XIANG Qingyun 1, BAI Yang 1, YANG Mu 1, WANG Jie 1, YAN Kai 1, 2, YAO Wenqing 2, CAO Jiangli 1
(1. Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China; 2. Department of Chemistry, Tsinghua University, Beijing 100084, China)
Abstract: Wastewater containing polyvinyl alcohol (PVA) has caused serious water pollution problems. The polyvinyl alcohol is bad for the reoxygenation of the environmental water body due to its high COD value, difficulty of degradation, poor biodegradability and large surface activity. Hydrogenated zinc ferrite ceramic powder has good visible-ultraviolet light absorption property. The prepared hydrogenated zinc ferrite can improve the degradation of polyvinyl alcohol in wastewater as a photocatalyst. With the introduction of ozone and the irradiation by a LED lamp of 8 W, the degradation rate of 500 mg/L PVA (with COD value of 1105 mg/L) reached 66.7% within 120 minutes.
Key words: zinc ferrite; hydrogenation; photocatalytic degradation; polyvinyl alcohol