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Item type:Publication, Access status: without files , Recent advances on hydrometallurgical recovery of critical and precious elements from end of life electronic wastes - a review(2019-02-01); ; ; ; Waste electrical and electronic equipment (WEEE) contains economically significant levels of precious, critical metals and rare earth elements, apart from base metals and other toxic compounds. Recycling and recovery of critical elements from WEEEs using a cost-effective technology are now one of the top priorities in metallurgy due to the rapid depletion of their natural resources. More than 150 publications on WEEE management, leaching and recovery of metals from WEEE were reviewed in this work, with special emphasize on the recent research (2015–2018). This paper summarizes the recent progress regarding various hydrometallurgical processes for the leaching of critical elements from WEEEs. Various methodologies and techniques for critical elements selective recovery (using ionic liquids, solvent extraction, electrowinning, adsorption, and precipitation) from the WEEEs leachates are discussed. Future prospects regarding the use of WEEEs as secondary resources for critical raw materials and its techno-economical and commercial beneficiaries are discussed. AbbreviationsE-Waste Electronic wasteWEEE Waste electrical and electronic equipmentCRM Critical raw materialsPCB Printed circuit boardLCD Liquid crystal displayCRT Cathode ray tubeFl. Lamp Fluorescent lampHDD Hard disk drivesLED Light emitting diodeEU European UnionUNEP United Nations Environmental ProgramREE Rare earth elementITO Indium-tin oxidePM Precious metalNiMH battery Nickel-hydride batteryCPU Central processing unitRAM Random access memoryLiBs Li-ion batteriesSFL Spent fluorescent lamps. © 2019, © 2019 The Author(s). Published with license by Taylor & Francis Group, LLC.Publicationtype: Journal Article174 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Biotechnological strategies for the recovery of valuable and critical raw materials from waste electrical and electronic equipment (WEEE) - A review(2019-01-15); ; ; ; Critical raw materials (CRMs) are essential in the development of novel high-tech applications. They are essential in sustainable materials and green technologies, including renewable energy, emissionfree electric vehicles and energy-efficient lighting. However, the sustainable supply of CRMs is a major concern. Recycling end-of-life devices is an integral element of the CRMs supply policy of many countries. Waste electrical and electronic equipment (WEEE) is an important secondary source of CRMs. Currently, pyrometallurgical processes are used to recycle metals from WEEE. These processes are deemed imperfect, energy-intensive and non-selective towards CRMs. Biotechnologies are a promising alternative to the current industrial best available technologies (BAT). In this review, we present the current frontiers in CRMs recovery from WEEE using biotechnology, the biochemical fundamentals of these bio-based technologies and discuss recent research and development (R&D) activities. These technologies encompass biologically induced leaching (bioleaching) from various matrices,biomass-induced sorption (biosorption), and bioelectrochemical systems (BES).Publicationtype: Journal ArticleScopus© Citations 217 398 847 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , WEEE management in a circular economy perspective: an overviewThe circular economy approach represents a strategy to optimize product lifecycles, thus improving the sustainability of consumption patterns. In the European Union a recent legislative proposal has addressed this concept by promoting waste prevention and re-use as well as extensive recovery of materials. Such approach is particularly interesting for the management of Waste Electrical and Electronic Equipment (WEEE), that is regarded as an urban stock of different metals, and in particular of both precious metals and rare earth elements. The recovery of metals is the main focus of WEEE management strategies and, more recently, it has been receiving a great deal of attention, especially due to the continuously increasing production of this waste stream. However, great room for improvements can still be recognised to ensure the overall sustainability of WEEE management. The present work discusses both the current needs and the main challenges regarding WEEE management in a circular economy perspective. To this end, WEEE generation trend and composition is provided and the legislative framework for its handling is overviewed, in order to point out future perspectives to develop a more sustainable management approach of this waste.Publicationtype: Journal Article182