检索结果-南通市图书馆

Journal of environmental Protection 2013年第9期4卷 1011-1017页

作者： Fatima Badiru Ibrahim Donatus Begianpuye Adie Abdul-Raheem Giwa Sule Argungu Abdullahi Charles Amen Okuofu Department of Textile Science and Technology Ahmadu Bello University Zaria Nigeria. Department of Water Resources & environmental engineering Ahmadu Bello University Zaria Nigeria

The fate of end-of-life electronics (e-wastes) is of increasing concern because of their toxicity and ever increasing volumes. Addressing these concerns requires proper management plans and strategy which in turn requires reliable estimates of e-waste generation in the present as well as future times. In this study, a material flow model for the analysis of e-waste generation from computer equipments inNigeriahas been developed. Data used to develop the model are the sales data from major distributors of electronics, usage time of computer equipments and transfer coefficients of the electronics from one stage to another. The analysis of individual flows of computer from the material flow model showed that the fate of obsolete computer equipments were storage (41%), reuse (35%) and direct disposal (24%). The projections of the flows for a period of 15 years also indicated that storage and reuse of computer equipments would be preferred over direct disposal;and computer equipments would continue to remain in either storage, re-use or gradually disposed off for about 11 years after its inflow. This delay or staggering disposal is of advantage as it would reduce the amount of e-waste disposed yearly and also afford the country some time to make plans to accommodate and manage the e-wastes generated more efficiently.

关键词： e-waste Material Flow Model Computer equipment Nigeria

Heterogeneous Cu_(x)O Nano‑Skeletons from waste electronics for enhanced Glucose Detection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第11期16卷 554-568页

作者： Yexin Pan Ruohan Yu Yalong Jiang Haosong Zhong Qiaoyaxiao Yuan Connie Kong Wai Lee Rongliang Yang Siyu Chen Yi Chen Wing Yan Poon Mitch Guijun Li Center on Smart Manufacturing Division of Integrative Systems and DesignThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SAR 999077People’s Republic of China The Sanya Science and education Innovation Park of Wuhan University of Technology Sanya 572000People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China

electronic waste(e-waste)and diabetes are global challenges to modern ***,solving these two challenges together has been challenging until ***,we propose a laser-induced transfer method to fabricate portable glucose sensors by recycling copper from *** bring up a laser-induced full-automatic fabrication method for synthesizing continuous heterogeneous Cu_(x)O(h-Cu_(x)O)nano-skeletons electrode for glucose sensing,offering rapid(ean,air-compatible,and continuous fabrication,applicable to a wide range of Cu-containing *** this approach,h-Cu_(x)O nanoskeletons,with an inner core predominantly composed of Cu_(2)O with lower oxygen content,juxtaposed with an outer layer rich in amorphous Cu_(x)O(a-Cu_(x)O)with higher oxygen content,are derived from discarded printed circuit *** employed in glucose detection,the h-Cu_(x)O nano-skeletons undergo a structural evolution process,transitioning into rigid Cu_(2)O@CuO nano-skeletons prompted by electrochemical *** transformation yields exceptional glucose-sensing performance(sensitivity:9.893 mA mM^(-1) cm^(-2);detection limit:0.34μM),outperforming most previously reported glucose *** functional theory analysis elucidates that the heterogeneous structure facilitates gluconolactone *** glucose detection device has also been downsized to optimize its scalability and portability for convenient integration into people’s everyday lives.

关键词： Copper oxide electron 3D tomography e-waste Glucose detection electrochemical activation

Competition among rare earth elements on sorption onto six seaweeds

在线全文

学校读者我要写书评

暂无评论

Journal of Rare earths 2021年第6期39卷 734-741,I0005页

作者： Joāo Pinto Marcelo Costa Bruno Henriques JoséSoares Mariana Dias Thainara Viana Nicole Ferreira Carlos Vale JoséPinheiro-Torres eduarda Pereira Department of Chemistry University of Aveiro3810-193 AveiroPortugal CeSAM Department of ChemistryUniversity of Aveiro3810-193 AveiroPortugal LAQV-ReQUIMTe Department of Chemistry&Central Laboratory of AnalysisUniversity of Aveiro3810-193 AveiroPortugal CIIMAR一Interdisciplinary Centre of Marine and environmental Research MatosinhosPortugal N9Ve-Nature Ocean and ValueLdaPortoPortugal Central Laboratory of Analysis University of Aveiro3810-193 AveiroPortugal

Sorption has been proposed as a promising approach towards a sustainable water decontamination and recently to the recycling of rare earth elements(Ree).Although living seaweed have been shown to be capable of removing Ree from contaminated solutions,no studies have yet compared the effects of Ree competition on sorption onto different groups of *** effects were analysed in the present study by exposing six living seaweeds(Ulva lactuca,Ulva intestinalis,Fucus spiralis,Fucus vesiculosus,Gracilaria *** Osmundea pinnatifida)(3 g/L,fresh weight) to mono-element and multi-element solutions of Y,La,Ce,Pr,Nd,eu,Gd,Tb and Dy(1 μmol/L).Results show a preference towards light Ree in mono-element solutions,which is reduced when in competition with other *** competitive effect is less pronounced in heavy Ree indicating that these are still able to bind to the macroalgae despite the presence of competing *** to water content(%),seaweed specific surface area(cm^(2)/g) shows to be an important factor in the sorption of Ree,since larger surface area is associated with higher removal and larger competitive effect.

