Magnetic thiolated/quaternized-chitosan composites design and application for various heavy metal ions removal, including cation and anion

Song, Xiaoli; Li, Ling; Zhou, Lei; Chen, Pei

doi:10.1016/j.cherd.2018.06.025

Cited by 49 publications

(23 citation statements)

References 62 publications

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“… Removal efficiencies of nanoparticles prepared with chitosan–Fe 3 O 4 (CS-Fe 3 O 4 ), N -(2-hydroxyl)propyl-3-trimethylammonium chitosan chloride–Fe 3 O 4 (HTCC-Fe 3 O 4 ), and N -(2-hydroxyl)propyl-3-trimethylammonium chitosan chloride–cysteine–Fe 3 O 4 (Cyshtcc-Fe 3 O 4 ). Reprinted with permission from ref ( 32 ). Copyright 2018 Elsevier.…”

Section: Properties Of Thiolated Chitosansmentioning

confidence: 99%

Thiolated Chitosans: A Multi-talented Class of Polymers for Various Applications

2020

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Various properties of chitosan can be customized by thiolation for very specific needs in a wide range of application areas. Since the discovery of thiolated chitosans, many studies have proven their advantageous characteristics, such as adhesion to biological surfaces, adjustable cross-linking and swelling behavior, controllable drug release, permeation as well as cellular uptake enhancement, inhibition of efflux pumps and enzymes, complexation of metal ions, antioxidative properties, and radical scavenging activity. Simultaneously, these polymers remain biodegradable without increased toxicity. Within this Review, an overview about the different possibilities to covalently attach sulfhydryl ligands to the polymeric backbone of chitosan is given, and the resulting versatile physiochemical properties are discussed in detail. Furthermore, the broad spectrum of applications for thiolated chitosans in science and industry, ranging from their most advanced use in pharmaceutical and medical science over wastewater treatment to the impregnation of textiles, is addressed.

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Section: Properties Of Thiolated Chitosansmentioning

confidence: 99%

Thiolated Chitosans: A Multi-talented Class of Polymers for Various Applications

2020

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“…Substituting equation (11) into equation (13) can obtain the collision rate of particles under the synergistic effects of magnetic and gravitational fields:…”

Section: Derivation Of the Flocculation Rate Equation Based On The Amentioning

confidence: 99%

“…Microalgae can be harvested by using magnetic nanocomposites, and 90% or above cell recovery can be achieved within 5 minutes [4][5][6][7]. In a short time, magnetic flocculants can remove heavy metal ions with low economic cost [8][9][10][11]. For instance, magnetic nanoparticle-supported layered double hydroxide nanocomposites (MLDO) could be an economical option for the removal system of As(V) and Sb(V) in water treatments considering competitive effect, maximum sorption capacity, and regeneration rate, due to their strong magnetic separability [12].…”

Section: Introductionmentioning

confidence: 99%

Flocculation Performance and Kinetics of Magnetic Polyacrylamide Microsphere under Different Magnetic Field Strengths

Wang

et al. 2020

Journal of Chemistry

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In this study, the flocculation performance and kinetics of magnetic cationic polyacrylamide (MCPAM) microspheres, compared with cationic polyacrylamide (CPAM), were systematically investigated under different magnetic field strengths. Flocculation performance was observed by jar test experiment. The density of flocs was estimated by the determination of floc settlement velocity and image analysis. The frequency distribution of floc size was measured with a Malvern Mastersizer instrument. When the diatomite suspension was treated by MCPAM and CPAM, the residual diatomite turbidity was 16.28 NTU and 244.13 NTU, respectively. The maximum turbidity removal efficiency of MCPAM was about 99.65% under 1000 Gauss magnetic field, which was higher than that (94.75%) of CPAM. The synergy of gravitational and magnetic fields for MCPAM promoted the formation of larger flocs with higher growth rates compared with CPAM. The effective density range of flocs in the MCPAM flocculation was increased to 10–252 kg m−3. The kinetic constants were calculated by monitoring the frequency of floc collisions. The increase of kinetic constant (k) to 25.81 × 10−11 s−1 suggested that interaction of contact and collision between magnetic flocs was sufficient. According to the evolution of the size and density of flocs under the synergy of gravitational and magnetic fields, the magnetic flocculation rate equation dN/dt=−1/9μρ−ρlg+ρkmHdH/dXai2−aj2−ai2e9μt/2ai2ρ+aj2e9μt/2aj2ρai+aj2 was derived. The study of magnetic flocculation kinetics can provide theoretical support for magnetic flocculation and is critical for the analysis of solid-liquid separation processes.

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“…The particles have favorable characteristics such as high magnetization, low cost, low environmental impact and high chemical stability. Hence, many reports are available in literature about chitosan-based magnetic composites: magnetic chitosan composites (Fe 3 O 4 @chitosan) were synthesized with high potential of Cr(VI) removal from water [21], magnetic composite particles with a core containing iron oxide encapsulated in cross-linked chitosan and a functionalized synthetic copolymer shell [obtained by graft-copolymerization of GMA (Glycidyl methacrylate), EGDMA (ethylene glycol dimethacrylate) and PEG-MMA (poly(ethylene glycol) methacrylate) using a water soluble azo initiator] are prepared by in situ oxidation of the ferrous ions for the removal of copper (II) ion in wastewater [22], magnetic thiolated/quaternized-chitosan composite adsorbent for removal of metal ions (As (V), As(III), Cu 2+ , Hg 2+ , Zn 2+ , Cd 2+ , Pb 2+ ), as the economy development polluted the environment with heavy metals create problems due to their high toxicity, carcinogenicity and biological accumulation [23], and many more. A simple solution mixing-evaporation method was applied to develop high-performance Fe 3 O 4 /multiwalled carbon nanotubes (MWNT)/Chitosan nanocomposite of enhanced electrical conductivity, mechanical properties, and thermal stability [24].…”

Section: Chitosan-based Compositesmentioning

confidence: 99%

Natural Polymer Composites for Environmental Applications

Shabbir¹,

Luo²

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Polymers from natural resources established an important position owing to their easy availability, abundance, biocompatibility, and sustainability. Nowadays, human beings are aware about the environmental concerns and ecofriendly practices in every aspects of life, hence demand for such materials have increased more. Polymeric composites in macro, micro, and nano scale are popular for various applications such as energy production and storage, environmental cleaning, sensing, and packaging. This book chapter is all about to review the development of natural polymers-based composite materials for environmental applications and their mode of actions. What can be the further possibilities in this area are discussed by the end of chapter.

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Magnetic thiolated/quaternized-chitosan composites design and application for various heavy metal ions removal, including cation and anion

Cited by 49 publications

References 62 publications

Thiolated Chitosans: A Multi-talented Class of Polymers for Various Applications

Thiolated Chitosans: A Multi-talented Class of Polymers for Various Applications

Flocculation Performance and Kinetics of Magnetic Polyacrylamide Microsphere under Different Magnetic Field Strengths

Natural Polymer Composites for Environmental Applications

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