广西北海市冯家江河水及其沿岸地下水污染特征初探  

Preliminary Study of Contamination Characteristics in Surface Water and Groundwater of Fengjiajiang River, Beihai City, Guangxi

作　　者：陈雯[1] 余绍文[1] 张宏鑫[1] 刘怀庆[1] CHEN Wen;YU Shao-Wen;ZHANG Hong-Xin;LIU Huai-Qing(Wuhan Center of China Geological Survey,Wuhan 430205,China)

机构地区：[1]中国地质调查局武汉地质调查中心,武汉430205

出　　处：《华南地质与矿产》2020年第2期186-196,共11页Geology and Mineral Resources of South China

基　　金：中国地质调查局项目“北海海岸带陆海统筹综合地质调查”(121201009000172401)。

摘　　要：冯家江是广西北海地区重要的生态廊道,冯家江河水及其沿岸地下水污染日益严重,查明水体的污染状况对于污染防控具有重要的现实意义。本文选择冯家江河水及其沿岸地下水进行定量分析,初步研究并探讨了包括无机物和有机物在内的水质综合污染特征。结果表明:冯家江河水中氨氮、硝氮、COD超过了地表水Ⅲ类水标准,最大超标倍数分别为24.39倍、1.50倍、3.55倍,检测出有机氯农药、芳香烃、多环芳烃等7种有机物,其中有机氯农药p,p’-DDE超标7.14%,其他有机物均未超标。冯家江沿岸地下水中硝氮、氨氮超过地下水Ⅲ类水标准,最大超标倍数分别为1.63倍、3.1倍,检测出卤代烃、多环芳烃等3种有机物,均未超标。冯家江河水及沿岸地下水水质主要受到生活污水及人畜粪便排放、农业生产中面源污染的影响。基于水化学、同位素进行氮污染物来源分析及地表水和地下水的转化关系分析是下一步工作的重点。Fengjiajiang River is an important ecological corridor in Beihai city. The pollution of Fengjiajiang River and its coastal groundwater is increasingly serious. It is of great practical significance to find out the pollution status of water body for pollution prevention and control. In this paper, Fengjiajiang River and its coastal groundwater are selected for quantitative analysis, and the comprehensive pollution characteristics of water quality including inorganic and organic matters are preliminarily studied and discussed. The results showed that the ammonia nitrogen, nitrate nitrogen and COD in Fengjiajiang River water exceeded the class III water standard of surface water, the maximum exceeding times were 24.39 times, 1.50 times and 3.55 times, respectively. Seven kinds of organic compounds, including organochlorine pesticide, aromatic hydrocarbons, polycyclic aromatic hydrocarbons and other organic compounds, were detected, among which the organochlorine pesticide p, p’-DDE exceeded the standard by 7.14%, and the other organic compounds did not exceed the standard. The nitrate nitrogen and ammonia nitrogen in the groundwater along the Fengjiajiang River exceed the class Ⅲ standard of groundwater, and the maximum exceeding times are 1.63 times and 3.1 times, respectively. Three kinds of organic compounds such as halogenated hydrocarbon and polycyclic aromatic hydrocarbon are detected, all of which do not exceed the standard. The water quality of Fengjiajiang River and its coastal groundwater is mainly affected by the discharge of domestic sewage, human and animal manure, and non-point source pollution in agricultural production. Based on the hydrochemistry and isotope analysis, the source of nitrogen pollutants and the transformation relationship between surface water and groundwater are the focus of the next work.

关 键 词：地下水 无机污染 有机污染 冯家江 广西北海 

分 类 号：P641.69[天文地球—地质矿产勘探]