Identification of TiO2/UV Disinfection Byproducts in Drinking Water

详细信息    查看全文

• 作者：Susan D. Richardson ; Alfred D. Thruston ; Jr. ; Timothy W. Collette ; Kathleen S. Patterson ; Benjamin W. Lykins ; Jr. ; and John C. Ireland
• 刊名：Environmental Science & Technology
• 出版年：1996
• 出版时间：November 1996
• 年：1996
• 卷：30
• 期：11
• 页码：3327 - 3334
• 全文大小：322K
• 年卷期：v.30,no.11(November 1996)
• ISSN：1520-5851

文摘

Due to concern over the presence of trihalomethanes(THMs) and other chlorinated byproducts inchlorinated drinking water, alternative disinfectionmethods are being explored. One of the alternativetreatment methods currently being evaluated forpotential use with small systems (less than 3300 people)is titanium dioxide (TiO₂) photocatalysis. Usingacombination of unconventional GC/MS and GC/FT-IRtechniques, we identified organic disinfectionbyproducts (DBPs) formed by photocatalytic treatmentof water with TiO₂ and ultraviolet (UV) light.Theidentifications also reflect the effects ofultrafiltrationprior to treatment with TiO₂/UV as well assecondarychlorination. Only a single organic DBP (tentativelyidentified as 3-methyl-2,4-hexanedione) was observed in ultrafiltered raw water treated withTiO₂/UV alone. When chlorine was used as a secondarydisinfectant (following treatment with TiO₂/UV),severalchlorinated and brominated DBPs were formed,among them some halomethanes and several halonitriles.Most of these halogenated DBPs were the sameas those observed when chlorine was used as the soledisinfectant. However, one byproduct, tentativelyidentified as dihydro-4,5-dichloro-2(3H)furanone,wasformed only by a combination of TiO₂/UV andchlorinedisinfection. Although many chlorinated DBPs wereproduced when chlorine was used as a secondarydisinfectant, the number and concentration of thesechlorinated DBPs were lower than when chlorinewas used as the sole disinfectant.