title: Degradation and transformation of atrazine under catalyzed ozonation process with TiO2 as catalyst.
abstract: Degradation of atrazine by heterogeneously catalyzed ozonation was carried out with TiO2 in the form of rutile as the catalyst. Some experimental factors such as catalyst dose, ozone dose and initial concentration of atrazine were investigated for their influence on catalyzed ozonation process. Although atrazine was effectively removed from aqueous solution by catalyzed ozonation process, the mineralization degree only reached 56% at the experimental conditions. Five transformation products were identified by GC/MS analysis. The degradation of atrazine involved de-alkylation, de-chlorination and de-amination. Diaminotriazine and 5-azauracil were the de-chlorinated and de-aminated products, respectively. The evolution of concentration of transformation products during catalyzed ozonation process was compared with uncatalyzed ozonation to show the degradation pathway. Toxicity tests based on the inhibition of the luminescence emitted by Vibrio fisheri indicated the detoxification of atrazine by catalyzed ozonation.
authors.affiliation: School of Resources and Materials, Qinhuangdao District of Northeastern University, Qinhuangdao 066004, China; Research Centre for Process Pollution Control and Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: young_wst@163.com.
authors.forename: Yixin
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Research Centre for Process Pollution Control and Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: hbcao@home.ipe.ac.cn.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Cao
authors.affiliation: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China. Electronic address: paipeng2013@163.com.
authors.forename: Pai
authors.initials: P
authors.lastname: Peng
authors.affiliation: College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China. Electronic address: bhm2009jy@163.com.
authors.forename: Hongmiao
authors.initials: H
authors.lastname: Bo
mesh_terms: D048908:Aliivibrio fischeri / Q000737:chemistry / Q000378:metabolism; D001280:Atrazine / Q000737:chemistry*; D001673:Biodegradation, Environmental; D002384:Catalysis; D006540:Herbicides / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects
chemical_list: D006540:Herbicides; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D010126:Ozone; D014025:Titanium; D001280:Atrazine
keywords: Atrazine; Catalyzed ozonation; Ozone; TiO(2); Transformation products