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纳滤工艺去除水中微量内分泌干扰物

Keywords: 纳滤,邻苯二甲酸酯,乐果,莠去津,处理效能

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Abstract:

主要研究了DL1210型纳滤膜去除水中邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)、乐果和莠去津的影响因素,考察了温度、pH值、初始浓度、跨膜压力(TMP)和运行时间对膜通量和截留率的影响。结果表明,纳滤工艺是去除水中微量DBP、DEHP、乐果和莠去津的有效方法,初始pH值和温度的升高会导致纳滤膜对DBP、DEHP、乐果和莠去津的截留率的降低,膜对DBP和DEHP的截留率随初始浓度的升高而降低,TMP和运行时间不会对膜通量和目标污染物的截留率造成显著影响。当初始pH为5、初始浓度为5μg/L、温度为5℃、TMP为0.4MPa时,纳滤工艺对DBP、DEHP、乐果和莠去津的截留率达到最佳,分别为91.8%、89.8%、98.02%和77.6%,出水中DBP、DEHP、乐果和莠去津浓度分别为0.41、0.49、0.099和1.12μg/L。

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