%0 Journal Article
%T Hydrolysis of l-(2-chlorobenzoy|)-3-(4-chlorophenyl) urea in aquatic system
%A Yang Kewu
%A Mo Hanhong
%A xu Xiaobai
%A Dai Guangmao
%J 环境科学学报(英文版)
%D 1992
%I 
%X The degradation of the insect growth regulator 1-(2-chlorobenzoyl)-3-(4-chlorophenyl)urea (CCU)was studied both in distilled water and in buffer solution．The experimental results indicated that CCU is not stable in aqueous solution and easily decomposes in alkaline water．At pH 6 and pH 10，the half lives (Tv2)of hydrolysis arc about 9 days and 2 days，respectively．The rate of hydrolysis increases as either the concentration of alkalinity or temperature increases．At NaOH]=0.01865 mol/L，with every lOoC increase in temperature，the reaction rate increases about 3 times．the activation energy for hydrolysis is 7l.56 kJ/mol．Basic catalyzed degradation of CCU at levels greatly above its solubility in water resulted in rapid degradation to as many as four identified products：(4-chlorophenyl)urea，2-chlorobenzoic acid，2-chlorobenzamide，and 4-chloroaniline．The major products were(4-chlorophenyl)urea and 2-chlorobenzoic acid．
%K hydrolysts
%K degradation
%K pesticide
%K l-(2-chlorobenzoyl)-3-(4-chlorophenyl)urea．
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=93B7DDD573C4627F83BDC4ADEF6B657C&yid=F53A2717BDB04D52&vid=E158A972A605785F&iid=E158A972A605785F&sid=F3090AE9B60B7ED1&eid=7801E6FC5AE9020C&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=0