Investigation of Endocrine Disrupting Chemicals in Source Water and Tap Water in a City / 环境与健康杂志

ABSTRACT

Objective To investigate the endocrine disrupting chemicals contamination in source water and tap water in a city and to provide the scientific data for the water quality inspection,management and water treatment.Methods Fifteen samples of source water and tap water were collected in April,2006 and February,2007.Extraction of potential EDCs from samples was performed in columns packed with XAD-4 resins by using solid-phase extraction(SPE).Each sample was dried under a gentle air stream for 1 h and eluted with a mixture of acetone(20 ml) and dichloromethane(40 ml) for 3 times.The extracts were collected into a glass flask,evaporated under a gentle air stream and suspended again in 0.5 ml dichloromethane.Gas chromatography-mass spectrometry(GC-MS) was used for quantitative or qualitative analysis of the organic pollutants and the optimum conditions were determined.Results Seventy-eight organic pollutants were identified from the water samples.Most of them were phthalates,hydrocarbon,phenol,and benzene.Phthalates were found in all samples.Among them,bis(2-ethylhexyl) phthalate(CAS# 117817),di-n-butyl phthalate(CAS# 84742),and pentachlorophenol(CAS# 87865) were regarded as suspected endocrine disrupting chemicals.The concentration of bis-(2-ethylhexyl) phthalate and di-n-butyl phthalate ranged 0.004 75-4.450 ?g/L and 0.002 25-2.39 ?g/L,respectively.The concentration of pentachlorophenol was 0.727 ?g/L.Conclusion The source water and tap water in this city has been seriously polluted by organic pollutants,the main endocrine disrupting chemicals detected in the present investigation are phthalates and pentachlorophenol and the related health effects remain to be studied.