Sorption of heavy metal ions onto carboxylate chitosan derivatives—A mini-review

Boamah, Peter Osei; Huang, Yan; Hua, Mingqing; Zhang, Qi; Wu, Jingbo; Onumah, Jacqueline; Sam-Amoah, Livingstone K.; Boamah, Paul Osei

doi:10.1016/j.ecoenv.2015.01.012

Cited by 166 publications

(52 citation statements)

References 122 publications

(134 reference statements)

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“…Previous studies [20,21] have reported that chitosan and chitosan modified derivatives could be widely used in water treatment. For example, Bratskaya et al dedicated themselves to the removal of heavy metal ions, discussing the potential of chitosan derivatives (Ncarboxyethyl chitosan, CEC) in the removal of heavy metals [Cu (II), Zn(II) and Ni(II)] from water by the flocculation/precipitation process [22].…”

Section: Introductionmentioning

confidence: 99%

Removal of Cu(II) and tetracycline using an aromatic rings-functionalized chitosan-based flocculant: Enhanced interaction between the flocculant and the antibiotic

Jia

Yang

et al. 2016

Chemical Engineering Journal

109

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Section: Introductionmentioning

confidence: 99%

Removal of Cu(II) and tetracycline using an aromatic rings-functionalized chitosan-based flocculant: Enhanced interaction between the flocculant and the antibiotic

Jia

Yang

et al. 2016

Chemical Engineering Journal

109

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“…It was also proven by the ratios of (O + N)/C, which indicated the polarity of the biochar composites (CC, C-Fe and CC-Fe) became higher than that of pristine biochar (BC). These increased polarity and decreased aromaticity of biochar composites may be because of the presence of hydroxyl polarity groups and amino or γ-Fe 2 O 3 (Boamah et al 2015;. Table 2 presents the pore structure and surface area characterization of BC, C-Fe, CC and CC-Fe.…”

Section: Elemental Analysismentioning

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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“…The spectrophotometric data allowed the experimental estimation of the ultimate concentration of Cu 2+ ions capable of binding to PHum and two NIPECs (Table ). On the other hand, it follows from the literature (Boamah et al, ; Zhao, Wang, Zhang, Gu, & Gao, ) divalent metal ions typically form two ionic bonds with carboxylic groups of water‐soluble polymers. This offers another way to calculate the saturating Cu 2+ concentration (column 5).…”

Section: Resultsmentioning

confidence: 99%

Humics‐based interpolyelectrolyte complexes for antierosion protection of soil: Model investigation

et al. 2018

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The aim of this article is to demonstrate a novel polymer‐based technique for stabilization of soil against wind and water erosion. Conventional approaches deal with individual water‐soluble polymers, which, being deposited on the soil, are removed from the soil surface after rewatering. Here, we describe an elegant way for soil stabilization via deposition of interpolyelectrolyte complexes formed by two oppositely charged water‐soluble polymers. Electrostatic complexation in an aqueous solution of a cationic poly(diallyldimethylammonium chloride) with an excess of water‐soluble anionic biopolymers, humic acids, results in formation of a negative non‐stoichiometric interpolyelectrolyte complex (NIPEC). Upon deposition of a NIPEC aqueous solution over soil and drying out, a protective layer (crust) forms on the surface, composed of NIPEC and soil particles, resistant to wind and water erosion. After destruction, the crust is completely restored by rewatering. The high stability of the NIPEC‐soil crust is due to a NIPEC block structure with hydrophilic free anionic units and hydrophobic mutually neutralized anionic/cationic units, which ensures optimum adsorption on the surface of soil particles and binds them to bigger aggregates. The NIPEC treatment retains the porous structure of soil that favors seed germination and plant development. Being effective absorbent of heavy metals, the NIPEC formulation ensures a normal seed germination in the presence of toxic Cu2+ ions. Thus, the humics‐based NIPECs ensures antierosion protection and detoxification of soil. Additionally to ecological and agricultural applications, the NIPEC formulations have potential for immobilization of moving sands, conservation of mining dumps, treatment of road slopes, and so forth.

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Sorption of heavy metal ions onto carboxylate chitosan derivatives—A mini-review

Cited by 166 publications

References 122 publications

Removal of Cu(II) and tetracycline using an aromatic rings-functionalized chitosan-based flocculant: Enhanced interaction between the flocculant and the antibiotic

Removal of Cu(II) and tetracycline using an aromatic rings-functionalized chitosan-based flocculant: Enhanced interaction between the flocculant and the antibiotic

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

Humics‐based interpolyelectrolyte complexes for antierosion protection of soil: Model investigation

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