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In recent years, as the concepts of "zero waste" and "low carbon" gradually become hot topics, the unparalleled generation of construction and demolition (C&D) waste that poses a significant obstacle to the sustainable development of the built environment has attracted a lot of attention from researchers. Whether the studies on the combination of C&D waste …
1. Introduction. As technology advances in both the electrical and electronics industries, a large amount of electronic waste (e-waste) is generated (Robinson, 2009, Widmer et al., 2005).E-waste contains components that are harmful to humans and affects environmental pollution (Kiddee et al., 2013).Therefore, some countries have established policies and …
A novel integrated circular economy approach in green synthesis of copper oxide nanoparticles from waste printed circuit boards and utilization of its residue for preparation of carbon engulfed nano polymer membrane ... Comprehensive process for the recovery of value and critical materials from electronic waste. J. Clean. Prod., 1 (2016), 10. ...
A novel hybrid Cu–Cl thermochemical cycle is developed and assessed for the co-production of hydrogen and copper using copper waste. An experiment is also conducted to establish the high-temperature electrolytic step as a proof of concept. A detailed parametric study is conducted to assess the effects of such parameters as process step temperature and …
Food waste comprised the fourth largest material category, estimated at 63.1 million tons or 21.6 percent of total generation in 2018. Yard trimmings comprised the next largest material category, estimated at 35.4 million tons, or 12.1 percent of total generation, in 2018. This compares to 35 million tons (16.8 percent of total generation) in 1990.
The useful life of electrical and electronic equipment (EEE) has been shortened as a consequence of the advancement in technology and change in consumer patterns. This has resulted in the generation of large quantities of …
Construction and demolition waste (CDW) accounts for at least 30% of the total solid waste produced around the world. At around 924 million tons in the European Union in 2016 and 2.36 billion tons in China in 2018, the amount is expected to increase over the next few years. Dumping these wastes in sanitary landfills has always been the traditional approach to waste …
The end-of-life electric cables from both domestic and industrial sources offer an attractive resource of copper metal. In addition, copper wastes generated during fabrication of copper components remains another valuable source of recyclable copper. This work reports a simple, cost-effective and eco-friendly direct electrolytic refining using waste electrical copper …
copper waste wire scrap and copper plate rejects for the production of value added high purity copper powder. Keywords: copper electrorefining, scrap recycling, copper powder, anode support system DOI: 10.3103/S106782121604009X 1. INTRODUCTION The copper is oldest metal in use (8700 BC) and, alloyed with tin, it forms the first alloy ever used,
1. Introduction. Whilst the exploitation and development of the mining industry deliver a great stimulus for social and economic progress, there are a large number of mine wastes at the same time [1], [2], [3].From a global perspective, approximately 20–25 billion tons of mining waste are generated from the mining industry annually [4].In mine plants, mine tailings are valueless …
A Review on Recovery of Copper and Cyanide From Waste Cyanide Solutions. Feng Xie Department of Materials Science and Engineering, University of California, Berkeley, California, ... However, when copper minerals are present in the gold ore, high levels of free cyanide must be maintained during leaching because many common copper minerals react ...
Porphyry ores and E-wastes/WEEE are two of the most important copper-bearing materials on the planet. Over 60% of world copper output comes from porphyry copper ores while E-waste(s) is globally ...
The Noranda process is another commercial pyrometallurgical process for the recovery of metals from e-waste. The feed material for this process is composed of e-waste …
Environmental Science, Materials Science. 2020; 22. Save. Physical pre-concentration and ammonium leaching of metal copper from waste printed circuit boards. Shun-xiang Shi Chun-chen Nie Hong-hao Chang Peng Wu Zheng-jie Piao Xiang-nan Zhu. Environmental Science, Materials Science. 2021; 12. Save.
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The remaining rock is stored on site in waste piles. Now, miners aim to use bacteria or other newly developed chemicals to extract even more copper from that waste rock in a secondary leaching ...
A significant amount of e-wastes is generated by small and large electrical and electronic equipment (EEE). Various sources of e-waste generation, composition of different material fractions and metals content of them are shown in Fig. 2 c, d and Table 1 with their average percentages. The maximum amount of e-waste is generated from large …
The new thermoelectric material BiOCuTe exhibits an electrical conductivity of 224 S cm−1 and a Seebeck coefficient of +186 μV K−1 at 373 K, together with an extremely low lattice thermal conductivity of ∼0.5 W m−1 K−1. This results in a ZT of 0.42 at 373 K, which increases to 0.66 at the maximum temperature
Abhijit Nag, Mukesh K. Singh, Carole A. Morrison, and Jason B. Love*. Abstract: The recycling of metals from electronic waste (e-waste) using efficient, selective, and sustainable processes is …
Porphyry ores and E-wastes/WEEE are two of the most important copper-bearing materials on the planet. Over 60% of world copper output comes from porphyry copper ores while E-waste(s) is globally the largest copper-bearing waste category since the 1980s. ... (WEEE)—was selected in this review because (1) it is the largest copper-bearing waste ...
E-waste often contains a wide range of chemicals with varying chemical compositions, including gold (Au), copper (Cu), iron (Fe), and aluminium (Al) and zinc (Zn) [1]. In recent years, the demand for these precious metals as such contained in the e-waste has …
Eand Traction of Li Metal From Spodumene Ore . ... aerospace, polymers and metal additives, Li has been widely used as a cathode material . NASA/ADS; Geochemistry and mineralogy of a spodumenepegmatite lithium ore . Spodumene is currently the main source of lithium (Li), and Li release in mine waters stands out as a common feature of the ...
As presented in Table 1, metals are resources that can have favourable characteristics as inputs in the production chain (base or precious metals) or be hazardous (toxic metals).Some of the elements fall into more than one category, such as lead, zinc and nickel which are both BMs and PTMs. In the case of e-waste, the European RoHS Directive enacts …
Porphyry ores and E-wastes/WEEE are two of the most important copper-bearing materials on the planet. Over 60% of world copper output comes from porphyry copper ores …
WEEE has several valuable materials like metals, but also organics and glass fibers. 2 WEEE mainly contains metals like copper, silver, gold, palladium, iridium, and rare earth materials in much smaller quantities, representing a …
The research team used the TIAM-IFPEN model to assess the cumulative demand for copper by 2050 based on two climate scenarios: a scenario corresponding to an increase in temperature of 4°C (4D scenario) and a more ambitious climate scenario that limits the rise of temperatures to 2°C (2D scenario).
The waste copper slag, a solid by-product formed during the manufacturing of copper from copper concentrates, has been produced on an average of 2.2–3.0 tons from 1 ton of metallic copper production (Ambily et al., 2015). The iron-containing slags are relatively low reactive and can be utilized only as an inert material or otherwise several ...
The results revealed that user scrap exhibited the highest copper content of 34.5 wt%, while a reduction in metallic content was observed with particle size reduction in the majority of the analyzed e-waste materials [32]. In another study, the study successfully recovered copper from e-waste leaching solution using LIX984 N extractant with ...
Copper mining produces significant amounts of copper mine tailings (CMT), necessitating appropriate waste handling and disposal practices. By substituting a portion of cement with CMT as supplementary cementitious materials (SCMs), we aim to address two environmental issues simultaneously: reducing copper mine waste in landfills and decreasing …
Moreover, some developed countries like the USA, along with others, export the majority of their e-waste produced to developing nations like China, India, Pakistan and Nigeria. 7 The USA is the main world's exporter with 7.1 million …