关键词： Bioaccumulation wastewater e-waste Recovery Removal Marine macroalgae

Assessment of toxicity potential of metallic elements in discarded electronics:A case study of mobile phones in China

在线全文

学校读者我要写书评

暂无评论

Journal of environmental Sciences 2008年第11期20卷 1403-1408页

作者： A.Middendorf Department of environmental engineering Fraunhofer IZMGustav-Meyer-Allee 2513355 BerlinGermany

The electronic waste (e-waste) is increasingly flooding Asia,especially China.e-waste could precipitate a growing volume of toxic input to the local environment if it was not handed *** makes the evaluation of environmental impact from electronics an essentially important task for the life cycle assessment (LCA) and the end-of-life management of electronic *** study presented a quantitative investigation on the environmental performance of typical *** types of disposed mobile...

关键词： e-waste enviromental impact toxicity potential indicator (TPI) mobile phones (MPs)

“waste”-ing away:Presence of Cu ions influences microbial degradation kinetics and metabolite formation of the prevalent brominated flame retardant BDe-47

在线全文

学校读者我要写书评

暂无评论

Journal of environmental Sciences 2020年第1期32卷 421-424页

作者： Jie Chen Birget Moe Lizhong Zhu X.Chris Le Department of environmental Science Zhejiang UniversityHangzhou 310058China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou 310058China Division of Analytical and environmental Toxicology Department of Laboratory Medicine and PathologyUniversity of AlbertaEdmontonT6G 2G3AlbertaCanada Alberta Centre for Toxicology Department of Physiology and PharmacologyUniversity of CalgaryCalgaryT2N 4N1AlbertaCanada Department of environmental Science Zhejiang UniversityHangzhou310058China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou310058China

Have you ever wondered what happened to that old cell phone you threw out last month?How about the 150 million other cell phones that were also disposed of in the past year?Although the world population has doubled in the past 50 years,global consumption of electronic devices has increased six fold(Belkhir and elmeligi,2018)with nearly 45 million tonnes of electronic waste(e-waste)being produced in 2016 alone(Balde et al.,2017).That equates to 6.1 kg of e-waste per person across the globe and is equivalent in weight to over four thousand eiffel towers(Balde et al.,2017)!

关键词： BDe-47 Polybrominated diphenyl ethers Copper Pycnoporus sanguineus Microbial degradation Metabolites e-waste

Take back and treatment of discarded electronics： a scientific update

在线全文

学校读者我要写书评

暂无评论

Frontiers of environmental Science & engineering 2013年第4期7卷 475-482页

作者： Ab STeVeLS Jaco HUISMAN Feng WANG Jinhui LI Boyang LI Huabo DUAN Design for Sustainability Lab Delft University of Technology Delft 2600 The Netherlands Department of environmental Science and engineering Tsinghua University Beijing 100084 China

This paper indicates that the performance of tack-back and treatment of electronic waste （e-waste） system can be improved substantially. This can be reached by better taking into account in a better way the big variety in material composition and potential toxicity of electrical and electronic products - from a technical, organizational and regulatory perspective. Realizing that there is no ＇one size fit for all＇ and combining smart tailor made solutions with economic of sale will result in the best environmental gain/cost ratio. Several examples show how science and engineering have supported or will support this approach.

关键词： e-waste take back treatment substantially

Numerical study on the role of microwave-metal discharge in microwave pyrolysis of WPCBs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

waste Disposal and Sustainable energy 2021年第3期3卷 185-200页

作者： Zhenyu Jiang Jing Sun Wenlong Wang Huacheng Zhu Jingwei Li Zhanlong Song Xiqiang Zhao Yanpeng Mao Shouyan Chen National engineering Laboratory for Reducing emissions from Coal Combustion Engineering Research Center of Environmental Thermal Technology of Ministry of EducationShandong Key Laboratory of Energy Carbon Reduction and Resource UtilizationSchool of Energy and Power EngineeringShandong UniversityJinanChina Key Laboratory of the Wireless Power Transfer College of Electronic and Information EngineeringSichuan UniversityChengduChina

