@article{(Open Science Index):https://publications.waset.org/pdf/6944, title = {Chemical Degradation of Dieldrin using Ferric Sulfide and Iron Powder}, author = {Junko Hara and Yoshishige Kawabe and Takeshi Komai and Chihiro Inoue}, country = {}, institution = {}, abstract = {The chemical degradation of dieldrin in ferric sulfide and iron powder aqueous suspension was investigated in laboratory batch type experiments. To identify the reaction mechanism, reduced copper was used as reductant. More than 90% of dieldrin was degraded using both reaction systems after 29 days. Initial degradation rate of the pesticide using ferric sulfide was superior to that using iron powder. The reaction schemes were completely dissimilar even though the ferric ion plays an important role in both reaction systems. In the case of metallic iron powder, dieldrin undergoes partial dechlorination. This reaction proceeded by reductive hydrodechlorination with the generation of H+, which arise by oxidation of ferric iron. This reductive reaction was accelerated by reductant but mono-dechlorination intermediates were accumulated. On the other hand, oxidative degradation was observed in the reaction with ferric sulfide, and the stable chemical structure of dieldrin was decomposed into water-soluble intermediates. These reaction intermediates have no chemical structure of drin class. This dehalogenation reaction assumes to occur via the adsorbed hydroxyl radial generated on the surface of ferric sulfide.}, journal = {International Journal of Chemical and Molecular Engineering}, volume = {3}, number = {3}, year = {2009}, pages = {148 - 153}, ee = {https://publications.waset.org/pdf/6944}, url = {https://publications.waset.org/vol/27}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 27, 2009}, }