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根据很多城市地下水源的调查表明,地下水源均受到不同程度的NO_3~-污染。有的已大大地超过了国家饮用水标准,而NO_3~-也是地下水受到污染的标志之一。对此,本文讨论了NO_3~-与环境保护的关系。一、NO_3~-与环境水文地质的关系 NO_3~-在土壤、氮肥、大气降水、动物的排泄、工业污水和生活污水中都有。地下水受到NO_3~-的污染,除了与含水层、覆盖层的渗透性能有关之外,还与埋深有关。例如新
According to the survey of underground water sources in many cities, groundwater sources are subject to varying degrees of NO3 ~ - pollution. Some have greatly exceeded the national drinking water standards, and NO_3 ~ - is also one of the signs of groundwater contamination. In this regard, this paper discusses the relationship between NO_3 ~ and environmental protection. First, NO_3 ~ - and the relationship between environmental and hydrogeological NO_3 ~ - In the soil, nitrogen, atmospheric precipitation, animal excretion, industrial wastewater and domestic sewage are. Groundwater pollution by NO_3 ~ - in addition to aquifers, cover the permeability of the relevant, but also with the depth. For example new