Preparation of carboxylate-functionalized cellulose via solvent-free mechanochemistry and its characterization as a biosorbent for removal of Pb2+ from aqueous solution

Zhang, Wei; Li, Cuiying; Liang, Mei; Geng, Yamin; Lu, Canhui

doi:10.1016/j.jhazmat.2010.05.036

Cited by 48 publications

(24 citation statements)

References 25 publications

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“…Moving further, the absorption band at 2894 cm −1 was connected to the C-H stretching vibrations coming from the cellulose fibres. These two peaks have been observed in many other works [34,35]. Each of the performed modifications contributed to the decrease in the intensity of those absorption bands, compared to the initial cellulosic samples, and, thus, also to the lower concentration of the O-H and C-H moieties in these two samples.…”

Section: Ftir Analysissupporting

confidence: 65%

“…The stretching vibration at 1719 cm −1 was assigned to the C=O bond [35], and the peak in the range of 1640-1618 cm −1 corresponds to the aldehydic and carboxyl stretching vibrations [26] or even to the adsorbed water, which was also identified in a few other studies [36]. According to Fig.…”

Section: Ftir Analysismentioning

confidence: 85%

“…The second decomposition event occurred at various temperatures with the initial point originated from 150 to 250 °C, depending on the type of modified material. This stage was assigned to the thermal degradation of the cellulose fibres [35]. As shown in Fig.…”

Section: Tga Analysismentioning

confidence: 99%

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Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

2018

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This article considers the modification of cellulose fibres with the use of vinyltrimethoxysilane and maleic anhydride as substances to improve the wettability of the additive in the hydrophobic polymer matrix. The stress is put on the possible ways of modification impact investigation and its description. Effects of the treatment are analysed using Fourier transform infrared spectroscopy, which reveal the presence of new moieties on the cellulose surface, e.g. C=C bonds, C=O and Si-C groups, while dynamic light scattering investigation revealed an increase in the hydrodynamic radii of the molecules which was maximized in the case of modification with the use of maleic anhydride. Furthermore, thermal properties were defined with differential scanning calorimetry and thermogravimetric analysis. Some variations within the process of samples thermal degradation are observed-thermal stability of the specimen modified with maleic anhydride is the highest. The presented approach of combined fibre modification analysis techniques, being a scientific novelty, allows to confirm the treatment impact on cellulose properties at many levels. Graphical abstractKeywords Cellulose · Maleic anhydride · Vinyltrimethoxysilane

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Section: Ftir Analysissupporting

confidence: 65%

Section: Ftir Analysismentioning

confidence: 85%

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Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

2018

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“…Chemically modified matrices based on this biopolymer have widely been used as substrates for reagent immobilization and have resulted in numerous applications such as ion exchangers (Anirudhan and Jalajamony 2010), supports for immobilization of microorganisms (Chen et al 2010), effective biosorbents for heavy metals (O'Connell et al 2008;Zhang et al 2010;Takagai et al 2011), removal of organic pollutants (Alila and Boufi 2009) and adsorption of cationic surfactants (Alila et al 2005).…”

Section: Introductionmentioning

confidence: 99%

“…However, enhancement of the reactivity of the cellulose surface can be obtained by introducing chemical modifiers onto its surface. Methods of direct or post functionalization of the cellulose backbone are widely used to convert the biopolymer into compounds useful for several application, especially in adsorption processes (Zhang et al 2010;Klemm et al 2005;Kamel et al 2006;Heinze and Liebert 2001;Gurgel et al 2008). Prior to the functionalization of the biopolymer with many organic or inorganic functional groups, a surface treatment with metal oxides is usually required (Gushikem and Toledo 1999), in order to increase the reactivity of the cellulose surface.…”

Section: Introductionmentioning

confidence: 99%

New promising composite materials useful in the adsorption of Cu(II) in ethanol based on cellulose and cellulose acetate

et al. 2012

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This work describes for the first time the synthesis and characterization of new promising materials based on cellulose (Cel) and cellulose acetate (Celac), previously modified with aluminum oxide (CelAl and CelacAl) and post functionalized with 1,4-diazabicyclo [2.2.2] octane-n-propyltrimethoxysilane chloride (SiDbCl 2 ), resulting the chemically modified hybrid materials CelAl/SiDbCl 2 and CelacAl/SiDbCl 2 . The materials have shown to be useful in the adsorption of CuCl 2 from ethanol, presenting high effective adsorption capacity. In the adsorption process, the copper ions diffuse into the solid solution interface and are retained as anionic complexes CuCl 3 -or CuCl 4 2-. An expressive effective adsorption capacity t Q , as well as the stability constants b 1 and b 2 , were found for both adsorbents: (a) CelAl/DbCl 2 : t Q = 0.33 9 10 -3 mol g -1 , log b 1 = 4.23 (±0.04) and log b 2 = 6.99 (±0.03);(b) CelacAl/DbCl 2 : t Q = 0.48 9 10 -3 mol g -1 , log b 1 = 5.1 (±0.1) and log b 2 = 8.3 (±0.1). Both adsorbent materials are potentially useful in the pre-concentration and further analysis of Cu(II) present in trace amounts in ethanol, extensively used as an automotive fuel in Brazil. Regeneration of the adsorbents requires a very simple procedure consisting in their immersion in aqueous solution which causes the immediate release of the Cu(OH 2 ) n 2? species to the solution phase.

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Modifications of Lignocellulose Fibers and its Application in Adsorption of Heavy Metals from Aqueous Solution

Neto

Barros

Melo

et al. 2015

Surface Modification of Biopolymers

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Preparation of carboxylate-functionalized cellulose via solvent-free mechanochemistry and its characterization as a biosorbent for removal of Pb2+ from aqueous solution

Cited by 48 publications

References 25 publications

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

Universal approach of cellulose fibres chemical modification result analysis via commonly used techniques

New promising composite materials useful in the adsorption of Cu(II) in ethanol based on cellulose and cellulose acetate

Modifications of Lignocellulose Fibers and its Application in Adsorption of Heavy Metals from Aqueous Solution

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