A study on adsorption behavior of newly synthesized banana pseudo-stem derived superabsorbent hydrogels for cationic and anionic dye removal from effluents

Bello, Kabiru; Sarojini, B. K.; Narayana, B.; Rao, Anjali; Byrappa, K.

doi:10.1016/j.carbpol.2017.11.106

Cited by 137 publications

(36 citation statements)

References 38 publications

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“…The main raw material i.e. CMC was made in our laboratory as reported [28], the preparation of performed via copolymerization of poly (ATAC-co-NaAc) on CMC using (APS) and (MBA) as initiator and cross linker respectively. In a typical reaction, 0.5 g of CMC was taken in a beaker containing 20 mL of distilled water with stirring for 10 h to get clear solution.…”

Section: General Procedures For the Preparation Of Cmc-g-poly (Atac-comentioning

confidence: 99%

Nitrate/Nitrite determination in water and soil samples accompanied by in situ azo dye formation and its removal by superabsorbent cellulose hydrogel

et al. 2020

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In the present work, an efficient method is developed for the spectrophotometric determination of nitrite and nitrate ions in water and soil samples by in situ formation of azo dye (Griess reagent) which showed λ max at 385 nm. The reaction condition and the concentration of reagents used are optimized. The molar absorptivity, Sandell's sensitivity, detection limit and quantification limit of the method are found to be 3.22 × 10 4 L mol −1 cm −1 , 1.98 × 10 −6 µg cm −2 , 0.0030 µg mL −1 and 0.0092 µg mL −1 respectively with the linearity range up to 2.6 µg mL −1. The formation of azo dye is confirmed by 1 H and 13 C Nuclear Magnetic Spectroscopy. The azo dye formed during the determination is effectively removed using custom made ecofriendly cellulose modified hydrogel in order to reduce organic load in the test samples. The structure, morphology and the thermal properties of hydrogel are determined by Fourier-transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis respectively. The dye removal mechanism involves pseudo second order kinetics, adsorption is found to be spontaneous based on the thermodynamic parameters and it is befitting to Freundlich isotherm model.

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Section: General Procedures For the Preparation Of Cmc-g-poly (Atac-comentioning

confidence: 99%

Nitrate/Nitrite determination in water and soil samples accompanied by in situ azo dye formation and its removal by superabsorbent cellulose hydrogel

et al. 2020

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“…Entre esses processos, a adsorção com carbono mostra-se muito eficaz na remoção de variados poluentes, no entanto o elevado custo desse método em larga escala levou a pesquisas com materiais adsorventes alternativos (ANASTOPOULOS et al, 2019;DAI et al, 2018;GEREMIAS et al, 2012). de pesquisas foi desenvolvido aproveitando os resíduos lignocelulósicos da bananicultura como biomassa adsorvente para o tratamento de poluentes (AKBAR et al, 2019;BELLO et al, 2018;DAI et al, 2018;JAIN;MALIK;YADAV, 2016;MAHMOOD-UL-HASSAN et al, 2015;NGU-YEN et al, 2013;SINGH et al, 2018).…”

Section: Materiais Adsorventesunclassified

“…Efluentes da indústria têxtil e de impressão contendo grande quantidade de azul de metileno foram tratados com resíduos da bananicultura, sendo estes eficazes na remoção do poluente das águas (HAMEED;MAHMOUD;AHMAD, 2008;RAFATULLAH et al, 2010). No trata-mento de águas contaminadas com metais pesados, como chumbo, níquel, zinco e crômio, os resíduos agrícolas do cultivo de banana apresentaram capacidades iguais ou até maiores de adsorção em comparação com os adsorventes convencionais (ANASTOPOULOS et al, 2019;BELLO et al, 2018;MYLAPILLI;REDDY, 2019;LIU et al, 2019;NGUYEN et al, 2013). Na remoção do carbofurano (um dos pesticidas carbamatos mais tóxicos existentes) de águas contaminadas, a utilização do pseudocaule da bananeira combinado com carvão ativado mostrou-se como uma eficiente opção (AHMAD; DANISH, 2018).…”

Section: Materiais Adsorventesunclassified

Potenciais alternativas para reutilização dos resíduos da bananicultura: uma revisão sistemática

Pereira

Magnago

2020

Rev. Bras. Ciênc. Ambient. (Online)

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A banana é a segunda fruta mais consumida no mundo. Seu cultivoproduz grandes quantidades de resíduos lignocelulósicos, descartadosmajoritariamente de maneira inadequada. Muitas vezes esses resíduos sãopotenciais meios de proliferação de vetores, além de contribuir, mediantedecomposição, para a geração de gases que ocasionam o efeito estufa.Assim, buscou-se identificar, por meio de uma pesquisa sistemática em basesde dados (Periódicos Capes, Science Direct e Springer Link), alternativas paraa reutilização e consequente valorização desses resíduos. Propôs-se realizaruma análise temporal quantitativa e qualitativa dos artigos selecionados,identificando o número de publicações por ano e os periódicos em queforam publicados. Identificou-se crescente número de artigos publicados naúltima década, na maioria em periódicos de alto impacto (índice SCImago).Dessa forma, constatou-se que a produção de compósitos, biocombustíveise compostos adsorventes são as principais alternativas para se atribuirmaior valor agregado aos resíduos da bananicultura e, consequentemente,promover seu reaproveitamento.

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“…Superabsorbent polymers (SAPs), an innovative class of hydrogel products, have been widely studied and used in many fields such as hygiene products, drug delivery systems, agriculture, biomedicine and wastewater treatment, and in other industries where outstanding water absorbing and holding properties are of major importance . In general, SAPs possess moderately crosslinked networks in hydrophilic polymeric chains that are capable of absorbing large quantities of water or other aqueous fluids, and retain their dimensional features without dissolving.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

Choi

Kim

2019

Polymer International

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Superabsorbent polymers (SAPs) have been widely studied and used in various industries. In this study, SAPs based on sodium polyacrylate (NaPAA) and poly(vinyl alcohol) were successfully prepared in the form of nanofibers using the electrospinning technique. The heat‐treated superabsorbent nanofibers (SANs) with 7 wt% of NaPAA and containing both crystal structures and crosslinks presented the best absorption performance, with up to 3.9 times and 134% increase in the absorption area and swelling ratio, respectively. Furthermore, the crystal structure and crosslinking of the SANs enabled them to maintain their fiber network during water absorption and recovery. The absorption rate of SANs having both crystal structures and crosslinks was slightly lower than that of nanofibers with only crystal structures, but it was still higher than that of SAPs because of the highly porous nature of the nanowebs. The easy processing and structural stability of SANs are expected to be useful in a wide range of applications. © 2019 Society of Chemical Industry

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A study on adsorption behavior of newly synthesized banana pseudo-stem derived superabsorbent hydrogels for cationic and anionic dye removal from effluents

Cited by 137 publications

References 38 publications

Nitrate/Nitrite determination in water and soil samples accompanied by in situ azo dye formation and its removal by superabsorbent cellulose hydrogel

Nitrate/Nitrite determination in water and soil samples accompanied by in situ azo dye formation and its removal by superabsorbent cellulose hydrogel

Potenciais alternativas para reutilização dos resíduos da bananicultura: uma revisão sistemática

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

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