Consequence of chitosan treating on the adsorption of humic acid by granular activated carbon

Maghsoodloo, Sh.; Noroozi, Babak; Haghi, A. K.; Sorial, George A.

doi:10.1016/j.jhazmat.2011.04.096

Cited by 79 publications

(37 citation statements)

References 46 publications

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“…(6). If n is close to 1, the surface heterogeneity could be assumed to be less significant, and as n approaches 10, the impact of surface heterogeneity becomes more significant [18].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Effective Removal of Humic Acid Using Strontium-Doped TiO2 Coated on Porous Ceramic Filter Media in Water Resource

Tung¹,

Xu²,

Zhang³

et al. 2018

Pol. J. Environ. Stud.

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Humic substances are among the most important natural organic matters (NOM) existing in ground and surface waters and are known as one of the main disinfection by-product (DBPs) precursors that may act as health risk factors [1]. Humic substances -mainly humic acids (HA), which constitute the major fraction of NOM in water supplies -have been suggested as a standard for mimicking NOM in the laboratory. HA are non-biodegradable and have color, odor, and also exhibit a wide range of distribution in molecular weight and Pol. J. Environ. Stud. Vol. 27, No. 6 (2018), 2765-2774 AbstractA photocatalyst comprised of strontium-doped TiO 2 coated on porous ceramic filter media (Sr-TiO 2 /PCFM) was prepared using the heat-treated process. The main objective of this study was to investigate the effects of catalyst dosage, initial HA concentrations, pH, and temperature on the adsorption and degradation of humic acid (HA) in a solution containing Sr-TiO 2 /PCFM under irradiation of UV light. Removal efficiency of 84.25% for HA was achieved under experimental conditions for a Sr-TiO 2 /PCFM dosage of 80 g at an initial concentration of 15 mg/L over a period of 8 h. Higher degradation was found for HA in the acidic environment and at higher operating temperatures. The rate of the adsorption reaction followed the pseudo second-order kinetics with the sorption isotherm well fitted to the Freundlich and Langmuir isotherm models. The oxidation rate constants of HA were evaluated by using pseudo first-order kinetics that can describe the photodegradation process. Furthermore, the photocatalytic stability of Sr-TiO 2 /PCFM was performed with 3 cycles reused. These findings suggest that the Sr-TiO 2 /PCFM was found to be an effective and promising approach to eliminating HA in water resources.

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“…(6). If n is close to 1, the surface heterogeneity could be assumed to be less significant, and as n approaches 10, the impact of surface heterogeneity becomes more significant [18].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Effective Removal of Humic Acid Using Strontium-Doped TiO2 Coated on Porous Ceramic Filter Media in Water Resource

Tung¹,

Xu²,

Zhang³

et al. 2018

Pol. J. Environ. Stud.

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“…The effects of experimental parameters such as, initial humic acid concentration (10-100 mg/L), pH (3)(4)(5)(6)(7)(8)(9)(10), adsorbent dosage (0.01-0.09 g), and temperature (298-318 K) on the adsorptive removal of humic acids were studied in a batch mode of operation for a specific period of contact time (60-600 min) at a fixed speed of 200 rpm. While pH was adjusted using 0.1 N HCl or 0.1 N NaOH, batch equilibrium adsorption experiments were performed using 100 mL of humic acid.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…Many kinds of adsorbents have been developed for the removal of humic acids from water, among which we can mention activated carbon [6][7][8][9][10], as well as resins [11], clays [12,13], zeolite [14][15][16], metal oxides [17], and biopolymers (chitosan) [18,19], as suggested in previous research studies. Although activated carbon exhibits a high surface area and high adsorption capacity, it has high operation costs and requires frequent regeneration.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of humic acid on activated carbon prepared from almond shell: approach for the treatment of industrial phosphoric acid solution

Omri

Benzina

Trabelsi³

et al. 2013

Desalination and Water Treatment

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A B S T R A C TAlmond shell was used as a precursor to prepare activated carbon, using carbon dioxide as a physical activation agent. Its ability to remove the humic acid was evaluated. The surface area of almond shell activated carbon was found to be 1,310 m 2 /g. The effects of experimental parameters such as pH, initial humic acid concentration, contact time, adsorbent dosage, and solution temperature on the adsorption were investigated. To describe the equilibrium isotherms the experimental data were analyzed by the Langmuir, Freundlich, and Temkin isotherm models. Pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models were used to find out the kinetic parameters and mechanism of adsorption process. The thermodynamic parameters such as DG˚, DH˚, and DS˚were calculated for predicting the nature of adsorption. For an approach to an industrial application, activated carbon prepared from almond shell seems to be an effective, low-cost, and good adsorbent precursor for the removal of humic acid from commercial phosphoric acid solution.

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“…In recent years, surface-modified activated carbon was prepared to improve the adsorption capacity and removal efficiency of metals ions [16][17][18]. Chitosan, a biopolymer of glucosamine has received considerable attention for the removal of transition metal ions and organic species due to its excellent metal chelating property and availability [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and desorption studies on the performance of Fe–loaded chitosan carbonized rice husk for metal ion removal

Sugashini

Begum

2013

Desalination and Water Treatment

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A B S T R A C TReuse of agro-waste into useful adsorbents like activated carbon has considerable attention in waste water treatment. Usually the activation of carbon is done by treating it with inorganic chemicals, polymers, biopolymers, etc. This paper deals with the preparation of novel Fe-loaded chitosan carbonized rice husk beads (Fe-CCRB) by blending Fe (metal)-loaded chitosan (organic compound) and carbonized rice husk. The prepared Fe-CCRB was used for the removal of metal ion. The surface properties of the adsorbent were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Brauner-Emmett-and Teller (BET) analyzer. The effects of process variables, such as contact time, agitation speed, initial metal ion concentration, adsorbent dosage, pH, and temperature of the solution using Fe-CCRB were studied. Various isotherms and kinetic models were fitted with experimental data to describe the behavior of diffusion mechanism, solute interaction, and nature of adsorption with the adsorbent through batch studies. Mass transfer and thermodynamic characteristics were also evaluated. Regeneration studies were attempted to check the stability and activity of the adsorbent.

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Consequence of chitosan treating on the adsorption of humic acid by granular activated carbon

Cited by 79 publications

References 46 publications

Effective Removal of Humic Acid Using Strontium-Doped TiO2 Coated on Porous Ceramic Filter Media in Water Resource

Effective Removal of Humic Acid Using Strontium-Doped TiO2 Coated on Porous Ceramic Filter Media in Water Resource

Adsorptive removal of humic acid on activated carbon prepared from almond shell: approach for the treatment of industrial phosphoric acid solution

Adsorption and desorption studies on the performance of Fe–loaded chitosan carbonized rice husk for metal ion removal

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