Ultrafine Zinc and Nickel, Palladium, Silver Coated Zinc Particles Used for Reductive Dehalogenation of Chlorinated Ethylenes in Aqueous Solution

摘要

Zero-valent zinc metal has been employed for the reductive dehalo- genation of chlorinated ethylenes. In order to enhance this enve- ronmental remediation chemistry, ultrafine zinc particles and transition metal additives (coatings) have been employed. Indeed, actiated zinc (cryozinc) significantly enhanced the reduction/de- halogenation process, especially in the presence of nickel and pal- ladium coatings. These reagents were able to achieve rapoid, deep reductive dehalogenation of trichloroethylene, trichloroethane, and dichloroethylenes at room temperature under neutral pH condi- tions.