Cyclodextrin modified filter paper for removal of cationic dyes/Cu ions from aqueous solutions

Li, Yaoyue; Zhou, Yanbo; Zhou, Yi; Lei, Juying; Pu, Shengyan

doi:10.2166/wst.2019.009

Cited by 56 publications

(25 citation statements)

References 23 publications

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“…The advantage of adsorption is that gold can be recovered in small quantities from either primary or secondary solutions. Adsorption is easy to apply and if the adsorbent material is well chosen, it can have efficiencies that should not be neglected [ 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Estimation on Fixed-Bed Column Parameters of Breakthrough Behaviors for Gold Recovery by Adsorption onto Modified/Functionalized Amberlite XAD7

Negrea

Mihăilescu

Moșoarcă

et al. 2020

IJERPH

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The objective of this paper was to evaluate the potential of a new adsorbent material to recover Au (III) from real wastewater, in a column with a fixed bed in a dynamic regime. The material was obtained through functionalization, by impregnation of the commercial resin, Amberlite XAD 7 type, with L-glutamic acid, which has active groups –NH2 and –COOH. The goal of the experiments was to follow the correlation of fixed-bed column specific adsorption parameters (the effluent volume, the amounts of adsorbent, heights of the adsorbent layer in column) with the time necessary to cross the column. The experimental data obtained were modeled, using the Bohart–Adams, Yoon–Nelson Thomas and Clark models, to establish the mechanism of the Au (III) recovery process, in a dynamic regime. Also, we established the number of cycles for adsorption–desorption for which the new material can be used. We used 5% HNO3 (5%) as desorption agent in five adsorption–desorption cycles, until the process was no longer efficient. The degree of desorption varied between 84% and 34% from cycle 1 to cycle 5.

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Section: Introductionmentioning

confidence: 99%

Estimation on Fixed-Bed Column Parameters of Breakthrough Behaviors for Gold Recovery by Adsorption onto Modified/Functionalized Amberlite XAD7

Negrea

Mihăilescu

Moșoarcă

et al. 2020

IJERPH

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“…However, MB and RR are a carcinogenic, non-degradable materials and causes serious environmental problems against aquatic animals, plants and human beings [4]. The existence of dyes in aqueous environments undesirably affects their esthetic nature [5][6][7][8][9][10]. Some side effects have been reported for MB and RR at high dosage such as eye burns, chest pain, fast breathing, confusion and profuse sweating [11].…”

Section: Introductionmentioning

confidence: 99%

Improvement of dyes removal from aqueous solution by Nanosized cobalt ferrite treated with humic acid during coprecipitation

2019

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Highly effective novel adsorbent [CoFe 2 O 4-humic acid(HA)] was synthesized by co-precipitation technique at pH 6 (H6) and pH 8 (H8). XRD, S BET and Zeta-potential measurements were used to study the physicochemical properties of the prepared nanoparticles. XRD results showed that the chemical treatment of CoFe 2 O 4 by HA causes the appearance of carbon as new active sites for adsorption process. Batch adsorption tests were achieved to eliminate anionic remazole-red (RR-133) and cationic methylene blue (MB) dyes. The obtained data showed that H6 and H8 solids calcined at 300 and 500 °C have higher adsorption rate for removing of dye than unmodified cobalt iron mixed oxide. The removal reached 100% after a period of dye contact time 2 min and 30 min for RR and MB, respectively. The uptake of RR and MB was much affected by the pH of dye solution. The pseudo-second-order kinetic model was the most fitted well and the adsorption process followed the Langmuir isotherm model. The adsorption of dye on adsorbent was chemisorption process. The as-prepared adsorbents can be regenerated and reused four times for both dyes. The efficiency of the prepared nano-samples and durability as adsorbent were accomplished.

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“…The functionalized filter paper showed a significant adsorption capacity for Cu(II) (39.1 mg g −1 ) when compared to unmodified filter paper (0.62 mg g −1 ). As was previously discussed, citric acid, and not the CD cavity, had the main role in the sorption process [124].…”

Section: Metal Ionsmentioning

confidence: 73%

“…Cellulose-CD materials have also been studied for the absorption of metal ions. Li et al [124] modified filter paper with β-CD, using citric acid as a crosslinker. This way, the hydroxyl groups of cellulose and those of β-CD underwent simultaneous esterification with the polyacid.…”

Section: Metal Ionsmentioning

confidence: 99%

Cyclodextrin Polymers and Cyclodextrin-Containing Polysaccharides for Water Remediation

et al. 2021

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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.

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Cyclodextrin modified filter paper for removal of cationic dyes/Cu ions from aqueous solutions

Cited by 56 publications

References 23 publications

Estimation on Fixed-Bed Column Parameters of Breakthrough Behaviors for Gold Recovery by Adsorption onto Modified/Functionalized Amberlite XAD7

Estimation on Fixed-Bed Column Parameters of Breakthrough Behaviors for Gold Recovery by Adsorption onto Modified/Functionalized Amberlite XAD7

Improvement of dyes removal from aqueous solution by Nanosized cobalt ferrite treated with humic acid during coprecipitation

Cyclodextrin Polymers and Cyclodextrin-Containing Polysaccharides for Water Remediation

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