化学预氧化对苏氨酸生成三氯乙醛的影响  

Influence of Chemical Pre-oxidation on Chloral Hydrate Formation of Threonine

作　　者：蔡广强[1] 傅学敏[2] 刘丽君[1] 卢小艳[1] 张金松[1,2] 刘嘉祺[1] 曲莹[1] 

机构地区：[1]深圳市水务(集团)有限公司,深圳518031 [2]哈尔滨工业大学深圳研究生院,深圳518055

出　　处：《环境科学》2016年第7期2586-2590,共5页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07406-004)

摘　　要：以具有最大比三氯乙醛生成潜能(SCHFP)的苏氨酸为研究对象,分析了次氯酸钠(NaClO)、二氧化氯(ClO_2)、高锰酸钾(KMnO_4)、过氧化氢(H_2O_2)、臭氧(O_3)和臭氧过氧化氢(O_3/H_2O_2)等预氧化剂对三氯乙醛(CH)生成的影响,以确定合适的预氧化剂及其适宜投加量,为CH的控制提供指导.结果表明,能够有效去除一天CH生成量(CH1d)的预氧化方式依次为H_2O_2、ClO_2、KMnO_4和NaClO,适宜投加量分别为3、0.5、0.6和0.5mg·L-1,对CH1d相应的去除率分别为61.54%、47.63%、29.77%和10.94%;能够有效去除CH生成潜能(CHFP)的预氧化方式依次为KMnO_4、NaClO、H_2O_2和ClO_2,适宜投加量分别为0.6、0.5、3和0.5mg·L^(-1),对CHFP相应的去除率分别为41.01%、33.38%、8.36%和2.40%;O_3和O_3/H_2O_2预氧化能够使CH1d和CHFP增加,不适用于对CH的控制.The influences of different chemical pre-oxidants,including sodium hypochlorite（ NaClO）,chlorine dioxide（ ClO_2）,permanganate（ KMnO_4）,hydrogen peroxide（ H_2O_2）,ozone（ O_3） and ozone/hydrogen peroxide（ O_3/ H_2O_2）,on chloral hydrate（ CH） formation were studied for threonine that has the highest special chloral hydrate formation potential（ SCHFP）. Suitable preoxidants and corresponding optimal doses were determined to provide guidance for controlling chloral hydrate（ CH） formation during drinking water treatment. The results indicated that the pre-oxidants that could decrease CH formation for one day incubation time（ CH1d） were H_2O_2,ClO_2,KMnO_4 and NaClO,and the corresponding suitable doses were 3,0. 5,0. 6 and 0. 5 mg·L^（-1）,and the corresponding CH1 dremoval rates were 61. 54%,47. 63%,29. 77% and 10. 94%,respectively. The pre-oxidants that could decrease CH formation potential（ CHFP） were KMnO_4,NaClO,H_2O_2 and ClO_2,and the corresponding suitable doses were 0. 6 mg·L^（-1）,0. 5mg·L^（-1）,3 mg·L^（-1） and 0. 5 mg·L- 1,and the corresponding CHFP removal rates were 41. 01%,33. 38%,8. 36% and 2. 40%,respectively. In addition,O_3 and O_3/ H_2O_2 were not suitable for controlling CH in the conventional treatment process because they could increase CH1 dand CHFP.

关 键 词：化学预氧化 前体物 苏氨酸 消毒副产物 三氯乙醛 

分 类 号：X131.2[环境科学与工程—环境科学]