Metal Removal And Recovery From Mining Wastewater And E Waste Leachate
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Metal Removal And Recovery From Mining Wastewater And E Waste Leachate
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Author : Suthee Janyasuthiwong
language : en
Publisher: CRC Press
Release Date : 2020-02-18
Metal Removal And Recovery From Mining Wastewater And E Waste Leachate written by Suthee Janyasuthiwong and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-18 with Nature categories.
Metal contamination in the environment is a persisting global issue. The metal reservoirs in the earth have declined due to society’s needs and due to uncontrolled mining activities. Therefore, the idea to recover metals from waste streams has emerged. In this thesis, cost competitive technologies such as adsorption using agro-wastes and precipitation using an inverse fluidized bed (IFB) reactor were investigated, with special emphasis on the recovery of base metals. Groundnut shell showed good potential for metal (Cu, Pb and Zn) removal. From artificial neural network modeling, the performance of the sulfate reducing bacteria (SRB) was found to be strongly pH dependent; the removal efficiency of Cu and Zn in the IFB at pH 5.0 was >97%. Electronic waste is a good candidate as secondary metal resource. The recovery of Cu from computer printed circuited boards (PCBs) using biogenic sulfide precipitation was investigated as well. Using this technology, Cu could be recovered at ~0.48 g Cu/g PCBs.
Metal Removal And Recovery From Mining Wastewater And E Waste Leachate
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Author : Suthee Janyasuthiwong
language : en
Publisher: CRC Press
Release Date : 2020-02-18
Metal Removal And Recovery From Mining Wastewater And E Waste Leachate written by Suthee Janyasuthiwong and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-18 with Nature categories.
Metal contamination in the environment is a persisting global issue. The metal reservoirs in the earth have declined due to society’s needs and due to uncontrolled mining activities. Therefore, the idea to recover metals from waste streams has emerged. In this thesis, cost competitive technologies such as adsorption using agro-wastes and precipitation using an inverse fluidized bed (IFB) reactor were investigated, with special emphasis on the recovery of base metals. Groundnut shell showed good potential for metal (Cu, Pb and Zn) removal. From artificial neural network modeling, the performance of the sulfate reducing bacteria (SRB) was found to be strongly pH dependent; the removal efficiency of Cu and Zn in the IFB at pH 5.0 was >97%. Electronic waste is a good candidate as secondary metal resource. The recovery of Cu from computer printed circuited boards (PCBs) using biogenic sulfide precipitation was investigated as well. Using this technology, Cu could be recovered at ~0.48 g Cu/g PCBs.
Sustainable Heavy Metal Remediation
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Author : Eldon R. Rene
language : en
Publisher: Springer
Release Date : 2017-10-13
Sustainable Heavy Metal Remediation written by Eldon R. Rene and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-13 with Science categories.
This book presents an assortment of case-studies pertaining to the use of sustainable technologies for heavy metal removal and recovery from mining and metallurgical wastes, construction and demolition wastes, spent catalysts and electronic wastes. Wastewaters from diverse industrial and mining activities have caused pollution problems, but these sectors also serve as a hotspot for metal recovery. Several metal removal technologies based on physical, chemical and biological processes have been successfully implemented in full-scale operation, while metal recovery, which is beneficial for economic and environmental reasons, is still limited due to challenges arising from downstream processing. For instance, microbial recovery (bioleaching) of metals from their ores is an established technology with a number of full-scale applications. Bioleaching of electronic wastes to recover metals is also a highly promising technology with low environmental impact and high cost-effectiveness; yet, this technology is still at its infancy. As the individual chapters of this book focuses on the applications and limitations of different technologies, this book will serve as an excellent resource for chemical engineers, environmental engineers, mining engineers, biotechnologists, graduate students and researchers in these areas.
E Waste In Transition
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Author : Florin-Constantin Mihai
language : en
Publisher: BoD – Books on Demand
Release Date : 2016-06-29
E Waste In Transition written by Florin-Constantin Mihai and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-06-29 with Technology & Engineering categories.
E-waste management is a serious challenge across developed, transition, and developing countries because of the consumer society and the globalization process. E-waste is a fast-growing waste stream which needs more attention of international organizations, governments, and local authorities in order to improve the current waste management practices. The book reveals the pollution side of this waste stream with critical implications on the environment and public health, and also it points out the resource side which must be further developed under the circular economy framework with respect to safety regulations. In this context, complicated patterns at the global scale emerge under legal and illegal e-waste trades. The linkages between developed and developing countries and key issues of e-waste management sector are further examined in the book.
Urban Mining For Waste Management And Resource Recovery
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Author : Pankaj Pathak
language : en
Publisher: CRC Press
Release Date : 2021-12-21
Urban Mining For Waste Management And Resource Recovery written by Pankaj Pathak and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-21 with Technology & Engineering categories.
