Download or read book Metal Recovery from Electronic Waste Biological Versus Chemical Leaching for Recovery of Copper and Gold written by Arda Işildar and published by CRC Press. This book was released on 2018-10-30 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waste electrical and electronic equipment (WEEE) generation is a global problem. Despite the growing awareness and deterring legislation, most of the WEEE is disposed improperly, i.e. landfilled or otherwise shipped overseas, and treated in sub-standard conditions. Informal recycling of WEEE has catastrophic effects on humans and the environment. WEEE contains considerable quantities of valuable metals such as base metals, precious metals and rare earth elements (REE). Metal recovery from WEEE is conventionally carried out by pyrometallurgical and hydrometallurgical methods. In this PhD research, novel metal recovery technologies from WEEE are investigated. Using acidophilic and cyanide-generating bacteria, copper and gold were removed from crushed electronic waste with removal efficiencies of 98.4 and 44.0%, respectively. The leached metals in solution were recovered using sulfidic precipitation and electrowinning separation techniques. Finally, a techno-economic assessment of the technology was studied. This research addresses the knowledge gap on two metal extraction approaches, namely chemical and biological, from a secondary source of metals. The essential parameters of the selective metal recovery processes, scale-up potential, techno-economic and sustainability assessment have been studied.
Download or read book Biological Versus Chemical Leaching of Electronic Waste for Copper and Gold Recovery written by Arda Isildar and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The well-being of the society depends on a number of metals, including base metals, precious metals and increasingly rare earth elements (REE). The usage of these metals increased in numerous applications, including electrical and electronic equipment (EEE), and their interrupted supply is at stake. There is an increasing interest in the secondary sources of these metals, particularly waste electrical and electronic equipment (WEEE) in order to compensate their potential supply deficit. This PhD thesis demonstrates the advantages and bottlenecks of biological and chemical approaches, as well as the advances and perspectives in the development of sustainable processes for metal recovery from WEEE. Furthermore, a novel process for the recovery of metals from WEEE is described, and a techno-economic assessment is given. Discarded printed circuit boards (PCB) from personal computers (PC), laptops, mobile phones and telecom servers were studied. Following an extensive literature review, a novel characterization and total metal assay method is introduced and applied to waste board materials. Discarded PCB contained metals in the range of (%, by weight): copper (Cu) 17.6 - 39.0, iron (Fe) 0.7 - 7.5, aluminum (Al) 1.0 - 5.5, nickel (Ni) 0.2 - 1.1, zinc (Zn) 0.3 - 1.2, as well as gold (Au) (in ppm) 21 - 320. In addition, multi-criteria analysis (MCA) using the analytical hierarchical process (AHP) methodology is applied for selection of the best-suited technology. A proof-of-concept for a two-step bioleaching extraction was given, in which 98.4% and 44.0% of the Cu and Au, respectively, were extracted. The two-step extraction concept was applied to the chemical leaching of metals from PCB. Cu leaching was carried in an acidic oxidative mixture of H2SO4 and H2O2, whereas Au leaching for carried out by S_2 O_3^(2-) in a NH_4^+ medium, catalyzed by CuSO4. Under the optimized parameters, 99.2% and 96.6% of Cu and Au, respectively, were extracted from the board material. Selective recovery of Cu from the bioleaching leachate using sulfidic precipitation and electrowinning was studied. Cu was selectively recovered on the cathode electrode at a 50 mA current density in 50 minutes, with a 97.8% efficiency and 65.0% purity. The techno-economic analysis and environmental sustainability assessment of the new technology at an early stage of development was investigated.
Download or read book The Recovery Of Gold From Secondary Sources written by Syed Sabir and published by World Scientific. This book was released on 2016-06-29 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: New discoveries of the properties of gold at a nanoscale, and its effective use in modern technologies, have been driving a virtual 'gold rush'. Depleting natural resources has meant that the recovery of gold continues to grow in importance and relevance.The Recovery of Gold from Secondary Sources analyses the most advanced technology in gold recovery and recycling from spent sources of mobile phones, unwanted electronic equipment and waste materials. State-of-the-art techniques of hydrometallurgical and bio-metallurgical processing, leaching, cementing, adsorbing and separation through bio-sorbents are all described in detail, providing a guide for students and researchers. Discussion of environmentally friendly methods of recovery are presented, in order to provide modern-day alternatives to previous techniques. For those interested in the study of gold recovery this book gives a comprehensive overview of current recovery, making it the ultimate source of information for students, researchers, chemists, metallurgists, environmental scientists and electronic waste recovery experts.
