N-aminoguanidine modified persimmon tannin: A new sustainable material for selective adsorption, preconcentration and recovery of precious metals from acidic chloride solution

被引：77

作者：

Gurung, Manju ^{[1
]}

Adhikari, Birendra Babu ^{[2
]}

Morisada, Shintaro ^{[1
]}

Kawakita, Hidetaka ^{[1
]}

Ohto, Keisuke ^{[1
]}

Inoue, Katsutoshi ^{[1
]}

Alam, Shafiq ^{[2
]}

机构：

[1] Saga Univ, Fac Sci & Engn, Dept Chem & Appl Chem, Saga 8408502, Japan

[2] Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF A1B 3X5, Canada

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 129卷

关键词：

Persimmon tannin; Aminoguanidine; Precious metals; Adsorption; Leach liquor of e-wastes; PALLADIUM(II) COMPLEXES; HEXAVALENT CHROMIUM; GOLD; BIOSORPTION; ADSORBENT; GOLD(III); GEL; PLATINUM(IV); MECHANISMS; EXTRACTION;

D O I：

10.1016/j.biortech.2012.11.012

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A new adsorption gel has been developed by immobilizing N-aminoguanidine (AG), a chelating ligand, on persimmon tannin extract through consecutive reactions. Adsorption behavior of the gel was investigated for the adsorptive separation and recovery of precious metal ions from varying concentration of HCl medium. The adsorption isotherms of precious metal ions on the gel were described by the typical monolayer type of Langmuir model and the maximum adsorption capacities were evaluated as 8.90 mol kg(-1) for Au(III), 2.01 mol kg(-1) for Pd(II) and 1.01 mol kg(-1) for Pt(IV). Real time applicability of the gel was examined for the recovery of precious metals from actual leach liquor of e-waste leached with chlorine containing hydrochloric acid. The gel was found to be highly efficient and selective for the uptake of targeted metal ions in the presence of excess base metal ions and also exhibited superior selectivity over commercially available anion exchange resins. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：108 / 117

页数：10

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