Scientific management strategies can help in exploring anthropogenic wastes (human-made materials) as potential resources through the urban mining concept and be a panacea for sustainable development. This book covers five broader aspects of waste management and resource recovery in urban mining including solid and liquid waste management and treatment. It explains sustainable approaches of urban mining for the effective management of solid and liquid wastes and facilitates their conversion into secondary resources. Overall, this book provides details of urban mining and its different applications including current waste management problems, practices, and challenges faced worldwide. Presents a holistic approach for urban mining considering various types of wastes Describes contemporary integrated approaches for waste management with specific case studies Provides technical, social, and environmental aspects of solid and liquid wastes Considers aspects of sustainability and a circular bio-economy Incorporates pertinent case studies on water and wastewater management This volume caters to researchers and graduate students in environmental engineering, solid waste management, wastewater treatment, and materials science.
Microbial Technology For Sustainable E Waste Management
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Author : Prasenjit Debbarma
language : en
Publisher: Springer Nature
Release Date : 2023-03-01
Microbial Technology For Sustainable E Waste Management written by Prasenjit Debbarma and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-03-01 with Science categories.
This book, besides discussing challenges and opportunities, will reveal the microbe-metal interactions and strategies for e-waste remediation in different ecosystems. It will unveil the recent biotechnological advancement and microbiological approach to sustainable biorecycling of e-waste such as bioleaching for heavy metal extraction, valorization of precious metal, biodegradation of e-plastic, the role of the diverse microbial community in e-waste remediation, genetically engineered microbes for e-waste management, the importance of microbial exopolysaccharides in metal biosorption, next-generation technologies, omics-based technologies etc. It also holds the promise to discuss the conservation, utilization and cataloging indigenous microbes in e-waste-polluted niches and promising hybrid technology for sustainable e-waste management. Revolution in the area of information technology and communication is constantly evolving due to scientific research and development. Concurrently, the production of new electrical and electronic equipment also thus uplifting in this era of revolution. These technological advancements certainly have problematic consequences which is the rise of huge amounts of electronic obsoletes or electronic waste (e-waste). Improper management of both hazardous and nonhazardous substances of e-waste led to a major concern in our digital society and environment. Therefore, a sustainable approach including microbial candidates to tackle e-waste is the need of the hour. Nevertheless, the continuous demand for new-generation gadgets and electronics set this high-tech evolution to a new frontier in the last few years. With this continuing trend of technological development, e-waste is expanding exponentially worldwide. In the year of 2019, the worldwide generation of e-waste was approximately 53.6 Mt, of which only about 17.4% of e-waste was collected and recycled, and the other 82.6% was not even documented. E-waste contains various heterogeneous waste complexes such as metals (60%), blends of many polymers (30%) and halogenated compounds, radioactive elements and other pollutants (10%), respectively. The sustainable, efficient, and economic management of e-waste is thus, a challenging task today and in the coming decades. Conventional techniques such as the use of chemicals, incineration and informal ways of e-waste dismantling trigger serious health risks and contamination to the human population and environment, respectively due to the liberation of toxic and hazardous substances from the waste. In this context, bio-candidates especially microorganisms could be sharp-edged biological recycling tools to manage e-waste sustainably. As microbes are omnipresent and diverse in their physiology and functional aspects, they offer a wide range of bioremediation.
Sustainable Urban Mining Of Precious Metals
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Author : Sadia Ilyas
language : en
Publisher: CRC Press
Release Date : 2021-03-09
Sustainable Urban Mining Of Precious Metals written by Sadia Ilyas and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-03-09 with Science categories.
The rapid revolution in modern industry has led to a significant increase in waste at the end of the product lifecycle. It is essential to close the loop, secure resources, and join up the circular economy. This book provides a detailed review of extraction techniques for urban mining of precious metals including gold, silver, and the platinum group. The merits and demerits of various extraction methods are highlighted, with possible suggestions for improvements. The feasibility of hybrid extraction techniques, as well as the sustainability and environmental impact of every process, is explored. Offers a comprehensive review of different techniques used in recycling technology for urban mining of precious metals Describes the concept of urban mining and its correlation with circular economy Discusses feasibility of precious metal extraction and urban mines scope and their potential Explains the subject in-context of sustainability while describing chemistry fundamentals and industrial practices Provides technical flow sheets for urban mining of precious metals with diversity of lixiviant This book is aimed at graduate students and researchers in extractive metallurgy, hydrometallurgy, chemical engineering, chemistry, and environmental engineering.
