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https://www.readbyqxmd.com/read/29353112/bioleaching-of-metals-from-weee-shredding-dust
#1
Alessandra Marra, Alessandra Cesaro, Eldon R Rene, Vincenzo Belgiorno, Piet N L Lens
A bioleaching process developed in two separate steps was investigated for the recovery of base metals, precious metals and rare earth elements from dusts generated by Waste Electrical and Electronic Equipment (WEEE) shredding. In the first step, base metals were almost completely leached from the dust in 8 days by Acidithiobacillus thiooxidans (DSM 9463) that lowered the pH of the leaching solution from 3.5 to 1.0. During this step, cerium, europium and neodymium were mobilized at high percentages (>99%), whereas lanthanum and yttrium reached an extraction yield of 80%...
January 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29289283/the-presence-and-partitioning-behavior-of-flame-retardants-in-waste-leachate-and-air-particles-from-norwegian-waste-handling-facilities
#2
Nicolas A O Morin, Patrik L Andersson, Sarah E Hale, Hans Peter H Arp
Flame retardants in commercial products eventually make their way into the waste stream. Herein the presence of flame retardants in Norwegian landfills, incineration facilities and recycling sorting/defragmenting facilities is investigated. These facilities handled waste electrical and electronic equipment (WEEE), vehicles, digestate, glass, combustibles, bottom ash and fly ash. The flame retardants considered included polybrominated diphenyl ethers (∑BDE-10) as well as dechlorane plus, polybrominated biphenyls, hexabromobenzene, pentabromotoluene and pentabromoethylbenzene (collectively referred to as ∑FR-7)...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29274687/assessment-of-the-waste-electrical-and-electronic-equipment-management-systems-profile-and-sustainability-in-developed-and-developing-european-union-countries
#3
Dumitrita Ibanescu, Daniela Cailean Gavrilescu, Carmen Teodosiu, Silvia Fiore
The assessment of waste management systems for electrical and electronic equipment (WEEE) from developed economies (Germany, Sweden and Italy) and developing countries (Romania and Bulgaria), is discussed covering the period 2007-2014. The WEEE management systems profiles are depicted by indicators correlated to WEEE life cycle stages: collection, transportation and treatment. The sustainability of national WEEE management systems in terms of greenhouse gas emissions is presented, together with the greenhouse gas efficiency indicator that underlines the efficiency of WEEE treatment options...
December 20, 2017: Waste Management
https://www.readbyqxmd.com/read/29244778/recycling-pricing-and-coordination-of-weee-dual-channel-closed-loop-supply-chain-considering-consumers-bargaining
#4
Xiaodong Zhu, Jing Wang, Juan Tang
Environmentally friendly handling and efficient recycling of waste electrical on Waste Electrical and Electronic Equipment (WEEE) have grown to be a global social problem. As holders of WEEE, consumers have a significant effect on the recycling process. A consideration of and attention to the influence of consumer behavior in the recycling process can help achieve more effective recycling of WEEE. In this paper, we built a dual-channel closed-loop supply chain model composed of manufacturers, retailers, and network recycling platforms...
December 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29146398/improving-logistic-efficiency-of-weee-collection-through-dynamic-scheduling-using-simulation-modeling
#5
Valerio Elia, Maria Grazia Gnoni, Fabiana Tornese
The complexity of collection systems for Waste from Electric and Electronic Equipment (WEEE) in the EU is increasing, due to the latest directive that sets new collection targets and modes. The high variability and the uncertainty of reverse flows require innovative logistic approaches. One recent option for increasing efficiency and responsiveness in waste collection services, boosted by new technological solutions for waste level monitoring, is to adopt a dynamic collection scheme, where the collection frequency is not established a priori (based on a fixed plan), but it is based on the actual filling levels of waste bins...
