Polyethylenimine-functionalized cellulose aerogel beads for efficient dynamic removal of chromium(<scp>vi</scp>) from aqueous solution

Guo, Dongmei; An, Qingda; Xiao, Zuoyi; Zhai, Shangru; Shi, Zhan

doi:10.1039/c7ra09940a

Cited by 101 publications

(63 citation statements)

References 53 publications

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“…Further application fields embrace environmental remediation and catalysis, both of them have been comprehensively reviewed very recently [210,211]. Functionalized nanofibrillar network of polysaccharide aerogel beads have been utilized as promising reusable filter materials for the applications in environment control system [172,230,231]. High specific surface area of nano-network and chelating functional groups of polysaccharide aerogels offer hosting property and they can be utilized for catalysis applications [65,66,67,68].…”

Section: Applications Of Polysaccharide Aerogel Particlesmentioning

confidence: 99%

Review on the Production of Polysaccharide Aerogel Particles

et al. 2018

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A detailed study of the production of polysaccharide aerogel (bio-aerogel) particles from lab to pilot scale is surveyed in this article. An introduction to various droplets techniques available in the market is given and compared with the lab scale production of droplets using pipettes and syringes. An overview of the mechanisms of gelation of polysaccharide solutions together with non-solvent induced phase separation option is then discussed in the view of making wet particles. The main steps of particle recovery and solvent exchange are briefly described in order to pass through the final drying process. Various drying processes are overviewed and the importance of supercritical drying is highlighted. In addition, we present the characterization techniques to analyse the morphology and properties of the aerogels. The case studies of bio-aerogel (agar, alginate, cellulose, chitin, κ-carrageenan, pectin and starch) particles are reviewed. Potential applications of polysaccharide aerogel particles are briefly given. Finally, the conclusions summarize the prospects of the potential scale-up methods for producing bio-aerogel particles.

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Section: Applications Of Polysaccharide Aerogel Particlesmentioning

confidence: 99%

Review on the Production of Polysaccharide Aerogel Particles

et al. 2018

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“…(2015)13Treated waste news paper360 min.3 g dm −3 20 mg dm −3 318 K59.88 mg g -1 Dehghani et al. (2016)14Polyethylenimine-functionalized cellulose aerogel beads2180 min.0.02 g dm −3 100 mg dm −3 298 K229.1 mg g -1 Guo et al. (2017)15Nanosized cellulose fibers from rice husk6100 min.1.5 g dm −3 30 mg dm −3 303 K3.76 mg g -1 Pourfadakari et al.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound assisted batch operation for the adsorption of hexavalent chromium onto engineered nanobiocomposite

Sarkar

2019

Heliyon

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The study demonstrates the comparative retention characteristics of chromium from aqueous environment on iron(III) cellulose nanocomposite bead under conventional (C-ads) and ultrasound assisted (U-ads) batch adsorption operation. Optimization of process parameters was achieved varying pH, contact/sonication time, initial Cr(VI) concentration, adsorbent dose at fixed solution temperature. Equilibrium was achieved within 5 h and 30 min of contact time in C-ads and U-ads respectively. Langmuir isotherm is found suitable in C-ads while Temkin in U-ads. Both the operation is aided by change in negative free energy, positive enthalpy and entropy. Ultrasound assisted adsorption is much favorable in terms of efficiency, feasibility, spontaneity and randomness. Both the operations follow more the second order than the first order kinetic model. The pore diffusion prevails more in case of U-ads while the surface adsorption in C-ads.

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“…Heavy metal pollution has led to severe environmental problems around the world as some industries produce contaminated wastewaters and pollute sewage systems that result, for example, in the spread of water-related diseases [207]. Reusable polyethylenimine (PEI) grafted porous cellulose was able to remove hexavalent chromium from aqueous solutions with an initial capacity of 229.10 mg/g [212]. CNF was combined with PEI via electrostatic interactions to produce aerogel for heavy metal removal from water with the maximum adsorption capacity of 175.44 mg/g Cu(II) and 357.44 mg/g Pb(II), and it was shown to be easily regenerated by ethylenediaminetetraacetic acid (EDTA) [213].…”

Section: Functionalization As a Tool To Enhance The Properties Of Ligmentioning

confidence: 99%

Biorefinery Approach for Aerogels

et al. 2020

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According to the International Energy Agency, biorefinery is “the sustainable processing of biomass into a spectrum of marketable bio-based products (chemicals, materials) and bioenergy (fuels, power, heat)”. In this review, we survey how the biorefinery approach can be applied to highly porous and nanostructured materials, namely aerogels. Historically, aerogels were first developed using inorganic matter. Subsequently, synthetic polymers were also employed. At the beginning of the 21st century, new aerogels were created based on biomass. Which sources of biomass can be used to make aerogels and how? This review answers these questions, paying special attention to bio-aerogels’ environmental and biomedical applications. The article is a result of fruitful exchanges in the frame of the European project COST Action “CA 18125 AERoGELS: Advanced Engineering and Research of aeroGels for Environment and Life Sciences”.

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Polyethylenimine-functionalized cellulose aerogel beads for efficient dynamic removal of chromium(vi) from aqueous solution

Abstract: Cellulose aerogel beads with high a density of reactive amino groups were facilely prepared via a cross-linking reaction for efficient dynamic removal of Cr(vi) from aqueous solutions.

Cited by 101 publications

References 53 publications

Review on the Production of Polysaccharide Aerogel Particles

Review on the Production of Polysaccharide Aerogel Particles

Ultrasound assisted batch operation for the adsorption of hexavalent chromium onto engineered nanobiocomposite

Biorefinery Approach for Aerogels

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