Investigation of mechanisms for simultaneous adsorption of iron and sulfate ions onto chitosan with formation of orthorhombic structures

Weißpflog, Janek; Boldt, Regine; Kohn, Benjamin; Scheler, Ulrich; Jehnichen, Dieter; Tyrpekl, Václav; Schwarz, Simona

doi:10.1016/j.colsurfa.2020.124575

Cited by 23 publications

(10 citation statements)

References 29 publications

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“…Furthermore, Mitani, et al [29] suggested that SO4 2may have caused some conformational change of chitosan, making it easy for the Ni(II) ions to interact with the chitosan surface. SO4 2ions tend to accumulate in the chitosan chains and crosslink the protonated amine groups, introducing negative charges that are capable of complexing metal cations [49].…”

Section: Effect Of So4 2on Ni(ii) Adsorptionmentioning

confidence: 99%

Selective and enhanced nickel adsorption from sulfate- and calcium-rich solutions using chitosan

Nicomel

Otero-González

Folens

et al. 2021

Separation and Purification Technology

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Highlights• Chitosan effectively adsorbed Ni from a real Ni/Ca/SO4 2bearing leachate • Sulfate had a positive effect on Ni adsorption while Ca did not have any effect• Formation of NiSO4 0 species contributed to the enhanced Ni adsorption onto chitosan • Chitosan has a Ni qmax of 1.49 mmol/g even with 500 mM SO4 2and 10 mM Ca present • Chitosan was selective for Ni over Ca as validated in a column setup ABSTRACT Nickel (Ni) is an economically important metal characterized by its mechanical strength and anticorrosion properties. With the increasing industrial demand for Ni and the depleting accessible Ni primary ores, sustainable technologies are required for the recovery of this metal from alternative resources. In this study, adsorption using chitosan was investigated as a sustainable technique to recover Ni from sulfate (SO4 2-) and calcium (Ca) rich secondary resources. The effects of pH, contact time, and the presence of SO4 2and Ca on Ni adsorption were investigated in batch experiments. Chemical speciation modeling was performed to analyze how the predominant Ni species present under different conditions may affect the efficiency of the adsorption process. The comparison of chitosan's maximum Ni adsorption capacities in the absence (1.00 mmol/g) and presence (1.49 mmol/g) of 500 mM SO4 2and 10 mM Ca indicated the positive effect of these ions on Ni adsorption. The predominance of the neutrally charged NiSO4 0 species in Ni/SO4 2system has contributed to the enhanced Ni adsorption on chitosan as verified by X-ray photoelectron spectroscopy (XPS) analysis.However, kinetic studies confirmed that the Ni adsorption rate decreased by 4.5 times when SO4 2was present. The subsequent continuous Ni adsorption from a real SO4 2--rich leachate in a column setup revealed that chitosan is selective for Ni over Ca and Cr with selectivity quotients of 9.6 (KNi/Ca) and 3.0 (KNi/Cr). Overall, this study indicated that Ni complexation with SO4 2enhances the Ni adsorption capacity of chitosan, but slows down the adsorption process.

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Section: Effect Of So4 2on Ni(ii) Adsorptionmentioning

confidence: 99%

Selective and enhanced nickel adsorption from sulfate- and calcium-rich solutions using chitosan

Nicomel

Otero-González

Folens

et al. 2021

Separation and Purification Technology

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“…Figure 1b exhibits the XRD patterns of CS, MEE, and MCBNC.As seen from Figure1b, the characteristic broadly diffraction peak at 2θ = 19.82° indicates the amorphous structure of CS(Weißpflog et al, 2020). In the case of the MEE pattern, a significant broad peak at 2θ = 20.42° and the peaks at 2θ = 9.78°, 30.75°, 36.06°, 44.91°, 46.47°, 57.14° were observed.…”

