Adsorption of methyl orange onto protonated cross-linked chitosan

Adsorption capability of activated carbon synthesized from coconut shell

“…Other than activated carbon, the other adsorbents have some undesirable disadvantages in dye removal such as complex separation techniques from the adsorbate, little or no resistance against acid solutions, and poor mechanical strength and versatility. Additionally, these adsorbents need a long contact time with the adsorbate [18][19][20][21][22]. Therefore, with a high specific surface area, large pore volume, suitable pore size (2-50 nm), high degree of surface reactivity and effective adsorption quality, activated carbon has become the most desirable adsorbent [23][24][25][26].…”

Optimization of Sorption Parameters for Color Removal of Textile Dye by Cross-linked Chitosan Beads Using Box-Behnken Design

“…Values of model terms Prob> F <0.0500 designate that factors are significant under selected conditions. Significant model terms for response (RR4 removal %) are A, B, C, AB, AC, A 2 , B 2 , and C 2 , whereas another remaining term BC had less significance for the response and can be 05009-p. 2 neglected to improve the model and thus the equation developed is expressed by the following Equation (2): CR % = +51.69 +10.13A -13.80B +10.78C -5.15AB +2.93AC -12.85A 2 -6.20B 2 +1.90C 2 (2)…”

“…These dyes are considered hazardous, toxic, and non-biodegradable and tend to suppress photosynthetic activity in aquatic systems by preventing the penetration of sunlight and oxygen. Therefore it posed a serious environmental problem and direct destruction to the aquatic system when discharged into water stream [2,3]. Among the various treatments of effluents that contain dyes, the adsorption method is the best alternative and has been widely used to remove pollutants from effluents [4] because of its high performance, flexibility and simplicity of design, convenience of operation, and selectivity [5].…”

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“…Various environmental applications to remove synthetic dyes in water and air have been utilized using the photocatalytic properties of Titanium Dioxide (TiO2) possess the ability to adsorb Chitosan (Cs), due to its high adsorption potentials. A variety of useful features of Cs make it a versatile adsorbent, which is evident in the electrostatic attraction between the -NH2 functional groups and the solutes, both of which are capable of generating the adsorption of organic substrates by Cs [5,6]. The chelating groups (-NH2 and -OH groups assist as coordination and reaction sites, respectively) on the Cs is attributed to the binding ability of Cs for synthetic dyes [7] while the adsorption process that is simply mediated by Cs is amongst the most successful technique that were effectively used against inorganic, organic, and heavy metal pollutants from polluted water bodies [8].…”