期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2001

27

2

130-133

10.3321/j.issn:1007-1032.2001.02.015

本校为第一机构

为了探明紫外光和光氧化剂对卤烃光降解的影响，以H2O2和H2O2/草酸铁络合物为光氧化剂，研究了紫外光对氯仿、三氯乙烯和四氯乙烯的降解．结果表明，紫外光、紫外光/H2O2体系能有效地加速水溶液中三氯乙烯和四氯乙烯的光降解，但不能降解氯仿；而紫外光/ H2O2/草酸铁或紫外光/草酸铁络合物体系能有效地使水溶液中氯仿、三氯乙烯和四氯乙烯烃迅速光解脱氯；溶液pH值对卤烃光解有显著影响，pH值为2.5～3.5时光解速率最快．随着H2O2质量浓度的增加，卤烃光解速率提高，但H2O2增大到一定质量浓度时，其脱氯量反而降低．

The photo degradation of chloroform, trichloroethylene and tetrachloroethylene by H 2O 2 and H 2O 2 ferrioxalate complexes as photo oxidants under irradiation of UV was compared. The results show that the photodegradation of two kinds of chloroethylene in aqueous solution by UV, UV/ H 2O 2 is very effective;the photodegradation of chloroform by the photo oxidants is not obvious;the photodegradation of three kinds of chloronated hydrocarbons by UV/ H 2O 2 /ferrioxalate or UV/ferrioxalate complexes is very significant. pH has significant effects on the photo degradation of halogenated hydrocarbo...