Enhanced Recovery of Au(III) under Neutral pH Conditions Using Polysulfide-Porphyrin Polymers
Source abstract
Abstract
Adsorbents capable of high extraction of gold from complex sources, especially electronic waste (EW) and seawater, are needed for gold resource sustainability and effective recycling. Herein, polysulfide-porphyrin polymers (S-PPors) that can effectively extract gold from complex matrices have been successfully developed. Among them, S-PPor-1 exhibited an adsorption rate of 97.59% at pH = 6.0. The adsorption capacity of S-PPor-1 for Au(III) reached 833.33 and 2000.00 mg/g, respectively, at 25 and 55 °C under the environment of pH = 6, which was more suitable for the adsorption of Au(III) under neutral conditions. The optimum adsorption effect occurs at 55 °C and pH 6. The high adsorption rate mainly depends on the complexation and oxidation–reduction. When 10 mL of eluent was selected, the adsorption rate of S-PPor-1 remained above 85% after seven cycles. Finally, S-PPor-1 selectively and efficiently extracted Au(III) from high-salt solutions as well as EW leaching solutions, showing great potential for the recovery of gold from these substrates.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Recycling and Waste Management Techniques · Extraction and Separation Processes · Advancements in Battery Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Pharmacy and Pharmaceutical Sciences & Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, NHC Key Laboratory of Biotechnology Drugs (Shandong Academy of Medical Sciences), Key Lab for Rare & Uncommon Discases of Shandong Province, Jinan, Shandong 250117, China
Funding
Shandong First Medical University · National Natural Science Foundation of China
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