Download or read book Electronic Waste Management written by Sunil Kumar and published by John Wiley & Sons. This book was released on 2024-01-24 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: ELECTRONIC WASTE MANAGEMENT Current knowledge on electronic waste management strategies, along with future challenges and solutions, supported by case studies Electronic Waste Management maps out numerous aspects of health and environmental impacts associated with electronic waste, thoroughly detailing what we can expect in terms of the use of electronic products and the management of electronic waste in the future. The book assists readers in grasping the fundamentals of the entire e-waste system by covering various factors related to the health and environmental impacts of electronic waste, as well as a perspective on the subject based on current global recycling strategies. Presented in a straightforward and scientific manner, the book also covers many electronic waste management process technologies. By inviting together, a diverse group of experts, including researchers, policymakers, and industry professionals who generously shared their knowledge and experiences in the field to tackling this global issue, Electronic Waste Management enables readers to foster a deeper understanding of the complex issues surrounding electronic waste and to explore innovative solutions that can help mitigate its adverse effects on the environment and health of human and animals. Sample topics covered in Electronic Waste Management include: Global electronic waste management strategies and different global waste models, including their social, ecological, and economical aspects Economic impacts of e-waste, including cleanup costs and global loss of valuable resources like metals and plastics Value creation from electronic waste (closing the loop) and future prospects in sustainable development Negative impacts of e-waste, including environmental pollution and human health risks, such as when harmful chemicals leach into water sources Electronic Waste Management serves as a highly valuable resource for anyone involved in the global e-waste arena, including producers, users, recyclers, policymakers, academics, researchers, and health workers, by increasing knowledge and awareness surrounding health and environmental impacts that electronic waste poses.
Download or read book Recovery of Precious Metals from Electronic Scrap written by Raymond O. Dannenberg and published by . This book was released on 1972 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrometallurgy written by Michael Free and published by John Wiley & Sons. This book was released on 2013-10-07 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book provides a college-level overview of chemical processing of metals in water-based solutions, in the field that is known as hydrometallurgy"--
Download or read book Biohydrometallurgical Recycling of Metals from Industrial Wastes written by Hong Hocheng and published by CRC Press. This book was released on 2017-09-11 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although many available metal recycling methods are simple and fast, they are also expensive and cause environmental pollution. Biohydrometallurgical processing of metals offers an alternative to overcome these issues, as the use of biological means not only helps to conserve dwindling ore resources but also fulfills the need for the unambiguous need to extract metals in nonpolluting, low-energy, and low-cost way. This book covers biohydrometallurgy and its application in the recovery of metals from secondary sources like wastes. It aims to provide readers with a comprehensive overview of different wastes for metal recovery and biological treatment methods that are both environmentally friendly and economically viable.
Download or read book Principles of Extractive Metallurgy written by Fathi Habashi and published by . This book was released on 1986 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery of Copper and Associated Precious Metals from Electronic Scrap written by H. B. Salisbury and published by . This book was released on 1981 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold written by Nathaniel Arbiter and published by CRC Press. This book was released on 1990 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eight articles first appeared as volume 6 (no date) of Mineral processing and extractive metallurgy review. They review new methods of recovery for gold, and to some extent, silver, focus on the particular challenges of extraction from carbonaceous ores and from various sulfide-bearing ore, and the treatment of refractory gold ore, and discuss high-temperature and biological oxidation, high- temperature chlorination, and removing metals from leach liquor. Book club price, $40. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book Waste Bioremediation written by Sunita J. Varjani and published by Springer. This book was released on 2017-12-01 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the bioremediation of both solid and liquid waste, including regional solutions for India as well as globally relevant applications. The topics covered include pollutant reduction through composting, solutions for petroleum refinery waste, use of microorganisms in the bioremediation of industrial waste and toxicity reduction, microbial fuel cells, and microbial depolymerisation. The book also explores the biosorption of metals and the bioremediation of leachates, especially with regard to soil and groundwater remediation. It is a valuable resource for researchers, professionals, and policy makers alike.
