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Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI
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Rezumat: Chlorination is the most widely disinfection process of drinking water in Romania. The goal of the water disinfection is to protect it in the distribution systems against microbial contamination and to prevent and control re-growth of microorganism in the distribution system. The presence of DBPs in drinking water is a matter of concern for human health and can also produce unpleasant organoleptic taste. Under Stage I of the Disinfectants/Disinfection By-products (D/DBP) Rule, USEPA sets maximum contaminant levels (MCLs) for total trihalomethanes (chloroform, bromodichloro¬methane, dibromochloromethane and bromoform) at 80 μg•L-1; for a total of five haloacetic acids (monochloroacetic, dichloroacetic, trichloroacetic, mono¬bromoacetic and dibromoacetic acids) at 60 μg•L-1; for bromate at 10 μg•L-1 and for chlorite 1.0 mg•L-1. Other DBPs have been added to the US Environmental Protection Agency’s Candidate Contamination List (CCL), which is the list from which future regulated drinking water compounds will be selected. In Europe, the 98/83/CEE Directive is less restrictive than that applied in the USA. The only DBPs that must be controlled are the four trihalomethanes, and their proposed maximum level being 100 μg l-1. Due to the fact that their identification and quantization have become extremely important to drinking water companies in order to reduce or remove their presence, other analytical methods different from those proposed by U.S. EPA have been optimized and are now commented in this article.
Keywords: disinfection by-products, gas chromatography-electron capture detector, headspace extraction.
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