Chlorine decay and trihalomethane formation following ferrate(VI) preoxidation and chlorination of drinking water
| Autor: | Feilong Dong, Virender K. Sharma, Feng Luo, Guilin He, Tuqiao Zhang, Leslie Cizmas, Jingguo Zhao, Cong Li |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Halogenation Iron Health Toxicology and Mutagenesis 0208 environmental biotechnology Dibromochloromethane Inorganic chemistry chemistry.chemical_element Portable water purification 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification chemistry.chemical_compound Reaction rate constant polycyclic compounds Chlorine Environmental Chemistry 0105 earth and related environmental sciences Chloroform Drinking Water Public Health Environmental and Occupational Health General Medicine General Chemistry Oxidants Pollution 020801 environmental engineering Disinfection Kinetics Trihalomethane chemistry Water treatment Ferrate(VI) Trihalomethanes |
| Zdroj: | Chemosphere. 187:413-420 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2017.08.084 |
| Popis: | This paper presents the effect of preoxidation with ferrate(VI) (FeVIO42-, Fe(VI)) prior to chlorination on chlorine decay and formation of disinfection by-products in filtered raw water from a full-scale drinking water treatment plant. The rate of chlorine decay became significantly faster as the concentration of ferrate(VI) increased. Chlorine degradation followed two first-order decay reactions with rate constants k1 and k2 for fast and slow decay, respectively. Kinetic modeling established the relationships between k1 and k2 and varying dosages of chlorine and ferrate(VI). When ferrate(VI) was used as a pre-oxidant, the levels of trihalomethanes (trichloromethane (TCM), dichlorobromomethane (DCBM), dibromochloromethane (DBCM), and tribromomethane (TBM)) in water samples decreased as the ferrate(VI) concentration increased. The concentrations of these trihalomethanes followed the order TCM > DCBM ≈ DBCM > TBM. |
| Databáze: | OpenAIRE |
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