Enhanced swelling and adsorption properties of AAm‐AMPSNa/clay hydrogel nanocomposites for heavy metal ion removal

Kaşgöz, Hasine; Durmuş, Ali; Kaşgöz, Ahmet

doi:10.1002/pat.999

Cited by 205 publications

(67 citation statements)

References 31 publications

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“…The polymer/clay hydrogel composite has received great attention because of its relatively low production cost and high adsorption capacity for some dyes and metal ions (Li and Wang 2005;Ekici et al 2006;Kaşgöz et al 2008;Kundakcı et al 2008Kundakcı et al , 2009Gu and Ye 2009;Güçlü et al 2010;Mahdavinia and Asgari 2013). To reduce costs and * Author for correspondence (ekaradag@adu.edu.tr) improve the comprehensive water-absorbing properties of superabsorbent materials based on acrylic monomers, grafting acrylic monomers onto clay and fabricating a composite consisting of a polymer and clay is a priority (Li and Wang 2005;Ekici et al 2006;Kaşgöz et al 2008;Kundakcı et al 2008Kundakcı et al , 2009Gu and Ye 2009;Güçlü et al 2010;Mahdavinia and Asgari 2013).…”

Section: Introductionmentioning

confidence: 99%

Novel composite sorbent AAm/MA hydrogels containing starch and kaolin for water sorption and dye uptake

et al. 2014

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A novel polymer/clay composite sorbent based on acrylamide/maleic acid, starch and clay such as kaolin was synthesized with free radical solution polymerization by using ammonium persulfate/N,N,N ,Ntetramethylethylenediamine as redox initiating pair in the presence of poly(ethylene glycol)diacrylate as a crosslinker. Surface morphology was characterized by the scanning electron microscopy technique. FT-IR analysis was used to identify the presence of different repeating units in the semi-interpenetrating polymer networks (semi-IPNs). Some swelling and diffusion characteristics were calculated for different semi-IPNs and hydrogels prepared under various formulations. The hydrogels were used in experiments on sorption of water-soluble cationic dye such as toluidine blue. Sorption of toluidine blue into the polymeric systems was studied by the batch sorption technique at 25 • C. Water uptake and dye sorption properties of the crosslinked polymeric systems were investigated as a function of chemical composition of the hydrogels.

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Section: Introductionmentioning

confidence: 99%

Novel composite sorbent AAm/MA hydrogels containing starch and kaolin for water sorption and dye uptake

et al. 2014

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“…For instance, Tassanapayak et al [12] investigated the efficiency of clay in heavy ion sorption and found that it can be utilized as potential heavy metal adsorbents in wastewater treatment. Hasine et al [13] also studied the role of clay properties in heavy metal ion sorption and desorption with a series of experiments and found that soil composition would greatly affect the sorption efficiency. Li et al [14] pointed out that once the clay is contaminated, it is very difficult and it will take a very long time to remove the pollutants.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Adsorption and Desorption of Cu(II) in Silty Clay

Xie

Wen

et al. 2018

Geofluids

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Heavy metals such as Cu(II) are widespread in the environment, and the impact of heavy metals on the environment of soils depends on the ability of soils to immobilize these pollutants. It is necessary to investigate the mechanism of interaction between heavy metal and soil from a soil remediation perspective. In this study, a series of experiments were conducted to investigate the adsorption and desorption behavior of Cu(II) in silty clay. Several impact factors such as pH, organic matter, temperature, and coexisted ions Zn(II) were considered. It was found that the adsorption process reached equilibrium after 4 hours of the experiment, and the data can be fitted well by the Elovich model and the double-constant model for the kinetic sorption process. The isothermal adsorption results showed that the adsorption rate reached a peak value when the initial concentration was about 20 mg L −1 . The decrease of H + can increase the adsorption activity of Cu(II) and reduce the ability of the desorption of Cu(II) ions. The adsorption capacity of Cu(II) is less than the desorption capacity under the condition of strong acidity and low concentration of Cu(II). In addition, the adsorption capacity of the native soil on Cu(II) was larger than that of the soil with the removal of organic matter, while the opposite was true for the desorption capacity on Cu(II). The maximum adsorption of Cu(II) occurred at 35°C for this study, and the binding energy increased as the temperature increased. Thermodynamic analysis revealed that the adsorption process of Cu(II) was spontaneous and endothermic. The Freundlich, Langmuir, Temkin, and Henry adsorption models were used for analyzing the adsorption isotherm of Cu(II), and it was found that the Freundlich model agreed the best with the experimental data compared with other three models. The results of the competitive adsorption experiments indicated that the competitive capacity of Cu(II) was greater than that of Zn(II) in low-permeability media such as silty clay, and the existence of binary metals can weaken the adsorption force between the single metal and the soil surface.

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“…Superabsorbent composites are one group of such materials, in which the polymer matrix consists of hydrophilic polymers, mainly of poly(acrylic acid) (PAA) [17] and its salts [18], poly(acrylamide) [19,20], 2-methylpropane sulfonic acid (AMPS), and their copolymers [21,22]. These hybrid materials, due to their functional groups, are efficient adsorbents of heavy metals cations (e.g., Pb 2?…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe3+ ions present in the structure of poly(acrylic acid)/montmorillonite composites on their thermal decomposition

Natkański

Kuśtrowski

Białas

et al. 2013

J Therm Anal Calorim

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Poly(acrylic acid)/montmorillonite (MMT) composites with various polymer contents were synthesized by in situ polymerization technique. The structure of obtained materials was characterized by powder X-ray diffraction and infrared spectroscopy (FTIR). It was found that only a limited amount of hydrogel could be introduced between the clay layers. The remaining part of polymer was deposited on the external surface of clay particles. The introduction of the polymer modifier significantly increased the adsorption capacity of MMT in the elimination of Fe 3?ions from aqueous solution. The thermal behavior of the samples before and after the Fe 3? adsorption was examined by thermogravimetry and differential thermal analysis. Moreover, the composition of gaseous products evolved during decomposition was determined by FTIR. The materials after Fe 3? adsorption exhibited different thermal stability in oxidizing atmosphere than the fresh samples. Fe 3? cations, forming FeO x species during thermal treatment, appeared to be effective catalysts of polymer oxidation.

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Enhanced swelling and adsorption properties of AAm‐AMPSNa/clay hydrogel nanocomposites for heavy metal ion removal

Cited by 205 publications

References 31 publications

Novel composite sorbent AAm/MA hydrogels containing starch and kaolin for water sorption and dye uptake

Novel composite sorbent AAm/MA hydrogels containing starch and kaolin for water sorption and dye uptake

An Experimental Study on the Adsorption and Desorption of Cu(II) in Silty Clay

Effect of Fe3+ ions present in the structure of poly(acrylic acid)/montmorillonite composites on their thermal decomposition

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