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di xia shui shui zhi de wu ran yu fang hu
Author(s): 
Pages: 59-61
Year: Issue:  4
Journal: Underground Water

Keyword:  地下水污染地下水水质地下水资源轻度污染水质污染水质标准污染物用水自然界多种元素;
Abstract: <正> 一、地下水水质及与人类的关系本讲座在第二讲中曾经指出,自然界几乎不存在纯净的水,或者仅含氢、氧两种元素的水。据测定,构成地壳的氧、硅、铝、铁、镁、硫、氯、氟等60多种元素在地下水中尽管不是同时都有,但几乎都可能存在。
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