Advanced Treatment of Coking Wastewater by Oxidation Process Using Pyrite and Hydrogen Peroxide

Abstract:

Coking wastewater is a kind of recalcitrant wastewater including complicate compositions. Advanced treatment of coking wastewater by Fenton-Like reaction using pyrite as catalyst was investigated in this paper. The results show that the chemical oxygen demand (COD) of coking wastewater decreased significantly by method of coagulation combined with two-stage oxidation reaction. COD of wastewater can decrease from 250mg/l to 45mg/l after treatment, when 2g/L pyrite was used in each stage oxidation and the dosage of hydrogen peroxide (H₂O₂) is 0.2ml/l for first stage treatment, 0.1ml/l for second stage treatment respectively. The pyrite is effective to promote Fenton-Like reaction with low cost due to high utilization efficiency of H₂O₂, moreover, catalyst could be easily recovered and reused. The Fenton-Like reaction might be used as a potential alternative to advanced treatment of recalcitrant wastewater.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 2521-2525
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.2521
• Online since: August 2013
• Authors: Zhi Yong Zhang, De Li Wu
• Keywords: Advanced Treatment, Catalyze, Coking Wastewater, Pyrite

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