Application of chitosan and its N-heterocyclic derivatives for preconcentration of noble metal ions and their determination using atomic absorption spectrometry

Azarova, Yu. A.; Пестов, А. В.; Ustinov, A. Yu.; Bratskaya, Svetlana

doi:10.1016/j.carbpol.2015.07.086

Cited by 24 publications

(9 citation statements)

References 33 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analysis of sorption properties of N-containing chitosan derivatives— N -2-(2-pyridyl)ethylchitosan ( 2-PEC ), N -2-(4-pyridyl)ethylchitosan ( 4-PEC ), and N -(5-methyl-4-imidazolyl)methylchitosan ( IMC ) [78,82,158]—revealed the following interesting trends [158]: (i) increase of affinity toward Pt(IV) and Pd(II) ions from 0.1M HCl solutions for all derivatives in comparison with chitosan and changes of their sorption capacities the row 2-PEC > 4-PEC > IMC > chitosan; (ii) unexpectedly high sorption capacity of chitosan for Au(III) ions ( 2-PEC > chitosan > IMC ≥ 4-PEC ) that distorts the row of derivatives affinity found for Pt(IV) and Pd(II) ions.…”

Section: Mechanisms Of Interaction Of Chitosan and Its Derivativesmentioning

confidence: 99%

“…It was found that sorption of Au(III) and Pt(IV) by chitosan, 2-PEC , 4-PEC , and IMC was accompanied by complete or partial metal reduction. The ratio between forms in different oxidation state in sorbent phase depends on the type of derivative with the highest content of reduced species—Au(0) and Pt(II) found in chitosan [158]. Taking into account literature data on Au(III) reduction to Au(0) in the process of sorption on polystyrene-supported glucosamine resin [160], chitosan [159] and other N -containing derivatives of biopolymers [161,162], one can suggest that formation of elemental gold was the most probable reason for high sorption capacity of unmodified chitosan for Au(III) ions.…”

Section: Mechanisms Of Interaction Of Chitosan and Its Derivativesmentioning

confidence: 99%

See 1 more Smart Citation

Chitosan and Its Derivatives as Highly Efficient Polymer Ligands

2016

View full text Add to dashboard Cite

Abstract:The polyfunctional nature of chitosan enables its application as a polymer ligand not only for the recovery, separation, and concentration of metal ions, but for the fabrication of a wide spectrum of functional materials. Although unmodified chitosan itself is the unique cationic polysaccharide with very good complexing properties toward numerous metal ions, its sorption capacity and selectivity can be sufficiently increased and turned via chemical modification to meet requirements of the specific applications. In this review, which covers results of the last decade, we demonstrate how different strategies of chitosan chemical modification effect metal ions binding by O-, N-, S-, and P-containing chitosan derivatives, and which mechanisms are involved in binding of metal cation and anions by chitosan derivatives.

show abstract

Section: Mechanisms Of Interaction Of Chitosan and Its Derivativesmentioning

confidence: 99%

Section: Mechanisms Of Interaction Of Chitosan and Its Derivativesmentioning

confidence: 99%

Chitosan and Its Derivatives as Highly Efficient Polymer Ligands

2016

View full text Add to dashboard Cite

show abstract

“…Azarova et al showed that the N-(5-methyl-4-imidazolyl) methyl-grafted chitosan had excellent selectivity towards Au(III) and Pd(II) [26,27]. Pd(II) chloride forms square planar complexes with negative charges shown in Figure 2 [26].…”

Section: N-containing Chitosan Derivativesmentioning

confidence: 99%

An Overview of Modified Chitosan Adsorbents for the Removal of Precious Metals Species from Aqueous Media

2022

View full text Add to dashboard Cite

This mini-review provides coverage of chitosan-based adsorbents and their modified forms as sustainable solid-phase extraction (SPE) materials for precious metal ions, such as gold species, and their complexes in aqueous media. Modified forms of chitosan-based adsorbents range from surface-functionalized systems to biomaterial composites that contain inorganic or other nanomaterial components. An overview of the SPE conditions such as pH, temperature, contact time, and adsorbent dosage was carried out to outline how these factors affect the efficiency of the sorption process, with an emphasis on gold species. This review provides insight into the structure-property relationships for chitinaceous adsorbents and their metal-ion removal mechanism in aqueous media. Cross-linked chitosan sorbents showed a maximum for Au(III) uptake capacity (600 mg/g), while S-containing cross-linked chitosan display favourable selectivity and uptake capacity with Au(III) species. Compared to industrial adsorbents such as activated carbon, modified chitosan sorbents display favourable uptake of Au(III) species, especially in aqueous media at low pH. In turn, this contribution is intended to catalyze further research directed at the rational design of tailored SPE materials that employ biopolymer scaffolds to yield improved uptake properties of precious metal species in aqueous systems. The controlled removal of gold and precious metal species from aqueous media is highly relevant to sustainable industrial processes and environmental remediation.

show abstract

“…CHI-metal binding properties and stability in solution have been investigated using several analytical methods [10], including UV-vis spectrophotometry [11], atomic absorption spectrometry [12,13], zeta potential [13], potentiometric titration [1] and inductively couple plasma-optical emission spectroscopy [14].…”

Section: Introductionmentioning

confidence: 99%

Time-domain NMR relaxometry as an alternative method for analysis of chitosan-paramagnetic ion interactions in solution

Kock

Monaretto

Colnago

2017

International Journal of Biological Macromolecules

View full text Add to dashboard Cite

Chitosan (CHI)-paramagnetic ion interactions in aqueous solution as affected by pH were studied using time-domain NMR (TD-NMR) relaxometry. Longitudinal (T) and transverse (T) relaxation times of CHI solutions with Fe, Cu, and Mn were measured using a single-shot pulse sequence named CP-CWFP. The results indicate that CHI interacted with Fe ions or iron oxide nanoparticles, maintaining the metal ion in solution at pH ranging from 3 to 5. Above this pH, CHI coagulated and removed Fe ions or nanoparticles, resulting in a clear supernatant. CHI probably interacted with Cu ions at pH 6.2 through the deprotonated CHI-NH groups maintaining the relaxation effect in alkaline solution, whereas Mn did not interact with CHI strongly enough to produce a complex of high stability. The proposed method can also be further exploited in the study of interactions paramagnetic ions with others CHI and CHI derivatives as well as of other water-soluble polysaccharides.

show abstract

Application of chitosan and its N-heterocyclic derivatives for preconcentration of noble metal ions and their determination using atomic absorption spectrometry

Cited by 24 publications

References 33 publications

Chitosan and Its Derivatives as Highly Efficient Polymer Ligands

Chitosan and Its Derivatives as Highly Efficient Polymer Ligands

An Overview of Modified Chitosan Adsorbents for the Removal of Precious Metals Species from Aqueous Media

Time-domain NMR relaxometry as an alternative method for analysis of chitosan-paramagnetic ion interactions in solution

Contact Info

Product

Resources

About