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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Chuang, Yi-Hsueh Tung, Hsin-Hsin |
| Description | Author Affiliation: Chuang YH ( Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617 Taiwan.); Tung HH ( Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617 Taiwan. Electronic address: htung@ntu.edu.tw.) |
| Abstract | During the chloramination of natural waters, both chloramines and dissolved organic nitrogen (DON) can serve as nitrogen sources for the formation of trichloronitromethane (TCNM) and dichloroacetonitrile (DCAN). The present study investigated the formation kinetics and precursor characteristics of TCNM and DCAN. (15)N-Isotopic monochloramination of the organic fractions produced both (15)N- and (14)N-DCAN and TCNM. Nitrogenous disinfection byproduct (N-DBP) formation, in which the nitrogen precursor originated from DON ((14)N-DCAN and (14)N-TCNM), followed a second-order reaction kinetics (k=3.2×10(-5) to 9.4×10(-5)µM(-1)h(-1)). The formation of N-DBP where the nitrogen atoms originated from chloramines (e.g. (15)N-DCAN and (15)N-TCNM) correlated linearly with chloramine exposure. The discrepancy in formation kinetics results in that the (14)N-DCAN concentrations were two to ten times higher than (15)N-DCAN in the beginning of the reaction (<12h). Possible rate equations are proposed in this study. The results of a model compound study support the results of the chloramination of natural waters. In addition, 4-hydroxybenzaldehyde, an oxidative product commonly found during chlorination/chloramination of natural organic matters, gave a 10-fold greater yield of DCAN than that produced from tyrosine; 4-hydroxybenzaldehyde is thus an important precursor in DCAN formation by chloramine incorporation during the chloramination of natural waters. |
| ISSN | 03043894 |
| Volume Number | 283 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-01-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Acetonitriles Analysis Environmental Monitoring Hydrocarbons, Chlorinated Water Pollutants, Chemical Disinfection Kinetics Water Purification Methods Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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