mill Wastewater through Heterogeneous Fenton’s Process. Water. 2019; 11(6):1183. https://doi.org/10.3390/w11061183

Chicago/Turabian Style

Domingues, Eva, Nelson Assunção, João Gomes, Daniela V. Lopes, Jorge R. Frade, Margarida J. Quina, Rosa M. Quinta-Ferreira, and Rui C. Martins. 2019. "Catalytic Efficiency of Red Mud for the Degradation of Olive Mill Wastewater through Heterogeneous Fenton’s Process" Water 11, no. 6: 1183. https://doi.org/10.3390/w11061183

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Catalytic Efficiency of Red Mud for the Degradation of Olive Mill Wastewater through Heterogeneous Fenton’s Process

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