| 东阿水文地质单元地下水硝酸盐污染来源的同位素分析 |
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| 引用本文： | 李 扬,杨 桢,康凤新,刘金勇,孙彦伟,黄静波.东阿水文地质单元地下水硝酸盐污染来源的同位素分析[J].中国岩溶,2019,38(1):19-27. |
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| 作者姓名： | 李 扬 杨 桢 康凤新 刘金勇 孙彦伟 黄静波 |
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| 作者单位： | 1.山东省物化探勘查院，济南 250013/山东省土壤地球化学工程实验室，济南 250013 |
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| 基金项目： | 山东省自然科学基金“运用氮、氧同位素判别聊城城区地下水氮污染源关键技术研究”（ZR2017QD016)；山东省博士后创新项目专项基金“基于15N技术的岩溶地下水硝酸盐演化机理研究”（201502020）；山东省地矿局地质勘查科研项目“岩溶地下水水质演化机制及趋势预测研究”（KY201515） |
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| 摘 要： | 针对近年来地下水硝酸盐污染日益严重的现象，本文运用氮同位素技术对位于典型农业区的东阿水文地质单元地下水氮污染来源进行了研究，结果表明:浅层地下水监测点的NO3-含量较高，平均含量为27.77 mg·L-1 ，δ15N 为7.8‰~12‰，反映了浅层地下水主要受到生活污水或粪便的污染；深层地下水（岩溶水）中NO3- 含量相对较低，平均含量为12.81 mg·L-1，δ15N为7.2‰~14.3‰，同样指示为生活污水或粪便污染，与补给区人为干扰密切相关。部分监测点地下水质量较差，建议研究区内使用高效的灌溉技术及科学的施肥方式，补给区附近的家禽养殖场可通过修建发酵池和改善饲料配方等方式，从源头上降低地下水硝酸盐的输入量。
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| 关 键 词： | 氮同位素 地下水 氮污染源 农业区 |
Isotope analysis on the source of nitrate contamination to groundwater in the Dong’e hydrogeologic unit |
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| LI Yang,YANG Zhen,KANG Fengxin,LIU Jinyong,SUN Yanwei and HUANG Jingbo.Isotope analysis on the source of nitrate contamination to groundwater in the Dong’e hydrogeologic unit[J].Carsologica Sinica,2019,38(1):19-27. |
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| Authors: | LI Yang YANG Zhen KANG Fengxin LIU Jinyong SUN Yanwei and HUANG Jingbo |
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| Institution: | 1.Shandong Geophysical and Geochemical Exploration Institute, Jinan, Shandong 250013 ，China/Shandong Soil Geochemical Engineering Laboratery, Jinan, Shandong 250013 , China2.Shandong Geophysical and Geochemical Exploration Institute, Jinan, Shandong 250013 ，China3.Shandong Bureau of Geology&Mineral Resources,Jinan,Shandong 250013 , China |
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| Abstract: | In recent years, nitrate pollution to groundwater has been increasingly serious, In this work, nitrogen isotope technique was used to study such pollution in a typical agricultural area of the Dong’e hydrogeological unit. The results show that the content of NO3- at monitoring sites of shallow groundwater is high with average content of 27.77 mg·L-1; and the content of δ15N is between 7.8‰ to 12‰, indicating the shallow groundwater is contaminated by sewage or feces. NO3- content of deep groundwater (karst water) is relatively low with an average value 12.81 mg·L-1, and the content of δ15N is in 7.2‰-14.3‰ also indicating sewage or fecal contamination, closely related to human disturbance. The groundwater quality of some monitoring sites is poor. It is suggested that efficient irrigation technology and scientific fertilization should be used in the study area, poultry farms can be built through fermentation tanks and improved feed formulations, thus to reduce the exogenous input of groundwater nitrate from the source. |
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| Keywords: | nitrogen isotope groundwater nitrogen pollution source agricultural area |
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