Competitive Removal of Heavy Metal Ions by Starch-Graft-Acrylic Acid Copolymers

Keleş, Sibel; Güçlü, Gamze

doi:10.1080/03602550600553291

Cited by 50 publications

(26 citation statements)

References 19 publications

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“…Therefore, lower pH values than 6 are not suitable for adsorption studies because carboxyl groups of these beads are non-ionized form and, the optimal pH value was determined as "6" according to the preliminary adsorption studies, which were carried out at different pH values. This result was compatible with other results given in the literature [4,11,12]. As it is seen also from the grafting mechanism, which is schematized in Fig.…”

Section: Adsorption Studiessupporting

confidence: 95%

“…Since adsorption method is highly effective, inexpensive and easy to operate, it is widely preferred for water treatment processes [10]. In recent years, polymeric adsorbents have been used to remove heavy metal ions and basic dyes from waste waters [4][5][6][7][11][12][13][14][15]. In parallel, the use of natural polymers (e.g., cellulose, starch, chitosan, and alginate) and their derivatives for the removal of heavy metal ions from wastewater has become important by reason of their biodegradability [2].…”

Section: Introductionmentioning

confidence: 99%

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Study on adsorption, regeneration, and reuse of crosslinked chitosan graft copolymers for Cu(II) ion removal from aqueous solutions

Bal

Özkahraman

Acar

et al. 2014

Desalination and Water Treatment

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A B S T R A C TThis study deals with the adsorption, regeneration, and reuse of chitosan-graft-itaconic acid and chitosan-graft-crotonic acid beads for Cu(II) ion removal from aqueous solutions. For this aim, adsorption capacities, adsorption kinetics, and adsorption isotherms of these crosslinked chitosan-graft-copolymeric beads were investigated in detail. The maximum adsorption capacities of chitosan-graft-itaconic acid and chitosan-graft-crotonic acid beads were found to be 0.31 and 0.25 mmol/g, respectively. In addition, it was found that the pseudosecond-order kinetic model is more suitable than pseudo-first-order model for the adsorption of Cu(II) ions onto the beads according to adsorption kinetics data. Adsorption isotherm data were evaluated using Freundlich, Langmuir, Brauner-Emmet-Teller, Dubinin-Radushkevich and Temkin isotherm models. The results revealed that the adsorption of Cu(II) ions onto the beads fits very well Freundlich isotherm model. Then, the beads were regenerated with an acid solution, and they were reused for adsorption of Cu(II) ions. Regeneration study results showed that, the metal ion removal capacity of regenerated beads did not change significantly in the end of the fourth regeneration period compared to the first regeneration period. It was concluded that the crosslinked chitosan-graft-copolymeric beads might be suitable adsorbent for the removal of metal ions from aqueous effluent.

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Section: Adsorption Studiessupporting

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Study on adsorption, regeneration, and reuse of crosslinked chitosan graft copolymers for Cu(II) ion removal from aqueous solutions

Bal

Özkahraman

Acar

et al. 2014

Desalination and Water Treatment

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“…In order to increase uptake capacity and removal selectivity of heavy metal ions, biosorbent derivates have been prepared as a kind of weak acid adsorbent by grafting acrylic acid on polysaccharide backbone [7,8]. But this method has some problems.…”

Section: Introductionmentioning

confidence: 99%

Removal of copper and lead from aqueous solution by carboxylic acid functionalized deacetylated konjac glucomannan

Liu¹,

Luo²,

Lin³

et al. 2009

Journal of Hazardous Materials

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“…The results are given in Table 1 (see runs [1][2][3][4]. For example, the maximum graft yield (38.3%) was obtained at the initiator concentration of 3 × 10 -3 mol/l (see run 3 in Table 1).…”

Section: Concentration Of Initiatormentioning

confidence: 99%

“…Vinyl monomers, such as vinyl chloride [2], acrylic acid [3,4], methyl methacrylate [5], and acrylamide [6][7][8], can be grafted onto starch by various techniques. There are also some studies concerned with grafting vinyl acetate (VAc) onto starch in the literature.…”

Section: Introductionmentioning

confidence: 99%

Graft copolymerization of poly(vinyl acetate) onto starch using KMnO4-H2SO4 redox system

Niu

2013

Journal of Polymer Engineering

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The graft copolymerization of poly(vinyl acetate) [poly(VAc)] onto starch was studied using the KMnO 4 -H 2 SO 4 redox system. The grafting parameters are favored by changing the concentration of KMnO 4 , the concentration of acid, the temperature, the time, and the concentration of monomer. A maximum graft yield of 38.3% was obtained at optimum conditions: KMnO 4 concentration = 3.0 × 10 -3 mol/l, concentration of acid = 1.5 × 10 -2 mol/l, temperature = 40°C, time = 3 h, and concentration of monomer = 1 mol/l. The grafting of poly(VAc) onto starch was confirmed by the IR spectra of pure sago starch, poly(VAc), and poly(VAc) grafted starch. Both swelling power and solubility increased with the increase in temperature. Graft copolymerization increased swelling power and reduced solubility. This material may have use as an application as a biodegradable plastic.

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Competitive Removal of Heavy Metal Ions by Starch-Graft-Acrylic Acid Copolymers

Cited by 50 publications

References 19 publications

Study on adsorption, regeneration, and reuse of crosslinked chitosan graft copolymers for Cu(II) ion removal from aqueous solutions

Study on adsorption, regeneration, and reuse of crosslinked chitosan graft copolymers for Cu(II) ion removal from aqueous solutions

Removal of copper and lead from aqueous solution by carboxylic acid functionalized deacetylated konjac glucomannan

Graft copolymerization of poly(vinyl acetate) onto starch using KMnO4-H2SO4 redox system

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