Remoção eletroquímica do CR III proveniente do processo de tanagem para reúso.

Abstract

The present work is directed to making the tanning bath of skins in an ecological and adequate sustainable process in the chrome removal, as a heavy metal. The efficiency of chromium removal was analyzed through the electrochemical process; the chrome ion presented in the soil was originated from the ultra absorption of the infiltration of the tanning bath residue from the Tanning Industry. A Falling film cell operating under galvan static control, consisting of a nickel cathode and a DSA® anode, was used in this process. In this work, the best efficiency of the chrome ion removal was studied, for the different current densities, flow rate alimentation and process time operation. The best result obtained for the chrome removal efficiency, 34, 34%, was at a current density of 2.0 A.dm"2, flow rate of 500 l.h"1 and operation time of 4 hours.