Jul 01 2017 · The printed circuit board represents the most valuable part of e-waste accounting for over 40 of the total e-waste metal value (Golev et al. 2016). BullionStreet (2012) summarized that 320 t of gold and 7500 t of silver is consumed by the electronic industry every year and urban mining of e-waste could generate 21 billion each year.
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· Since they were introduced in the 1990s, lithium-ion batteries (LIBs) have been used extensively in cell phones, laptops, cameras, and other electronic devices owing to its high energy density, low self-discharge, long storage life, and safe handling (Gu et al., 2017 Winslow et al., 2018).Especially in recent years, as shown in Fig. 1 (), with the vigorous promotion and use of new
· Process development for recovery of copper and precious metals from waste printed circuit board with emphasize on palladium and gold leaching and precipitation Waste Manag. ,
· Electronic waste, or e-waste, is an emerging problem with developed nations as with developing nations. In the absence of proper collection and disposal systems, awareness, and proper regulations, the problem is rather more acute in developing nations. These wastes are environmentally hazardous on one hand and valuable on the other. They contain substantial amount of metal value,
· The Cleantech Materials Campus will be the location of expanded GOLD'n GRO fertilizer production and Printed Circuit Board Assembly refining which are integral to Itronics growth. Itronics controls a tailings pile that is a suitable candidate for use to demonstrate the Rock Kleen Technology on a continuous operating basis.
· Table 1 Amount of waste from multilayer printed circuit board manufacturing process item Waste Characterization in Taiwan kg/m2 of PCB 1 Waste board 2Hazardous 0.01~0.3kg/m 2 Edge trim Hazardous 0.1~1.0kg/m2 3 Hole drilling dust Hazardous 0.005~0.2kg/m2 4 Copper powder Non-hazardous 0.001~0.01kg/m2
The recovery of base and precious metals from e-waste can be classified into three types hydrometallurgical (chemical), pyrometallurgical (thermal) and biometallurgical (biological) (Hong and Valix, 2014, Tuncuk et al., 2012) ().Physical methods have gained popularity in e-waste recycling as a pre-treatment strategy.
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Circuit boards should be rigorously compatible with, a PCB layout created by the designer using PCB design software.Commonly-used PCB design software includes Altium Designer, OrCAD, Pads, KiCad, Eagle etc. NOTE Before PCB fabrication, designers should inform their contract manufacturer about the PCB design software version used to design the circuit since it helps avoid issues caused by
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· A.4, and the final gold recovery rates are shown in Fig. 4. As leaching of copper as aforementioned, there was only a little gold recovered without the pyrolysis pretreatment of waste PCBs. The final gold recovery rates were approximately 69 and 80%, when the waste PCBs were pretreated by conventional and microwave pyrolysis, respectively.
· Electronic waste is mainly derived from a variety of circuit board waste. Engineering plastics are the main component of the electronic waste, which contains large amounts of heavy metals, such as cadmium, chromium, mercury, lead, copper, and flame retardants. A general disposal method of electronic waste is mechanical disassembly.
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· Computers and other electronic devices contain gold and other precious metals in their circuit boards. As consumers upgrade their electronic gadgets, the precious metals remain trapped in piles of waste. There’s about 0.2 grams (0.007 ounces) of gold in a typical mobile phone handset. Recovery of this gold requires
· Electronic waste is mainly derived from a variety of circuit board waste. Engineering plastics are the main component of the electronic waste, which contains large amounts of heavy metals, such as cadmium, chromium, mercury, lead, copper, and flame retardants. A general disposal method of electronic waste is mechanical disassembly.
· Sheel A, Pant D (2018) Recovery of gold from electronic waste using chemical assisted microbial biosorption (hybrid) technique. Bioresour Technol 247 1189–1192. Article CAS Google Scholar Sheng PP, Etsell TH (2007) Recovery of gold from computer circuit board scrap using aqua regia. Waste Manag Resourc 25 380–383
· Process development for recovery of copper and precious metals from waste printed circuit board with emphasize on palladium and gold leaching and precipitation Waste Manag. ,
· Abstract. Due to the supply gap towards increasing demand as well as loss of precious metals by illegal recycling, present research reports application-oriented processes developed at CSIR-NML, India to recover precious metals from small components of e-waste containing ~0.1–0.8% Ag, ~0.03–0.9% Au, ~0.01–0.02% Pd, ~0.0003–0.0005% Pt, and related effluent.
· Electronic waste is mainly derived from a variety of circuit board waste. Engineering plastics are the main component of the electronic waste, which contains large amounts of heavy metals, such as cadmium, chromium, mercury, lead, copper, and flame retardants. A general disposal method of electronic waste is mechanical disassembly.
The recovery of palladium, copper, silver, and gold from printed circuit boards in cell phones was investigated by Quinet et al. (2005). Removal efficiencies of these metals using the anionic
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The printed circuit board (PCB) is a valuable part of any electronic device and is an attractive secondary resource due to its inherently high concentration of base, precious, and critical metals
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· Introduction to Electronics (E-Waste) Recycling. Electronics waste, commonly known as e-scrap or e-waste, is the trash we generate from surplus, broken, and obsolete electronic devices. Electronics contains various toxic and hazardous chemicals and materials that are released into the environment if we do not dispose of them properly.
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· In the present study, a model of closed-loop recycling of copper from PCBs is demonstrated, which involves the sequential application of bioleaching and electrowinning to selectively extract copper. This approach is proposed as part of the solution to resolve the challenging ever-increasing accumulation of electronic waste, e-waste, in the environment.
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