沸石去除水中二价铁的研究

Study on Removal of Ferrous Ion in Water by Zeolite

研究沸石吸附柱去除地下水中二价铁的效果及影响因素。首先采用模拟地下水进行动态试验,其结果表明:水中二价铁离子初始浓度、吸附柱高度、进水流速等对二价铁交换容量均有不同程度的影响;然后采用盐酸逆流再生失效沸石,以再生效率和再生酸耗为衡量指标,考察了再生液浓度、再生液流速和再生时间对再生效果的影响;最后采用模拟试验中所得最佳运行参数,去除实际地下水中的二价铁离子,取得了较为理想的去除效果。

Removal of ferrous ion with zeolite was investigated. Firsdy, a series of column tests were performed to determine the breakthrough curves and ion exchange capacities with varying initial ferrous ion concentration, bed depths and water flow rates. Then, HC1 solution was used as a regenerant for modified zeolite. Influence that concentration of HC1, flow rate and regenerating time on regeneration effect was also studied. Lastly, ferrous ion in groundwater was removed by zeolite with optimal parameters obtained previously, and satisfactory removal efficiency was obtained.