壬基酚聚氧乙烯醚(NPEOs)在净水厂中的监测

低浓度内分泌干扰物长期作用会对人体健康产生不可忽视的负面影响.较详细地研究了北方某给水厂现有净水处理工艺对低浓度NPEOs的控制特性,结果表明,该厂常规工艺单元(无预氯化)对NPEOs(聚合度n＝4～15)基本上没有去除作用,后续活性炭单元对NPEOs的去除作用也不是很明显,有待进一步研究.由于氯的强氧化作用的存在,加氯能明显降低水中的NPEOs浓度.

Monitoring of nonylphenol ethoxylates(NPEOs)in waterworks

Nonylphenol ethoxylates(NPEOs) is usually degradated to nonylphenol (NP)-- one kind of endocrine disrupting chemicals(EDCs) which are estrogenic and could do harm to hu man health even in very low concentrations for a long time. Results of research on a waterworks showed, conventional process was hardly of any help in removing NPEOs(n = 4-15), and effects of the following activated carbon unit were not stable and further study is needed about this and its specific mechanism. After chlorination before entering the distribution system, content of NPEOs decreased. It's because that chlorine is of strong oxidation and it can react with certain NPEOs (whose polymeric number is relatively higher), so they were degraded by chlorine into NPEOs of smaller polymeric number.