title: Hydrolysis kinetics of atrazine and influence factors.
abstract: The hydrolysis kinetics of atrazine in distilled water and leaching water from soil, and their influence factors were studied by incubation at 35 degrees C and HPLC analysis method. 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 1.606 x 10(-3)/d and 1.055 x 10(-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 2.431 x 10(-3)/d and 1.498 x 10(-3)/d respectively which were 2.3 and 1.42 times of control (1.055 x 10(-3)/d); anion NO3- can inhibit catalysis of humic acid to atrazine hydrolysis.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors.forename: Z F
authors.initials: ZF
authors.lastname: Lei
authors.forename: C M
authors.initials: CM
authors.lastname: Ye
authors.forename: X J
authors.initials: XJ
authors.lastname: Wang
mesh_terms: D001280:Atrazine / Q000737:chemistry*; D002681:China; D004591:Electrophoresis, Polyacrylamide Gel; D006540:Herbicides / Q000737:chemistry*; D006812:Humic Substances / Q000737:chemistry; D006868:Hydrolysis; D007700:Kinetics; D009566:Nitrates / Q000737:chemistry; D019810:Sodium Azide / Q000737:chemistry; D012989:Soil Pollutants; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D006540:Herbicides; D006812:Humic Substances; D009566:Nitrates; D012989:Soil Pollutants; D013501:Surface-Active Agents; D019810:Sodium Azide; D001280:Atrazine; C006568:ammonium nitrate