|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Extraction of the Surface-coated Metals from Waste Acrylonitrile Butadiene Styrene Plastics in an Ammoniacal Solution
||Minji Jun, Tae Gyun Kim, Jae-chun Lee, Rajiv R. Srivastava, Min-seuk Kim
|On-Site Speaker (Planned)
Leaching of the surface-coated metals from waste acrylonitrile butadiene styrene plastics (WABSP) has been investigated in the ammoniacal solution. The leaching of the WABSP sample (typically containing metals such as 4.1 wt.% Cu, 1.3 wt.% Ni, 0.03 wt.% Cr) efficiently dissolved copper and nickel, leaving unleached chromium as the fine particles. The results indicate that the anions of different buffer media for metal leaching follow the order: CO32− > Cl− > SO42−. A declined leaching with the high NH4OH–(NH4)2CO3 ratio (8:1) and a steep rise in extraction at the higher pulp density in solution revealed the influence of anion (CO32−) and cation (Cu2+) present in the system. The leaching performed in carbonate solution by maintaining the total NH3 concentration of 5.0 M at a ratio, of 4:1 for NH4OH–(NH4)2CO3, 200 g/L pulp density, 20 °C temperature and 400 rpm agitation speed in 120 min, yielded the maximum extraction (>99%) of copper and nickel. The study reveals a plausible recovery of the surface-coated metals from the WABSP without altering the properties of polymer material that can be recycled separately.
||Planned: At-meeting proceedings