上海某饮用水源地不同形态氮的时空分布研究

在2010~2012年进行的上海某水源地水质监测资料的基础上,应用纳氏试剂分光光度法等分析方法研究该水源地2011年1~10月总氮、氨氮、硝酸盐氮、亚硝酸盐氮等不同形态的氮素在水体中的空间分布规律及时间变化规律。并就其氮的来源、迁移转化机理和对氮的迁移转化有较大影响的因素进行研究和分析,得出该水库水体中各种形态氮以硝酸盐氮为主,平均占总氮的71.6%,氨氮及亚硝酸盐氮各占总氮的4.39%及0.95%;水体中的温度、光照条件、溶解氧、点位位置分布、水深等是影响各氮形态含量与分布的重要环境因子。

Research of Temporal and Spatial Distribution of Nitrogen in Different Forms of One Drinking Water Source in Shanghai

In this paper,based on the monitoring data obtained from a water source in Shanghai from 2010 to 2012,the laws of spatial and temporal distribution of nitrogen in different forms in waters from January to October of 2011 were studied by utilization of Nessler reagent spectrometry method.The different forms of nitrogen included total nitrogen,ammonia nitrogen,nitrate and nitrite.The sources of nitrogen,the mechanisms of nitrogen migration and transformation and the factors that would exert significant influences on nitrogen migration and transformation were further researched and analyzed.The results showed that nitrogen in the form of nitrate occupied the majority,accounting for 71.6％ of the total nitrogen,while nitrogen in the forms of ammonia nitrogen and nitrite accounted for 4.39％ and 0.95％ respectively.Therefore,the water temperature,light condition,dissolved oxygen,point distribution and water depth were the key environmental factors which had great influences on the content and distribution of nitrogen in different forms.