A new two-roll electrostatic separator for recycling of metals and nonmetals from waste printed circuit board

Separation of WPCBs by dissolution of brominated epoxy resins using DMSO and NMP: A comparative study

“…0.10 g pure bisphenol A was transferred to a 100 ml volumetric flask dissolved and make up to volume with anhydrous ethanol to get stock solution of 1000 lg/ml. Concentration of 5,10,15,20,25,30,35,40,45 and 50 lg/mL were prepared for making a standard curve (Fig. S1).…”

“…PCB recycling involves two steps; (1) Mechanical-physical or metallurgical processing for dismantling and/or separation of different components and materials [7][8][9][10], (2) further separation and processing of metal streams; which probably is the most imperative step from economic and environmental viewpoint. Meanwhile, many studies, such as bio-metallurgy [11], combustion [12], hydrometallurgy [13], pyro-metallurgy [14], pyrolysis [15], supercritical fluid [16], and ionic liquid [17] were carried out for recycling of WPCBs.…”

Recovery of Lead and Noble Metals After Processing Printed Circuit Boards From Cell Phones by Leaching With Mixtures Containing Hydrogen Fluoride

“…In general, a well-designed recycling line must be equipped with dusting system and waste gases disposal system. 5 Increasing attention on precious metals recovery such as gold, silver and platinum from waste PCBs (WPCBs) has boosted the development of new processes including physical [18][19][20] and thermochemical techniques. 12,18,19,21 Hydrometallurgical methods are one of the key technologies in metal recycling because they enable a fine separation between chemically-similar metals in small-scale operation.…”

“…5 Increasing attention on precious metals recovery such as gold, silver and platinum from waste PCBs (WPCBs) has boosted the development of new processes including physical [18][19][20] and thermochemical techniques. 12,18,19,21 Hydrometallurgical methods are one of the key technologies in metal recycling because they enable a fine separation between chemically-similar metals in small-scale operation. 1,[22][23][24][25][26] The base metals recovery has a substantial impact on the economics of the process due to larger available amount in WPCBs.…”

Recycling of non-metallic fractions from waste printed circuit boards: A review

“…Mechanical processing for the separating the MFs and the NMFs from waste PCBs includes shape separation, magnetic separation, electric conductivity-based separation, density-based separation and corona electrostatic separation, all of which have been well reviewed by Cui [11] and Huang et al [12]. Corona electrostatic separation (CES) for the MFs and the NMFs from waste PCBs has been intensively studied by Xu and his colleagues from Shanghai Jiao Tong University in China [13][14][15][16][17][18][19][20][21][22][23][24] and has been proved to be a highly efficient and environmental friendly process. Chemical recycling methods of the NMFs are adopted during and after the stage of the chemical separating process for the MFs and NMFs in chemical recycling methods for waste PCBs.…”