Adsorption of Cu2+ or Hg2+ Ion on Resins Prepared by Crosslinking Metal-Complexed Chitosans

Ohga, Kazuya; Kurauchi, Yoshiaki; Yanase, Hiroshi

doi:10.1246/bcsj.60.444

Cited by 90 publications

(37 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In recent years, from the view point of environmental safety, much attention has been paid to the collection and separation of metal ions on various kinds of biomass, such as alginic acid, cellulose, chitin, and chitosan. [1][2][3][4] Chitosan is a glucosamine biopolymer, obtained by deacetylating chitin, which is one of the most abundant biomass. Chitosan, possessing amino groups and hydroxyl groups, is an excellent base material for analytical fields.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Cationic and Anionic Species on Chitosan Resins Possessing Amino Acid Moieties

et al. 2007

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Cationic and Anionic Species on Chitosan Resins Possessing Amino Acid Moieties

et al. 2007

View full text Add to dashboard Cite

“…Cross-linking can make chitosan hardly soluble in acidic media. Ohga et al reported that cross-linked chitosan, which was prepared by cross-linking with (chloromethyl)oxyrane after complexation of chitosan with metal ions, can act as effective adsorbents for Cu(II) and Hg(II), 9 and Inoue et al reported the adsorption behavior of 15 elements on cross-linked chitosan by a batchwise method.10,11 Koyama et al and Kurita et al also synthesized a cross-linked chitosan with glutaraldehyde, and examined the adsorption behavior of Cu. 12,13 Further, Rorrer et al examined adsorption isotherms of Cd(II) on porous chitosan beads crosslinked with glutaraldehyde at 25˚C and pH 6.5 over the concentration range 1 -1690 mg l -1 .…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Adsorption Behavior of Metal Ions on Cross-linked Chitosan and the Determination of Oxoanions after Pretreatment with a Chitosan Column

et al. 2000

View full text Add to dashboard Cite

Chitosan, an N-deacetylation product of chitin, is one of the useful chelating polymers, and is capable of adsorbing a number of metal ions. Muzzarelli et al. have reported that chitosan without cross-linking can adsorb transition-metal ions from aqueous solutions at neutral pH, 1,2 and other researchers have reported that chitosan can adsorb Hg(II), Cu(II), Cr(III), Pb(II), UO2 + and Cd(II). [3][4][5][6][7][8] However, the adsorption behavior of metal ions has not yet been investigated in detail, though chitosan seems to possess a promising ability of metal collection.Non-cross-linked chitosan can be easily soluble in some acidic media. Such a characteristic is one of the serious disadvantages from a practical viewpoint of metal collection and concentration. Therefore, several types of chemically cross-linked chitosan have been prepared and their metal adsorption properties have been examined. Cross-linking can make chitosan hardly soluble in acidic media. Ohga et al. reported that cross-linked chitosan, which was prepared by cross-linking with (chloromethyl)oxyrane after complexation of chitosan with metal ions, can act as effective adsorbents for Cu(II) and Hg(II), 9 and Inoue et al. reported the adsorption behavior of 15 elements on cross-linked chitosan by a batchwise method.10,11 Koyama et al. and Kurita et al. also synthesized a cross-linked chitosan with glutaraldehyde, and examined the adsorption behavior of Cu. 12,13 Further, Rorrer et al. examined adsorption isotherms of Cd(II) on porous chitosan beads crosslinked with glutaraldehyde at 25˚C and pH 6.5 over the concentration range 1 -1690 mg l -1 .14 Such studies mainly examined the adsorption behavior of several metal ions at ppm levels on a cross-linked chitosan by batchwise equilibration techniques, and did not aim to collect and concentrate trace amounts of metal ions at ppb and subppbs (1 ppb = 1 ng ml -1 ). Further, few papers have reported so far about the desorption and recovery of metal ions adsorbed on cross-linked and non-cross-linked chitosan.In this work, the authors examined in detail, for the first time, the adsorption behavior of a number of elements (60 elements) at the 10 ng ml -1 level by a column pretreatment method using commercially available high-porous cross-linked chitosan beads (CHITOPEARL AL-01) (Fuji Spinning Co., Ltd. Tokyo, Japan), and found the useful ability of the cross-linked chitosan as a packing material for collecting and concentrating trace amounts of metal ions in river-water samples. Furthermore, the determination of six oxoanions in river-water samples (reference materials distributed by the Japan Society for Analytical Chemistry: JAC 0031 and JAC 0032) was carried out using air-segmented flow injection/ICP-MS (AFI/ICP-MS) after preconcentration with a chitosan column. The analytical results obtained for the determination of oxoanions agreed well with other literature values. [15][16][17] Experimental InstrumentationThe ICP-MS system used for the determination of metal ions was a Model SPQ 8000H (Seiko Instrum...

