饮用水中邻苯二甲酸酯的调查及去除研究

STUDY ON INVESTIGATION AND REMOVAL OF PHTHALATE ESTERS IN DRINKING WATER

采用固相萃取-高效液相色谱法调查了淮南市某自来水厂原水、各处理工艺单元出水中4种邻苯二甲酸酯(DMP、DEP、DBP、BBP)。结果表明,4种邻苯二甲酸酯在原水中均检出,质量浓度为0.010～0.142μg/L;DMP和DEP仅在部分水样中检出,在管网水中没有检出;DBP和BBP在各水样中均检出,质量浓度分别为1.702～2.897μg/L、0.248～0.676μg/L,说明现行常规净水处理工艺不能完全去除邻苯二甲酸酯,需要进行深度处理。研究采用臭氧氧化技术、活性炭吸附技术和臭氧-活性炭技术对该水厂原水中的2种邻苯二甲酸酯(DBP、BBP)去除情况进行验证。结果表明,臭氧氧化技术不能完全去除原水中的DBP和BBP,去除率为61%～65%;活性炭吸附技术能够完全去除原水中的DBP和BBP;臭氧-活性炭技术对原水中的DBP和BBP去除率达到100%。该技术可以作为水厂深度处理工艺去除DBP和BBP的主要单元。

Solid phase extraction-high performance liquid chromatography was used for simultaneously determination of 4 PAEs （DMP, DEP, DBP, BBP） in water samples taken from each treatment unit of a drinking water treatment plant located in Huainan. Results show that 4 of PAEs are detected in source water, the concentration is 0.010-0.142 μg/L; DMP and DEP are detected in some water samples, and not detected in the pipe network; DBP and BBP are detected in source water, the concentration are 1.702-2.897 μg/L and 0.248-0.676μg/L. Conventional drinking water treatment process can not remove PAEs efficiently, it need depth treatment. The technology of ozone oxidation, activated carbon adsorption and ozone-activated carbon was used for removal of verification of 2 PAEs （DBP, BBP） in raw water in this plant. Results show that the ozone oxidation technology ozone oxidation technology cannot remove DBP and BBP in the raw water completely, the removal rate is 61%-65%; The activated carbon adsorption technology can remove DBP and BBP in the raw water completely, the technology of ozone-activated carbon can remove DBP and BBP .completely, and the removal rate reached 100%. The results indicated that this technology can be used as the main unit in water depth treatment process to remove PAEs.