Removal of Brilliant Green from wastewater using conventional and ultrasonically prepared poly(acrylic acid) hydrogel loaded with kaolin clay: A comparative study

Shirsath, Sachin R.; Anup, Patil; Patil, Rajendra D.; Naik, Jitendra; Gogate, Parag R.; Sonawane, Shirish H.

doi:10.1016/j.ultsonch.2012.11.010

Cited by 147 publications

(55 citation statements)

References 43 publications

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“…[24] These factors, in addition to the economic and environmental benefits of a material that typically consists of at least 90% water by mass, make polymer hydrogels particularly appealing as substrates for dye adsorption. Synthetic polymers including poly(2-hydroxyethylmethacrylate), [25] poly [2-(methacryloyloxy)ethyl]trimethylammonium chloride [26] and poly(N,N-diethylamino ethyl methacrylate), [27] copolymers including poly(vinyl alcohol)-block-poly(ether amine) [28] and poly(acrylic acid-co-acrylamide), [29] and claymodified poly(acrylic acid) [30] and poly(N-isopropylacrylamide)-based hydrogels [31] have independently been employed for targeted dye adsorption.…”

Section: Introductionmentioning

confidence: 99%

Chitosan hydrogels for targeted dye and protein adsorption

Boardman

Lad

Green

et al. 2017

J of Applied Polymer Sci

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There is an urgent requirement to devise and develop highly-effective materials for the purification of industrial wastewater. Coloured effluents are particularly problematic due to their toxicity in plants, aquatic organisms and animals, dictating that polymeric adsorbents are highly sought for their capture.Chitosan hydrogels are a cost-effective substrate for the adsorption of dye molecules as they are contain a biopolymeric gelator that can form hydrogels with a polymer content as low as 3% by mass. Such materials are also highly suited for use within a biomedical context as carrier vehicles for the encapsulation and delivery of protein macromolecules, due to their hydrophilic nature. We disclose the capability chitosan-based hydrogels to non-covalently adsorb both reactive and disperse dye molecules, and a model anionic protein from aqueous solution. The materials generated offer both a platform for dye removal from industrial wastewater, and for the encapsulation and pH-mediated release of protein macromolecules.

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Section: Introductionmentioning

confidence: 99%

Chitosan hydrogels for targeted dye and protein adsorption

Boardman

Lad

Green

et al. 2017

J of Applied Polymer Sci

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“…Studies on the removal of BG dye include adsorption using modified kaolin clay [17], combinations of sonolysis, photolysis and microwave processes [18], ozonation using micro-bubbles [19] and Fenton-like process (Fe 3? /H 2 O 2 ) [20].…”

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confidence: 99%

Studies on pH-dependent color variation and decomposition mechanism of Brilliant Green dye in Fenton reaction

et al. 2015

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Degradation of Brilliant Green (BG) dye has been studied using Fenton reagent in the dark environment. The intensity of dye color was pH dependent with maximum absorbance at pH 6. N-de-alkylation caused dye decomposition which resulted in the reduction of absorbance. The rate of BG dye decolorization increased with an increase in the H 2 O 2 and Fe 2? concentration. The presence of background ions commonly found in an industrial dyeing wastewater suppressed the efficiency of color, COD and TOC removal within 9 %. There was about 2.9-fold increase in biodegradability index after 30 min of reaction. The proposed mechanism showed the routes of dye degradation with low errors (-0.88 to 0.49 g mol -1 ) with respect to the exact mass. Dye degradation began with Nde-ethylation, and later was further cleaved to aromaticamine, -acid, -alcohol and -additive products. Hydroquinone was originated by hydroxylation of N,N-diethyl aniline. An equilibrium cycle among quinone, hydroquinone and Fe(III)-hydroquinone was exhibited through the formation of charge transfer complex.

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“…[32] As reported by Porter, the cellulose substrate was considered as heterogeneous material with several accessible regions in which dye molecules can be hosted. [33] Surprisingly, if on one hand by using OPP in neutral medium the adsorption did not take place, on the other hand the use of electrolytes as NaCl and Na2SO4 favor the adsorption process also at pH 6. Fig.…”

Section: Effect Of Saltsmentioning

confidence: 99%