磺胺甲口恶唑氯化消毒副产物生成势及影响因素研究

Formation Potential and Influence Factors of Chlorination Disinfection By-products of Sulfamethoxazole

研究了东太湖水源水中典型抗生素磺胺甲口恶唑(SMX)氯化消毒副产物(DBPs)生成势及影响因素。结果表明:SMX经氯化反应后可生成三卤甲烷、卤乙腈、卤乙酸、卤乙醛、卤代丙酮等多种DBPs,且加氯量、反应时间、反应温度、pH值等因素均会影响其DBPs生成势。当溶液中存在溴离子时,SMX氯化生成的三卤甲烷、卤乙酸的组分及生成量有较大变化,且随着溴离子浓度的增大,一些氯代消毒副产物(Cl-DBPs)会转化为具有更高毒性的溴代消毒副产物(Br-DBPs)。

The fomiation potential and influence factors of sulfamethoxazole ( SMX) chlorination disinfection by-products ( DBPs) in the source water of East Tai Lake were studied. The results showed that the sulfamethoxazole was tran sformed into trihalomethanes( THMs), haloacetonitrile, haloacetic acid (HAAs), halogenated acetaldehyde, halogenated actone and other DBPs. The formation potential of DBPs was influenced by the chlorine dosage, reaction time, reaction temperature, pH value and other factors. The composition and the amount of THMs and HAAs produced by SMX chlorination changed substantially when bromine ions existed in solution. Additionally, it was discovered that a variety of chlorinated DBPs ( Cl-DBPs) were transformed into more poisonous brominated DBPs ( Br-DBPs) when the bromine ions concentration was increased.