November 13, 2017: Waste Management
https://www.readbyqxmd.com/read/29145100/environmental-assessment-of-microwaves-and-the-effect-of-european-energy-efficiency-and-waste-management-legislation
#6
Alejandro Gallego-Schmid, Joan Manuel F Mendoza, Adisa Azapagic
More than 130 million microwaves are affected by European Union (EU) legislation which is aimed at reducing the consumption of electricity in the standby mode ('Standby Regulation') and at more sustainable management of end-of-life electrical and electronic waste ('WEEE Directive'). While legislation focuses on these two life cycle stages, there is little information on the environmental impacts of the entire life cycle of microwaves. To address this gap, this paper presents a comprehensive life cycle assessment of microwaves and assesses the environmental implications of the Standby Regulation and the WEEE Directive at the EU level...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29058259/a-device-specific-prioritization-strategy-based-on-the-potential-for-harm-to-human-health-in-informal-weee-recycling
#7
Alessandra Cesaro, Vincenzo Belgiorno, Mentore Vaccari, Aleksander Jandric, Tran Duc Chung, Maria Isabel Dias, Andrew Hursthouse, Stefan Salhofer
In developing countries, the recovery of valuable materials from Waste Electrical and Electronic Equipment (WEEE) is carried out via uncontrolled practices, posing potentially severe risks both to human health and the environment. The assessment of the risk, which depends on both the kind and hazardous properties of the substances contained in WEEE, is currently limited as the exposure scenario for the single informal practice cannot be fully characterized for this purpose. In this context, this work proposes and evaluates a strategy to identify the relative potential harm of different kinds of WEEE by their content in metals, selected as the target substances of concern...
October 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29032002/recoveries-of-rare-elements-ga-ge-in-and-sn-from-waste-electric-and-electronic-equipment-through-secondary-copper-smelting
#8
Katri Avarmaa, Simon Yliaho, Pekka Taskinen
The recycling and recovery of valuable metals from waste materials is one of the key issues in maintaining the sustainability of base and rare metals. Especially WEEE (Waste Electric and Electronic Equipment) can be considered as a high potential resource for a number of valuable and critical metals like gallium, germanium and indium. During the mechanical processing of WEEE, these metals are primary separated into the non-ferrous scrap fractions, including copper fraction. As a consequence, the behavior of these valuable metals and the possibility of their recycling in secondary copper smelting are of great interest...
October 11, 2017: Waste Management
https://www.readbyqxmd.com/read/29030119/weee-plastic-sorting-for-bromine-essential-to-enforce-eu-regulation
#9
Pierre Hennebert, Montserrat Filella
The plastics of waste of electric and electronic equipment (WEEE) are improved for fire safety by flame retardants, and particularly brominated flame retardants (BFR). As waste, the management of these plastic fractions must comply with the update of the regulation of waste hazard classification (2014, 2017), the publication of a technical standard on management of WEEE (2015), and a restriction of use for decabromodiphenylether in the product regulation (2017). Data of bromine (n=4283) and BFR concentrations (n=98) in plastics from electric and electronic equipment (EEE), and from WEEE processing facilities before and after sorting for bromine in four sites in France have been studied for chemical composition and for regulatory classification...
October 10, 2017: Waste Management
https://www.readbyqxmd.com/read/28967530/use-of-laser-induced-breakdown-spectroscopy-for-the-determination-of-polycarbonate-pc-and-acrylonitrile-butadiene-styrene-abs-concentrations-in-pc-abs-plastics-from-e-waste
#10
Vinicius Câmara Costa, Francisco Wendel Batista Aquino, Caio Marcio Paranhos, Edenir Rodrigues Pereira-Filho
Due to the continual increase in waste generated from electronic devices, the management of plastics, which represents between 10 and 30% by weight of waste electrical and electronic equipment (WEEE or e-waste), becomes indispensable in terms of environmental and economic impacts. Considering the importance of acrylonitrile-butadiene-styrene (ABS), polycarbonate (PC), and their blends in the electronics and other industries, this study presents a new application of laser-induced breakdown spectroscopy (LIBS) for the fast and direct determination of PC and ABS concentrations in blends of these plastics obtained from samples of e-waste...
