Review on preparation and adsorption properties of chitosan and chitosan composites

Liu, Xiaoqi; Zhao, Xinxin; Liu, Yan; Zhang, Ting‐an

doi:10.1007/s00289-021-03626-9

Cited by 80 publications

(32 citation statements)

References 178 publications

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“…They are mainly extracted from marine resources (shrimp shell and algal biomass, respectively). These biopolymers are very versatile both physically (elaborating different shaping and conditionings) and chemically (reactivity of functional groups for chemical reaction and grafting of specific reactive groups) [19][20][21][22][23][24]. Chitosan is characterized by the presence of hydroxyl groups (providing hydrophilic behavior) and amine groups, which are highly reactive for metal binding.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Heavy Metal Ions Using Magnetic Glycine-Modified Chitosan—Application to Aqueous Solutions and Tailing Leachate

et al. 2021

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The necessity of decontaminating effluents for the dual purpose of environmental beneficiation and valorization of low-grade resources is driving the development of new sorbents. The functionalization of biopolymers is a promising strategy for improving sorption performance. Incorporating magnetic micro-particles offers an opportunity for the facilitated recovery of spent micron-size sorbent. Combining magnetic facilities and biopolymer functionalization represents a winning strategy. Magnetic glycine-grafted chitosan (G@MChs) was synthesized for the sorption of Ni(II), Zn(II), and Hg(II) before being applied to the removal of hazardous and strategic metals from tailing leachates. The sorbent was characterized using Fourier transform infrared spectroscopy and scanning electron microscopy, before and after metal sorption. The acid–base properties of functionalized sorbent were also determined (pHPZC). Uptake kinetics were studied in mono- and multi-component solutions using different equations for kinetic modeling at optimized pH (i.e., pH0: 5.5). Langmuir and Sips equations were applied to model sorption isotherms in single-component solutions. In addition, sorption isotherms in multi-component solutions were used to evaluate the preference for selected metals. Maximum sorption capacities were 0.35 mmol Hg g−1, 0.47 mmol Zn g−1, and 0.50 mmol Ni g−1. Acidified urea solution (pH 2.7) successfully desorbs metal ions from G@MChs (desorption > 90%). The sorbent was tested for the recovery of hazardous and strategic metal ions from acidic leachates of tailings. This study demonstrates the promising performance of G@MChs for the treatment of complex metal-bearing solutions.

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Section: Introductionmentioning

confidence: 99%

Recovery of Heavy Metal Ions Using Magnetic Glycine-Modified Chitosan—Application to Aqueous Solutions and Tailing Leachate

et al. 2021

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“…The shell materials are mostly phospholipids or proteins, which are more susceptible to acoustic waves than the hard shells of polymers ( Pote et al, 2021 ). In addition, chitosan is a material of choice for the nanobubble shell because of its low toxicity, low immunogenicity, and excellent biocompatibility ( Liu et al, 2021 ). NBs can be bioconjugated with different forms of drugs or proteins/DNA for selective delivery.…”

Section: Chemical Synthesis Of Nanosized Ultrasound Contrast Agentsmentioning

confidence: 99%

Nanosized Contrast Agents in Ultrasound Molecular Imaging

Zeng

Chen

2021

Front. Bioeng. Biotechnol.

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Applying nanosized ultrasound contrast agents (nUCAs) in molecular imaging has received considerable attention. nUCAs have been instrumental in ultrasound molecular imaging to enhance sensitivity, identification, and quantification. nUCAs can achieve high performance in molecular imaging, which was influenced by synthetic formulations and size. This review presents an overview of nUCAs from different synthetic formulations with a discussion on imaging and detection technology. Then we also review the progress of nUCAs in preclinical application and highlight the recent challenges of nUCAs.

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“…Sorption is a superior technique because of its low cost, easy operation, and good yield [ 6 , 7 ]. The interest in biosorbents obtained from plants or animal waste has been growing in recent years [ 8 , 9 , 10 , 11 , 12 ]. In addition to the advantages mentioned above, such biosorbents often require shorter preparation time, are easily available, biodegradable, and do not disturb the balance of the ecosystem.…”

Section: Introductionmentioning

confidence: 99%

“…Apart from the chemical structure and biological activity, the variety of structural forms enables the use of chitosan in many areas of the economy: water and wastewater treatment, the food industry, the textile industry, the paper industry, the cosmetics industry, pharmacology, and biomedicine [ 12 ]. Various water pollutants, such as metal cations, anions, dyes, and pharmaceuticals, can be captured by the hydroxyl (OH) and amino (NH 2 ) functional groups present in the chitosan structure through chelating effects or electrostatic attraction [ 12 , 13 , 14 ]. Modifying chitosan can make the biopolymer acquire even better properties.…”

Section: Introductionmentioning

confidence: 99%

“…One of the modification methods is the cross-linking of chitosan, e.g., with glutaraldehyde, epichlorohydrin, and diethyl ether, which improves mechanical and chemical resistance. Another very popular method is mixing chitosan with other substances, such as polymers, e.g., poly(vinyl alcohol), poly(acrylic acid), collagen, gelatin, cellulose, polylactide, and poly(ethylene oxide) [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Boron Removal by Sorption on Modified Chitosan Hydrogel Beads

et al. 2021

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An excess concentration of boron in irrigation and drinking water can negatively affect the yield of plants and the human nervous system, respectively. To meet the recommended levels, hybrid biosorbent hydrogel beads based on chitosan and manganese (II-IV) were employed for the removal of boron from aqueous media. The results showed that the biosorbent effectively removed boric acid from the aqueous medium at neutral pH over a sorption time of 2 h and the liquid/hydrogel ratio of 20 mL/g, achieving a maximum sorption capacity near 190 mg/g. The modeling of the sorption equilibrium data indicated that the Freundlich isotherm equation gave the best fit out of the isotherm models examined. A pseudo-second-order model was found to best describe the sorption kinetics. The favorable attachment of manganese to the chitosan structure enabled the sorption of boron and was confirmed by FTIR, RS, XRD, SEM and ICP-OES methods. Boron desorption from the spent biosorbent was successfully achieved in three cycles using a NaOH solution. In general, the results of this research indicate that this method is one of the possibilities for improving water quality and may contribute to reducing pollution of the aquatic environment.

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Review on preparation and adsorption properties of chitosan and chitosan composites

Cited by 80 publications

References 178 publications

Recovery of Heavy Metal Ions Using Magnetic Glycine-Modified Chitosan—Application to Aqueous Solutions and Tailing Leachate

Recovery of Heavy Metal Ions Using Magnetic Glycine-Modified Chitosan—Application to Aqueous Solutions and Tailing Leachate

Nanosized Contrast Agents in Ultrasound Molecular Imaging

Boron Removal by Sorption on Modified Chitosan Hydrogel Beads

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