Hydrolysis kinetics of atrazine and influence factors

The hydrolysis kinetics of atrazine in distilled water and leaching water from soil, and their influence factors were studied by incubation at 35℃ and HPLC analysis method in this paper. The kinetic process of atrazine hydrolysis can be described by the first-order reaction law. The results showed that the hydrolysis rate constants k in leaching water and distilled water were 1.606x10-3/d and 1.055x10-3/d, respectively; the half-life of atrazine hydrolysis in distilled water at pH 3, pH 4.5 and pH 8 were 373 days, 522 days and 657 days respectively. The results also showed that the proton in reaction solution can catalyze the atrazine hydrolysis; humic acid and NH4+ etc. substances in aqueous solution can facilitate atrazine hydrolysis; rate constants of atrazine hydrolysis with humic acid and NH4NO3 were 2.431x10-3/d and 1.498x10-3/d respectively which were 2.3 and 1.42 times of control(1.055x10-3/d); anion NO3- can inhibit catalysis of humic acid to atrazine hydrolysis.

作 者： Lei Zhi-fang YE Chang-ming WANG Xing-jun   作者單位： Research Center for Eco-Environmental Sciences, chinese academy of Sciences,  刊 名： 環(huán)境科學(xué)學(xué)報(英文版)  ISTIC SCI 英文刊名： JOURNAL ENVIRONMENTAL SCIENCES  年，卷(期)： 2001 13(1)  分類號： X592  關(guān)鍵詞：  

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