As a promising green technology,microwave heating is highlighted by its high efficiency and low consumption,especially in the fast pyrolysis treatment for e-waste *** discharge induced by microwave-metal interaction plays a significant role in the process,and its contribution to heat generation is,however,always hard to define qualitatively through direct *** this simulation,a microwave heating model featuring the pulsed microwave-metal(MW-m)discharge was designed in multi-dimensions,using COMSOL Multiphysics software,to emphatically probe the depth and extent of the hot-spot effect as well as its auxo-action on the pyrolysis process of waste printed circuit boards(WPCBs).The energy loss generated by MW-m discharge was added into the models in the form of a built-in fluctuating heat source,and it is found that at a relatively low microwave energy-to-heat conversion rate(31.5%,220.5 W),due to the unique thermal effect of microwave-metal discharge,it can achieve an ideal pyrolysis *** on the results,the instantaneous heat by discharge is generated in the similar trend of radiation pulses,and the local temperature of discharge spots can reach more than 2000 K the instant the discharge occurs,shortening the overall pyrolysis from dozens of minutes to around 200 s.

关键词： Microwave heating electric discharge Hot-spot effect e-waste Pyrolysis

Polybrominated biphenyl exposure and thyroid function tests in electronic waste dismantling and general population of Chinese adults

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

emerging Contaminants 2024年第1期10卷 72-79页

作者： Shijie Wang Jingxi Jin Zhitong Zhang Chen Guo Zhigang Li Jicheng Hu Ying Wang Yongjie Wei Jun Jin College of Life and environmental Sciences Minzu University of ChinaBeijing 100081China Department of Laboratorial Science and Technology School of Public HealthPeking UniversityBeijing 100191China State Key Laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China engineering Research Center of Food environment and Public Health Beijing 100081China Center for Global Health School of Public HealthNanjing Medical UniversityChina

This study aimed to determine the concentration of 35 PBB(polybrominated biphenyls)congeners in the human serum of residents from an electronic waste(e-waste)dismantling area compared to a control area in ***,four thyroid hormones,namely FT3,FT4,TSH,and TRH,were also *** findings revealed that the total PBB concentrations(sum of the 35 PBB congeners)ranged from 47.1 to 1360 ng/g lipid in the e-waste area and 105–1980 ng/g lipid in the control ***-1 and BB-10 were the dominant congeners in both study areas,followed by *** to the e-waste dismantling area,the control area samples had a significantly higher concentration of less-brominated(Br1–3)PBBs,including the concentrations of less-brominated congeners such as BB-1,BB-4,BB-9,and BB-10,which were significantly higher than those in the e-waste dismantling ***,more-brominated hexabromobiphenyl congeners BB-153,BB-154 and BB-155 were found in samples from the e-waste dismantling area at significantly higher concentrations than in the control area.e-waste dismantling areas have released historically produced commercial PBB products,but equally not negligible is the exposure of the general population to newly produced PBB *** concentrations in the e-waste dismantling area samples decreased with increasing age,while they increased with increasing age in the control area ***,stepwise multiple regression analysis showed a significant association between BB-103 concentrations and thyroid hormone *** addition,BB-103 has the potential to interfere with the binding of T3 and thyroid hormone receptors(TR).Given these findings,the research on human exposure of PBB and the relationships between the PBB and thyroid hormones should be studied further.

关键词： Polybrominated biphenyls Human serum e-waste Thyroid hormone Human exposure

MiR-125a-5p is Upregulated in Plasma of Residents from An electronic waste Recycling Site

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

生态毒理学报 2016年第2期11卷 134-143页

作者： Li Ran Qiu Xinghua Yang Qiaoyun Li Keqiu Li Guang State Key Joint Laboratory for environmental Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and Health Peking University Basic Medical College Tianjin Medical University

The mechanism of health effects caused by organohalogen pollutants, e.g., toxins from electronic waste(e-waste), is poorly understood. We supposed that micro RNAs(mi RNAs), an important post-transcriptional regulator, could play a role in this process. In this study, fasting peripheral blood samples were collected from residents living at an e-waste site in northern China and a nearby reference population. Concentrations of e-waste related organohalogen pollutants in plasma from the exposure group were higher than the corresponding measurement in the reference group. Correspondingly, sixty mi RNAs in plasma showed > 2-fold change between the two groups in microarray analysis. Among them, mi R-125a-5p was confirmed to be upregulated by q RT-PCR and its validated targets were enriched in responses to xenobiotics and cancer related pathways. Furthermore, significant positive correlations were found between levels of mi R-125a-5p in plasma and reactive oxygen species(ROS) in polymorphonuclear neutrophil leukocytes(P ese evidences suggested oxidative stress might be an intermediate between e-waste related POPs exposure and alteration of plasma mi RNA.

关键词： e-waste originated pollutants micro RNA mi R-125a-5p epigenetics oxidative stress