Wet air oxidation of epoxy acrylate monomer industrial wastewater

• Published in: Journal of hazardous materials Vol. 178; no. 1; pp. 786 - 791
• Main Authors: Yang, Shaoxia, Liu, Zhengqian, Huang, Xiaohui, Zhang, Beiping
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.06.2010; Elsevier
• Subjects: Applied sciences; Benzhydryl Compounds; Catalysis; Catalytic reactions; Catalytic wet air oxidation; Chemical engineering; Chemistry; CuO; Environmental Restoration and Remediation; Epoxy acrylate monomer; Epoxy Resins - chemistry; Exact sciences and technology; General and physical chemistry; General purification processes; Humidity; Hydrogen-Ion Concentration; Medical Waste - analysis; Oxidation-Reduction; Oxygen - analysis; Oxygen - chemistry; Pollution; Reactors; Temperature; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Waste Disposal, Fluid - methods; Wastewater treatment; Wastewaters; Water Purification; Water treatment and pollution; Catalytic wet air oxidation; Epoxy acrylate monomer; CuO; Wastewater treatment; Catalytic reaction; Biodegradability; Waste water; Pollutant; Chemical oxygen demand; Industrial waste water; Biological oxygen demand; Water quality; Wet air; Oxidation; Total organic carbon; Waste water purification; Catalyst
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2010.02.009

Epoxy acrylate monomer industrial wastewater contained highly concentrated and toxic organic compounds. The wet air oxidation (WAO) and catalytic wet air oxidation (CWAO) were used to eliminate pollutants in order to examine the feasibility of the WAO/CWAO as a pre-treatment method for the industrial wastewater. The results showed that in the WAO 63% chemical oxygen demand (COD) and 41% total organic carbon (TOC) removals were achieved and biological oxygen demand (BOD 5)/COD ratio increased from 0.13 to 0.72 after 3 h reaction at 250 °C, 3.5 MPa and the initial concentration of 100 g COD/L. Among homogenous catalysts (Cu 2+, Fe 2+, Fe 3+ and Mn 2+ salts), Cu 2+ salt exhibited better performance. CuO catalyst was used in the CWAO of the wastewater, COD and TOC conversion were 77 and 54%, and good biodegradability was achieved. The results proved that the CWAO was an effective pre-treatment method for the epoxy acrylate monomer industrial wastewater.