The Present Status Analysis And Degradation Study On The Endocrine Disruptors Di-n-butyl Phthalate, Nonylphenol And Bisphenol A In The Yellow River Water

Environmental endocrine disruptors(EEDs) are the mass in environment which can disturb the human or animal's endocrine system and cause abnormal effects.At the present time, the compounds which belong to the EEDs in environment approved directly or indirectly are more than seventy varieties. In this paper, the contents of di-n-butyl phthalate(DBP), nonylphenol(NP) and bisphenol A(BPA) in the tailwater, filtered water, depsitted water, raw water of Huyan water plant and the drinking water sample of Shanxi University have been determined by the method of gas chromatography-mass spectrometry (GC-MS) and gas chromatography (GC).The resultes indicated that the three chemicals present in all the water samples. The contents of DBP, NP and BPA were highest in the raw water and the least in the tail water, which indicated that the conventional water cleaning technology could remove DBP, NP and BPA from surface water in some extent. In the water sample of Shanxi University transmitted by pipes, the contents of DBP, NP and BPA were high. The content of NP was even higher than that in the raw water of Huyan water plant, which might be resulted from the pollution of water transmitted pipes.The water solution of DBP, NP and BPA made-up in the laboratory were processed by activated carbon and UV-light. The results indicated that activiated carbon could absorb DBP, NP and BPA effectively in these water. The result can be obtained by this test that the adsorption equilibrium time of DBP was about fifty minites, NP about thirty minites and BPA about twenty minites from the adsorption kinetics curves, which were very important in water processing. The saturated adsorptive capacity of DBP, NP and BPA to activated carbon was counted by their adsorption isoterms. It also been determined that the saturated adsorptive capacity of DBP was 7.027mg/g, NP 3.8mg/g and BPA 4.81mg/g, by which the quantity of activated carbon used in water processing can be obtained.UV-light was of no effect to DBP, NP and BPA in the water solution. Which might be for that free hydroxy almost couldn't be produced by UV-light in the absence of effective catalyst. So selecting the effective catalyst was the key in drinking water processing made by UV-light.