The Removal of Cu (II) from Aqueous Solution using Sodium Borohydride as a Reducing Agent

2017 5th International Conference on Environment Pollution and Prevention

生态环境科学

Sithole, N.T.^1 ; Ntuli, F.^1 ; Mashifana, T.^1

University of Johannesburg, Department of Chemical Engineering, P.O. Box 17011, Doornfontein

2088, South Africa^1

关键词: Metallic powder;    Optimum concentration;    Process industries;    Reductive precipitation;    Removal and recoveries;    Seeding materials;    Sodium borohydrides;    Synthetic waste water;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/120/1/012022/pdf
DOI  :  10.1088/1755-1315/120/1/012022

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The removal and recovery of metals from wastewater has been a subject of significant importance due the negative impact these toxic metals have on human health and the environment as a result of water and soil pollution. Increased use of the metals and chemicals in the process industries has resulted in generation of large quantity of effluents that contains high level of toxic metals and other pollutants. The objective of this work was to recover of Cu in its elemental form as metallic powder from aqueous solution using NaBH4as a reducing agent. Reductive precipitation was achieved in a batch reactor at 65°C using Cu powder as a seeding material. This study also investigated the effect of concentration of sodium borohydride (NaBH4) as a reducing agent. The amount of NaBH4was varied based on mole ratios which are 1:1, 1:0.25 and 1:0.1 to recover Cu from synthetic wastewater. The results obtained showed that sodium borohydride is an effective reducing agent to recover Cu from wastewater. The optimum concentration of NaBH4that gives the best results the 1:1 molar ratio with over 99% Cu removal.