1. School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; 2. Shaanxi Key Laboratory of Environmental Engineering, Xi'an 710055, China; 3. Key Laboratory of Northwest Water Resource, Ministry of Education, Xi'an 710055, China
Abstract：In order to enhance the surface membrane loading of the active filter media for catalytic oxidation removal of ammonium/ manganese from groundwater, effects of air-drying temperature on the catalytic activity, membrane loading strength and loading capacity of filter media were systematically studied with five identical filter columns to detest how ammonium and manganese concentrations along the depth of the filter column change with time. The results indicated that the air-drying treatment of the filter media could significantly shorten the recovery period for the removal of ammonium/manganese from the filter column, of which the recovery of ammonium removal activity firstly happened to the natural air-drying and 60℃ air-drying filter columns. After air-drying treatment, the removal capacity of ammonium/manganese was obviously enhanced with stable effluent ammonium concentration and no significant difference between different air-drying temperatures. Air-drying filter media could significantly improve the capacity of membrane loading. During the operation period, the surface membrane loading decreased first and then increased, especially for the un-air-drying filter media. The results from the XRD on the crystal structure of manganese oxides coated on the surface of the filter media samples confirmed that the initial filter media dried at different temperatures had the same complex crystal form. Obviously, the enhancement of membrane loading scheme proposed in this study could provide theoretical reference for large-scale preparation of the active filter media.
程亚, 曲木果洱, 熊卫耀, 黄廷林. 风干工艺强化催化氧化除氨氮/锰活性滤料膜负载[J]. 中国环境科学, 2022, 42(9): 4100-4106.
CHENG Ya, QUMU Guo-er, XIONG Wei-yao, HUANG Ting-lin. Membrane loading of active filter media for enhanced catalytic oxidation removal of ammonium/manganese by air - drying process. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(9): 4100-4106.
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