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202288 · In this work, a cylindrical-expanded aluminum sheet placed in an agitated vessel was used to recover copper ions from synthetic wastewater. The influence of initial Cu2+ ion concentration, rotating speed, solution pH, aluminum mesh number, temperature, and the presence of different types of surfactants on the kinetics of the Cu+2 ions ...
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2014530 · The combined chemical-electrochemical process was scaled up (Table 7) in order to separate a gold rich solid residue, with the simultaneous recovery of copper, from the entire WPCB. The experiment was performed at 0.37 M initial FeCl 3 concentration and a current density of 4 mA/cm 2 , which were identified as the optimal values of the ...
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2023424 · Figure 1. Schematic of the multi-step process for metal recovery from PCBs: (1) Preparation of the leaching agent in presence of the biomass; (2) Biomass separation; (3) Cu extraction from e-waste pre-processed by the leaching process; and, (4) metal recovery from the liquid solution.
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20221015 · Recycling copper (Cu 0) from waste printed circuit boards (PCBs) is a prevalent challenge.Here, we propose a new pathway and reveal mechanisms for recovering Cu 0 from waste PCBs via a mechanochemical approach. The successful application of mechanical force avoids using inorganic acid in the Cu 0 recovery process. Our work …
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2018620 · 1. Introduction. Copper anode slime is the byproduct of electro-refining of copper, which often contains precious metals and is a valuable secondary resource for recovering valuable products, such as silver, from it (Ding et al., 2017, Wang et al., 2017, Yldrm et al., 2014).The predominant method for silver recovery from anode slime is …
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2022227 · Materials entering the reactor are immersing in a molten metal bath (1250 °C), which is churned by a mixture of supercharged air (up to 39% oxygen) is known as smelting process (Ma, 2019). In Cu recovery from e-waste, by this process some precious metals with Cu and iron sulfide formed liquid matte whereas other metal sulfides oxidized …
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2023215 · The leachate used for electrowinning was obtained by supercritical leaching in the conditions of higher percentage of copper extraction: 1:20 solid/liquid ratio; H 2 SO 4 (2.5 M) + 20% H 2 O 2 ... M.M.; Veglio, F. Process development for recovery of copper and precious metals from waste printed circuit boards with emphasize on …
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More than 10 tons of electronic-grade copper anodes have been put back into use for the semiconductor manufacturing process in 2020. In general, the copper liquid waste recycling creates an annual benefit of over NT$100 million (estimated US$3.4 million) from …
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202081 · An integrated process to recover copper from low-grade copper grade sulfide ore and acid wastewater (AMD) has been developed and applied. The process includes the operations of milling-flotation, heap bioleaching, SX-EW and copper sulfide precipitation. In the process, copper and valuable metals are efficiently recovered.
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201561 · The present study aimed at developing an original and environmentally friendly process for the recovery of copper from waste printed circuit boards (WPCBs) by chemical dissolution with Fe 3+ combined with the simultaneous electrowinning of copper and oxidant regeneration. The recovery of copper was achieved in an original set-up …
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