Current State and New Trends in the Use of Cellulose Nanomaterials for Wastewater Treatment

Abou-Zeid, Ragab E.; Khiari, Ramzi; El-Wakil, Nahla A.; Dufresne, Alain

doi:10.1021/acs.biomac.8b00839

Cited by 242 publications

(118 citation statements)

References 125 publications

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“…NC-based materials as efficient adsorbent and flexible membrane have been recently reviewed by Abouzeid et al revealing that such materials with outstanding features such as high surface area, better mechanical characteristics, hydrophilicity, and tailorability of the surface chemistry through grafting anionic and cationic surface chemical groups match with the prerequisites for wastewater treatment materials (Abouzeid et al, 2018). More recently, a comprehensive review article has been published by Köse et al, dealing with NC-based adsorbents, revealed the importance of such new materials as viable sustainable alternatives as adsorbents (Köse et al, 2020).…”

Section: Nanocellulose For Adsorption Separation Decomtamination Amentioning

confidence: 99%

Nanocellulose: From Fundamentals to Advanced Applications

et al. 2020

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Over the past few years, nanocellulose (NC), cellulose in the form of nanostructures, has been proved to be one of the most prominent green materials of modern times. NC materials have gained growing interests owing to their attractive and excellent characteristics such as abundance, high aspect ratio, better mechanical properties, renewability, and biocompatibility. The abundant hydroxyl functional groups allow a wide range of functionalizations via chemical reactions, leading to developing various materials with tunable features. In this review, recent advances in the preparation, modification, and emerging application of nanocellulose, especially cellulose nanocrystals (CNCs), are described and discussed based on the analysis of the latest investigations (particularly for the reports of the past 3 years). We start with a concise background of cellulose, its structural organization as well as the nomenclature of cellulose nanomaterials for beginners in this field. Then, different experimental procedures for the production of nanocelluloses, their properties, and functionalization approaches were elaborated. Furthermore, a number of recent and emerging uses of nanocellulose in nanocomposites, Pickering emulsifiers, wood adhesives, wastewater treatment, as well as in new evolving biomedical applications are presented. Finally, the challenges and opportunities of NC-based emerging materials are discussed.

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Section: Nanocellulose For Adsorption Separation Decomtamination Amentioning

confidence: 99%

Nanocellulose: From Fundamentals to Advanced Applications

et al. 2020

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“…[ 48 ] More information on waste water treatment with cellulose nanomaterials is available in recent reviews. [ 49,50 ]…”

Section: Regeneration Of Cellulose In Different Physical Formsmentioning

confidence: 99%

Cellulose Regeneration and Chemical Recycling: Closing the “Cellulose Gap” Using Environmentally Benign Solvents

Seoud

Kostag

Jedvert

et al. 2020

Macro Materials & Eng

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matched by synthetic fibers. Therefore, the demand on natural and fabricated cellulosic fibers is expected to continue and rise. The production of cotton, however, is not expected to meet this demand because of restrictions on farmland use and availability of irrigation water. [3] Anticipating the so-called "the cellulosic fiber gap," [1] the textile industry currently leads several initiatives for developing fibers that can complement cotton. [3] Consequently, there is incitement and opportunities for an increase in use of cellulose from other sources, in particular wood, and increased interest in physical (i.e., mechanical) and chemical recycling (CR) of biopolymers. [4] Production of fibers and other artifacts from cellulose extracted from wood involves chemical or physical dissolution of the biopolymer, followed by its regeneration in the desired physical form in an appropriate bath. The most important example of cellulose chemical dissolution (i.e., via covalent bond formation) is the viscose rayon fiber, produced by regeneration of cellulose from its xanthate in acid bath. The Lyocell fiber process involves, however, physical dissolution of cellulose in N-methylmorpholine-N-oxide (NMMO) hydrate, followed by regeneration in an aqueous bath. [5] Cellulose regeneration is not restricted to formation of fibers. The biopolymer and its derivatives, in particular esters, can be "shaped" into other physical forms including spheres of different diameters (down to the nanoscale), films produced by casting and spin coating, and nonwoven mats produced by electrospinning or solution blowing. This review covers some recent advances of the regeneration of cellulose from alkali solutions and ionic solvents, in particular those based on imidazole, quaternary ammonium electrolytes (QAEs), and salts of heterocyclic super-bases. We refer to these ionic solvents collectively as ionic liquids (ILs). Representative examples of the ILs employed for cellulose dissolution are shown in Figure 1. These solvents dissolve cellulose samples of a wide range of degrees of polymerization (DPs) and indices of crystallinity (Ics). For practical reasons, binary mixtures of ILs with molecular solvents (MSs) are used alongside pure ILs. This use is advantageous because of the concomitant decrease in solution viscosity; there are many examples where the binary solvent mixture dissolves more cellulose than the parent pure IL. [5] Strategies to mitigate the expected "cellulose gap" include increased use of wood cellulose, fabric reuse, and recycling. Ionic liquids (ILs) are employed for cellulose physical dissolution and shaping in different forms. This review focuses on the regeneration of dissolved cellulose as nanoparticles, membranes, nonwoven materials, and fibers. The solvents employed in these applications include ILs and alkali solutions without and with additives. Cellulose fibers obtained via the carbonate and carbamate processes are included. Chemical recycling (CR) of polycotton (cellulose plus poly(ethylene terephthalate)) is addressed...

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“…161 In addition, nanocellulose is thermodynamically stable as compared to metallic nanoparticles, which make them a suitable material for this application. [162][163][164] The processing of nanocellulose-based membranes for optimal access to functional sites, with high ux and mechanical stability, is a challenging task in water purication. In generals, lling of electrospun mats with nanocellulose; vacuum ltration and coating; and freeze-drying are the most relevant and used techniques for the processing of nanocellulose-based membranes.…”

Section: Water Puricationmentioning

confidence: 99%

“…Cellulose is the most abundant polymer in nature 1 and consists of polysaccharides with long chains of b-D-glucopyranose units assembled by b-1,4 glycosidic bonds, which form a dimer known as cellobiose. 2 It is an important constituent of plant cell walls, where it provides mechanical support; it is also present in other organisms such as bacteria, fungi, algae, and even sea Dinesh K. Patel has obtained his PhD degree from the Indian Institute of Technology (BHU)-Varanasi, India in 2016. Currently, He is working as a postdoctoral fellow at Kangwon National University, Chuncheon, Republic of Korea.…”

Section: Introductionmentioning

confidence: 99%