Amino-functionalized magnetic chitosan beads to enhance immobilization of potassium copper hexacyanoferrate for selective Cs<sup>+</sup> removal and facile recovery

Roh, Hyelin; Kim, Yonghwan; Kim, Yun Kon; Harbottle, David; Lee, Jae Woo

doi:10.1039/c8ra09386e

Cited by 27 publications

(6 citation statements)

References 57 publications

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“…Hexacyanoferrates (HCFs) of various transition metals have once again begun to attract attention as sorbents in the selective extraction of Cs + ions. 1,2,3,4,5,6,7,8,9,10 This is due to their high sorption capacity for caesium over a wide pH range, in high salinity, and their high stability. 11,12,13,14,15 In case of K-Hexacyanoferrates of transition metals, and especially Cu-HCF, the Cs + sorption mechanism occurs via an ionic exchange between K + from the solid structure and Cs + from the solution.…”

Section: Introductionmentioning

confidence: 99%

Tuning the thermal stability of copper(II) hexacyanoferrate(II) nanoparticles

Moloney

Massoni

Grandjean

2020

J Therm Anal Calorim

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It is well known that the physical properties of nanoparticles can be tuned by controlling synthetic factors such as pH, temperature, reactant ratio or type of stabiliser used. In this work the reactant ratio is varied to produce batches of Copper (II) Hexacyanoferrate (II) (Cu-HCF) with different cyano decomposition temperatures. This is accomplished by controlling the number of Fe(CN)6 4site vacancies throughout the structure. By reducing the number of vacancies, and consequently the need for water to complete the structure, the thermal decomposition temperature of Cu-HCF can be increased. In addition to this we also note that the guest ion similarly contributes to the decomposition temperature. By exchanging K + with Cs + an increased resistance to thermal decomposition is realised. As the incorporation of Cs + ions into the structure does not alter the number of Fe(CN)6 4site vacancies this enhancement is attributed to a change in the geometry of the copper co-ordination sphere.

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Section: Introductionmentioning

confidence: 99%

Tuning the thermal stability of copper(II) hexacyanoferrate(II) nanoparticles

Moloney

Massoni

Grandjean

2020

J Therm Anal Calorim

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“… 42 . The XRD pattern of chitosan appeared as one broad peak at 19.87° 43 confirm the amorphous structure of chitosan as the occurrence of broad peak at 20.1°. In the MchiBs spectrum, all-characteristic peaks of pure magnetite and chitosan appeared in Fig.…”

Section: Characterizationmentioning

confidence: 53%

Aspergillus tamarii mediated green synthesis of magnetic chitosan beads for sustainable remediation of wastewater contaminants

El-Sharkawy

Swelim

Hamdy

2022

Sci Rep

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The release of different hazardous substances into the water bodies during the industrial and textile processing stages is a serious problem in recent decades. This study focuses on the potentiality of Fe3O4-NPs-based polymer in sustainable bioremediation of toxic substances from contaminated water. The biosynthesis of Fe3O4-NPs by A. tamarii was performed for the first time. The effect of different independent variables on the Fe3O4-NPs production were optimized using Plackett–Burman design and central composite design (CCD) of Response Surface Methodology. The optimum Fe3O4-NPs production was determined using incubation period (24 h), temperature (30 °C), pH (12), stirring speed (100 rpm) and stirring time (1 h). The incorporation of Fe3O4-NPs into chitosan beads was successfully performed using sol–gel method. The modified nanocomposite exhibited remarkable removal capability with improved stability and regeneration, compared to control beads. The optimal decolorization was 94.7% at 1.5 g/l after 90 min of treatment process. The reusability of biosorbent beads displayed 75.35% decolorization after the 7th cycle. The results showed a highly significant reduction of physico-chemical parameters (pH, TDS, TSS, COD, EC, and PO4) of contaminated wastewater. The sorption trials marked Fe3O4-NPs-based biopolymer as efficient and sustainable biosorbent for the elimination of hazardous toxic pollutants of wastewater in a high-speed rate.

