Chlorine inactivation of Tubifex tubifex in drinking water and the synergistic effect of sequential inactivation with UV irradiation and chlorine
Autor: | Li Zhihong, He Panpan, Xu Chao, Xiao-Bao Nie, Yuan-Nan Long |
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Rok vydání: | 2017 |
Předmět: |
Environmental Engineering
Ultraviolet Rays Health Toxicology and Mutagenesis Disinfectant 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification chemistry.chemical_compound Nephelometry and Turbidimetry Water Quality polycyclic compounds Chlorine Animals Environmental Chemistry Oligochaeta Turbidity 0105 earth and related environmental sciences Biological Oxygen Demand Analysis biology Chemistry Drinking Water Chemical oxygen demand Temperature Public Health Environmental and Occupational Health General Medicine General Chemistry Hydrogen-Ion Concentration Contamination biology.organism_classification Pollution Tubifex 020801 environmental engineering Disinfection Kinetics Potassium permanganate Environmental chemistry Tubifex tubifex Disinfectants |
Zdroj: | Chemosphere. 177:7-14 |
ISSN: | 0045-6535 |
Popis: | The inactivation of Tubifex tubifex is important to prevent contamination of drinking water. Chlorine is a widely-used disinfectant and the key factor in the inactivation of T. tubifex. This study investigated the inactivation kinetics of chlorine on T. tubifex and the synergistic effect of the sequential use of chlorine and UV irradiation. The experimental results indicated that the Ct (concentration × timereaction) concept could be used to evaluate the inactivation kinetics of T. tubifex with chlorine, thus allowing for the use of a simpler Ct approach for the assessment of T. tubifex chlorine inactivation requirements. The inactivation kinetics of T. tubifex by chlorine was found to be well-fitted to a delayed pseudo first-order Chick-Watson expression. Sequential experiments revealed that UV irradiation and chlorine worked synergistically to effectively inactivate T. tubifex as a result of the decreased activation energy, Ea, induced by primary UV irradiation. Furthermore, the inactivation effectiveness of T. tubifex by chlorine was found to be affected by several drinking water quality parameters including pH, turbidity, and chemical oxygen demand with potassium permanganate (CODMn) concentration. High pH exhibited pronounced inactivation effectiveness and the decrease in turbidity and CODMn concentrations contributed to the inactivation of T. tubifex. |
Databáze: | OpenAIRE |
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