A review on modification methods to cellulose-based adsorbents to improve adsorption capacity

Hokkanen, Sanna; Bhatnagar, Amit; Sillanpää, Mika

doi:10.1016/j.watres.2016.01.008

Cited by 857 publications

(322 citation statements)

References 111 publications

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“…Monomer-grafting enables attaching many different functional groups to the backbone of cellulose. Another method of attaching new specific groups to the cellulose is direct modification in which new groups are bonded to hydroxyl groups through chemistries such as base solutions, mineral and organic acid solutions, organic compounds or oxidizing agents [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

2018

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“…In general, chemical composition modification, especially those in which bioactive molecules are introduced, might add new biological functions to any material, which becomes a biomaterial. Some strategies have been applied to achieve new derivatives of cellulose (bacterial or vegetal), including composites formation and attaching material by covalent bond [14][15][16][17][18][19][20][21][22]13]. The latter represents an elegant methodology due to the finesse of the modification at molecular level forming a better know structure material.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of fibroblast growing on the mannosylated surface of cellulose membranes

Birkheur

Faria-Tischer

Tischer

et al. 2017

Materials Science and Engineering: C

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“…The percent fluoride adsorption was found to vary with initial solution pH. Because OH − and F − are isoelectronic species but OH − is more active than F − , OH − can compete with F − during the adsorption process . As a result, most of the adsorbent material for F − needs to be used under acidic conditions, which is not a suitable pH for drinking water.…”

Section: Resultsmentioning

confidence: 99%

Next‐generation organometallic adsorbents for safe removal of excessive fluoride from aqueous systems

Khan

Sharma

2018

J of Applied Polymer Sci

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The presence of excessive fluoride contamination in aquatic environments causes large‐scale health problems affecting about 260 million people across the globe. Here we have investigated a novel method to develop zirconium‐based organometallic nanoadsorbents (ZrAN) for the removal of fluoride from aqueous systems. A series of ZrAN adsorbents composed of zirconyl methacrylate (ZrDMA) and acrylonitrile (AN) have been developed by varying the relative amounts of crosslinker, porogen, and comonomers. The spherical adsorbents have high porosity and excellent mechanical stability, properties that prevent material breakage and mass loss during practical use. Experimental factors such as effects of pH, initial fluoride concentration, adsorbent dose, coexisting anions, pHpzc, isotherm models, and surface chemistry were investigated to clarify the adsorption properties of ZrAN. A high adsorption capacity of 46 mg/g was recorded with a high fluoride concentration of 60 mg/L, which outperformed many other reported adsorbents. Moreover, the ZrAN adsorbent performed well over a considerable pH range of 2–10 with significant removal at pH 6–8, which is the preferred range for groundwater applications. Additionally, the results of the toxicity characteristics leaching procedure suggested the ZrAN adsorbents were inert, do not leach out any contaminants (Zr, F−), and deliver safe and potable treated water. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46993.

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A review on modification methods to cellulose-based adsorbents to improve adsorption capacity

Cited by 857 publications

References 111 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

Enhancement of fibroblast growing on the mannosylated surface of cellulose membranes

Next‐generation organometallic adsorbents for safe removal of excessive fluoride from aqueous systems

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