拜泉镇城区地下水化学特征分析

拜泉镇区内地下水可划分为第四系松散岩类孔隙潜水和白垩系碎屑岩类孔隙-裂隙承压水两大类型,共采集了11个无机全分析水样(潜水水样点4个,承压水点7个)和4个有机分析水样(均为承压水)。潜水水化学类型以HCO3-C l为主,而承压水水化学类型则以HCO3型水。城区潜水可C l-、NO3-、NO2-、Mn2+、NH4+、TDS、总硬度等指标均超标,而承压水只有Mn2+、NH4+超标,且超标程度低于潜水。可见,研究区潜水的水质已经受到人类生活生产的污染,水质较承压水差。虽然,目前研究区承压地下水所测试的有机物含量均没有超过饮用水标准的限值,但4个地下水样中均检出农药成分"666",这说明了研究区承压水均受到了人类农业生产中使用农药的污染。

Analysis on Characteristics of Groundwater Chemistry in Baiquan County

Groundwater in Baiquan County can be divided into two types of Quaternary loose rock unconfined water and Cretaceous clastic rocks porosity-fractured confined water.11 inorganic samples for full chemistry analysis including 4 unconfined groundwater samples and 7 confined groundwater samples were collected,4 organic groundwater samples of confined water were also collected.The test results of groundwater samples showed that the chemistry type of unconfined groundwater was HCO3-Cl,and the chemistry type of confined groundwater was HCO3.The vale of Cl-、NO3-、NO2-、Mn2＋、NH4＋、TDS、Total hardness in unconfined water were all exceed the limit value,where only the value of Mn2＋、NH4＋ were exceed the limit value.Therefore,the water quality of unconfined water has been polluted by human activities,and the water quality of confined water were much better than unconfined water.Although the organic pollutants of groundwater were not exceed the limit value of drinking water standard,but the pollutant of ＂666＂ were tested from confined groundwater showed that the human activity has influenced the confined groundwater quality.