Chemical Change of Pesticides Used for Golf Links in Chlorinated Water.

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  • 塩素処理水中のゴルフ場使用農薬の分解

Abstract

It is obliged in Japan to monitor the pollution of tap water for 30 pesticides used in golf links. Chemical changes of these pesticides in aqueous chlorine were individually investigated by HPLC, under conditions of 1μg/ml chlorine and at room temperature in dark. Presuming the reaction between pesticides and chlorine to be a pseudo-first-order one, the decomposition rate and the half-life of individual pesticide were calculated.<BR>A great difference in the decomposition rates was observed, and these pesticides were classified into 5 groups according to their rates. The amounts of chlorine consumed per 1 molar pesticide for 3 organophosphorus ones and thiram, all belonging to the group of immediate decomposition, were 5, 7, 3, and 30 moler, respectively. The resulting products from these organophosphorus pesticides were poisonous P=O type substances.<BR>These results on the decomposition of pesticides by chlorine were supported by the estimation of data which Ministry of Health and Welfare of Japan announced on the detection of 30 pesticides both in raw and tap waters.

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