Equilibrium Studies of the Sorption of Cu(II) Ions onto Chitosan

The need to design low-cost adsorbents for the detoxification of industrial effluents has been a growing concern for most environmental researchers. So modelling of experimental data from adsorption processes is a very important means of predicting the mechanisms of various adsorption systems. Therefore, this paper presents an overall review of the applications of adsorption isotherms, the use of linear regression analysis, nonlinear regression analysis, and error functions for optimum adsorption data analysis.

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“…A plot of ln( / ) versus ln enables the determination of Redlich-Peterson constants, where is slope and is intercept [30,[42][43][44][45].…”

Section: Redlich-petersonmentioning

confidence: 99%

Modelling and Interpretation of Adsorption Isotherms

Ayawei

Ebelegi

Wankasi

2017

Journal of Chemistry

1,775

885

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“…It is a costeffective biosorbent for treating wastewater containing heavy metal and organic contaminants [11][12][13]. A series of studies revealed that chitosan had a higher adsorptive capacity for copper [14,15]. Few studies have been reported on the adsorption of tetracycline.…”

mentioning

confidence: 99%

Systematic study of synergistic and antagonistic effects on adsorption of tetracycline and copper onto a chitosan

Kang

Liu

Zheng

et al. 2010

Journal of Colloid and Interface Science

233

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a b s t r a c tSorption of tetracycline and copper onto chitosan is systematically investigated in this study. The sorption of tetracycline and copper occurs rapidly in the first few hours and 90% of completed uptake occurs in the first 11-12 and 6 h, respectively. The sorption equilibrium of both contaminants is established in 24 h. The solution pH largely affects the sorption of both contaminants. The tetracycline uptake increases as pH is increased from 2.8 to 5.6, and 2.5 to 7 in the absence and the presence of copper, respectively. The presence of copper significantly improves the tetracycline adsorption likely due to the formation of cationic bridging of copper between tetracycline and chitosan. The maximum adsorption capacity and the adsorption affinity constant for tetracycline dramatically increase from 53.82 to 93.04 mmol kg À1 and from 1.22 to 10.20 L mmol À1 as the copper concentration is increased from 0 to 0.5 mmol L À1. The uptake of copper increases with an increase in pH from around 3.5-6.0 in the absence and the presence of tetracycline. The presence of tetracycline decreases the copper adsorption, which may be ascribed to the competition of tetracycline with copper ions for the adsorption sites at the chitosan surface. The adsorption isothermal data of both tetracycline and copper are fit well by the Langmuir equation. The maximum adsorption capacity and adsorption affinity constant of copper ions decrease from 1856.06 to 1486.20 mmol kg À1 and from 1.80 to 1.68 L mmol À1 in the absence and the presence of tetracycline. FTIR and XPS studies reveal that amino, hydroxyl, and ether groups in the chitosan are involved in the adsorption of tetracycline and copper.

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“…They are many fields of their applications, such as urban water waste treatment, ecology, agriculture, medicine, etc. [1]- [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Friendly Sorbents on Base Polymer Nanocomposites

Olekhnovich¹,

Gusev²,

Ishevskiy³

et al. 2017

WIT Transactions on Ecology and the Environment

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Clay-based superabsorbents were synthesized using sodium bentonite via radical copolymerization of acrylic acid and acrylamide at temperatures between 30°C and 45°C. Ammonium persulphate -tetramethylethylenediamine was used as an initiator oxidation-reduction system, and N,N'-methylene-bis-acrylamide as the cross-linked agent. The swelling behaviour of clay-based superabsorbent samples in aqueous solutions at different temperatures was investigated. The sorption processes of nickel ions from aqueous solutions were studied. It has been shown to influence the proportion of bentonite sorption kinetics of nickel ions from aqueous solutions of different concentrations. Clay-containing polymer composites can be used as friendly materials for wastewater treatment.

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Equilibrium Studies of the Sorption of Cu(II) Ions onto Chitosan

Cited by 380 publications

References 14 publications

Modelling and Interpretation of Adsorption Isotherms

Modelling and Interpretation of Adsorption Isotherms

Systematic study of synergistic and antagonistic effects on adsorption of tetracycline and copper onto a chitosan

Effect of Friendly Sorbents on Base Polymer Nanocomposites

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