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Status of electronic waste recycling techniques: a review
The increasing use of electrical and electronic equipment leads to a huge generation of electronic waste (e-waste). It is the fastest growing waste stream in the world. Almost all electrical and electronic equipment contain printed circuit boards as an essential part. Improper handling of these electronic wastes could bring serious risk to human health and the environment. On the other hand, proper handling of this waste requires a sound management strategy for awareness, collection, recycling, and reuse. Nowadays, the effective recycling of this type of waste has been considered as a main challenge for any society. Printed circuit boards (PCBs), which are the base of many electronic industries, are rich in valuable heavy metals and toxic halogenated organic substances. In this review, the composition of different PCBs and their harmful effects are discussed. Various techniques in common use for recycling the most important metals from the metallic fractions of e-waste are illustrated. The recovery of metals from e-waste material after physical separation through pyrometallurgical, hydrometallurgical, or biohydrometallurgical routes is also discussed, along with alternative uses of non-metallic fraction. The data are explained and compared with the current e-waste management efforts done in Egypt. Future perspectives and challenges facing Egypt for proper e-waste recycling are also discussed.
Journal Article
Development in E-waste management : sustainability and circular economy aspects
\"This book entails the developments in the field of e-waste management with particular focus on urban mining, sustainability, and circular economy aspects. It further explains e-waste recycling technologies, supply chain aspects, e-waste disposal in IT industries including health and environmental effects of E-waste recycling processes and associated issues, challenges, and solutions. Further, it describes economic potential of resource recovery from e-waste. Features: Covers recent developments in e-waste management. Explores technological advancements such as nanotech from e-waste, MREW, fungal biotech and so forth. Reviews electronic component recycling aspects. Discusses implementation of circular economy in e-waste sector. Includes urban mining and sustainability aspects of e-waste. This book is aimed at graduate students and researchers in environmental engineering, waste management, urban mining, circular economy, waste processing, electronics, and telecommunication engineering, electrical and electronics engineering, and chemical engineering\"-- Provided by publisher.
Book
Concepts of circular economy for sustainable management of electronic wastes: challenges and management options
The electronic and electrical industrial sector is exponentially growing throughout the globe, and sometimes, these wastes are being disposed of and discarded with a faster rate in comparison to the past era due to technology advancements. As the application of electronic devices is increasing due to the digitalization of the world (IT sector, medical, domestic, etc.), a heap of discarded e-waste is also being generated. Per-capita e-waste generation is very high in developed countries as compared to developing countries. Expansion of the global population and advancement of technologies are mainly responsible to increase the e-waste volume in our surroundings. E-waste is responsible for environmental threats as it may contain dangerous and toxic substances like metals which may have harmful effects on the biodiversity and environment. Furthermore, the life span and types of e-waste determine their harmful effects on nature, and unscientific practices of their disposal may elevate the level of threats as observed in most developing countries like India, Nigeria, Pakistan, and China. In the present review paper, many possible approaches have been discussed for effective e-waste management, such as recycling, recovery of precious metals, adopting the concepts of circular economy, formulating relevant policies, and use of advance computational techniques. On the other hand, it may also provide potential secondary resources valuable/critical materials whose primary sources are at significant supply risk. Furthermore, the use of machine learning approaches can also be useful in the monitoring and treatment/processing of e-wastes.
Highlights
In 2019, ~ 53.6 million tons of e-wastes generated worldwide.
Discarded e-wastes may be hazardous in nature due to presence of heavy metal compositions.
Precious metals like gold, silver, and copper can also be procured from e-wastes.
Advance tools like artificial intelligence/machine learning can be useful in the management of e-wastes.
Graphical abstract
Journal Article
Electronic waste : recycling techniques
\"This book presents an overview of the characterization of electronic waste. In addition, processing techniques for the recovery of metals, polymers and ceramics are described. This book serves as a source of information and as an educational technical reference for practicing scientists and engineers, as well as for students.\"--Back cover.
Book
Take responsibility for electronic-waste disposal
Beyond better recycling, the ultimate aim should be a circular economy of cleaner production and less wasteful consumption, including the embrace of a sharing economy and cloud-based technologies with smaller material footprints. As the world's largest producer of electronic goods and recipient of the most e-waste, China should take the lead.
Journal Article
Electronic waste management
This new edition provides an updated overview of waste management across the world including new chapters on current issues in recycling and waste management.
Book
Estimation of E-waste Generation, Residential Behavior, and Disposal Practices from Major Governorates in Jordan
Estimating the generation of e-waste in governorates is critically needed for sustainable and environmentally sound e-waste management in Jordan. The main objectives of the present study are to quantify and evaluate the annual e-waste generation in all governorates in Jordan and disposal practices. The present study comprises the information of e-waste as classified by the European Union Directive including six main categories (16 United Nations University key items). The survey targeted 15,883 households (12.52% females and 87.48% males), where primary data on e-waste generation and disposal methods were gathered, assessed, and quantified. Subsequently, the survey-based data collected from the study sample have been extrapolated to quantify an e-waste generation inventory for Jordan and the disposal methods using ArcGIS mapping. The study-extrapolated findings reveal that ~8,735,187 e-waste items (13 ktons) had been turned into e-waste and discarded by all households in 2018 in the 12 governorates in Jordan. Moreover, dumping of e-waste is still the dominant disposal method practiced by 58.4% of households in Jordan. The other disposal practices showed that granting of the waste EEE to others has the share of 16.6%; selling (10.7%); delivering the waste EEE for environmentally sound recycling (6.8%); and others practices represented 7.4%. Furthermore, the present study has played a vital role in e-waste awareness dissemination since the findings of the present study have been modeled and shown online by the Department of Statistics, Jordan through the link (https://arcg.is/1KzvjO). Finally, the challenges, barriers, and prospects of e-waste management in Jordan have been explored in the present study.
Journal Article
A review on management practices, environmental impacts, and human exposure risks related to electrical and electronic waste in Vietnam: findings from case studies in informal e-waste recycling areas
Electrical and electronic waste (e-waste) has become a global concern, especially in developing countries. In this review, we conducted a literature survey of e-waste management practices, processing activities, and adverse effects in Vietnam, an emerging country in Southeast Asia, by gathering data from peer-reviewed articles published between 2009 and 2021. This is the first review paper to comprehensively discuss management and research aspects regarding e-waste in an Asian developing country. Due to the lack of an effective management and recycling system, a certain portion of Vietnamese e-waste has been processed by informal sectors without appropriate recycling and pollution control technology, resulting in localized contamination and human exposure to toxic chemicals. Primitive processing activities, such as manual dismantling, open burning, and plastic recycling, have been identified as important contributors to the environmental emission and human exposure to toxic elements (notably As, Mn, Ni, Pb, Zn) and organic pollutants like flame retardants, PAHs, PCBs, and dioxin-related compounds. Informal e-waste processing from these small-scale workshops can release pollutants at similar levels compared to large-scale facilities in developed countries. This fact suggests an urgent need to develop management best practices for e-waste in Vietnam as well as other emerging and developing countries, in order to increase recycling efficiency and minimize their adverse impacts on environmental and human health.
Journal Article