Chitosan adsorbent reinforced with citric acid modified β-cyclodextrin for highly efficient removal of dyes from reactive dyeing effluents

Zhao, Jiangbin; Zou, Zhengdong; Ren, Ru Shan; Sui, Xiaofeng; Mao, Zhiping; Xu, Hong; Zhong, Yanfei; Zhang, Linping; Wang, Bijia

doi:10.1016/j.eurpolymj.2018.08.044

Cited by 56 publications

(15 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(3) Fixation is also a principal mechanism for dyes removal by the clay materials. CAB has a number of micropores and mesopores, so CR may diffuse and be fixed into the pore spaces of CAB structure (Zhao et al, 2018). Adsorption kinetics fitting results especially intraparticle diffusion model has confirmed that CR adsorption on CAB involves pore-filling by diffusing.…”

Section: Adsorption Mechanism Of Cr On Acbmentioning

confidence: 80%

Citric Acid Modified Bentonite for Congo Red Adsorption

et al. 2019

View full text Add to dashboard Cite

Raw bentonite (RB) was chemically modified by citric acid (CA) to obtain a low-cost and environment-friendly citric acid incorporated bentonite (CAB) adsorbent, which was applied for the adsorptive removal of Congo Red (CR). The effect of adsorbent dosage, contact time, ionic strength, surfactant, and pH on adsorption was investigated. Adsorption equilibrium data fitted well with Langmuir model while the Langmuir adsorption capacity of CR on CAB reached up to 384 mg•g −1. Furthermore, CR adsorption on CAB followed pseudo-second kinetic model while intra-particle diffusion was not the only rate-limiting step as determined from intra-particle diffusion model investigation. RB and CAB were characterized by XRD, FT-IR, and BET techniques. A proposed mechanism for the adsorption of CR over CAB suggested the chemical adsorption phenomenon is mainly controlled by chelation, hydrogen bonding, and fixing.

show abstract

Section: Adsorption Mechanism Of Cr On Acbmentioning

confidence: 80%

Citric Acid Modified Bentonite for Congo Red Adsorption

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Zhao et al measured the removal efficiency of blends of chitosan with poly(β-CD-co-citric acid) for the following set of dyes: C.I. Reactive Blue 49, Reactive Yellow 176, Reactive Blue 14, Reactive Black 5, and Reactive Red 141 [144]. It was found that this blend is highly effective for dye removal, with an RE higher than 90%, besides attaining higher q max values (e.g., for Reactive Blue 49, q max = 498 mg g −1 ).…”

Section: Chitosan-based Sorbentsmentioning

confidence: 99%

Cyclodextrin Polymers and Cyclodextrin-Containing Polysaccharides for Water Remediation

et al. 2021

View full text Add to dashboard Cite

Chemical pollution of water has raised great concerns among citizens, lawmakers, and nearly all manufacturing industries. As the legislation addressing liquid effluents becomes more stringent, water companies are increasingly scrutinized for their environmental performance. In this context, emergent contaminants represent a major challenge, and the remediation of water bodies and wastewater demands alternative sorbent materials. One of the most promising adsorbing materials for micropolluted water environments involves cyclodextrin (CD) polymers and cyclodextrin-containing polysaccharides. Although cyclodextrins are water-soluble and, thus, unusable as adsorbents in aqueous media, they can be feasibly polymerized by using different crosslinkers such as epichlorohydrin, polycarboxylic acids, and glutaraldehyde. Likewise, with those coupling agents or after substituting hydroxyl groups with more reactive moieties, cyclodextrin units can be covalently attached to a pre-existing polysaccharide. In this direction, the functionalization of chitosan, cellulose, carboxymethyl cellulose, and other carbohydrate polymers with CDs is vastly found in the literature. For the system containing CDs to be used for remediation purposes, there are benefits from a synergy that arises from (i) the ability of CD units to interact selectively with a broad spectrum of molecules, forming inclusion complexes and higher-order supramolecular assemblies, (ii) the functional groups of the crosslinker comonomers, (iii) the three-dimensional structure of the crosslinked network, and/or (iv) the intrinsic characteristics of the polysaccharide backbone. In view of the most recent contributions regarding CD-based copolymers and CD-containing polysaccharides, this review discusses their performance as adsorbents in micropolluted water environments, as well as their interaction patterns, addressing the influence of their structural and physicochemical properties and their functionalization.

show abstract

“…However, chitosan, if not modified, can dissolve in acidic solutions because of the protonation of amino acids, hindering the adsorption of dyes [186]. To avoid such a problem, chitosan can be crosslinked with carboxylic acids and, to improve this biosorbent, Zhao et al [187] chemically incorporated cyclodextrins into chitosan by means of esterification using citric acid, obtaining a biosorbent with a high capacity for adsorption of reactive dyes from textile effluents.…”

Section: Cyclodextrin Matrixmentioning

confidence: 99%

The Role of β-Cyclodextrin in the Textile Industry—Review

Bezerra

Arias²,

Firmino

et al. 2020

Molecules

View full text Add to dashboard Cite

β-Cyclodextrin (β-CD) is an oligosaccharide composed of seven units of D-(+)-glucopyranose joined by α-1,4 bonds, which is obtained from starch. Its singular trunk conical shape organization, with a well-defined cavity, provides an adequate environment for several types of molecules to be included. Complexation changes the properties of the guest molecules and can increase their stability and bioavailability, protecting against degradation, and reducing their volatility. Thanks to its versatility, biocompatibility, and biodegradability, β-CD is widespread in many research and industrial applications. In this review, we summarize the role of β-CD and its derivatives in the textile industry. First, we present some general physicochemical characteristics, followed by its application in the areas of dyeing, finishing, and wastewater treatment. The review covers the role of β-CD as an auxiliary agent in dyeing, and as a matrix for dye adsorption until chemical modifications are applied as a finishing agent. Finally, new perspectives about its use in textiles, such as in smart materials for microbial control, are presented.

show abstract

Chitosan adsorbent reinforced with citric acid modified β-cyclodextrin for highly efficient removal of dyes from reactive dyeing effluents

Cited by 56 publications

References 31 publications

Citric Acid Modified Bentonite for Congo Red Adsorption

Citric Acid Modified Bentonite for Congo Red Adsorption

Cyclodextrin Polymers and Cyclodextrin-Containing Polysaccharides for Water Remediation

The Role of β-Cyclodextrin in the Textile Industry—Review

Contact Info

Product

Resources

About