Adsorption removal of Congo red from aqueous solution by polyhedral Cu2O nanoparticles: Kinetics, isotherms, thermodynamics and mechanism analysis

Shu, Jinxia; Wang, Zhonghua; Huang, Yijiang; Huang, Nan; Ren, Chunguang; Zhang, Wei

doi:10.1016/j.jallcom.2015.02.048

Cited by 185 publications

(59 citation statements)

References 60 publications

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“…In general, Gibbs free energy change of physical adsorption process (-20-0 k J mol -1 ) is less than that of chemisorption process (-400-80 kJ mol -1 ). It is seen from Table 4 that all DG values were in the range of -30-0 kJ mol -1 , suggested that tetracycline adsorption on NH 2 -MIL-101(Cr) could not rule out a small amount of physical adsorption, which is in accord with the absorption literature [49,50]. In summary, the thermodynamic adsorption model simulation results indicated that the adsorption process is endothermic, thermodynamically feasible and spontaneous nature of the adsorption.…”

Section: Chemisorption Mechanismsupporting

confidence: 59%

The synthesis of mesostructured NH2-MIL-101(Cr) and kinetic and thermodynamic study in tetracycline aqueous solutions

Tian

Jia

et al. 2016

J Porous Mater

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In this paper, metal-organic framework NH 2 -MIL-101(Cr) was prepared and used as an adsorbent for removing tetracycline from aqueous system. The results showed that NH 2 -MIL-101(Cr) had the better adsorption property for tetracycline. The adsorption capacities for tetracycline reached 36.15 and 48.80 % in 10 and 240 min, respectively. Additionally, the study of adsorption kinetics and thermodynamic theories showed that the adsorption kinetics and thermodynamic datum of tetracycline were adapted to the pseudo-second-order model and the Freundlich model, respectively. In the meantime, the adsorption process was considered as an endothermic process, spontaneous nature of the adsorption and chemical adsorption in dominating station.

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Section: Chemisorption Mechanismsupporting

confidence: 59%

The synthesis of mesostructured NH2-MIL-101(Cr) and kinetic and thermodynamic study in tetracycline aqueous solutions

Tian

Jia

et al. 2016

J Porous Mater

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“…The KC demonstrated the highest adsorption capacity by removing >98% of CR after 10 min −1 of contact. The removal of CR from aqueous solutions by polyhedral Cu 2 O nanoparticles and ZIF‐9@super‐macroporous microsphere have been reported by Shu et al and Dai et al, respectively. Diouri et al also investigated the adsorption of CR onto marble dust.…”

Section: Introductionmentioning

confidence: 83%

Accelerated Decolorization of Congo Red by Powdered Termite Mound

Ayanda

Odo

Malomo

et al. 2017

CLEAN Soil Air Water

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The decolorization of congo red (CR) in aqueous solution is investigated in a batch mode using termite mound as an adsorbent. Elemental analysis and identification of the mineral composition/phases in the termite mound sample is carried out by means of X‐ray fluorescence and X‐ray diffraction. The optimal percentage removal and equilibrium adsorption capacity of CR by the termite mound achieved is found to be 95.68% and 2.30 mg g−1, respectively, when 0.5 g of termite mound is added to 30 mL of 40 mg L−1 CR for 60 min−1 at 400 rpm. The decolorization of CR increases with an increase in the termite mound dosage, contact time, stirring speed, pH, and temperature; however, the adsorption capacity decreases with an increase in the initial CR concentration. The adsorption process shows that CR obeys the Freundlich adsorption model with a 0.9355 coefficient of regression, denoting multilayer formation onto the termite mound. The adsorption kinetics follow the pseudo‐second‐order model with a coefficient of regression value of 0.9966, showing that chemisorption is the main rate limiting step. ΔG is negative, an indication that the adsorption of CR onto termite mound is spontaneous. Approximately 86.6% chemical oxygen demand reduction is achieved with real textile wastewater. This study shows how termite mound can be harnessed for the treatment of textile wastewater before discharged into the environment.

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“…The negative values of DG for different temperatures show that the adsorption on the composite is a favorable and spontaneous process [53]. In addition, the results of DG are between À20 kJ/mol and 0, reflecting that the adsorption reaction is of physisorption [54]. The negative values of DS indicate that the randomness at the solid/solution interface decreases gradually accompanied by the creation of an affinity of H 6 P 2 W 18 O 62 @Cu 3 (BTC) 2 towards MB [55,56].…”

Section: Thermodynamic Studymentioning

confidence: 91%

Removal of methylene blue from aqueous solutions by an adsorbent based on metal-organic framework and polyoxometalate

Liu

Luo

Zhu

et al. 2015

Journal of Alloys and Compounds

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Adsorption removal of Congo red from aqueous solution by polyhedral Cu2O nanoparticles: Kinetics, isotherms, thermodynamics and mechanism analysis

Cited by 185 publications

References 60 publications

The synthesis of mesostructured NH2-MIL-101(Cr) and kinetic and thermodynamic study in tetracycline aqueous solutions

The synthesis of mesostructured NH2-MIL-101(Cr) and kinetic and thermodynamic study in tetracycline aqueous solutions

Accelerated Decolorization of Congo Red by Powdered Termite Mound

Removal of methylene blue from aqueous solutions by an adsorbent based on metal-organic framework and polyoxometalate

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