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“…FT-IR spectrum of CMC ( Figure 4 b) exhibited broad bands at 3300–3500 cm −1 , 1422 and 1607, and 1000 and 1200 cm −1 , which were assigned to the stretching of -OH groups, symmetrical and asymmetrical stretching vibrations of the COO– groups and –C–O stretching on the polysaccharide skeleton, respectively [ 4 , 39 ]. All the bands were present in CMC/CuO-Co 2 O 3 ( Figure 4 c), while for chitosan coating beads Cs@CMC/CuO-Co 2 O 3 ( Figure 4 d) new bands at 1155 and 1654 cm −1 appeared, which were attributed to the saccharide and (–NH 2 ) amine group in chitosan polymer [ 40 ]. All the peaks that appeared in the Ni/Cs@ CMC/CuO-Co 2 O 3 beads are clearly seen in Figure 4 e.…”

Section: Resultsmentioning

confidence: 99%

Chitosan@Carboxymethylcellulose/CuO-Co2O3 Nanoadsorbent as a Super Catalyst for the Removal of Water Pollutants

Maslamani

Bakhsh

Khan

et al. 2022

Gels

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In this work, an efficient nanocatalyst was developed based on nanoadsorbent beads. Herein, carboxymethyl cellulose–copper oxide-cobalt oxide nanocomposite beads (CMC/CuO-Co2O3) crosslinked by using AlCl3 were successfully prepared. The beads were then coated with chitosan (Cs), Cs@CMC/CuO-Co2O3. The prepared beads, CMC/CuO-Co2O3 and Cs@CMC/CuO-Co2O3, were utilized as adsorbents for heavy metal ions (Ni, Fe, Ag and Zn). By using CMC/CuO-Co2O3 and Cs@CMC/CuO-Co2O3, the distribution coefficients (Kd) for Ni, Fe, Ag and Zn were (41.166 and 6173.6 mLg−1), (136.3 and 1500 mLg−1), (20,739.1 and 1941.1 mLg−1) and (86.9 and 2333.3 mLg−1), respectively. Thus, Ni was highly adsorbed by Cs@CMC/CuO-Co2O3 beads. The metal ion adsorbed on the beads were converted into nanoparticles by treating with reducing agent (NaBH4) and named Ni/Cs@CMC/CuO-Co2O3. Further, the prepared nanoparticles-decorated beads (Ni/Cs@CMC/CuO-Co2O3) were utilized as nanocatalysts for the reduction of organic and inorganic pollutants (4-nitophenol, MO, EY dyes and potassium ferricyanide K3[Fe(CN)6]) in the presence of NaBH4. Among all catalysts, Ni/Cs@CMC/CuO-Co2O3 had the highest catalytic activity toward MO, EY and K3[Fe(CN)6], removing up to 98% in 2.0 min, 90 % in 6.0 min and 91% in 6.0 min, respectively. The reduction rate constants of MO, EY, 4-NP and K3[Fe(CN)6] were 1.06 × 10−1, 4.58 × 10−3, 4.26 × 10−3 and 5.1 × 10−3 s−1, respectively. Additionally, the catalytic activity of the Ni/Cs@CMC/CuO-Co2O3 beads was effectively optimized. The stability and recyclability of the beads were tested up to five times for the catalytic reduction of MO, EY and K3[Fe(CN)6]. It was confirmed that the designed nanocomposite beads are ecofriendly and efficient with high strength and stability as catalysts for the reduction of organic and inorganic pollutants.

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Amino-functionalized magnetic chitosan beads to enhance immobilization of potassium copper hexacyanoferrate for selective Cs⁺ removal and facile recovery

Abstract: The magnetic chitosan beads were amino-functionalized by grafting and showed an outstanding removal performance for radioactive Cs+.

Cited by 27 publications

References 57 publications

Tuning the thermal stability of copper(II) hexacyanoferrate(II) nanoparticles

Tuning the thermal stability of copper(II) hexacyanoferrate(II) nanoparticles

Aspergillus tamarii mediated green synthesis of magnetic chitosan beads for sustainable remediation of wastewater contaminants

Chitosan@Carboxymethylcellulose/CuO-Co2O3 Nanoadsorbent as a Super Catalyst for the Removal of Water Pollutants

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Amino-functionalized magnetic chitosan beads to enhance immobilization of potassium copper hexacyanoferrate for selective Cs+ removal and facile recovery

Abstract: The magnetic chitosan beads were amino-functionalized by grafting and showed an outstanding removal performance for radioactive Cs+.

Cited by 27 publications

References 57 publications

Tuning the thermal stability of copper(II) hexacyanoferrate(II) nanoparticles

Tuning the thermal stability of copper(II) hexacyanoferrate(II) nanoparticles

Aspergillus tamarii mediated green synthesis of magnetic chitosan beads for sustainable remediation of wastewater contaminants

Chitosan@Carboxymethylcellulose/CuO-Co2O3 Nanoadsorbent as a Super Catalyst for the Removal of Water Pollutants

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Product

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Amino-functionalized magnetic chitosan beads to enhance immobilization of potassium copper hexacyanoferrate for selective Cs⁺ removal and facile recovery