This paper describes the adsorption of heavy metal ions from aqueous solutions by oak (Quercus coccifera) sawdust modified by means of HCl treatment. Our study tested the removal of three heavy metals: Cu, Ni, and Cr. The optimum shaking speed, adsorbent mass, contact time, and pH were determined, and adsorption isotherms were obtained using concentrations of the metal ions ranging from 0.1 to ...

The development of nanocomposite with strong adsorption ability exhibits great potential applications for environmental remediation. However, the pore blocking in preparation frequently constrains sorption diffusion, resulting in low utilization efficiency. Here we synthesized a new nano-ZrO2/Polystyrene (NZO-PS) material tailored with a specific fixed SO3-Na group to enhance Cu(II) removal. Th...

Copper is present in different types of industrial effluents, being responsible for environmental pollution. Biosorption of heavy metals can be an effective process for the removal and recovery of heavy metal ions from aqueous solutions. The biomass of marine algae has been reported to have high uptake capacities for a number of heavy metal ions. In this paper, the adsorption properties of a pr...

The sorption properties of rice husk towards Cu(II), Cd(II) and Pb(II) were studied. The sorption isotherms are described by the Langmuir equation, and Pb(II) shows a higher affinity for rice husk compared to Cu(II) and Cd(II) under the same conditions. The kinetics of sorption obeys to a pseudo second-order equation for all metals. The sorption profiles as a function of the pH were used to ...

Sorption experiments using the dead biomass of Spirogyra species, for copper removal were carried out to study the influence and optimization of the biosorption of Cu (II). The effect of pH (1.0 10.0), initial metal ion concentration (1 100ppm), different contact periods (30 180 min), varying temperature (25 – 50 oC) and varying biomass quantities (0.5,1.0,1.5 and 2.0 g) were also examined. It ...

Living Phanerochaete chrysosporium mycelia were used to remove heavy metals of Cd(II), Cu(II) and Zn(II) in auqeous solution. The uptake of heavy metal by the mycelia was dependent on the environmental conditions. The optimum biosorption conditions of Cd(II), Cu(II), and Zn(II) were pH 5.5-6.5 at 37 degrees C, and 6 h. Under these conditions, the fungal biosorbent removed Cd(II), Cu(II), and Zn...

A basic investigation on the removal of Cu(II) and Ni(II) ions from metal solution by crosslinked chitosan-g-acrylonitrile copolymer was conducted in a batch adsorption system. Graft copolymers of crosslinked chitosan (CLCS) with acrylonitrile (AN) were prepared by free radical polymerization using initiator ceric ammonium nitrate as redox system. Graft copolymerization was confirmed by FTIR, X...

The aim of this work is to ascertain the potentials of different agroforestry wastes to be used as biosorbents in the removal of a mixture of heavy metals. Fern (FE), rice husk (RI) and oak leaves (OA) presented the best removal percentages for Cu(II) and Ni(II), Mn(II) and Zn(II) and Cr(VI), respectively. The performance of a mixture of these three biosorbents was evaluated, and an improvement...