Adsorption of platinum (IV), palladium (II) and gold (III) from aqueous solutions onto l-lysine modified crosslinked chitosan resin

Fujiwara, Kensuke; Ramesh, A.; Maki, Takeshi; Hasegawa, Hiroshi; Ueda, Kazuyuki

doi:10.1016/j.jhazmat.2006.11.049

Cited by 470 publications

(237 citation statements)

References 41 publications

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“…For the spectra of 2D-DAC-LC and 13D-DAC-LC, the additional peaks corresponding to N 1s (398 eV) and S 2p (164 eV) peaks can be clearly seen and the spectra of 2D-DAC-LC-Pd and 13D-DAC-LC-Pd reveal the further addition of signals for Pd 3d5 (335 eV) and Pd 3d3 (340 eV) (Moulder et al 1992). Radiation cross-linked carboxymethylchitin hydrogels 2.68 (Wasikiewicz et al 2007) Chitosan resin modified with L-lysine 109.47 (Fujiwara et al 2007) Polystyrene-divinylbenzene functionalized with isothiouronium 20 (Venkatesan et al 2005) Carbon black modified with L-Cysteine 84 (Panchompoo et al 2011) Mesoporous silica functionalized with 3-(( (5- Thermal gravimetric analysis (TGA)…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 98%

“…Several studies have investigated palladium ions adsorption using e.g. thiol-functionalized silica (Lim et al 2011;Qishu et al 2012), modified chitin or chitosan (Fujiwara et al 2007;Wasikiewicz et al 2007) and functionalized polymers or resins (Awual et al 2013;JermakowiczBartkowiak et al 2005;Venkatesan et al 2005). Among the adsorbents, some are not environmentally benign and rely on a petrol feedstock, whereas others are green, e.g.…”

Section: Introductionmentioning

confidence: 99%

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A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

2016

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A green and efficient adsorbent for adsorption of palladium ions was prepared from 2,3-dialdehyde cellulose (DAC) originating from nanocellulose from the green algae Cladophora. The DAC was functionalized with cysteine via reductive amination in a convenient one-pot procedure to provide the adsorbent. The adsorption properties for adsorbing palladium(II) ions, including capacity, adsorption isotherm and kinetics, were studied. The successful reductive amination of cysteine with 2,3-dialdehyde cellulose was confirmed by FT-IR, elemental analysis and XPS. The adsorbent was characterized by SEM, XRD, gas adsorption and TGA. The adsorbent had a high adsorption capacity (130 mg palladium per gram adsorbent) and enabled fast adsorption of palladium(II) ions from solution (80 % of maximum capacity reached in 2 h). Adsorbent materials suitable for both filters (fibrous) and column matrixes (spherical particles) could be obtained in an efficient manner by controlling the degree of oxidation while producing the DAC material.

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Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

2016

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“…31 Fujiwara et al have shown that cross-linked chitosan resin chemically modified with l-lysine can be used for adsorption of precious metal ions, such as gold, palladium, and platinum, from aqueous solutions. 32 Li et al examined the feasibility of using lysine as a cross-linker to induce self-assembly of gold nanoparticles on indium tin oxide glass and found that the molecular bridging effect of lysine and zwitterion-mediated interactions may occur at different acidic pH values. 33 In our laboratory, collagen nanofiber-based AM materials have been chemically cross-linked by exogenous carbodiimide.…”

Section: Results and Discussion Preparation Of Chemically Cross-linkementioning

confidence: 99%

Stabilization of collagen nanofibers with l-lysine improves the ability of carbodiimide cross-linked amniotic membranes to preserve limbal epithelial progenitor cells

Lai¹,

Wang²,

Luo³

et al. 2014

IJN

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To overcome the drawbacks associated with limited cross-linking efficiency of carbodiimide modified amniotic membrane, this study investigated the use of l -lysine as an additional amino acid bridge to enhance the stability of a nanofibrous tissue matrix for a limbal epithelial cell culture platform. Results of ninhydrin assays and zeta potential measurements showed that the amount of positively charged amino acid residues incorporated into the tissue collagen chains is highly correlated with the l -lysine-pretreated concentration. The cross-linked structure and hydrophilicity of amniotic membrane scaffolding materials affected by the lysine molecular bridging effects were determined. With an increase in the l -lysine-pretreated concentration from 1 to 30 mM, the cross-linking density was significantly increased and water content was markedly decreased. The variations in resistance to thermal denaturation and enzymatic degradation were in accordance with the number of cross-links per unit mass of amniotic membrane, indicating l -lysine-modulated stabilization of collagen molecules. It was also noteworthy that the carbodiimide cross-linked tissue samples prepared using a relatively high l -lysine-pretreated concentration (ie, 30 mM) appeared to have decreased light transmittance and biocompatibility, probably due to the influence of a large nanofiber size and a high charge density. The rise in stemness gene and protein expression levels was dependent on improved cross-link formation, suggesting the crucial role of amino acid bridges in constructing suitable scaffolds to preserve limbal progenitor cells. It is concluded that mild to moderate pretreatment conditions (ie, 3–10 mM l -lysine) can provide a useful strategy to assist in the development of carbodiimide cross-linked amniotic membrane as a stable stem cell niche for corneal epithelial tissue engineering.

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“…Gold, silver, platinum and palladium are internationally recognized as forms of currency under ISO 4217 [4]. Technological and analytical platinumcontaining solutions have diverse ratios of the concentrations of platinum and associate precious, base, and ferrous metals, acidities, and salt backgrounds.…”

Section: Introductionmentioning

confidence: 99%

Liquid Anion Exchange Chromatographic Extraction and Separation of Platinum (IV) with N-Octylaniline as an Metallurgical Reagent: Analysis of Real Samples

Gaikwad¹

2013

J Chromat Separation Techniq

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Adsorption of platinum (IV), palladium (II) and gold (III) from aqueous solutions onto l-lysine modified crosslinked chitosan resin

Cited by 470 publications

References 41 publications

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

Stabilization of collagen nanofibers with l-lysine improves the ability of carbodiimide cross-linked amniotic membranes to preserve limbal epithelial progenitor cells

Liquid Anion Exchange Chromatographic Extraction and Separation of Platinum (IV) with N-Octylaniline as an Metallurgical Reagent: Analysis of Real Samples

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