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confidence: 92%

“…Tietel and Masaphy (2018) stated that phytochemical groups reported in M. esculenta include polyphenols, steroids (mainly sterol derivatives), flavonoids, alkaloids, tocopherols, carotenoids. Fatty acids are among the primary and secondary compounds present in M. esculenta (Tietel & Masaphy, 2018).…”

Section: Introductionmentioning

confidence: 99%

Morchella esculenta ‐based chitosan bionanocomposites: Evaluation as an antifungal agent

Acay

Yıldırım

Güney

2022

Food Processing Preservation

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Considering the damage caused by fungicides to human health and problems such as microbial resistance, biological control against plant pathogens has started to gain importance worldwide. This research demonstrates a new, simple, cost‐effective, and environmentally friendly method for synthesizing chitosan bionanocomposite (CBNC) from Morchella esculenta (L) Pers‐extract (MEE). The antifungal property of the synthesized Morchella esculenta (L) Pers‐chitosan bionanocomposite (MCBNC) against some plant pathogens was also evaluated. FTIR, XRD, FE‐SEM, DSC, TGA, and BET were used to characterize the synthesized MCBNC. Mushroom‐based chitosan nanoparticles were evaluated for antifungal activity against some fungal pathogens, including Neoscytalidium novaehollandiae, N. dimidiatum, Alternaria alternata, Verticillium dahliae, Bipolaris sorokiniana, and Colletotrichum sp. The findings obtained clearly showed that chitosan nanoparticles have antifungal activity. The results suggest that the chitosan nanoparticle can be used in the field to protect various crops from phytopathogens. Novelty impact statement Chitosan bionanocomposite (MCBNC) synthesis was performed for the first time using the wild mushroom Morchella esculenta, which has strong bioactive properties. It was observed that the bionanomaterial, which was characterized by FTIR, XRD, FE‐SEM, DSC, TGA, and BET analyses, has high antifungal activity against plant pathogens such as Alternaria alternata and Bipolaris sorokiniana. MCBNCs synthesized by the green synthesis method can be an important area of use in the fight against plant pathogens, which corresponds to 1/3 of the world's agricultural production potential.

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“…The properties of chitosan such as the solubility and positive charge at low pH values are greatly influenced by the molecular weight and the degree of deacetylation. Chitosan, either chemically modified or unmodified, is reported to be a viable adsorber material for the removal of heavy metal ions [15][16][17][18] and can also be applied for flocculation processes [19,20]. It was also reported to be an efficient flocculant for NOM itself [21] or together with humic acid for clay [22].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Flocculation of Silica and China Clay with Chitosan and Synthetic Polyelectrolytes

et al. 2021

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Flocculation is still one of the most important and efficient processes for water treatment. However, most industrial processes, such as in water treatment plants, still use huge amounts of synthetic polyelectrolytes for the flocculation process. Here we compare the flocculation of two different suspended particles, i.e., silica particles and china clay, with the biopolymer chitosan and two common strong synthetic polyelectrolytes. As a flocculant, chitosan featured a minimum uptake rate of 0.05 mg/g for silica and 1.8 mg/g for china clay. Polydiallyldimethylammonium chloride (PDADMAC) for comparison possessed a minimum uptake rate of 0.05 mg/g for silica and 2.2 mg/g for china clay. Chitosan as an environmentally friendly biopolymer competes with the synthetic polyelectrolytes and thus represents a beneficial economic alternative to synthetic flocculants.

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Investigation of mechanisms for simultaneous adsorption of iron and sulfate ions onto chitosan with formation of orthorhombic structures

Cited by 23 publications

References 29 publications

Selective and enhanced nickel adsorption from sulfate- and calcium-rich solutions using chitosan

Selective and enhanced nickel adsorption from sulfate- and calcium-rich solutions using chitosan

Morchella esculenta ‐based chitosan bionanocomposites: Evaluation as an antifungal agent

A Comparative Study on the Flocculation of Silica and China Clay with Chitosan and Synthetic Polyelectrolytes

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