화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.45, No.23, 7743-7747, 2006
Recovery of chromium from the solid residue by in-situ-generated hypochlorite
The present study provides an electrochemical process for the recovery of chromium value from the solid residue of a chromium plant using electrogenerated hypochlorite. The process was studied using an in situ extraction method. The effect of various parameters-such as pH, concentration of hypochlorite, particle size of the solid effluent, pretreatment of sludge, choice of the acid for pH maintenance, and stirrings-on the extraction efficiency of chromium was investigated. A significant portion (50%-60%) of the total chromium content was recovered by performing the reaction under suitable operating conditions with hypochlorite.