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中文摘要：
地下水中硝酸盐污染严重,采用室内试验装置,研究了以芦苇秸秆为碳源去除地下水中的硝酸盐的影响因素和效果,并探讨NO2^--N的积累规律.研究表明：①在反硝化过程中,总有机碳TOC与NO3^--N之间存在负相关性,而NO3^--N与HCO3-之间存在一定的负相关性;②要使处理后地下水中NO3^--N满足质量标准20mg·L^-1,出水TOC浓度需达到一定值;③实验中当出水C/N小于1时NO2^--N开始出现积累,NO2^--N积累与出水C/N之间满足一定的规律;最佳C/N约为1,可以同时满足出水NO3^--N、TOC、NO2^--N的要求.
英文摘要：
The factors influential on nitrate removal in groundwater were studied in laboratory equipment containing unprocessed reed stalks and sand and the rule governing nitrite accumulation was found.The results showed that：①Negative correlation existed between the TOC and NO3^--N,while negative correlation existed between the NO3^--N and HCO3- .②Some TOC was demanded if the NO3^--N was to meet the quality standards（20mg·L^-1）.③Nitrite accumulated when the C/N ratios were less than 1.00 and there were some rules between nitrite accumulation and C/N ratios.The optimal C/N ratio was assumed to be 1.00,at which more removal of NO3^--N is achieved with less excess TOC and NO2^--N in the effluent.
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