摘要
以４００Ｗ高压汞灯为紫外光源，Ｈ２Ｏ２－草酸铁络合物为光氧化剂，对氯仿水溶液进行了光降解反应实验研究．结果表明，ＵＶ／Ｈ２Ｏ２草酸铁络合物体系能有效地使水溶液中氧仿迅速光解脱氯；在等摩尔系列溶液中,Ｆｅ３＋／草酸根的摩尔比为１：３时，氯仿光解效果最好：溶液ｐＨ值对氯仿光解有显著影响，ｐＨ值在３－４时光解速率最快；随着Ｈ２ｏ２浓度的增加，氯仿大解速率提高，但Ｈ２Ｏ２浓度较大时，Ｈ２Ｏ２的有效利用率降低；温度对氯仿光解反应有一定影响，反应的表观活化能为７．６ｋＪ／ｍｏｌ.
The photodegradation of chloroform in aqueous solution by H2O2-ferrioxalate complexes as a photo-oxidantunder irradiation of high pressure mereury lamp as UV light source was studied. The results indicate that the degradationof chloroform in UV/H2O2/ferrioxalate complexes is very effective and rapid. A series of iso-mole solutions were investigated and verified that the significant photodegradation of chloroform was achieved with the mole ratio of Fe(Ⅲ) tooxalate being 1:3, pH having significant effect on dechlorination and the rate of degradation being fast at pH 3-4. Therate of destruction of chloroform increased with increasing concentration of H2O2, but the effect decreased at high levelof H2O2. The temperature had a little effect on reaction. The apparent activation energy of the photochemical reaction was7.6KJ/mol.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
1999年第6期526-529,共4页
China Environmental Science
基金
湖北省教委科学研究计划!97C046
