title: Synergistic effect of ozonation and ionizing radiation for PVA decomposition.
abstract: Ozonation and ionizing radiation are both advanced oxidation processes (AOPs) without chemical addition and secondary pollution. Also, the two processes' efficiency is determined by different pH conditions, which creates more possibilities for their combination. Importantly, the combined process of ozonation and ionizing radiation could be suitable for treating wastewaters with extreme pH values, i.e., textile wastewater. To find synergistic effects, the combined process of ozonation and ionizing radiation mineralization was investigated for degradation of polyvinyl alcohol (PVA) at different pH levels. A synergistic effect was found at initial pH in the range 3.0-9.4. When the initial pH was 3.0, the combined process of ozonation and ionizing radiation gave a PVA mineralization degree of 17%. This was 2.7 times the sum achieved by the two individual processes, and factors of 2.1 and 1.7 were achieved at initial pH of 7.0 and 9.4, respectively. The combined process of ozonation and ionizing radiation was demonstrated to be a feasible strategy for treatment of PVA-containing wastewater.
authors.affiliation: College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China. Electronic address: swh@shnu.edu.cn.
authors.forename: Weihua
authors.initials: W
authors.lastname: Sun
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China; Zhejiang Provincial Key Laboratory of Water Science and Technology, Zhejiang Province, Jiaxing 314006, China. Electronic address: chenlj@tsinghua.edu.cn.
authors.forename: Lujun
authors.initials: L
authors.lastname: Chen
authors.affiliation: College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China.
authors.forename: Jianlong
authors.initials: J
authors.lastname: Wang
mesh_terms: D007220:Industrial Waste; D010126:Ozone / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D011839:Radiation, Ionizing; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D007220:Industrial Waste; D010126:Ozone; D011142:Polyvinyl Alcohol; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Ionizing radiation; Mineralization; Ozonation; PVA; Synergistic effect