摘要
目前我国现行的地下水中有机物的采样方法和测定方法,虽然在监测井的建设阶段考虑了高密度非水相液体(DNAPL)或低密度非水相液体(LNAPL)存在的情况,但仍然只适用于没有DNAPL或LNAPL的情形。采用水相和非水相分别采样、检测的方法,可以有效地避免现有方法的不足。对于一个存在LNAPL的地下水监测井,分层采样,分别检测水相、非水相中的苯、甲苯、乙苯、二甲苯和氯苯的质量浓度,折算到水相中后,地下水样品中苯的质量浓度为5.94×10^(5)μg/L,约为水相实际质量浓度的3318倍。通过数据比较,说明采用该法进行检测,能更真实地反映地下水的污染情况。
At present,sampling and measurement methods of organic compounds in groundwater in our country has considered existence of dense non-aqueous phase liquids(DNAPL)or light non-aqueous phase liquids(LNAPL)in the construction of monitoring wells,but they are actually only suitable for situations without DNAPL or LNAPL.The research adopts the method of sampling and detecting the water phase and the non-aqueous phase separately,which can effectively avoid the deficiencies of the existing methods.For a groundwater monitoring well with LNAPL,layered sampling is performed to detect the mass concentrations of benzene,toluene,ethylbenzene,xylene,and chlorobenzene in the water phase and the non-aqueous phase.After conversed to the water phase,the mass concentration of benzene is 5.94×10^(5)μg/L,which is about 3318 times the actual concentration of the water phase.Through data comparison,it is shown that the method can more truly reflect the pollution of groundwater.
出处
《上海化工》
CAS
2021年第4期40-44,共5页
Shanghai Chemical Industry
关键词
挥发性有机物
非水相液体
地下水
Volatile organic compounds
Non-aqueous phase liquids
Groundwater
作者简介
熊相群,女,1975年生,本科,工程师,主要从事土壤、水质等环保检测分析工作。