show abstract

“…Such an experiment is a useful method to evaluate the imprinting effect, and has commonly been carried out in studies concerning metal-imprinted resin. [8][9][10][11][12] As can be seen in Table 1, the imprinted microspheres adsorbed the corresponding guest ions more effectively than did the unimprinted ones; the imprinting effect was thus clearly shown. The adsorption percentages at pH 5.6 were larger than those at pH 4.9, suggesting that the carboxyl ANALYTICAL SCIENCE'S OCTOBER 1992, VOL.…”

Section: Resultsmentioning

confidence: 99%

Metal Ion-Imprinted Microspheres Prepared by Reorganization of the Coordinating Groups on the Surface

Tsukagoshi²,

Maeda³

et al. 1992

ANAL. SCI.

View full text Add to dashboard Cite

the Editor Keywords Imprinting polymerization, carboxylated microspheres, seeded emulsion polymerization, metal ion, selective adsorption of copper(II) and nickel (II) adsorption ofThe development of new materials for separation and concentration is a key step for progress in analytical science. A molecular imprinting technique) is one promising way to prepare highly-selective host polymers, since it requires neitherr precise molecular design nor multi-step procedures for host preparation. The imprinting technique is thus a practical method, in contrast with "supramolecular design".2,3 However, it has some fundamental problems: for example, the inapplicability to use a water-soluble substance as a guest and the need to grind and sieve the formed polymer before use. These problems result from the fact that the host preparation was made from solution . or bulk polymerization using an organic solvent or organic monomer, respectively. On the other hand, polymer microsphere and its aqueous dispersion have become of interest as highly-functional materials.4 A microsphere of submicron diameter is characterized by a large surface area, comparable with porous glass beads, and show a high reactivity near the surface.We now propose a new technique in which molecular imprinting is conducted on the microsphere surface; the imprinted microsphere is synthesized by seeded emulsion polymerization in water. Complexation between guest molecule and functional groups on the microsphere surface takes place through the reorganization of the groups while adapting to the imprinted structure. The new technique is, in principle, applicable to water-soluble substances, such as biological components; the polymer beads are well defined and uniform. Grinding and sieving are not necessary. In addition, this technique would improve the complexation behavior (such as capacity, reaction rate, and selectivity) owing to the unique features of sub-micron spheres.In this study, a heavy metal ion was adopted as a guest and a metal ion-imprinted structure was constructed on the carboxylated microsphere surfaces with the aid of the interaction between the metal ion and the carboxyl groups.The adsorption of metal ions onto the microsphere was examined and the imprinting effect was characterized. ExperimentalThe metal ion-imprinted microsphere was prepared according to Scheme 1. Seed emulsion (2) was obtained by the polymerization of styrene (S) (20.55 g), butyl acrylate (BA) (2.71 g), and methacrylic acid (MAA) (1.64 g), in water (75 g) at pH 2.2 (125 mg of K2S208 as initiator, 70° C, 7 h). The polymerization mixture was then brought to room temperature. Divinylbenzene (DVB) (29.86 g), BA (2.9 g), and water (95 g) were added and the emulsion was left at 2° C for 24 h at pH 9.5. The pH of the mixture was then lowered to 5.0, and a portion (8 cm3) of the emulsion was combined with 40 ml of a metal ion solution (0.01 mol dm-3 Cu(II) or Ni(II)) to achieve complexation between the metal ion and the carboxyl group on the surface (4). The DVB-containing emul...

show abstract

Adsorption of Cu2+ or Hg2+ Ion on Resins Prepared by Crosslinking Metal-Complexed Chitosans

Cited by 90 publications

References 7 publications

Adsorption Behavior of Cationic and Anionic Species on Chitosan Resins Possessing Amino Acid Moieties

Adsorption Behavior of Cationic and Anionic Species on Chitosan Resins Possessing Amino Acid Moieties

Adsorption Behavior of Metal Ions on Cross-linked Chitosan and the Determination of Oxoanions after Pretreatment with a Chitosan Column

Metal Ion-Imprinted Microspheres Prepared by Reorganization of the Coordinating Groups on the Surface

Contact Info

Product

Resources

About