Article ID Journal Published Year Pages File Type
588613 Process Safety and Environmental Protection 2010 5 Pages PDF
Abstract

The removal of copper and nickel from aqueous solution on the Na-bentonite has been studied under static conditions. Experiments were carried out as a function of solution pH, dosage of Na-bentonite, contact time and temperature. The adsorption equilibrium for nickel and copper onto Na-bentonite is reached in 200 min. The adsorption of copper and nickel is pH dependent in the pH range 2–9. The kinetic process of adsorption can be described by the pseudo-second-order kinetic equation excellently and the adsorption isotherm be fitted to the Langmuir model by means of regression analyses very well. The adsorption capacities follow the order of Cu2+ > Ni2+ in single-component systems and competitive adsorption capacities in order decreasing is Cu2+ > Ni2+ in binary-component systems.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Health and Safety
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