Banana Peel Carbon that Containing Functional Groups Applied to the Selective Adsorption of Au(III) from Waste Printed Circuit Boards — Oak Academic Publishing
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Banana Peel Carbon that Containing Functional Groups Applied to the Selective Adsorption of Au(III) from Waste Printed Circuit Boards
Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, China;State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou, China.
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Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, China
1 Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, China;State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou, China.
2 Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, China
This paper reports a kind of banana peel carbon (BPC) containing -OH, -NH 2 functional groups which prepared through controlling carbonization temperature and its application on the selective adsorption of gold from waste printed circuit boards (PCBs). The adsorption of BPC for Au(III) reached equilibrium in 30 min and the adsorption of Au(III) was favorable at pH 2.5. Meanwhile, the adsorption isotherm showed the maximum adsorption capacity of 801.7 mg/g for Au(III). The results displayed that BPC had a strong selectivity for Au(III) and a negligible affinity to base metal ions, such as Cu( II ), Ni( II ), Fe(III) and Pb( II ). The BPC adsorbent, which absorbed gold, can be recovered completely by HCl- thiourea solution.
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