有机物(特别是人畜粪便)污染水体后就可能有病原微生物和大量的细菌同时进入水中。复杂的有机物在水中微生物和氧的作用下,氧化成亚硝酸盐,亚硝酸盐又在硝酸菌的作用下氧化成硝酸盐(无机物),即标志此水已达净化。随着水的自净,病原微生物也随之消亡。所以,“三氮”的测定,可协助了解水体污染与水体自净作用情况,同时也认为,“三氮”与细菌学指标有一定的相关性。为了解这一关系及其程度,我们以农村大口井水为例,特作如下相关分析。 文中选取材料为定点监测的市郊农村大 Organic matter (especially human and animal feces) contaminated water may be pathogenic microorganisms and a large number of bacteria into the water at the same time. Complex organisms in the water under the action of microorganisms and oxygen, oxidation into nitrite, nitrite and nitrite bacteria in the role of oxidation to nitrate (inorganic), that marked the water has been purified. With the self-purification of water, pathogenic microorganisms also disappear. Therefore, the determination of “three nitrogen” can help understand the pollution of water bodies and self-purification of water body, and also think that the “three nitrogen” and bacteriological indicators have some relevance. In order to understand this relationship and its extent, we take the large well water in rural areas as an example to make the following special analysis. The article selects the material as the fixed-point monitoring suburban countryside big