Evaluating the optimal digestion method and value distribution of precious metals from different waste printed circuit boards

An automated assessment method for integrated circuit chip detachment from printed circuit board by multistep binarization and template matching of X-ray transmission images

“…PCB consists not only of metals but of various other materials such as glass, resin, and paper; and various types of PCB recycling methodology, targeting different materials, have been proposed. Recent studies have, for example, employed hydrometallurgy [7,8], leaching and digestion [9][10][11], flotation [12,13], super-gravity separation [14], corona electrostatic separation [15], catalytic pyrolysis [16], and supercritical methanol [17].…”

Status of Recovery of Strategic Metals from Spent Secondary Products

“…They adopted the optimal digestion method using aqua regia, hydrogen peroxide, hydrofluoric acid, and boric acid. The results showed the recovery value of precious metals with gold and palladium accounting for the highest recovery among other precious metals [87]. Thiosulphate has been explored due to highly toxic cyanide salts which pose detrimental effects.…”

A pathway to involve consumers for exchanging electronic waste: a deep learning integration of structural equation modelling and artificial neural network

“…Comparatively, the electronic waste or e-waste and its subsequent management is more noxious and dangerous because of the emission of methane and hence needs to managed with due diligence [7]. This is because of the substance in e-wastes not only include plastic but also include chromium, lead, mercury and arsenic and hence require state-of-the-art infrastructure for further processing it without directly dumping it in landfills to dilute its impact on the environment [8,9]. Thus improper waste management will further devastate the habitat and ecology [8].…”

“…This is because of the substance in e-wastes not only include plastic but also include chromium, lead, mercury and arsenic and hence require state-of-the-art infrastructure for further processing it without directly dumping it in landfills to dilute its impact on the environment [8,9]. Thus improper waste management will further devastate the habitat and ecology [8].…”