oa South African Journal of Chemical Engineering - The removal of Ni & Cu from a mixed metal system using sodium borohydride as a reducing agent



Removal of nickel (II) and copper (II) from aqueous solutions using NaBH as a reducing agent was studied. Reduction crystallization was achieved in a batch reactor at 65°C using seeded experiments. The effect of using different molar ratios of [Ni2+] : [BH -] namely; 1:1, 1:0.25 and 1:0.1 and seeding materials on the rate of reduction was also investigated. The results obtained showed that NaBH4 is an effective reducing agent for the removal of Ni2+ and Cu2+ from effluents. Using a molar ratio of 1:0.1 of [Ni2+]: [BH -] and Fe and Ni as a seeding material over 99% metal removal was achieved. Ni as a seeding material yielded the best results as it is autocatalytic although there was no significant difference in the rate of reduction compared to that obtained when Fe was used as a seeding material.


Article metrics loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error