Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions,College of Environment and Planning,Henan University,Kaifeng 475004,China;
Key Laboratory of Pollution Ecology and Environmental Engineering,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China;
National Demonstration Center for Environmental and Planning,Henan University,Kaifeng 475004,China;
δ-MnO 2 modified activated carbon; Arsenate; Arsenite; Adsorption; Oxidation;