摘要
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.
出处
《水资源保护》
CAS
2013年第6期70-74,共5页
Water Resources Protection
基金
国家水体污染控制与治理科技重大专项(2009ZX07212003)
关键词
零价铁
地下水
硝酸盐
影响因素
zero-valent iron
groundwater
nitrate
influencing factors
