Post functionalization of carboxymethylated starch and acrylonitrile based networks through amidoximation for use as ion sorbents

Chauhan, Ghanshyam S.; Jaswal, Saroj Chauhan; Verma, Monika

doi:10.1016/j.carbpol.2006.03.030

Cited by 36 publications

(20 citation statements)

References 14 publications

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“…The results are of technical interest because at lower temperatures these hydrogels exhibit higher efficiency. The same phenomenon was also observed by another group [15]. At higher temperatures, metal ions have higher velocity and activation energy.…”

Section: Effect Of Temperature On Heavy-metal Ion Adsorptionsupporting

confidence: 69%

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Synthesis of polyacrylate/polyethylene glycol interpenetrating network hydrogel and its sorption of heavy-metal ions

Tang

Sun

et al. 2009

Science and Technology of Advanced Materials

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A simple two-step aqueous polymerization method was introduced to synthesize a polyacrylate/polyethylene glycol (PAC/PEG) interpenetrating network (IPN) hydrogel. On the basis of the effects of the ratio of PAC to PEG, neutralization degree, heavy-metal ion concentration, and temperature on the adsorption behavior of PAC/PEG IPN hydrogel toward Ni 2+ , Cr 3+ and Cd 2+ , the preparation conditions were optimized. In our system, the greatest amount of Ni 2+ , Cr 3+ and Cd 2+ adsorbed were 102.34, 49.38 and 33.41 mg g −1 , respectively. The adsorption abilities of a dried PAC/PEG composite and a swollen PAC/PEG IPN hydrogel were compared. It was found that the efficiency of removing metal ions using the swollen hydrogel was greater than that using the dried composite. The adsorption mechanism and model are also discussed.

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Section: Effect Of Temperature On Heavy-metal Ion Adsorptionsupporting

confidence: 69%

“…The residual solutions were analyzed to determine the concentration of rejected ions by a spectrophotometrical method using EDTA and a UV-vis spectrophotometer (Shimadzu Corporation, Japan) [15]. The amount of adsorbed heavy-metal ions was determined using…”

Section: Heavy-metal Ion Adsorptionmentioning

confidence: 99%

Synthesis of polyacrylate/polyethylene glycol interpenetrating network hydrogel and its sorption of heavy-metal ions

Tang

Sun

et al. 2009

Science and Technology of Advanced Materials

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“…Sawdust of Pinus sylvestris pre-treated with formaldehyde showed enhanced biosorption for the removal of Cd(II) and Pb(II) from aqueous solutions [195]. HCl treated sawdust of Mulberry showed a maximum biosorption capacity of 403.73 mg/g for Cd(II) ions at pH of 6 after a 30 min shaking [196]. Different complexing groups like the aminoalkyl [197], 2,2-diaminoethyl, and amidoxime [198], or an ionic moiety such asphosphate [199], thiolate [200], carboxy [201], and carboxymethyl [202,203] were also used for modification of various biomass so as to enhance their biosorption for heavy metal ion.…”

Section: Design Of Better Biosorbentsmentioning

confidence: 97%

Bioadsorbents for remediation of heavy metals: Current status and their future prospects

Gupta

Nayak

Agarwal

2015

Environmental Engineering Research

726

203

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The biosorption process has been established as characteristics of dead biomasses of both cellulosic and microbial origin to bind metal ion pollutants from aqueous suspension. The high effectiveness of this process even at low metal concentration, similarity to ion exchange treatment process, but cheaper and greener alternative to conventional techniques have resulted in a mature biosorption technology. Yet its adoption to large scale industrial wastewaters treatment has still been a distant reality. The purpose of this review is to make in-depth analyses of the various aspects of the biosorption technology, staring from the various biosorbents used till date and the various factors affecting the process. The design of better biosorbents for improving their physico-chemical features as well as enhancing their biosorption characteristics has been discussed. Better economic value of the biosorption technology is related to the repeated reuse of the biosorbent with minimum loss of efficiency. In this context desorption of the metal pollutants as well as regeneration of the biosorbent has been discussed in detail. Various inhibitions including the multi mechanistic role of the biosorption technology has been identified which have played a contributory role to its non-commercialization.

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“…The peaks observed at 2921/ cm can be assigned to stretching vibration of the C-H group. The absorption peaks at 1734, 1643 and 1036/cm are associated with the presence of C=O, C=C and C-O, respectively (Cardenas and Miranda, 2004;Chauhan et al, 2006). The EDX spectrum obtained for tassel is shown in Fig.…”

Section: Ftir and Edx Analysis Of Adsorbentmentioning

confidence: 99%

A novel adsorbent for heavy metal remediation in aqueous environments

Zvinowanda

Okonkwo

Shabalala³

et al. 2009

Int. J. Environ. Sci. Technol.

138

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ABSTRACT:The objective of this study was to investigate the possibility of using maize tassel as an alternative adsorbent for the removal of chromium (VI) and cadmium (II) ions from aqueous solutions. The effect of pH, solution temperature, contact time, initial metal ion concentration and adsorbent dose on the adsorption of chromium (VI) and cadmium (II) by tassel was investigated using batch methods. Adsorption for both chromium (VI) and cadmium (II) was found to be highly pH dependent compared to the other parameters investigated. Obtained results gave an adsorption capacity of 79.1 % for chromium (VI) at pH 2, exposure time of 1h at 25 ºC. Maximum capacity of cadmium of 88 % was obtained in the pH range of 5-6 at 25 ºC after exposure time of 1 h. The adsorption capacities of tassel for both chromium (VI) and cadmium (II) were found to be comparable to those of other commercial adsorbents currently in use for the removal of heavy metals from aqueous wastes. These results have demonstrated the immense potential of maize tassel as an alternative adsorbent for toxic metal ions remediation in polluted water and wastewater.

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Post functionalization of carboxymethylated starch and acrylonitrile based networks through amidoximation for use as ion sorbents

Cited by 36 publications

References 14 publications

Synthesis of polyacrylate/polyethylene glycol interpenetrating network hydrogel and its sorption of heavy-metal ions

Synthesis of polyacrylate/polyethylene glycol interpenetrating network hydrogel and its sorption of heavy-metal ions

Bioadsorbents for remediation of heavy metals: Current status and their future prospects

A novel adsorbent for heavy metal remediation in aqueous environments

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