September 26, 2017: Waste Management
https://www.readbyqxmd.com/read/28898811/modelling-the-correlations-of-e-waste-quantity-with-economic-increase
#11
Abhishek Kumar Awasthi, Federica Cucchiella, Idiano D'Adamo, Jinhui Li, Paolo Rosa, Sergio Terzi, Guoyin Wei, Xianlai Zeng
Waste from Electrical and Electronic Equipment (WEEE or e-waste) is regarded as one of the fastest growing waste streams in the world and is becoming an emerging issue owing to adverse consequences on the natural environment and the human health. This research article reveals the presence of a strong linear correlation among global e-waste generation and Gross Domestic Product. The obtained results indicate that the best fit for data can be reached by comparing e-waste collected volumes and GDP PPS. More in detail, an increase of 1000 GDP PPS means an additional 0...
February 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28803340/emission-characteristics-of-pbdes-during-flame-retardant-plastics-extruding-process-field-investigation-and-laboratorial-simulation
#12
Chao Deng, Ying Li, Jinhui Li, Yuan Chen, Huafen Li
Though mechanical recycling of WEEE plastics is supposed to be a promising method, PBDEs release and the resulting contamination during its processing remain unclear yet. The distribution of PBDEs pollution in production lines was investigated from two flame-retardant plastic modification plants in Southern China. This was followed by laboratory simulation experiments to characterize the emission processes. PBDEs concentrations ranged from 37 to 31,305 ng/L in cooling water and from 40,043 to 216,653 ng/g dry wt in solid samples taken during the field investigation...
October 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28757222/internet-of-things-and-big-data-as-potential-solutions-to-the-problems-in-waste-electrical-and-electronic-equipment-management-an-exploratory-study
#13
Fu Gu, Buqing Ma, Jianfeng Guo, Peter A Summers, Philip Hall
Management of Waste Electrical and Electronic Equipment (WEEE) is a vital part in solid waste management, there are still some difficult issues require attentionss. This paper investigates the potential of applying Internet of Things (IoT) and Big Data as the solutions to the WEEE management problems. The massive data generated during the production, consumption and disposal of Electrical and Electronic Equipment (EEE) fits the characteristics of Big Data. Through using the state-of-the-art communication technologies, the IoT derives the WEEE "Big Data" from the life cycle of EEE, and the Big Data technologies process the WEEE "Big Data" for supporting decision making in WEEE management...
July 27, 2017: Waste Management
https://www.readbyqxmd.com/read/28751173/identification-and-recovery-of-rare-earth-permanent-magnets-from-waste-electrical-and-electronic-equipment
#14
A Lixandru, P Venkatesan, C Jönsson, I Poenaru, B Hall, Y Yang, A Walton, K Güth, R Gauß, O Gutfleisch
Nd-Fe-B permanent magnets are a strategic material for a number of emerging technologies. They are a key component in the most energy efficient electric motors and generators, thus, they are vital for energy technologies, industrial applications and automation, and future forms of mobility. Rare earth elements (REEs) such as neodymium, dysprosium and praseodymium are also found in waste electrical and electronic equipment (WEEE) in volumes that grow with the technological evolution, and are marked as critical elements by the European Commission due to their high economic importance combined with significant supply risks...
July 24, 2017: Waste Management
https://www.readbyqxmd.com/read/28739025/soldering-mask-laser-removal-from-printed-circuit-boards-aiming-copper-recycling
#15
Marcus Paulo Raele, Lucas Ramos De Pretto, Denise Maria Zezell
Management of waste of electric and electronic equipment (WEEE) is a key issue for modern societies; furthermore, it contains valuable materials that can be recycled, especially in printed circuit boards (PCB), which have approximately one-third of their weight in copper. In this study we demonstrated the use of laser to strip the covering soldering mask on PCB's, thus exposing the copper underneath so that extraction techniques may take place. Using a Q-Switched Nd:YAG laser operating at 1064nm and 532nm we tested the procedure under different energy conditions...
