深埋地热水中三氮分布特征及其影响因素研究

发布时间：2018-06-26 04:39

本文选题：地热水 + 三氮　；参考：《环境污染与防治》2017年11期

【摘要】：为有效控制深埋地热水中三氮污染,并为合理开发地热水资源提供理论依据,基于开封市城区44眼地热井(埋深为600~1 800m)的理化指标,绘制了三氮在各含水层中的浓度等值线图,研究了开封市地热水中三氮空间分布规律及其影响因素。研究结果表明:以《地下水质量标准》(GB/T 14848—93)的Ⅲ类水质要求为评价标准,开封市埋深为600~1 800m的地热水中,三氮污染以亚硝酸盐氮为主,硝酸盐氮与氨氮污染较轻;亚硝酸盐氮超标区主要分布在开封市火车站附近,其分布规律是发生不同程度硝化/反硝化作用的结果;除个别取样点外,各含水层中硝酸盐氮和氨氮的浓度均较低。相关分析结果表明,亚硝酸盐氮与硝酸盐氮显著相关,氨氮与pH显著相关,进一步证实了三氮浓度分布与硝化/反硝化作用有关。
[Abstract]:In order to effectively control the pollution of trinitrogen in deep geothermal water and to provide theoretical basis for the rational exploitation of geothermal water resources, based on the physical and chemical indexes of 44 geothermal wells in Kaifeng City (buried depth of 600 ~ 1 800 m), the contour map of concentration of trinitrogen in each aquifer is drawn. The spatial distribution of trinitrogen in geothermal water in Kaifeng city and its influencing factors were studied. The results show that in the groundwater quality standard (GB / T 14848-93), the water quality requirement of the third type is used as the evaluation standard. In the geothermal water with a depth of 600 ~ 1 800 m buried in Kaifeng City, nitrite nitrogen is the main pollution, nitrate nitrogen and ammonia nitrogen are less polluted. Nitrite nitrogen is mainly distributed near Kaifeng railway station, and the distribution law is the result of nitrification / denitrification of different degrees, except for some sampling points, the concentrations of nitrate nitrogen and ammonia nitrogen in each aquifer are lower. The results of correlation analysis showed that nitrite nitrogen was significantly correlated with nitrate nitrogen, while ammonia nitrogen was significantly correlated with pH, which further confirmed that the distribution of trinitrogen concentration was related to nitrification / denitrification.
【作者单位】：河南理工大学资源环境学院;中原经济区煤层(页岩)气河南省协同创新中心;中煤科工集团西安研究院有限公司;
【基金】：国家自然科学基金资助项目(No.41402216) 中国博士后科学基金面上资助项目(No.2016M602239) 河南省博士后经费资助项目
【分类号】：X523

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