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Removal of Herbicide Molinate during treatment Processes for Drinking Water  

Park, Ju-Hwang (Department of Agricltural Chemistry, Kyungpook National University)
Park, Jong-Woo (Department of Agricltural Chemistry, Kyungpook National University)
Kim, Jong-Soo (Department of Agricltural Chemistry, Kyungpook National University)
Kim, Jang-Eok (Department of Agricltural Chemistry, Kyungpook National University)
Publication Information
Applied Biological Chemistry / v.45, no.3, 2002 , pp. 145-151 More about this Journal
Abstract
Molinate, a thiolcarbamate herbicide widely used for control weeds in paddy soil, has been suspected for a possibile transportation into surface water due to its relatively high solubility in water. This study was performed to know that how much molinate could be removed during treatment processes for drinking water. The removal effciency of molinate in water was negligible in treatment process of polyaluminium chloride for coagulation. Molinate was gradually decreased up to 60.2% during contact time of 4 hours when chloride, an disinfectant used in water treatment system was treated. And in an hour treatment of ozone, molinate removal ranged $28.9%{\sim}58%$ However by treatment system of granular activated carbon, molinate was removed 93.9 to 100% at all concentrations used with a range of concentrations of granular activated carbon treated. The removal effciency of whole system simulated with removal efficiencies of molinate in each step of treatment processes was 99.5%. Therefore, if molinate happen to come into water treatment facilities, it could be removed effectively through the treatment processes.
Keywords
molinate; drinking water treatment; coagulation; chloride treatment; ozone; activated carbon;
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