Corrigendum to "Risk assessment on disinfection by-products of drinking water of different water sources and disinfection processes" (vol 33, pg 219, 2007)

Institute of Geographic Sciences and Natural Resources Research, CAS Beijing 100101, China.
Environment International (Impact Factor: 5.66). 03/2007; 33(2):219-25. DOI: 10.1016/j.envint.2006.09.009
Source: PubMed

ABSTRACT The occurrences of trihalomethanes (THMs) and haloacetics (HAAs) in the water supply in Beijing and Canada were investigated. The concentrations of THMs and HAAs in Beijing and Canada were below the maximum contaminant levels specified by the USEPA and WHO standards. The multi-pathway risk assessment (assessed through oral ingestion, dermal absorption and inhalation exposure to drinking water) was used to assess the cancer risk and the hazard index of THMs and HAAs from fifteen waterworks in Beijing, China and three treatment plants using different disinfection processes in Canada. Residents in Beijing and residents who were served by three treatment plants using different disinfection processes in Canada had a higher risk of cancer through oral ingestion than through the other two pathways. The cancer risk resulted from disinfection by-products (DBPs) was 8.50E-05(for males), 9.25E-05(for females) in Beijing, China, while it was 1.18E-04, 1.44E-04 in Canada. The risk was higher when water treatment plants used surface water source than when they used ground water source and mixture water source in Beijing. The risk showed different changes in three treatment plants using different disinfection processes in Canada. The lifetime cancer risk for THMs followed the order: Plant 2>Plant 1>Plant 3. And, the lifetime cancer risk for HAAs was: Plant 1>Plant 2>Plant 3.

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    ABSTRACT: Water disinfection is a necessary process for the control of the pathogenic micro-organisms. However, the use of chemical disinfectants leads to the formation of disinfection by-products (DBPs). While the pathogenic micro-organisms are the primary cause of human health risk from water, DBPs also provide an unintended health hazard. Chlorination, chloramination, ozonation, and ultraviolet system are the most common methods used for drinking water and wastewater treatment. However, trihalomethanes (THMs), halogenic acetic acids, haloacetonitrils (HAN), halo-aldehydes and haloketons consist mainly of DBPs. Different types of DBPs are formed depending on a number of significant factors related to the selected method. The overall purpose of this paper was to analyze several disinfection method and compare the results of each one.
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