Download or read book Hydrometallurgy 94 written by Institution of Mining & Metallurgy and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrometallurgy '94 contains the 78 papers that were presented at the international symposium organized by the Institution of Mining and Metallurgy and the Society of Chemical Industry and held in Cambridge, England, in July 1994. In the papers specific attention is paid to the concept of sustainable development and the associated ideas of cleaner technology, recycling and waste minimization that have particular relevance to the extractiona nd processing of metals and other mineral products. The papers, by authors from 30 contries, are grouped under the headings: Hydrometallurgy and Sustainable Development; Materials Production and the Environment; Fundamentals; Leaching; Bioprocessing; Gold Solution Purification; Effluent Treatment; Processes; and Recycling.
Download or read book Emerging Innovative Trends in the Application of Biological Processes for Industrial Wastewater Treatment written by Maulin P. Shah and published by Elsevier. This book was released on 2024-05-24 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging Innovative Trends in the Application of Biological Processes for Industrial Wastewater Treatment discusses new and emerging innovative trends in the application of biological processes in industrial wastewater treatment. It also includes the fate of chemicals produced after the treatment process both at the laboratory scale and at the industrial scale. This book explores the unique biological aspects of the wastewater treatment process and highlights the advantages they provide for engineering applications in the industries. Each chapter covers a different biological-based approach and examines the basic principles, practical applications, recent breakthroughs, and associated limitations. Emerging Innovative Trends in the Application of Biological Processes for Industrial Wastewater Treatment also provides in-depth knowledge on the biological process for application in wastewater research which presents an array of cutting-edge wastewater treatment research and thereafter its applications in treatment, remediation, sensing, and pollution prevention processes which has a significant impact on maintaining the long-term quality, availability, and viability of water. Serves as an easy-to-use guider manual for all the enlisted smart techniques Describes and discusses the emerging futuristic technologies in industrial pollutants removal from wastewater Covers advancements in biological treatments, advanced oxidation techniques, and membrane technology to remove water pollutants
Download or read book Metal Recovery from Industrial Waste written by Clyde S. Brooks and published by CRC Press. This book was released on 2018-01-18 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is offered as a practical primer on the hydrometallurgy of nonferrous metal reclamation from industrial wastes, as well as a brief discussion of pyrometallurgy, biological, and other separation processes. The objectives are to acquaint nontechnical readers with the subject as well as providing a detailed survey of current research and industrial practice to technical readers concerned with the management of industrial waste.
Download or read book Recycling and Reusing of Engineering Materials written by Waseem S. Khan and published by Elsevier. This book was released on 2022-06-02 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recycling and Reusing of Engineering Materials: Recycling for Sustainable Developments covers the latest research and developments in recycling and reusing processes, including new fundamental concepts, techniques, methods and process flows. The book provides applications of these novel technologies to recycling processes and analyzes new and modern ways of recycling techniques. It provides a comprehensive literature review on fundamental aspects of recycling processes, recycling goals, characterization of waste streams, legislative policies and evaluation, electronic recycling, aircraft recycling, recycling processes, energy savings and issues, environmental issues, societal issues, recycled materials, market development for recycling, processing facilities, and awareness and importance of recycling safety. The book is an indispensable reference for researchers in academia and industry. Scientists can use this book for literature reviews and experimental details, and the industry can use its comprehensive detail for literature reviews and to upgrade their processes and systems. Provides the latest information on recycling and reusing processes Includes the results of laboratory experiments from the recycling of electronic waste, recycling of composites, and of aircraft and plastics Covers radioactive waste treatment and biological waste disposal Written by a team of authors with teaching and industrial experience
Download or read book Precious Metals Recovery from Low grade Resources written by and published by . This book was released on 1985 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This information circular describes research the Bureau of Mines has conducted to improve technology for recovering precious metals from low-grade resources. Many of the reported findings are recent, and some of te work described is ongoing. Topics discussed include cyanidation of carbonaceous gold ores to enhance gold recovery, a new method for precipitating mercury during cyanide leaching of gold ores, a staged heap leaching process to generate suitable solutions for direct electrowinning of gold, the use of anion-exchange resins to recover gold from cyanide solutions, and precious metals recovery from electronic scrap.
Download or read book Metal Removal recovery Using Non electrolytic Metal Recovery written by Vance G. Leak and published by . This book was released on 1988 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
