Effective removal of divalent metal ions: synthesis and characterization of pH-sensitive guar gum based hydrogels

Hiremath, Jagadish N.; Vishalakshi, B.

doi:10.1080/19443994.2014.991757

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…Chitosan has shown a high affinity for the sorption of metal ions through chelation of metal cations in near-neutral solutions and electrostatic attraction/ion exchange mechanisms in acidic solutions for the binding of metal anions [44][45][46][47][48]. Guar gum has also retained a great attention in the last decades for synthesizing metal-binding composite hydrogels [49][50][51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

et al. 2021

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The development of new materials is needed to address the environmental challenges of wastewater treatment. The phosphorylation of guar gum combined with its association to chitosan allows preparing an efficient sorbent for the removal of U(VI) from slightly acidic solutions. The incorporation of magnetite nanoparticles enhances solid/liquid. Functional groups are characterized by FTIR spectroscopy while textural properties are qualified by N2 adsorption. The optimum pH is close to 4 (deprotonation of amine and phosphonate groups). Uptake kinetics are fast (60 min of contact), fitted by a pseudo-first order rate equation. Maximum sorption capacities are close to 1.28 and 1.16 mmol U g−1 (non-magnetic and magnetic, respectively), while the sorption isotherms are fitted by Langmuir equation. Uranyl desorption (using 0.2 M HCl solutions) is achieved within 20–30 min; the sorbents can be recycled for at least five cycles (5–6% loss in sorption performance, complete desorption). In multi-component solutions, the sorbents show marked preference for U(VI) and Nd(III) over alkali-earth metals and Si(IV). The zone of exclusion method shows that magnetic sorbent has antibacterial effects against both Gram+ and Gram- bacteria, contrary to non-magnetic material (only Gram+ bacteria). The magnetic composite is highly promising as antimicrobial support and for recovery of valuable metals.

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Section: Introductionmentioning

confidence: 99%

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

et al. 2021

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“…One of the possible mechanisms followed in water purification is adsorption. For this, numbers of fillers and chemical modifications have been investigated to achieve required application in water remediation program [64], [65], [66], [67], [68], [69], [70], [71], [72]. Table 1 shows (Figure 2a).…”

Section: Guar Gum Based Hydrogels For Water Purificationmentioning

confidence: 99%

Recent approaches in guar gum hydrogel synthesis for water purification

Thakur

Sharma

Verma

et al. 2018

International Journal of Polymer Analysis and Characterization

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Guar gum based hydrogels have evoked great attention in research as well as in industry for exploring miscellaneous applications in the field of water purification, medicine, agriculture, explosives, cosmetics, textile, paper and food to name a few. In this article, latest modifications for developing guar gum based hydrogels and composite materials for water purification application are extensively reviewed. Regenerative nature of Guar gum hydrogels makes it a better choice for treating waste water as well as other value added applications. Moreover, non-ionic nature makes guar gum an acceptable material for further modifications. In this article, we also presents brief discussion on structure and properties of guar gum.

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Chemical modification of xanthan gum through graft copolymerization: Tailored properties and potential applications in drug delivery and wastewater treatment

Maji

Maiti

2021

Carbohydrate Polymers

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Effective removal of divalent metal ions: synthesis and characterization of pH-sensitive guar gum based hydrogels

Cited by 5 publications

References 31 publications

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

Recent approaches in guar gum hydrogel synthesis for water purification

Chemical modification of xanthan gum through graft copolymerization: Tailored properties and potential applications in drug delivery and wastewater treatment

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