Abstract：The catalytic properties of octaethylporphyrin and tetraphenylporphyrin manganese complexes on degradation of DDT were examined by cyclic voltammetry and UV-visible spectroelectrochemistry in DMF. No catalytic reaction was observed for DDT by neutral and first reduced manganese porphyrins, but both doubly and triply reduced complexes can catalyze the degradation of DDT. The electroreductive de-gradation of DDT was performed by using a technique of controlledpotential electrolysis and manganese porphyrins as the electrocatalysts. The products of DDT degradation were analyzed and characterized by the GC-MS technique. The main products of DDT degradation are DDD (1,1-bis(4-chlorophenyl)-2,2-dichloroethane), DDE (1,1-bis(4-chlorophenyl)-2,2-dichloroethylene) and DDMU (1,1-bis(4-chlorophenyl)-2-chloroethylene) under the given experimental conditions. Based on the experimental results, a mechanism for reductive degradation of DDT catalyzed by manganese porphyrins was proposed.
2011, Vol. 32 
