Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/17193
ชื่อเรื่อง: Trihalomethanes in water supply system and water distribution networks
ผู้แต่ง: Sriboonnak S.
Induvesa P.
Wattanachira S.
Rakruam P.
Siyasukh A.
Pumas C.
Wongrueng A.
Khan E.
Keywords: concentration (composition)
disinfection
distribution system
humic acid
water supply
water treatment plant
Chiang Mai [Northern Region]
Northern Region [Thailand]
Thailand
trihalomethane
water
disinfection
water management
water pollutant
water supply
Disinfection
Trihalomethanes
Water
Water Pollutants, Chemical
Water Purification
Water Supply
วันที่เผยแพร่: 2021
บทคัดย่อ: The formation of trihalomethanes (THMs) in natural and treated water from water supply systems is an urgent research area due to the carcinogenic risk they pose. Seasonal effects and pH have captured interest as potential factors affecting THM formation in the water supply and distribution systems. We investigated THM occurrence in the water supply chain, including raw and treated water from water treatment plants (coagulation, sedimentation, sand filtration, ClO2-disinfection processes, and distribution pipelines) in the Chiang Mai municipality, particularly the educational institute area. The effects of two seasons, rainy (September–November 2019) and dry (December 2019–February 2020), acted as surrogates for the water quality profile and THM occurrence. The results showed that humic acid was the main aromatic and organic compound in all the water samples. In the raw water sample, we found a correlation between surrogate organic compounds, including SUVA and dissolved organic carbon (DOC) (R2 = 0.9878). Four species of THMs were detected, including chloroform, bromodichloromethane, dibromochloromethane, and bromoform. Chloroform was the dominant species among the THMs. The highest concentration of total THMs was 189.52 µg/L. The concentration of THMs tended to increase after chlorination when chlorine dioxide and organic compounds reacted in water. The effect of pH on the formation of TTHMs was also indicated during the study. TTHM concentrations trended lower with a pH ≤ 7 than with a pH ≥ 8 during the sampling periods. Finally, in terms of health concerns, the concentration of TTHMs was considered safe for consumption because it was below the standard (<1.0) of WHO’s Guideline Values (GVs). © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
URI: https://ir.swu.ac.th/jspui/handle/123456789/17193
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113570533&doi=10.3390%2fijerph18179066&partnerID=40&md5=f65af2a9d8316c598bdb42a6e7f354d8
ISSN: 16617827
Appears in Collections:Scopus 1983-2021

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