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
文献类型： 外文期刊
作者： Fan, Ruiyi 1 ; Xie, Feng 1 ; Guan, Xueliang 1 ; Zhang, Qinglin 1 ; Luo, Zhengrong 1 ;
作者机构： 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
关键词： Selective recovery;e-waste;Persimmon tannin;Gold;Industrial application
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）
ISSN：
年卷期：
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收录情况： SCI
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 HCl and HNO_3 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.
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