Adsorptive removal of Cr(III) and Fe(III) from aqueous solution by chitosan/attapulgite composites: Equilibrium, thermodynamics and kinetics

Zou, Xiaohua; Pan, Jianming; Ou, Haiyan; Wang, Xue; Guan, Wei; Li, Chunxiang; Yan, Yongsheng; Duan, Yuqing

doi:10.1016/j.cej.2010.12.009

Cited by 123 publications

(36 citation statements)

References 41 publications

(23 reference statements)

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“…ions is proportional to the number of active sites occupied on sepiolite, and the overall rate of Zn 2? sorption processes appears to be controlled by sharing of electrons between the adsorbent and the adsorbate, or covalent forces, through the exchange of electrons between the particles involved (Zou et al 2011). Similar results were also reported by Sen and Gomez (2011) and Bektas et al (2004) in their studies on sorption of zinc and lead ions on bentonite and sepiolite particles, respectively.…”

Section: Kinetic Studiessupporting

confidence: 76%

Kinetics and thermodynamics of zinc removal from a metal-plating wastewater by adsorption onto an Iranian sepiolite

Hojati

Landi

2014

Int. J. Environ. Sci. Technol.

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The study of the kinetics and thermodynamics of the adsorption process can provide valuable information for the proper design and control of adsorption systems. The influence of temperature on the kinetics of Zn 2?sorption on an Iranian sepiolite sample was investigated through a series of batch experiments. Consistent with an exothermic reaction, an increase in the temperature resulted in decreasing Zn 2? adsorption rate. The sorption kinetics was tested for pseudo-first-order, pseudo-secondorder, and intraparticle diffusion models, and the rate constants were calculated. Results showed that the adsorption kinetics followed the pseudo-second-order kinetic model. The intraparticle diffusion model described that sorption of Zn onto the sepiolite particles is a two-step process, and intraparticle diffusion is not the only ratelimiting step. The results obtained from the study of thermodynamic data indicated that sorption of Zn onto sepiolite is non-spontaneous and less favored at higher temperatures.

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Section: Kinetic Studiessupporting

confidence: 76%

Kinetics and thermodynamics of zinc removal from a metal-plating wastewater by adsorption onto an Iranian sepiolite

Hojati

Landi

2014

Int. J. Environ. Sci. Technol.

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“…The chemical bonding occurred between the adsorbate and the adsorbent is quite strong, and then when the adsorbent surface is covered by the adsorbate, adsorbent will not adsorb another adsorbate, although the temperature and concentration increase. Langmuir isotherms obtain the adsorption capacity (Qmax) 250 mg.g -1 , it value is better compared to chitin, chitosan, clay, raphia palm fruit endocarp and chitosan/antapulgite composite which respectively have 1,4537; 90,09; 30,0; 16,3500; 62,50 mg.g -1 [6,7,11,12]. Then the equilibrium obtains value 0.8 L. mg -1 (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Adsorption is one of the most effective and simple methods for treatment of hazardous toxic waste from solution and an economically viable alternative if a low-cost adsorbent is utilized [7,8,9]. The study on Fe metal ion adsorption has also been performed using various natural materials, such as natural zeolite and modified zeolite [10], chitin, natural clay and activated clay [6], unmodified raphia palm [11], chitosan/ attapulgite composite [12], and maize husk [5]. In addition, there are still many other natural materials.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Characteristic of Iron Onto Poly[eugenol-Co-(Divinyl Benzene)] From Aqueous Solution

Silvianti¹,

Siswanta²,

Aprilita³

et al. 2017

J. Nat.

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“…The Langmuir and Freundlich isotherm models are the two most widely accepted and easily linearized adsorption models (Ulku et al 2000;Sadin et al 2009;Zou et al 2011). The Langmuir isotherm model assumes uniform adsorption on the surface and is used for describing monolayer adsorption onto a surface containing a finite number of identical sites.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Biosorption of Silver Ions by Paecilomyces Lilacinus Biomass: Equilibrium, Kinetics and Thermodynamics

Song

Huang

et al. 2011

Adsorption Science & Technology

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ABSTRACT:The freeze-dried biomass of Paecilomyces lilacinus was employed as a biosorbent for the removal of silver ions from aqueous solution. The effects of factors such as the solution pH, the initial Ag(I) ion concentration, contact time and temperature were examined. Maximum Ag(I) adsorption was obtained at pH 3.0. The pseudo-first-order, pseudo-second-order and intra-particle diffusion kinetic models were fitted to the experimental data when it was found that such data were best fitted by the pseudo-second-order kinetic model. The equilibrium experimental data were well fitted by the Langmuir model (R 2 > 0.995) and the maximum biosorption capacity at 298 K was 101.0 mmol/g. Thermodynamic parameters such as the Gibbs' free energy, ∆G 0 , the standard enthalpy, ∆H 0 , and the standard entropy, ∆S 0 , were evaluated. The results indicated that the biosorption of Ag(I) ions onto P. lilacinus biomass was spontaneous and endothermic in nature. The FT-IR analysis results indicated that amine, carboxylic and hydroxyl groups were involved in the biosorption process.

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Adsorptive removal of Cr(III) and Fe(III) from aqueous solution by chitosan/attapulgite composites: Equilibrium, thermodynamics and kinetics

Cited by 123 publications

References 41 publications

Kinetics and thermodynamics of zinc removal from a metal-plating wastewater by adsorption onto an Iranian sepiolite

Kinetics and thermodynamics of zinc removal from a metal-plating wastewater by adsorption onto an Iranian sepiolite

Adsorption Characteristic of Iron Onto Poly[eugenol-Co-(Divinyl Benzene)] From Aqueous Solution

Biosorption of Silver Ions by Paecilomyces Lilacinus Biomass: Equilibrium, Kinetics and Thermodynamics

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