Journal
BIORESOURCE TECHNOLOGY
Volume 163, Issue -, Pages 167-171Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.03.164
Keywords
Selective recovery; e-waste; Persimmon tannin; Gold; Industrial application
Funding
- Special Fund for Agro-scientific Research in the Public Interest [201203047]
- TES-AMM Co. Ltd., Shanghai, China
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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.
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