July 21, 2017: Waste Management
https://www.readbyqxmd.com/read/28685328/generation-of-domestic-waste-electrical-and-electronic-equipment-on-fernando-de-noronha-island-qualitative-and-quantitative-aspects
#16
Dhiego Raphael Rodrigues Araujo, José Diego de Oliveira, Vanice Fragoso Selva, Maisa Mendonça Silva, Simone Machado Santos
The accelerated growth trajectory of waste electrical and electronic equipment (WEEE) is a matter of concern for governments worldwide. In developing countries, the problem is more complex because municipal waste management is still a challenge for municipalities. Fernando de Noronha Island, an environmentally protected area, has a transfer station for solid waste before it is sent to the final destination abroad, which is different waste management model to most urban areas. In order to check the specifics of management of WEEE, this study aimed to qualitatively and quantitatively evaluate the generation of this type of waste on the main island of Fernando de Noronha, taking into consideration aspects related to consumption habits and handling of waste...
July 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28669496/using-choice-architecture-to-exploit-a-university-distinct-urban-mine
#17
REVIEW
Xavier Pierron, Ian D Williams, Peter J Shaw, Victoria Cleaver
There are widespread concerns regarding the potential future scarcity of ferrous and non-ferrous materials. However, there are already potentially rich reserves of secondary materials via high ownership of Electrical and Electronic Equipment (EEE) in economically-developed nations. Young people are particularly high consumers of EEE, thus university students and campuses may present an opportunity to harness this potential. University Distinct Urban Mines (DUM) may be used to exemplify how potential reserves of secondary metals may be exploited, and could contribute to the transition from a linear to a circular economy...
June 29, 2017: Waste Management
https://www.readbyqxmd.com/read/28636053/evidence-of-bad-recycling-practices-bfrs-in-children-s-toys-and-food-contact-articles
#18
A Guzzonato, F Puype, S J Harrad
Brominated flame retardants (BFRs) have been used intentionally in a wide range of plastics, but are now found in an even wider range of such materials (including children's toys and food contact articles) as a result of recycling practices that mix BFR-containing waste plastics with "virgin" materials. In this study Br was quantified in toy and food contact samples on the assumption that its concentration can be used as a metric for BFR contamination. Subsequently, compound specific determination of BFRs was performed to evaluate the validity of the aforementioned assumption, crucial to render rapid, inexpensive, in situ Br determination in non-laboratory environments (such as waste handling facilities) a viable option for sorting wastes according to their BFR content...
July 19, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28587804/extraction-of-lead-from-waste-crt-funnel-glass-by-generating-lead-sulfide-an-approach-for-electronic-waste-management
#19
Biao Hu, Wenlong Hui
Waste cathode ray tube (CRT) funnel glass is the key and difficult points in waste electrical and electronic equipment (WEEE) disposal. In this paper, a novel and effective process for the detoxification and reutilization of waste CRT funnel glass was developed by generating lead sulfide precipitate via a high-temperature melting process. The central function in this process was the generation of lead sulfide, which gathered at the bottom of the crucible and was then separated from the slag. Sodium carbonate was used as a flux and reaction agent, and sodium sulfide was used as a precipitating agent...
June 3, 2017: Waste Management
https://www.readbyqxmd.com/read/28579144/e-waste-collection-in-italy-results-from-an-exploratory-analysis
#20
Marinella Favot, Luca Grassetti
This study looks at the performance of household electrical and electronic waste (WEEE) collection in 20 Italian regions from 2008 to 2015. The impact of several explicative variables on the results of e-waste collection is evaluated. The independent variables are socio-economic and demographic ones (age, gender, household size, education level, migration and income) along with technical-organisational variables (population density, presence of metropoles, macro regions, characteristics of the territory, percentage of household waste collected separately and number of e-waste collection points)...
May 31, 2017: Waste Management
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