Biogenic Sulfide Production At Low Ph And Selected Metal Precipitation For E Waste Leachate Treatment
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Author : Suthee Janyasuthiwong
language : en
Publisher:
Release Date : 2015
Biogenic Sulfide Production At Low Ph And Selected Metal Precipitation For E Waste Leachate Treatment written by Suthee Janyasuthiwong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Metal contamination in the environment is one of the persisting global issues since it not only disturbs the environmental quality but also the environment and human health. The major contribution to this problem arises mainly from anthropogenic activities such as industries. Metal scarcity has become more severe lately where some elements have been predicted to be fully eradicated in several decades from the earth crust. Recently, researchers have focused their attention to recover these metals from the waste stream and reuse it in industrial production processes. The use of agricultural wastes as a potential low cost adsorbent for heavy metal removal from wastewater is one of the most versatile technologies. In this study among the different adsorbents tested, groundnut shell established high removal efficiencies with fewer requirements for further post treatment for Cu, Pb and Zn removal. Furthermore, the batch experiments on the main effects of process parameters (pH, adsorbent dosage, contact time and initial metal concentration) showed a major effect on metal uptake and removal efficiency. For material regeneration, 0.2 M HCl was the most effective desorbing solution that did not alter the efficiency, up to three cycles of adsorption and desorption. The use of sulfate reducing bacteria (SRB) in bioreactors is another technology that can be applied for the treatment of metal contaminated wastewater. The SRB reduce sulfate into sulfide which further reacts with metals to form metal sulfide precipitates. The inverse fluidized bed (IFB) bioreactor is the configuration which shows prominence in utilizing SRB technology for metal contaminated wastewater treatment. Two IFB bioreactors were operated at different pH (7.0 and 5.0). The sulfate reducing activity (SRA) at pH 7.0 was higher than at pH 5.0, which shows that pH is the main factor that affects SRA. However, thiosulfate showed a higher efficiency than sulfate as an alternate electron acceptor. The sulfide produced using thiosulfate as the electron acceptor was 157.0 mg/L, while only 150.2 mg/L was produced using sulfate and it required an adaptation period at pH 5.0 prior to successful operation. Moreover, the IFB had shown its high efficiency for Cu, Ni and Zn removal from synthetic wastewater. The removal of Cu and Zn were more than 90% at pH 7.0 and 5.0, at an initial metal concentration of 25 mg/L. On the other hand, Ni removal was not removed at an initial concentration of 25 mg/L as it showed toxic effects toward SRB. There are various types of metal contaminated waste streams which pose as a good candidate for metal recovery include electronics waste (e-waste). This e-waste has a high potential as secondary source of metal to recover especially base metals such as Cu, Ni and Zn. Printed circuit boards (PCBs) of personal computers were evaluated as the potential secondary source of Cu, Ni and Zn using hydrometallurgical and sulfide precipitation methods. The optimal conditions for metal leaching were 0.1 M HNO3 with a liquid to solid ratio of 20 using PCBs of 0.5 - 1.0 mm particle size at 60 °C which resulted in 400 mg Cu/g PCBs. With sulfide precipitation at a stochiometric ratio of 1:1 (Cu:S2-), the recovery of Cu was very effective up to 90% from the leachate which accounted to approximately 0.41 g Cu/g PCBs, while Ni and Zn recovery were 40% (0.005 g Ni/g PCBs) and 50% (0.006 g Zn/g PCBs) for leachate from an upflow leaching column, respectively. This indicates Cu can be recovered from PCBs using sulfide precipitation.
Wastewater Treatment Residues As Resources For Biorefinery Products And Biofuels
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Author : Jose Antonio Olivares
language : en
Publisher: Elsevier
Release Date : 2019-11-21
Wastewater Treatment Residues As Resources For Biorefinery Products And Biofuels written by Jose Antonio Olivares and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-21 with Technology & Engineering categories.
Wastewater Treatment Residues as Resources for Biorefinery Products and Energy reviews wastewater treatment processes and the use of residues. The viability of end use processes for residues, such as incineration, cement additives, agricultural fertilizers, and methane production are reviewed and analyzed, as are new processes for the use of residues within a fuels production system, such as pyrolysis, hydrothermal liquefaction and syngas. Specialized chapters discuss fractionation of biomass, the production of compounds from volatile fatty acids that conceptually proceed from the anaerobic acidogenesis of residues, and a final analysis of the overall productivity and viability that can be expected from these production schemes. Discusses processes for the production of high value-added products and energy development from sludge Provides value-added technologies for resource utilization in wastewater systems Outlines sustainability assessments and comparisons of technologies and processes
Proceedings Of The 48th Industrial Waste Conference Purdue University May 1993
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Author : Ronald F. Wukasch
language : en
Publisher: CRC Press
Release Date : 1993-12-28
Proceedings Of The 48th Industrial Waste Conference Purdue University May 1993 written by Ronald F. Wukasch and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-12-28 with Technology & Engineering categories.
Known and used throughout the world, the Purdue Industrial Waste Conference Proceedings books are the most highly regarded in the waste treatment field. New research, case histories, and operating data cover every conceivable facet of today's big problems in environmental control, treatment, regulation, and compliance. This volume representing the proceedings from the 48th conference provides unparalled information and data for your current waste problems.