Copper Removal from Water by Chemical Reduction with Sodium Borohydride
- 23 September 1992
- journal article
- research article
- Published by Taylor & Francis in Separation Science and Technology
- Vol. 27 (11) , 1449-1468
- https://doi.org/10.1080/01496399208019436
Abstract
The use of NaBH4 as a chemical reductant to precipitate copper from water has been studied. Initial Cu2+ concentrations of 25 and 40 mg/L have been checked, and complete removal can be achieved. When solid NaBH4 is fed, BH4 − to Cu2+ molar ratios higher than 2 were needed. This can be substantially improved by using NaBH4 as a stabilized alkaline solution. A kinetic model is proposed which gives information about the relative rates of the two competitive reactions involved (Cu2+ and water reduction with BH4 0) and allows the operating conditions leading to minimum BH4 − consumption to be established.Keywords
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