| 化学预氧化对苏氨酸生成三氯乙醛的影响 |
| 摘要点击 1269 全文点击 758 投稿时间：2015-11-30 修订日期：2016-01-15 |
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| 中文关键词 化学预氧化 前体物 苏氨酸 消毒副产物 三氯乙醛 |
| 英文关键词 chemical pre-oxidation precursor threonine disinfection by-products (DBPs) chloral hydrate (CH) |
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| 中文摘要 |
| 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(ClO2)、高锰酸钾(KMnO4)、过氧化氢(H2O2)、臭氧(O3)和臭氧过氧化氢(O3/H2O2)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H2O2、ClO2、KMnO4和NaClO,适宜投加量分别为3、0.5、0.6和0.5 mg·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KMnO4、NaClO、H2O2和ClO2,适宜投加量分别为0.6、0.5、3和0.5 mg·L-1,对CHFP相应的去除率分别为41.01%、33.38%、8.36%和2.40%; O3和O3/H2O2预氧化能够使CH1d和CHFP增加,不适用于对CH的控制. |
| 英文摘要 |
| The influences of different chemical pre-oxidants, including sodium hypochlorite (NaClO), chlorine dioxide (ClO2), permanganate (KMnO4), hydrogen peroxide (H2O2), ozone (O3) and ozone/hydrogen peroxide (O3/H2O2), on chloral hydrate (CH) formation were studied for threonine that has the highest special chloral hydrate formation potential (SCHFP). Suitable pre-oxidants 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 H2O2, ClO2, KMnO4 and NaClO, and the corresponding suitable doses were 3, 0.5, 0.6 and 0.5 mg·L-1, and the corresponding CH1d removal rates were 61.54%, 47.63%, 29.77% and 10.94%, respectively. The pre-oxidants that could decrease CH formation potential (CHFP) were KMnO4, NaClO, H2O2 and ClO2, and the corresponding suitable doses were 0.6 mg·L-1, 0.5 mg·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, O3 and O3/H2O2 were not suitable for controlling CH in the conventional treatment process because they could increase CH1d and CHFP. |
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