Adsorption of chromium (VI) from aqueous solution by the iron (III)-impregnated sorbent prepared from sugarcane bagasse

Abstract

An iron (III)-impregnated sorbent was prepared from sugarcane bagasse and ferric chloride solution via carbonization/activation in a muffle furnace at 500°C for 4 h. The adsorption removal of chromium (VI) from aqueous solution by the iron (III)-impregnated sorbent was then studied in a batch system. With increasing initial chromium (VI) concentration from 25 to 130 mg/L at an adsorbent dose of 300 mg/50 mL, the amount of adsorbed chromium (VI) increased from 4.15 to 12.20 mg/g at 20°C, from 4.16 to 12.50 mg/g at 30°C, and from 4.16 to 13.72 mg/g at 40°C. The dynamical data fit very well with the pseudo-second-order kinetic model, and the calculated adsorption capacities of 4.16, 8.37, and 13.37 mg/g were equal to the actual values of the experiments at the initial chromium (VI) concentrations of 25, 50, and 100 mg/L, respectively. The Langmuir isotherm could yield better fits than the Freundlich isotherm. The calculated isotherm parameters confirmed the favorable adsorption of chromium (VI) on the iron (III)-impregnated sorbent.

Adsorption of Cr(VI) on crosslinked chitosan–Fe(III) complex in fixed-bed systems

“…Adsorption is the process whereby molecules are concentrated on the surface of the sorbent. A variety of materials has been used as Cr(VI) adsorbents, agricultural waste [5], Fe-grown carbon nanofibers [6] chitosan-Fe(III) crosslinked [7,8], magnetic chitosan-Fe(III) [9], hydrogel iron(III) complex amino-functionalized poly(acrylamide)-grafted coconut coir pith [10], biochar-supported zerovalent iron [11], ethylenediaminemodified crosslinked magnetic chitosan [12], polyaniline/silica gel composite [13], iron nanoparticles doped ordered mesoporous carbon [14], iron Fe +3 oxide/hydroxide nanoparticles [15], sugarcane bagasse-Fe(III) [16], Fe(III)-coated natural zeolite [17], Fe(II)-coated natural zeolite [18].…”

Defluoridation of water by activated carbon prepared from banana (Musa paradisiaca) peel and coffee (Coffea arabica) husk

“…However, these techniques have certain disadvantages such as incomplete removal, complicated treatment process, high cost, high energy requirement and operational cost, use of chemicals, and generation of toxic sludge or other waste products that again require disposal (Dubey and Shiwani 2012;Aliabadi et al 2012;Kumar et al 2012). Adsorption processes using natural adsorbents or agricultural waste products are becoming the new alternatives for the removal of fluoride from aqueous solution as they are cheap, simple, sludge-free, regenerable, environment friendly, involve small initial cost, and minimal chemical use (Saka et al 2012;Zhu et al 2012).…”

Kinetic mechanism of competitive adsorption of disperse dye and anionic dye on fly ash

“…The simplified linear form of first-order model was given by the Eq. (4) (Srivastava et al 2006;Wasewar et al 2008;Zhu et al 2012).…”