Kinetic, equilibrium and thermodynamic study on the removal of Congo Red from aqueous solutions by adsorption onto apricot stone

Abbas, Moussa; Trari, M.

doi:10.1016/j.psep.2015.09.015

Cited by 168 publications

(38 citation statements)

References 53 publications

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“…Adsorption isotherms describe how adsorbates interact with adsorbents and can be divided into four types, L, S, H, and C, according to the slope changes of the nearest curve of their departure from the origin . The isotherms of CMWBFS displayed L type curves (Figure S1).…”

Section: Resultsmentioning

confidence: 99%

Transport of reactive X‐3B dye at the interface between cationic surfactant‐modified water‐quenched blast furnace slag and aqueous solution

Wang

Huang

et al. 2018

Can J Chem Eng

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There is an emerging interest in the utilization of low‐cost industrial wastes in sustainable pollution control. This study investigated the use of water‐quenched blast furnace slag modified by cetyltrimethyl ammonium bromide as a low‐cost adsorbent for the removal of reactive brilliant red X‐3B from an aqueous solution. The results showed that the removal efficiency increased with an increasing slag dosage and an appropriate dosage for adsorption was 8 g/L. The adsorption efficiency of X‐3B onto modified slag decreased when the pH increased from 2 to 12. The amount of dye uptake per unit of modified slag also increased with an increase in ionic strength, contact time, temperature, and initial dye concentration. The Freundlich isotherm model showed a good fit to the equilibrium adsorption data. Thermodynamic studies suggested the spontaneous and endothermic nature of the adsorption process. The adsorption kinetics followed the pseudo‐second‐order model and the rate constant increased with increasing temperature. These results can help understand the migration patterns of dye molecules at a modified slag‐water interface. It also has important implications for developing wastewater treatment techniques using low‐cost adsorbents.

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Section: Resultsmentioning

confidence: 99%

Transport of reactive X‐3B dye at the interface between cationic surfactant‐modified water‐quenched blast furnace slag and aqueous solution

Wang

Huang

et al. 2018

Can J Chem Eng

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“…It can be seen from the table that the AC-ZnO composites showed the comparable adsorption capacity with respect to other low-cost adsorbents. The maximum adsorption capacity of AC-ZnO composites is slightly lower when compared with the AC prepared from Myrtus communis [19] and apricot stones [22]. However, the adsorption capacity was higher than those of AC prepared from coir pith [18], commercial grade AC [51], Bagasse Fly Ash [51], and other agricultural wastes [53][54][55].…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…However, the high cost of commercially available AC limits its use in most developing countries. In order to solve the problem, many researchers have prepared AC from industrial and agricultural wastes such as sewage sludge [16], tires [17], coir pith [18], Myrtus communis, and pomegranate [19], tire crumbs [20], date pits [21], apricot stones [22], walnut shells [23], and wood sawdust [24] for the removal of organic compounds or dyes from aqueous solution. While the conversion of various industrial and agricultural wastes into AC provides a potentially cheap alternative to existing commercial carbons, there is still a great need to prepare AC from cheaper and readily available materials for the removal of dyes from wastewater in pilot and industrial scales.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted regeneration of spent activated carbon containing zinc acetate and its application for removal of congo red

Zhu

et al. 2016

Desalination and Water Treatment

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2016):Microwave-assisted regeneration of spent activated carbon containing zinc acetate and its application for removal of congo red, Desalination and Water Treatment,The spent activated carbon (AC) loaded with zinc acetate from the vinyl acetate synthesis industry has been used as a raw material to prepare AC-ZnO porous adsorbents using microwave irradiation technique with three different activating agents. The morphology and surface chemical compositions of the prepared samples were characterized by X-ray diffraction, scanning electron microscope, Fourier transform infrared spectroscopy, and N 2 adsorption-desorption isotherm. The regenerated AC-ZnO composites exhibited a welldeveloped porous structure with Brunauer-Emmett-Teller surface area in excess of 1,100 m 2 /g, and the ZnO nanoparticles decomposed from zinc acetate loaded on the surface of the regenerated AC without aggregation. The adsorption performance of the AC-ZnO composites was further evaluated by adsorbing Congo Red (CR) from aqueous solutions. The experimental isotherms data were analyzed using Langmuir, Freundlich, and Temkin models. Langmuir and Temkin models were found to satisfactorily match the experimental data with the maximum CR adsorption capacity of 16.72 mg/g for the sample activated by CO 2 at 308 K. Similarly, the kinetics of adsorption were tested with pseudo-first-order, pseudo-second-order, and intraparticle diffusion models, and the data were found to conform to the pseudo-second-order kinetics with high correlation coefficient. The intraparticle diffusion model indicated external film diffusion, and intraparticle diffusion has taken place during the adsorption process.

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“…The textile and leather industry can take advantage of these inexpensive and biodegradable sorbents, by using them for the treatment of wastewater (Gomes et al, 2016;Rangabhashiyam et al, 2013;Weng and Chen, 2015). Activated carbons obtained from lignocellulosic wastes of different origins have shown high adsorptive potential for different classes of dyes: activated carbon obtained from fruit peels (Foo and Hameed, 2011), fruit stones (Abbas and Trari, 2015;Hazzaa and Hussein, 2015) or wood sawdust (Malik, 2004) were reported to have good adsorptive affinity for both anionic and cationic dyes, in comparison with classic activated carbon (Secula et al, 2014) or with granular activated carbon coupled with electrocoagulation (Secula et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Low-cost sorbents for the removal of acid dyes from aqueous solutions

Creţescu

Lupaşcu

Buciscanu

et al. 2017

Process Safety and Environmental Protection

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Kinetic, equilibrium and thermodynamic study on the removal of Congo Red from aqueous solutions by adsorption onto apricot stone

Cited by 168 publications

References 53 publications

Transport of reactive X‐3B dye at the interface between cationic surfactant‐modified water‐quenched blast furnace slag and aqueous solution

Transport of reactive X‐3B dye at the interface between cationic surfactant‐modified water‐quenched blast furnace slag and aqueous solution

Microwave-assisted regeneration of spent activated carbon containing zinc acetate and its application for removal of congo red

Low-cost sorbents for the removal of acid dyes from aqueous solutions

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