张晶;刘运德;周爱国;张俊;张远征;王东;

• 1:中国地质大学(武汉)环境学院
• 2:中国地质大学(武汉)生物地质与环境地质国家重点实验室
• 3:中国地质调查局西安地质调查中心
• 4:中国地质大学(武汉)地质调查研究院

摘要(Abstract)：

水资源短缺的西北干旱-半干旱地区,作为重要供水水源的地下水遭受硝酸盐等污染问题日益突出。识别地下水硝酸盐来源及其迁移转化过程对于污染防治至关重要。溶解性有机质(DOM)及其组分特征对于硝酸盐的迁移转化有着重要影响,因此,探究DOM组成特征与地下水硝酸盐污染相关性显得尤为必要。以鄂尔多斯盆地北部湖泊集中区作为研究区,运用紫外-可见光光谱技术和荧光光谱技术手段,表征了硝酸盐污染地下水中DOM的组成特性,分析了地下水硝酸盐污染成因。结果表明,研究区深度400 m以上的地下水受到不同程度的硝酸盐污染,其主要是由于农牧业活动和生活污水等产生硝酸盐污染,同时质地疏松的沙质土包气带有利于地表污染渗入地下水中。此外,地下水中DOM主要来源于地表,使得反硝化作用较弱,不利于地下水中NO~-_3的自然衰减。

关键词(KeyWords)： 溶解性有机质(DOM);荧光光谱;紫外-可见光谱;硝酸盐;地下水

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41772263;41672245);; 中央高校基本科研业务费专项资金资助项目(CUG170644);; 中国地质调查局干旱-半干旱区地下水与生态重点实验室基金项目(KLGEAS201602)

作者(Author): 张晶;刘运德;周爱国;张俊;张远征;王东;

Email:

DOI: 10.19509/j.cnki.dzkq.2019.0428

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