Kinetics and thermodynamics of Pb sorption onto bentonite and poly(acrylic acid)/bentonite hybrid sorbent

Rafiei, Hamid Reza; Shirvani, Mehran; Ogunseitan, Oladele A.

doi:10.1080/19443994.2015.1130655

Cited by 7 publications

(2 citation statements)

References 51 publications

(104 reference statements)

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“…With the same charge and coordination number, metal sorption corresponds to the following series in terms of the radius size and the atomic mass: Pb +2 >Cd +2 >Zn +2 >Cu +2 >Ni +2 >F e+2 . The decrease in sorption capacity in a neutral medium (pH = 4-6) corresponds to the following series: Cu +2 >Fe +2 >Zn +2 >Ni +2 >Cd +2 >Pb +2 [12,13] The sorption capacity of PMAA-based gels are lower, which is attributed to their lower swelling capacity of PMAA [14] and a higher degree of ionization of the PAA, therefore the ability of the latter to electrostatically bind the metal ions is higher. Polycarboxylic acids make a significant contribution to the sorption capacity of composites, and the presence of BC in the composite additionally increases the degree of metal ions sorption.…”

Section: Resultsmentioning

confidence: 99%

Sorption of Heavy Metal Ions by Composite Materials Based on Polycarboxylic Acids and Bentonite Clay

Zhumagaliyeva

Iminova

Kairalapova

et al. 2021

Eurasian Chem. Tech. J.

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The paper shows the study results of sorption capacities of composite gels based on polyacrylic and polymethacrylic acids with bentonite clay as the mineral filler concerning heavy metal ions (Pb+2, Cu+2, Ni+2, Zn+2, Fe+2, Cd+2). The binding of metal ions to gels occurs through the formation of electrostatic bonds between the charged surface of bentonite clay and ionogenic functional groups of polymers in the composition, as well as the coordination bonds between metal ions and unshared pairs of oxygen electrons in the functional groups of polymers. The gel swelling degree decreases in metal solutions with increasing metals concentration and the content of BC in the composite. The sorption and desorption of heavy metal ions from the polymer-clay composites from model solutions and samples of industrial wastewater from the Kazakhstani metallurgical plants were evaluated. The adjustment of the pH, the temperature of the medium and the clay content in the composite leads to increasing the degree of sorption and achieving regeneration of the used composite gels in certain media. The data obtained testify to the prospects of using these composites as effective sorbents of heavy metals from industrial wastewaters expanding the range of composite materials for wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Sorption of Heavy Metal Ions by Composite Materials Based on Polycarboxylic Acids and Bentonite Clay

Zhumagaliyeva

Iminova

Kairalapova

et al. 2021

Eurasian Chem. Tech. J.

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“…It was stated that the superior capacity and affinity of PAA-Bent nanocomposite towards Pb(II) were probably due to the complex formation between the polymer carboxyl groups and Pb(II) ions. The kinetics and thermodynamics of Pb(II) adsorption onto bentonite and PAAc-Bent adsorbent were also investigated by the same research group in another study [24]. Batch-type adsorption experiments were conducted at different times, Pb(II) concentrations and temperatures.…”

Section: Poly(acrylic Acid) (Paac)mentioning

confidence: 99%

The Use of Acrylic-Based Polymers in Environmental Remediation Studies

Yayayürük¹

2017

Acrylic Polymers in Healthcare

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Heavy metals are not biodegradable and tend to accumulate in living organisms. Many heavy metal ions are known to be toxic or carcinogenic. Thus, removal of these toxic heavy metals from water is of crucial importance to protect the human population and the environment. In recent years, polymeric adsorbents have received considerable interest for heavy metal removal mainly due to important technological and scientific developments such as easy synthesis at controlled dimensions with variable functional groups, perfect mechanical rigidity, tunable surface chemistry, large surface area, pore size distribution, high uptake values and feasible regeneration under mild conditions. This chapter has attempted to present to the readers the widespread investigations of acrylic-based polymeric adsorbents so that the reader can get an idea about the various types and forms of polymeric materials used for the removal of heavy metals from water.

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Adsorption of diethyl and dibutyl phthalates onto activated carbon produced from Albizia julibrissin pods: kinetics and isotherms

Bouhamidi

Kaouah

Nouri

et al. 2016

Int. J. Environ. Sci. Technol.

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Kinetics and thermodynamics of Pb sorption onto bentonite and poly(acrylic acid)/bentonite hybrid sorbent

Cited by 7 publications

References 51 publications

Sorption of Heavy Metal Ions by Composite Materials Based on Polycarboxylic Acids and Bentonite Clay

Sorption of Heavy Metal Ions by Composite Materials Based on Polycarboxylic Acids and Bentonite Clay

The Use of Acrylic-Based Polymers in Environmental Remediation Studies

Adsorption of diethyl and dibutyl phthalates onto activated carbon produced from Albizia julibrissin pods: kinetics and isotherms

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