Adsorption of silver on dithiocarbamate type of chemically modified chitosan

被引：18

作者：

Asakawa, T ^{[1
]}

Inoue, K

Tanaka, T

机构：

[1] Tanaka Kikinzoku Kogyo KK, Hiratsuka, Kanagawa 2540076, Japan

[2] Saga Univ, Dept Appl Chem, Saga 8408502, Japan

来源：

KAGAKU KOGAKU RONBUNSHU | 2000年 / 26卷 / 03期

关键词：

silver; adsorption; dithiocarbamate type; chemical modified chitosan;

D O I：

10.1252/kakoronbunshu.26.321

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dithiocarbamate (DTC) -type chemically modified chitosan was synthesized by incorporating functional groups of dithiocarbamate onto polymer matrices of chitosan, and the adsorptive separation characteristics of precious metals were investigated, among which silver in particular was examined in detail. DTC-chitosan is found to exhibit high selectivity not only towards silver but also towards gold and palladium. The adsorptive separation characteristics of DTC-chitosan are superior to raw material chitosan and commercial chelating resin containing the same functional group(DTC), which is considered to be attributable to synergistic effects by a combination of dithiocarbamate group and polymer matrices of chitosan. Furthermore, adsorptive recovery of silver from waste cynaide and noncyanide solution for silver plating is found to be achievable. The maximum adsorption capacity of DTC-chitosan for silver is 3.6 mol./kg. From the above-mentioned results, it is concluded that DTC-chitosan is a practical candidate for an adsorbent.

引用

页码：321 / 326

页数：6

共 11 条

[1]

Asakawa T., 1999, J SURFACE FINISHING, V50, P68

[2]

BABA Y, 1997, J ION EXCHANGE, V8, P227

[3]

ERICK H, 1982, STABILITY CONSTANTS, P81

[4]

GEORGE ZP, 1988, WATER RES, V22, P327

[5] ADSORPTION OF METAL-IONS ON CHITOSAN AND CROSS-LINKED COPPER(II)-COMPLEXED CHITOSAN [J].

INOUE, K ;

BABA, Y ;

YOSHIZUKA, K .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1993, 66 (10) :2915-2921

[6]

INOUE K, 1998, J ION EXCH, V9, P115

[7]

INOUE K, 1997, J ION EXCHANGE, V8, P180

[8]

INOUE K, 1997, J ION EXCHANGE, V8, P115

[9]

LARS GS, 1971, STABILITY CONSTANT S, V1, P84

[10]

MATSUNAGA H, 1986, CHEM SOC JAPAN, V7, P859

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