Preparation, characterization of corn stalk xanthates and its feasibility for Cd (II) removal from aqueous solution

Zheng, Liuchun; Meng, Peipei

doi:10.1016/j.jtice.2015.06.017

Cited by 22 publications

(7 citation statements)

References 29 publications

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“…After the addition of NaOH and CS2 to cellulose, new uptake appeared in 1161 cm -1 and 1110 cm -1 (Figure 2c), which showed the typical uptake of cellulose xanthate (-O -C (= S) -S). Additionally, the wide and high bending vibration absorption of CH2 (1429 cm -1 ) confirmed that a substitution reaction had occurred mainly in the C-6 hydroxyl cellulose group (Zheng & Meng, 2016). FTIR spectra of beads (Figure 2d and 2e) showed a new absorption at 819 cm -1 for ACX-0 beads and 815 cm -1 or ACX-3, which was assumed to be an absorption of Zn-O bonds.…”

Section: Cellulose Contentmentioning

confidence: 76%

“…The FTIR of microfiber cellulose ( Figure 2b) showed a reduction in absorption intensity at wave numbers 3471, 2929, and 1641 cm -1 , which showed that the absorption of lignin compounds in the sample was reduced. On the other hand, the absorption at wave number 1045 cm -1 was shown to increase, demonstrating the absorption of C-O-C cellulose groups (Zheng and Meng, 2016). After the addition of NaOH and CS2 to cellulose, new uptake appeared in 1161 cm -1 and 1110 cm -1 (Figure 2c), which showed the typical uptake of cellulose xanthate (-O -C (= S) -S).…”

Section: Cellulose Contentmentioning

confidence: 94%

“…Based on FTIR spectra of cellulose extracted from corn stalks (Figure 2a) there were absorptions observed at 3471 cm -1 (OH stretching group), 2929 cm -1 (CH group), 1479 cm -1 (CH2) 1384 (antisymmetric CO), 1045 cm -1 (COC groups), 870 cm -1 (β-glycoside bonds), 664 cm -1 (stretching CC), and 1641 cm -1 (C=O group) (Zheng and Meng, 2016). The FTIR of microfiber cellulose ( Figure 2b) showed a reduction in absorption intensity at wave numbers 3471, 2929, and 1641 cm -1 , which showed that the absorption of lignin compounds in the sample was reduced.…”

Section: Cellulose Contentmentioning

confidence: 99%

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Synthesis And Characterization Of Alginate-Cellulose Xanthate Beads From Corn Stalk With NaCL As Porogen

et al. 2021

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In this study, the synthesis of porous beads from corn stalks was carried out. The cellulose extracted from corn stalks was converted into cellulose xanthate and combined with alginate to form porous alginate-cellulose xanthate beads by the ionic gelation method. This study attempted to use sodium chloride (NaCl) as a porogen and zinc acetate as a crosslinker. Beads were characterized to determine the porosity, swelling properties, and functional groups using Fourier Transform Infra-Red (FTIR). The geometry of beads was analyzed by optical microscopy, and its surface morphology was analyzed by Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX). The results showed that corn stalks as agricultural waste material could be used to synthesize porous beads material. The swelling and porosity of beads increased with increasing concentration of NaCl. The presence of porogen has increased beads formation. The results demonstrate the crosslinks between zinc acetate and alginate were successfully characterized using FTIR. NaCl concentration of 9.5% resulted in the highest swelling properties (52.80%) and porosity (81.4%) of the beads.

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Section: Cellulose Contentmentioning

confidence: 76%

Section: Cellulose Contentmentioning

confidence: 94%

Section: Cellulose Contentmentioning

confidence: 99%

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Synthesis And Characterization Of Alginate-Cellulose Xanthate Beads From Corn Stalk With NaCL As Porogen

et al. 2021

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“…Com relação ao xantato de celulose de sisal modificado com álcool láurico, observa-se um evento endotérmico entre 225 e 250°C que pode está relacionado ao processo de dissociação do agente modificante, álcool láurico [17]. Observa-se ainda que nas curvas de DSC que tanto a celulose de sisal pura quanto o xantato de celulose de sisal modificado com álcool láurico apresentam declive endotérmico a partir da temperatura de 350°C que pode está relacionado à degradação de ambas as amostras [17][18][19][20]. Caracterização da morfologia da celulose de sisal bruta e modificada a partir de xantato de celulose por microscopia ótica A Figura 10 (a-d) mostra imagens de microscopia ótica obtidas por meio do equipamento USB Digital Microscope 20x-800x, com ampliação de 20x e 400x, da celulose de sisal bruta e do xantato de celulose de sisal modificado.…”

Section: Caracterização Térmica Da Celulose De Sisal Modificada a Parunclassified

