Algal organic matters transformation in UV/chlorine process and disinfection byproducts formation
The formation of disinfection by-products(DBPs)from the algal organic matter(AOM)in algae-containing water sources seriously threatens the safety of water supply.In this study,the formation potential of DBPs from typical AOM and representative protein component phycocyanin in the UV/chlorine treatment was systematically investigated,and the radical-mediated transformation pathway of phycocyanin was further analyzed.The results indicate that in comparison with chlorine alone treatment,the UV/chlorine treatment with 280 mJ·cm-2 UV dose and 6 mg·L-1 Cl2 dosage could significantly increase chloroform(TCM),dichloroacetonitrile(DCAN)and trichloronitromethane(TCNM)by 59.3％、160.7％and 143.6％,respectively,the same promotion effect also occurred for DBPs formation from phycocyanin,and DBPs formation was positively correlated with chlorine dosage and UV/chlorine reaction time.Compared with pH 6.0,the formation potentials of TCM and DCAN increased at pH 8.0.FT-ICR-MS data showed that lipids and lignins were dominant in phycocyanin and the most significant changes occurred in UV/chlorine treatment.Compared with chlorination alone,more chlorinated by-products were produced in the UV/chlorine treatment.Lipids and unsaturated hydrocarbons were important precursor structures of chlorination by-products.
国家科技期刊平台
NSTL
万方数据
