Selective adsorption and recovery of Au(III) from three kinds of acidic systems by persimmon residual based bio-sorbent: A method for gold recycling from e-wastes

被引：90

作者：

Fan, Ruiyi ^{[1
]}

Xie, Feng ^{[1
,2
]}

Guan, Xueliang ^{[1
]}

Zhang, Qinglin ^{[1
]}

Luo, Zhengrong ^{[1
]}

机构：

[1] Huazhong Agr Univ, Key Lab Hort Plant Biol MOE, Wuhan 430070, Peoples R China

[2] Jiangxi Acad Agr Sci, Inst Hort Sci, Nanchang 330200, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 163卷

关键词：

Selective recovery; e-waste; Persimmon tannin; Gold; Industrial application; TANNIN GEL; PRECIOUS METALS; HYDROCHLORIC-ACID; ELIMINATION; MECHANISM; ADSORBENT; MERCURY; CARBON; IONS;

D O I：

10.1016/j.biortech.2014.03.164

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A low cost bio-sorbent, named "PPF resin", was prepared by crosslinking the persimmon residual with formaldehyde. The adsorption behavior of PPF resin towards Au(III) from varied HCI and HNO3 concentration solutions was studied. PPF resin could adsorb almost complete Au(III) from high acidic systems. The influence of dilution ratio, solid-liquid ratio and time towards Au(III) from aqua regia leached PCBs liquor was censored in detail by batch and continuous adsorption methods. The PPF resin before and after adsorption was characterized by FT-IR, XRD and XPS spectra which provided evidences for the reduction of Au(III) to Au(0) with a proposed mechanism of Au(III) adsorption-reduction process. After saturated column adsorption of 0.1 g PPF resin, 0.0506 g gold (purity: 99.9%) was obtained by the method of incineration. The present results provide a new approach for gold recovery from the secondary resources. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：167 / 171

页数：5

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