Obtenção de substância surfactante a partir da modificação de celulose

2016

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A atenção mundial aos problemas ambientais tem motivado, nas últimas décadas, estudos sobre a produção de substâncias oriundas da biomassa, por esta ser uma matéria-prima de fonte renovável e seus derivados apresentarem baixo impacto ambiental. Dentre as substâncias extraídas da biomassa, a celulose tem tido destaque e emprego potencial em diversas aplicações, pois a sua estrutura pode ser modificada originando produtos com diferentes propriedades de uso industrial. Este estudo teve por objetivo desenvolver uma rota tecnológica para a obtenção de substância surfactante de sisal (Agave sisalana) modificado com álcool láurico, a partir de xantato celulósico. O produto obtido foi caracterizado quimicamente por espectroscopia na região do infravermelho com transformada de Fourier (FT-IR) quanto à inserção do modificante na macromolécula celulósica e os resultados da referida análise mostraram que o processo de modificação empregado foi efetivo. Análises de verificação da capacidade de dissolução e do grau de saponificação do novo produto, em meio aquoso, mostraram que o processo realizado conferiu boa dispersão e baixo grau de saponificação. O caráter anfifílico da celulose modificada, associado ao baixo grau de saponificação, lhes conferiu atributos para uso em processos industriais.Palavras chave: Celulose; modificação; surfactante.The world's attention to environmental problems has motivated, in recent decades, studies on production of substances derived from biomass, since it is a renewable source and its derivatives present low environmental impact. Among the substances extracted from biomass, the pulp it has had highlighted, and use in various applications, because its structure can be modified giving products with different properties for industrial use. This study aimed to develop a technological route to getting sisal surfactant substance (Agave sisalana) modified with lauryl alcohol from cellulose xanthate. The product obtained was chemically characterized by spectroscopy in the infrared Fourier transform (FT-IR) for the insertion of the modifier in the cellulosic macromolecules and the results of this analysis show that the process of modification employed was effective. Analysis testing of the capacity dissolution and the degree of saponification of the new product in an aqueous medium, the process performed showed that gave good dispersion and low degree of saponification. The amphiphilic character of the modified cellulose, together with the low degree of saponification gave them attributes for use in industrial processes.

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“…Bioadsorption is considered a viable Cr (VI) and Hg (II) removal technique, because it removes large percentages of agroindustrial residual origin adsorbents that do not require care or maintenance, are not expensive, easy to process and highly available [25, 26, 27, 28, 29,]. Among the materials widely studied and with excellent results for the removal of heavy metals, are: corn huskTejada-Tovar et al, [30]; Zheng and Meng, [31], pine sawdust [32], bagasse of palm and yam [33], cassava and lemon peel [34], cane bagasse [35], walnut shell [36], coffee leaf [37], orange and cocoa shells [38,39], Mangifera sawdust [40],tea residue [41], Cayota urens waste [42], tusa corn stalks [43], , plantain peel [24], among others.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics, Kinetics and Equilibrium Adsorption of CR (VI) and HG (II) in Aqueous Solution on Corn Husk (Zea Mays)

2018

IJCTR

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The use of agroindustrial waste as low-cost adsorbents in water treatment is an option over conventional technologies. In the present investigation, a thermodynamic, kinetic and equilibrium study of the adsorption of chromium (VI) and mercury (II) ions from corn husk biomass (Zea mays) was carried out, determining the functional groups in the biomass surface by means of FTIR analysis. Hydroxyl, carboxylic and aliphatic groups were found to be the major contributors to the metal removal process. Batch adsorption tests were carried out, varying the pH, temperature and particle size. pH was established to be the most influential factor; the highest adsorption capacity was given at pH=2 for chromium and pH=6 for mercury, at a temperature of 25°C and particle size of 0.355mm. A maximum adsorption capacity of Cr (VI) was reached of 17.30 mg/g (86%) and 18.85 mg/g (94.3%) for Hg (II). The kinetic model that best fitted the experimental data was Elovich and the isotherm that best described the process was Freundlich. The thermodynamic parameters(∆H 0 , ∆G 0 , ∆S 0)suggest that the removal process is favourable, spontaneous, reversible and endothermic. The results show that corn husk is a good alternative as an adsorber of chromium and mercury.

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Preparation, characterization of corn stalk xanthates and its feasibility for Cd (II) removal from aqueous solution

Cited by 22 publications

References 29 publications

Synthesis And Characterization Of Alginate-Cellulose Xanthate Beads From Corn Stalk With NaCL As Porogen

Synthesis And Characterization Of Alginate-Cellulose Xanthate Beads From Corn Stalk With NaCL As Porogen

Obtenção de substância surfactante a partir da modificação de celulose

Thermodynamics, Kinetics and Equilibrium Adsorption of CR (VI) and HG (II) in Aqueous Solution on Corn Husk (Zea Mays)

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