A novel advanced oxidation process to degrade organic pollutants in wastewater:Microwave-activated persulfate oxidation

作     者：YANG Shiying WANG Ping YANG Xin WEI Guang ZHANG Wenyi SHAN Liang 

作者机构：Key Laboratory of Marine Environment & Ecology Ministry of Education Qingdao 266100 China. College of Environmental Science and Engineering Ocean University of China Qingdao 266100 China. Qingdao Huashan Biochemical Company Limited Qingdao 266216 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2009年第21卷第9期

页      面：1175-1180页

核心收录：

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 083204[工学-水产品加工及贮藏工程] 

基　　金：CHEN Youyuan from College of Environmental Science and Engineering  Ocean University of China  and WANG Ping from Foreign Language School  Qingdao Agricultural University for the English revision of this manuscript 

主　　题：microwave-activated persulfate oxidation active carbon sulfate radical advanced oxidation technology 

摘      要：This article, for the first time, provides a novel advanced oxidation process based on sulfate radical （SO^4·-） to degrade organic pollutants in wastewater： microwave （MW）-activated persulfate oxidation （APO） with or without active carbon （AC）. Azo dye acid Orange 7 （AO7） is used as a model compound to investigate the high reactivity of MW-APO. It is found that AO7 （up to 1000 mg/L） is completely decolorized within 5-7 min under an 800 W MW furnace assisted-APO. In the presence of chloride ion （up to 0.50 mol/L）, the decolorization is still 100% completed, though delayed for about 1-2 min. Experiments are made to examine the enhancement by AC. It is exciting to find that the 100% decolorization of AO7 （500 mg/L） is achieved within 3 min by MW-APO using 1.0 g/L AC as catalyst, while the degradation efficiency maintains at 50% by MW energy without persulfate after about 5 min. Besides the destruction of visible light chromophore band of AO7 （484 nm）, during MW-APO, two bands in the ultraviolet region （228 nm and 310 nm） are rapidly broken down. The removal of COD is about 83%-95% for 500 mg/L AO7. SO^4·- is identified with quenching studies using specific alcohols. Both SO^4·- and ·OH could degrade AO7, but SO^4·- plays the dominant role. In a word, MW-APO AC is a new catalytic combustion technology for destruction of organic contamination even for high concentration.