通过静态试验考察零价铁去除地下水硝酸盐的影响因素。结果表明：酸洗预处理可有效提高铁屑对NO-3-N的去除效果；NO-3-N初始质量浓度增加,NO-3-N去除率下降,平均去除速率升高；铁碳比为1：2时,反应结束时NO-3-N质量浓度最低,且活性炭可吸附反应产物NH+4-N,降低反应产生的碱度；实际地下水去除NO-3-N效果显著,试验结束时pH维持在10以下,其共存离子对pH值的变化有一定缓冲作用。%Factors in using zero-valent iron to remove nitrate in groundwater were studied through static experiments. The results show that pickling pretreatment can effectively improve the removal effect of NO-3-N. The removal rate of NO-3-N declined and the average removal rate of NO-3-N increased when the initial concentration of NO-3-N increased. The concentration of NO-3-N was at its lowest at the end of the reaction when the ratio of Fe0/C was 1:2, and activated carbon could adsorb the reaction product NH+4-N, which reduced the alkalinity of reaction. The effect of NO-3-N reduction in actual groundwater was significant: the pH value was below 10 when the experiment was finished, and coexisting ions had a certain buffering effect on the change of the pH value.
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