Chitosan-based biosorbents: Modification and application for biosorption of heavy metals and radionuclides

Wang, Jianlong; Chen, Can

doi:10.1016/j.biortech.2013.12.110

Cited by 526 publications

(152 citation statements)

References 63 publications

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“…Chitosan is an inexpensive, easily available, renewable, and nontoxic product of the shellfish processing industry and is one of the most abundant natural polysaccharide (Kittur et al 2003). Due to the high reactivity and excellent chelation characteristic, chitosan and its derivatives were explored and used as biosorbents in the treatment of heavy metals from environment (Wu et al 2010;Wang and Chen 2014). Although chitosan materials show a superior adsorption capacity to inorganic and organic contaminants (Reddy and Lee 2013), the solubility and low stability are the main disadvantages for the applications of chitosan.…”

Section: Introductionmentioning

confidence: 99%

Effective Removal of Copper (II) and Cadmium (II) by Adsorbent Prepared from Chitosan-modified Magnetic Biochar

Song¹,

Yang²,

Cao³

2016

JRST

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A novel chitosan-modified magnetic biochar composite (CC-Fe) was synthesized by embedding Fe 2 O 3 and assembling chitosan in two-step. The properties of CC-Fe were characterized systematically by elemental analysis, Brunauer-Emmett-Teller (BET) surface area, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and batch sorption processes. The prepared adsorbent composite was comprised of magnetic particulates of Fe 2 O 3 and multifunctional group, and thus exhibited high sorption capability to remove copper (II) or cadmium (II) from waste water. For both copper (II) and cadmium (II), CC-Fe demonstrated a higher sorption capability (98% and 97%) than the non-chitosan magnetic biochar (11% and 7%). The sorption experimental results showed that the composite is a potential sorbent to remove copper (II) and cadmium (II). Due to its excellent magnetic characteristic, the heavy metal-laden CC-Fe could be isolated again from treated solution and reused after the desorption treatment. The functional groups of CC-Fe made efforts to the removal of heavy metals.

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Section: Introductionmentioning

confidence: 99%

Effective Removal of Copper (II) and Cadmium (II) by Adsorbent Prepared from Chitosan-modified Magnetic Biochar

Song¹,

Yang²,

Cao³

2016

JRST

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“…There are many methods for the removal of heavy metal ions from aqueous solution, such as precipitation [7], biosorption [8][9][10], membrane separation [11], and so on. Among them, biosorption has received increasing attention in recent years due to its low cost and high efficiency for the removal of heavy metal ions form water and wastewater [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Modified alginate beads as biosensor and biosorbent for simultaneous detection and removal of cobalt ions from aqueous solution

Zhuang

Wang

2017

Env Prog and Sustain Energy

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A novel biomaterial was prepared to simultaneously detect and remove cobalt ions from aqueous solution by modifying alginate (AG) polymer with a high selectivity and sensitive indicator for Co , the color of the modified AG beads changed from yellow to pink, resulting in a noticeable change, which can be observed by naked eyes. The adsorption of Co 21 by the modified AG beads can be described by pseudo second-order kinetic model and the Freundlich isotherm model. The AG bead modified with an indicator is a promising biosensor and biosorbent for simultaneous detection and removal of cobalt ions from aqueous solution.

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“…Some materials of biological origin possessing the ability of adsorbing heavy metals ions can be used for easy removal from the water. Chitosan successfully binds metals ions, both anions and cations via chelating process and/or by electrostatic interactions [11][12][13][14][15]. Physical modification, like mixing with other polymers, and chemical cross-linking or grafted copolymers synthesis make possible biosorbent production characterized by high selectivity and sorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Microwave-enhanced synthesis of biodegradable multifunctional chitosan hydrogels for wastewater treatment

Piątkowski¹,

Janus²,

Radwan-Pragłowska³

et al. 2017

Express Polym. Lett.

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Abstract. Chitosan, a derivative of chitin, is a biodegradable polymer known of its favorable properties, applicable in medicine and industry. Commonly obtained chitosan hydrogels are of various swelling capacity, and may bind only anions losing their susceptibility to biodegradation. Hydrogels are mostly obtained using toxic crosslinkers, which pollute environment due to waste generation during their synthesis. In the present article a novel, waste-free method for obtaining chitosan hydrogels under microwave irradiation, is described. Their chemical and morphological structure, swelling properties, sorption capability of a model dye and cadmium ions are described, and kinetic studies, were carried out. Biodegradability of the obtained hydrogels was investigated with the Sturm Test method. As a result, multifunctional chitosan hydrogels with both negative and positive surface charges and increased ability of anions and cations binding, were obtained. Materials were fully biodegradable, capable to absorb high amounts of water, as well as to remove various water contaminants.

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Chitosan-based biosorbents: Modification and application for biosorption of heavy metals and radionuclides

Cited by 526 publications

References 63 publications

Effective Removal of Copper (II) and Cadmium (II) by Adsorbent Prepared from Chitosan-modified Magnetic Biochar

Effective Removal of Copper (II) and Cadmium (II) by Adsorbent Prepared from Chitosan-modified Magnetic Biochar

Modified alginate beads as biosensor and biosorbent for simultaneous detection and removal of cobalt ions from aqueous solution

Microwave-enhanced synthesis of biodegradable multifunctional chitosan hydrogels for wastewater treatment

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