Copper removal from water by chemical reduction with sodium borohydride

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399208019436· OSTI ID:7166420

Gomez-Lahoz, C; Garcia-Herruzo, F; Rodriguez-Maroto, J M; Rodriguez, J J ^[1]

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1. Univ. of Malaga (Spain)

The use of NaBH{sub 4} as a chemical reductant to precipitate copper from water has been studied. Initial Cu{sup 2+} concentrations of 25 and 40 mg have been checked, and complete removal can be achieved. When solid NaBH{sub 4} is fed, BH{sub 4}{sup {minus}} to Cu{sup 2+} molar ratios higher than 2 were needed. This can be substantially improved by using NaBH{sub 4} as a stabilized alkaline solution. A kinetic model is proposed which gives information about the relative rates of the two competitive reactions involved (Cu{sup 2+} and water reduction with BH{sub 4}{sup {minus}}) and allows the operating conditions leading to minimum BH{sub 4}{sup {minus}} consumption to be established.

• OSTI ID: 7166420
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 27:11; ISSN SSTED; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
BOROHYDRIDES
BORON COMPOUNDS
CHEMICAL REACTIONS
COPPER
DATA
DISPERSIONS
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INDUSTRIAL WASTES
INFORMATION
KINETIC EQUATIONS
LIQUID WASTES
MATHEMATICAL MODELS
METALS
MIXTURES
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
PRECIPITATION
QUANTITY RATIO
REDOX POTENTIAL
REDUCTION
REMOVAL
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
TRANSITION ELEMENTS
WASTE WATER
WASTES
WATER
WATER TREATMENT