Abstract:To control the ecosystems affections of Hexachlorbenzene (HCB) contaminated water body, the feasibility of zero-valent iron treatment of HCB contaminated water body was analyzed. The mechanisms of affecting factors were investigated systematically. The results show that the HCB removal efficiency increases with the increasing reaction time and iron dosage, but increases slowly when iron dosage is more than 35 mg. Initial pH of reaction solution has significant influence on the dechlorination. It shows a higher HCB removal efficiency when initial pH is between 3 and 6 and the optimal pH is 4.5. Reaction temperature has little effect on HCB removal when it ranges from 20 to 30 ℃. HCB removal methodology follows pseudo-first-order decay kinetics. It is a promissing process for its simple process flow.