Abstract
Trihalomethanes (THMs) are byproducts of the process of disinfecting water with chlorine, in which, 4 compounds are most interested such as chloroform (CF), bromodichloromethane (BDCM), dibromochloromethane (DBCM) and bromoform (BF). These DBPs even at very low concentrations pose harmful health effects. These health risks may include cancers, reproductive disorders, birth defects and miscarriage. This study evaluates the 4 THMs in water supplied at 6 districts of Ho Chi Minh City and in swimming pool water at Tan Binh district. All samples were extracted by using liquid- liquid extraction method with n-hexane: diisopropylether (1:1) before analyzing by GC-ECD. The results showed that 4/4 THMs were found in water samples and 2/4 THMs (chloroform and bromodichloromethane) were found in swimming pool water samples. The results showed that there are differences in the THMs levels between sampling site. The average concentration of THMs in supplied water was 31.40 ±29.23 μg.L-1 (20 – 110 μg.L-1), in swimming pool water was 109.78 ± 15.21 μg.L-1 (90 – 140 μg.L-1). The sampling site which has the highest average concentration is Tan Phu district (102.45 ± 16.0 μg.L-1) and the lowest is district 1 (23.74 ± 1.92 μg.L-1). The results showed that the concentration of THMs in the supplied water and swimming pool water does not exceed the limit of national technical regulation on drinking water quality (QCVN 01: 2009/BYT), however, the chloroform concentration of some sampling sites exceeds the limit given by the Environmental Protection Agency (EPA).
Highlights
Trihalomethanes (THMs) are byproducts of pool water samples
The results showed that the process of disinfecting water with chlorine, in there are differences in the THMs levels between which, 4 compounds are most interested such as chloroform (CF), bromodichloromethane (BDCM), dibromochloromethane (DBCM) and bromoform (BF)
This study evaluates the 4 THMs in water supplied at concentration is Tan Phu district (102.45 ± 16.0 μg.L-1) and the lowest is district 1 (23.74 ± 1.92 μg.L-1)
Summary
Trihalomethane (THMs) là sản phẩm phụ nhau về nồng độ của các THMs trong mẫu nước. của quá trình khử trùng nước bằng chlorine , Cả 4 hợp chất THMs đều được phát hiện trong trong đó 4 hơpchất được quan tâm nhiều nhất tất cả các mẫu nước cấp , và chỉ có 2 hợp chất là: chloroform, bromodichloromethane, chloroform và bromodichloromethane được phát dibromochloromethane và bromoform. Trihalomethane (THMs) là sản phẩm phụ nhau về nồng độ của các THMs trong mẫu nước. Những rủi ro sứ c khỏe từ các hợp chất này bao gồm ung thư , rối loaṇ sinh của THMs trong mẫu nước cấp là 31,40 ± 29,23 μg.L-1 ( 20 – 110 μg.L-1), trong nước hồ bơi là 109,78 ± 15,21 μg.L-1 ( 90 – 140 μg.L-1). Nghiên cứu được có nồng độ THMs trung bình cao nhất là quận thực hiện nhằm xác định 4 hợp chất THMs trong Tân Phú và thấp nhất là quận 1. -hexane – của cơ quan bảo vệ môi trường của Mỹ (EPA)
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