Adsorption of basic dye using activated carbon prepared from oil palm shell: batch and fixed bed studies

Adsorption of chromium(VI) on pomace--an olive oil industry waste: batch and column studies.

Chitosan–clay composite as highly effective and low-cost adsorbent for batch and fixed-bed adsorption of methylene blue

Dyes used in the coloration of textiles, paper, and other products are highly visible, sometimes toxic, and sometimes resistant to biological breakdown; thus it is important to minimize their release into aqueous environments. This review article considers how biosorption of dyes onto cellulose-related materials has the potential to address such concerns. Numerous publications have described how a variety of biomass-derived substrates can be used to absorb different classes of dyestuff from dilute aqueous solutions. Progress also has been achieved in understanding the thermodynamics, kinetics, and chemical factors that control the uptake of dyes. Important questions remain to be more fully investigated, such as those involving the full life-cycle of cellulosic substrates that are used for the collection of dyes. Also, more work needs to be done in order to establish whether biosorption should be implemented as a separate unit operation, or whether it ought to be integrated with other water treatment technologies, including the enzymatic breakdown of chromophores.

https://ojs.cnr.ncsu.edu/index.php/BioRes/article/download/BioRes_06_2_2161_Hubbe_HD_Removal_Pollutants_Review_Pt1_Metals/1901

Cellulosic substrates for removal of pollutants from aqueous systems: a review. 1. metals

Biosorption of Cr(VI) ions from aqueous solutions: Kinetics, equilibrium, thermodynamics and desorption studies

Cr(VI) adsorption by waste acorn of Quercus ithaburensis in fixed beds: Prediction of breakthrough curves

Using phosphogypsume and boron concentrator wastes in light brick production

Kinetics of oxalic acid leaching of tincal

A comparison was made of influence of physically adsorbed methylene blue (MB) dye on the physicochemical properties of Manisa-Akdere zeolite (natural zeolite) and zeolite modified with K and Ca (all samples treated with hydrogen peroxide before modification) using batch adsorption technique. After elementary characterization of this adsorbent, the effects were investigated of initial MB concentration, pH, contact time, stirring rate, adsorbent dosage and temperature on the selectivity and sensitivity of the removal process. A larger adsorption of the dye was observed for modified zeolite (42.7 mg/g) than for natural zeolite (28.6 mg/g) per gram of an adsorbent after all zeolite samples treated with hydrogen peroxide. Zeolite treated with H2O2 showed higher adsorption capacity than untreated zeolite samples. The Langmuir model (R 2 values between 0.959 and 0.996) fitted the experimental data better than the Freundlich model (R 2 values between 0.804 and 0.988). The adsorption process was found to be slightly influenced by adsorbent dosage, contact time and temperature. Optimum pH for adsorption of MB was found to be at 7. Adsorption equilibrium attained within 30 minutes. The sorption of MB increased slightly with rising temperature. In addition, adsorption values rose with modification Ca- Exchanged (after H2O2 treatment) > K-Exchanged (after H2O2 treatment) > Zeolite treated with H2O2 > Ca-Exchanged >K-Exchanged >Natural Zeolite.

/pdf/removal-of-methylene-blue-by-natural-and-ca-and-k-exchanged-4swes1tb0o.pdf

Yüksel Abali

Papers

Cr(VI) adsorption by waste acorn of Quercus ithaburensis in fixed beds: Prediction of breakthrough curves

Using phosphogypsume and boron concentrator wastes in light brick production

Kinetics of oxalic acid leaching of tincal

REMOVAL OF METHYLENE BLUE BY NATURAL AND Ca AND K-EXCHANGED ZEOLITE TREATED WITH HYDROGEN PEROXIDE

The optimisation of the dissolution of phosphate rock with Cl2SO2 gas mixtures in aqueous medium