Removal of Organic Pollutant in Sulfonated Drilling Wastewater with Novel Solar-Assisted Catalytic Oxidation Process

Abstract:

The chemical oxygen demand was over standard seriously due to residual organic additives in sulfonated drilling wastewater, especially sulfonated phenolic resin with hardly degradable chemical structure. The novel solar-assisted catalytic oxidation process was developed to remove the organic pollutants in sulfonated drilling wastewater. The factors including irradiation light source, oxidant, Fe²⁺, were investigated. The results showed that, solar has more catalytic effects than UV on H₂O₂-K₂S₂O₈/Fe²⁺ system, H₂O₂- K₂S₂O₈/Fe²⁺ system was more effective in degrading organic pollutants than H₂O₂/Fe²⁺ and K₂S₂O₈/Fe²⁺, in which the synergies occurred between H₂O₂ and K₂S₂O₈ in the solar-assisted catalytic oxidation process. The removal amount of organic pollutants was increased with the dosage of Fe²⁺ additon. With the catalytic oxidation process developed, the COD was reduced to 114.4 mg·L^-1. Meanwhile, the sulfonated phenolic resin was completely destroyed, and heavy metal was decreased significantly.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 1917-1921
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.1917
• Online since: August 2013
• Authors: Xian Bin Zhang, Zheng Song Qiu, Da Quan Huang, Cui Xue Ma, En Cui Guan
• Keywords: Hydroxyl Radical, Solar-Assisted Catalytic Oxidation Process, Sulfate Free Radical, Sulfonated Drilling Wastewater

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