Advanced Treatment of Pesticide-Containing Wastewater Using Fenton Reagent Enhanced by Microwave Electrodeless Ultraviolet

BioMed Research International
Gong ChengJie Fu

Abstract

The photo-Fenton reaction is a promising method to treat organic contaminants in water. In this paper, a Fenton reagent enhanced by microwave electrodeless ultraviolet (MWEUV/Fenton) method was proposed for advanced treatment of nonbiodegradable organic substance in pesticide-containing biotreated wastewater. MWEUV lamp was found to be more effective for chemical oxygen demand (COD) removal than commercial mercury lamps in the Fenton process. The pseudo-first order kinetic model can well describe COD removal from pesticide-containing wastewater by MWEUV/Fenton, and the apparent rate constant (k) was 0.0125 min(-1). The optimal conditions for MWEUV/Fenton process were determined as initial pH of 5, Fe(2+) dosage of 0.8 mmol/L, and H2O2 dosage of 100 mmol/L. Under the optimal conditions, the reaction exhibited high mineralization degrees of organics, where COD and dissolved organic carbon (DOC) concentration decreased from 183.2 mg/L to 36.9 mg/L and 43.5 mg/L to 27.8 mg/L, respectively. Three main pesticides in the wastewater, as Dimethoate, Triazophos, and Malathion, were completely removed by the MWEUV/Fenton process within 120 min. The high degree of pesticides decomposition and mineralization was proved by the detected inorg...Continue Reading

References

Jan 6, 2006·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Jae-Hong ParkSoon-Woong Chang
Oct 19, 2006·Water Research·Yang Deng, James D Englehardt
Jan 11, 2011·Environmental Technology·Claudio ZaroraPatricia Gonzalez
Jan 23, 2013·Environmental Science and Pollution Research International·Puthiya Veetil NidheeshSrikrishnaperumal Thanga Ramesh
Nov 1, 2013·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Waraluk SabaikaiYoshinori Kawase

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Citations

Aug 15, 2018·Environmental Science and Pollution Research International·Aiping ZhangGuobin Jiang
May 18, 2020·Environmental Geochemistry and Health·Trinh Dinh TranYutaka Sakakibara
Nov 27, 2021·The Science of the Total Environment·Lizeth Parra-ArroyoRoberto Parra-Saldívar

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