pH值对滤池处理高浓度铁、锰及氨氮地下水的影响

发布时间：2018-04-26 05:33

本文选题：地下水 + 除铁除锰　；参考：《中国给水排水》2015年23期

【摘要】：以哈尔滨市某地高铁、高锰、高氨氮(平均浓度分别为15、1.0、2.2 mg/L)的地下水作为处理对象,通过调节其p H值分别为6.5、7.0和7.5,考察不同p H值条件下对铁、锰和氨氮的去除效果,并对填料的表面形态进行SEM和EDS分析。结果表明:p H值越高,滤池挂膜时间越短,对锰和氨氮的去除效能越好。在p H值为7.5、7.0和6.5时,滤池分别在第40、80和170天表现出去除氨氮的能力,80、110和190 d后不同p H值下的去除效果趋于一致,出水值维持在0.4~0.5 mg/L。p H值越高越有利于锰的去除,p H值为7.5时滤池出水锰含量均可达标;p H值为7.0的滤池也有一定的除锰能力,锰砂滤池出水为0.3 mg/L,石英砂出水为0.6 mg/L;p H值为6.5的滤池运行220 d后仍没有除锰效果。p H值对滤池除铁没有影响,运行150 d后,出水铁含量均在0.3 mg/L以下,除铁主要是依靠接触氧化作用。p H值越低则滤料表面铁含量越高,铁深入滤柱下层,干扰锰质活性滤膜的形成进而影响对锰的去除。
[Abstract]:The removal effect of Fe, mn and NH3-N was investigated by adjusting the pH values of high iron, high manganese and high ammonia nitrogen (151.0 mg / L) groundwater in Harbin by adjusting the pH values of 6.5g / L and 6.5g / L, respectively, under different pH values. The surface morphology of filler was analyzed by SEM and EDS. The results showed that the higher the ratio of ratio to H was, the shorter the membrane time of filter was and the better the removal efficiency of manganese and ammonia nitrogen was. At pH values of 7.5 and 6.5, the removal efficiency of ammonia nitrogen was similar at 4080 and 170 days after different pH values. The higher the effluent value is, when the manganese removal value is 7.5, the effluent manganese content of the filter can reach the standard of pH 7.0, and the filter with pH value of 7.0 also has certain manganese removal capacity. The manganese sand filter effluent was 0.3 mg / L, and the quartz sand effluent was 0.6 mg / L ~ (-1) H = 6.5. After 220 days of operation, there was no effect of manganese removal effect. The iron content of the effluent was below 0.3 mg/L after 150 days of operation. Iron removal mainly depends on the contact oxidation. The lower the value of pH is, the higher the iron content on the surface of the filter media is, and the lower the iron content is, the deeper the iron content is, which interferes with the formation of manganese active filter membrane and then affects the removal of manganese.
【作者单位】：哈尔滨工业大学城市水资源与水环境国家重点实验室;哈尔滨利民经济技术开发区自来水公司;哈尔滨市呼兰区自来水公司;
【基金】：教育部新世纪优秀人才项目(NCET-13-0169) 城市水资源与水环境国家重点实验室自主课题(2014DX04)
【分类号】：TU991.2

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