Improved DBP elimination from swimming pool water by continuous combined UV and ozone treatment
Autor: | Kamilla Marie Speht Kaarsholm, Waqas Akram Cheema, Henrik Rasmus Andersen |
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Rok vydání: | 2018 |
Předmět: |
Environmental Engineering
Ozone Disinfectant 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification chemistry.chemical_compound Trihalomethane Swimming Pools SDG 3 - Good Health and Well-being Dissolved organic carbon Chlorine polycyclic compounds Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Chloramine Ecological Modeling Photodissociation Chloramines Pollution 020801 environmental engineering UV Swimming pool Disinfection chemistry Environmental chemistry Water quality Water Pollutants Chemical Disinfected by-products Disinfectants |
Zdroj: | Cheema, W A, Andersen, H R & Speht Kaarsholm, K M 2018, ' Improved DBP elimination from swimming pool water by continuous combined UV and ozone treatment ', Water Research, vol. 147, pp. 214-222 . https://doi.org/10.1016/j.watres.2018.09.030 |
ISSN: | 1879-2448 |
Popis: | Chlorine is the most frequently used disinfectant and oxidant for maintaining swimming pool water quality; however, it reacts continuously with dissolved organic matter to produce disinfection by-products (DBPs), which are a health risk for pool users. UV treatment is used widely to remove chloramines, which are the most prevalent group of DBPs, albeit chloro-organic DBP concentrations often increase during post-UV chlorination.In this work, UV and ozone treatments were investigated as additional technologies to eliminate DBP formation and their precursors. Batch experiments were conducted under controlled conditions, using realistic UV and ozone dosages and real pool water samples collected from a public swimming pool.A gradual increase in all investigated DBP concentrations and predicted toxicity was observed during chlorination after repeated UV treatments, and concentrations of certain DBPs also increased during post-ozone chlorination. Based on ozone and chlorine’s similar reactivity, ozone was used directly after UV treatment to decrease the induction of DBP formation. Most DBP concentrations decreased during repeated combined treatments. It was also observed that DBP formed by post-ozone chlorination was removed by photolysis, thereby indicating synergy between the treatments. Repeated treatments using realistic UV and ozone dosages predicted that water quality will improve as a result of continuous combined UV and ozone treatments. |
Databáze: | OpenAIRE |
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