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Graphite modified sodium alginate hydrogel composite for efficient removal of malachite green dye.

Abstract：

:Herein, porous sodium alginate/graphite based hybrid hydrogel was fabricated as an effective adsorbent for organic pollutant. Sodium alginate was modified through graft polymerization of acrylic acid and subsequently loaded with graphite powder to enhance its adsorption capability. The synthesized sodium alginate cross-linked acrylic acid/graphite (NaA-cl-AAc/GP) hydrogel composite was utilized in the removal of malachite green (MG) dye from aqueous solution using batch adsorption experiments. The NaA-cl-AAc/GP hydrogel composite was characterized by infrared spectroscopy, Raman spectroscopy, thermo-gravimetric analysis, scanning electron microscopy, x-ray photoelectron spectroscopy and x-ray diffraction. Under optimized experimental conditions, a maximum adsorption capacity of 628.93 mg g-1 was attained for malachite green dye. Moreover, the adsorption process could be well described by the Langmuir isotherm model and pseudo-second-order kinetic model. The hydrogel composite also showed 91% adsorption after three consecutive cycles of dye adsorption-desorption. Therefore, the NaA-cl-AAc/GP hydrogel composite is a potentially favourable material towards dye pollution remediation owing to its better swelling rate, environment friendliness, high adsorption potential and regeneration capability.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Verma A,Thakur S,Mamba G,Prateek,Gupta RK,Thakur P,Thakur VK

doi

10.1016/j.ijbiomac.2020.01.142

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

1130-1139

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(19)36238-5

journal_volume

148

pub_type

杂志文章

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