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A review on zinc and nickel adsorption on natural and modified zeolite, bentonite and vermiculite: examination of process parameters, kinetics and isotherms.

Journal of hazardous materials (2013-05-07)
S Malamis, E Katsou
ABSTRACT

Adsorption and ion exchange can be effectively employed for the treatment of metal-contaminated wastewater streams. The use of low-cost materials as sorbents increases the competitive advantage of the process. Natural and modified minerals have been extensively employed for the removal of nickel and zinc from water and wastewater. This work critically reviews existing knowledge and research on the uptake of nickel and zinc by natural and modified zeolite, bentonite and vermiculite. It focuses on the examination of different parameters affecting the process, system kinetics and equilibrium conditions. The process parameters under investigation are the initial metal concentration, ionic strength, solution pH, adsorbent type, grain size and concentration, temperature, agitation speed, presence of competing ions in the solution and type of adsorbate. The system's performance is evaluated with respect to the overall metal removal and the adsorption capacity. Furthermore, research works comparing the process kinetics with existing reaction kinetic and diffusion models are reviewed as well as works examining the performance of isotherm models against the experimental equilibrium data.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
沸石
Sigma-Aldrich
膨润土
Sigma-Aldrich
纳米粘土,亲水性膨润土
Sigma-Aldrich
介孔结构的硅铝酸盐, MCM-41 (hexagonal)
Sigma-Aldrich
镍, foil, thickness 0.125 mm, ≥99.9%
Sigma-Aldrich
镍, wire, diam. 0.25 mm, ≥99.9%
Sigma-Aldrich
镍, foil, thickness 0.1 mm, 99.98% trace metals basis
Sigma-Aldrich
镍, foil, thickness 0.25 mm, 99.995% trace metals basis
Sigma-Aldrich
镍, foil, thickness 0.5 mm, 99.98% trace metals basis
Sigma-Aldrich
镍, wire, diam. 0.5 mm, ≥99.99% trace metals basis
Sigma-Aldrich
镍, wire, diam. 0.5 mm, ≥99.9% trace metals basis
Sigma-Aldrich
镍, sputtering target, diam. × thickness 2.00 in. × 0.25 in., 99.95% trace metals basis
Sigma-Aldrich
镍, rod, diam. 6.35 mm, ≥99.99% trace metals basis
镍, pellets, 100g, max. size 5mm, 99.99+%
镍, rod, 100mm, diameter 3.3mm, 99.99+%
镍, foil, 100x100mm, thickness 1.6mm, 99%
镍, foil, 50x50mm, thickness 0.25mm, as rolled, 99.999%
镍, foil, 150x150mm, thickness 0.20mm, annealed, 99%
镍, foil, 25mm disks, thickness 0.0025mm, 99.95%
镍, wire reel, 250m, diameter 0.25mm, annealed, 99%
镍, foil, 100x100mm, thickness 0.125mm, annealed, 99.98%
镍, rod, 100mm, diameter 3.0mm, 99%
镍, rod, 500mm, diameter 3.0mm, 99%
镍, foil, 50mm disks, thickness 0.05mm, 99.9%
镍, rod, 50mm, diameter 40mm, 99%
镍, foil, 100x100mm, thickness 0.3mm, annealed, 99%
镍, wire reel, 20m, diameter 0.5mm, as drawn, 99%
镍, wire reel, 10m, diameter 1.0mm, hard, 99.98%
镍, foil, 4mm disks, thickness 0.075mm, annealed, 99%
镍, foil, 4mm disks, thickness 0.075mm, as rolled, 99.98%