[期刊论文][Full-length article]

出版年：2018

In the Pearl River Delta area, the upstream municipal wastewater is commonly discharged into rivers which are a pivotal source of downstream drinking water. Solar irradiation transforms some of the dissolved organic matter discharged from the wastewater, also affecting the formation of disinfection by-products in subsequent drinking water treatment plants. The effect of simulated solar radiation on soluble microbial products extracted from activated sludge was documented in laboratory experiments. Irradiation was found to degrade macromolecules in the effluent, yielding smaller, more reactive intermediate species which reacted with chlorine or chloramine to form higher levels of noxious disinfection by-products. The soluble microbial products were found to be more active in formation of disinfection by-products regard than naturally-occurring organic matter. The results show that solar irradiation induced the formation of more trihalomethane (THMs), chloral hydrate (CH) and trichloronitromethane (TCNM), causing greater health risks for downstream drinking water. Copyright © 2018 Elsevier Ltd. All rights reserved.

Solar irradiation ; Soluble microbial products ; Natural organic matter ; Disinfection by-product formation ; Sequential disinfection ; ; DOM Disolved organic matter ; ; SMPs Soluble microbial products ; ; UAP Utilization-associated product ; ; BAP Biomass-associated product ; ; SRNOM Suwannee River natural organic matter ; ; DBP Disinfection by-product ; ; THM Trihalomethane ; ; CH Chloralhydrate ; ; HAN Haloacetonitrile ; ; DCAN Dichloroacetonitrile ; ; TCNM Trichloronitromethane ; ; HAcAm Haloacetamide ; ; DCAcAm Dichloroacetamide ; ; TCAcAm Trichloroacetamide ; ; DOC Dissolved organic carbon ; ; SUVA254 Specific UV absorbance at 254 nm ; ; EEM Excitation-emission matrix ; ; PARAFAC Parallel factor ; ; FTIR Fourier transform infrared spectrometry ; ; SEC Size exclusion chromatography ; ; MW