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Cationic and anionic dye adsorption by agricultural solid wastes: A comprehensive review

Recent advances for dyes removal using novel adsorbents: A review

Silica combined with 2% multiwall carbon nanotubes (SiO2-CNT) was synthesized and characterized. Its sorption efficacy was investigated for the Hg(II) removal from an aqueous solution. The effect of pH on the percentage removal by the prepared material was examined in the range from 3 to 7. The adsorption kinetics were well fitted by using a pseudo-second-order model at various initial Hg(II) concentrations with R (2) of >0.99. The experimental data were plotted using the interparticle diffusion model, which indicated that the interparticle diffusion is not the only rate-limiting step. The data is well described by the Freundlich isotherm equation. The activation energy (Ea) for adsorption was 12.7 kJ mol(-1), indicating the process is to be physisorption. Consistent with an endothermic process, an increase in the temperature resulted in increasing mercury removal with a ∆H(o) of 13.3 kJ/mol and a ∆S(o) 67.5 J/mol K. The experimental results demonstrate that the combining of silica and nanotubes is a promising alternative material, which can be used to remove the mercury from wastewaters.

Isotherm, kinetic, and thermodynamic studies on Hg(II) adsorption from aqueous solution by silica- multiwall carbon nanotubes

Activated carbons from waste biomass by sulfuric acid activation and their use on methylene blue adsorption.

Hg(II) removal from water by chitosan and chitosan derivatives: a review.

Removal of mercury (II) from aqueous solution by activated carbon obtained from furfural.

The influence of the texture and surface properties of carbon adsorbents obtained from biomass products on the adsorption of manganese ions from aqueous solution

Formation of porous structure of semicokes from pyrolysis of Turkish coals in different atmospheres

Synthesis of carbon foam with high compressive strength from an asphaltene pitch

The adsorption of detergents—sulfonic and phenolic compounds—from aqueous solutions by activated carbons (AC), obtained on the base of different precursors, was studied. The carbon adsorbents used were prepared by water vapor pyrolysis of different raw materials: peach stones, olive stones, natural asphaltite, mixtures from coal tar pitch, and furfural. It was established that all the samples of ACs have close values of high adsorption capacities toward the studied detergents. Some factors affecting the adsorption process—the time of treatment and the amount of the adsorbent—were investigated. It was established that the amount of adsorbent has no significant influence on the adsorption process.

M.F. Yardim

Papers

Removal of mercury (II) from aqueous solution by activated carbon obtained from furfural.

The influence of the texture and surface properties of carbon adsorbents obtained from biomass products on the adsorption of manganese ions from aqueous solution

Formation of porous structure of semicokes from pyrolysis of Turkish coals in different atmospheres

Synthesis of carbon foam with high compressive strength from an asphaltene pitch

Removal of detergents from water by adsorption on activated carbons obtained from various precursors