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Evaluating the treatment of E-waste──a case study of discarded refrigerators

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Journal of China University of Mining and Technology 2008年第3期18卷 454-458页

作者： deng jian-jun WEN Xue-feng ZHAO Yue-min School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China National Center of Solid Waste Management MEP Beijing 100029 China

Disassembly and recycling of E-waste creates a series of environmental problems. The selection of a technologically reliable, environmentally friendly, economically affordable and socially acceptable recycling technology for E-waste is a significant question. This study establishes a Monte-Carlo mathematical model of cost minimization, given the constraints of environmentally sound handling of the e-waste, in the context of Crystal Ball risk assessment and evaluation software. By following the streams of the different treatment processes, which consist of various technologies including disassembly, recycling and disposal, the econom-ics of various possibilities were identified and the optimal recycling technology proposed. The key factors of the proposed scenarios were determined by using sensitivity analysis. The results of this study show that, for discarded refrigerators, the operating life span plays the key role. The model supports maintenance and resale of the short lived refrigerators. For the longer lived refrigerators material recycling is recommended by the model. Sensitivity analysis shows that purchase cost, plastic sale price, condenser sale price and disassembly costs are the main effects. This study provides a significant technical support for policy making in E-waste management.

关键词： E-waste end-of-life refrigerator recycling Monte-carlo method sensitivity analysis

The composition of magmatic-hydrothermal fluids and their related metal mineralization

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Science China Earth Sciences 2025年第1期68卷 208-225页

作者： Qihai SHU jun deng State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences and Resources China University of Geosciences Frontiers Science Center for Deep-time Digital Earth China University of Geosciences

Magmatic hydrothermal deposits are important sources of many bulk, precious, and rare metals, and have attracted interest from both academic and industrial communities. However, it is still unclear if the major enrichment of the ore-forming metals occurs in the parental magma source region, during the magma evolution, or after the fluid exsolution. Fluid inclusions trapped in hydrothermal minerals crystallized in the early, high-temperature stage before metal precipitation record information close to that of the initially exsolved magmatic fluids, which are helpful in revealing whether the metals have been already significantly enriched prior to the hydrothermal stage. In this study, available compositional data of such early-stage fluid inclusions from magmatic hydrothermal systems globally have been compiled. The results indicate that the concentrations of Cu,Sn, and W respectively from the Cu-, Sn-, and W-mineralized fluids are significantly higher than the hydrothermal systems that do not produce ores with the corresponding metals. This suggests that Cu, Sn, and W could have already been enriched in the magma source and/or magma evolution stage. The Mo concentrations show no difference between Mo-mineralized and Mobarren fluid systems, indicating no significant pre-enrichment in the source region or during the magma evolution. This also implies that an efficient collection of Mo from a large volume of magmas is required to account for the formation of a large Mo deposit. Almost all the hydrothermal fluids contain high concentrations of Fe and Zn-Pb, but only a few of them eventually form Fe or Zn-Pb deposits, reflecting an important role of the hydrothermal evolution process on the selective metal *** above results indicate that different metals are enriched in different stages of a magmatic hydrothermal system, and that the major roles played in the formation of a deposit vary with the metal types. In addition to the metal concentrations in the o

关键词： Magmatic hydrothermal deposits Fluid inclusions LA-ICP-MS Metal enrichment Mineralization mechanism

Structural engineering of high-entropy alloys for advanced electrocatalytic reactions

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Tungsten 2025年第1期7卷 1-31页

作者： Qiao Xie Ying-Jie Yu Hai-jun Zhang Ya-Ping deng Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Department of Chemical Engineering Waterloo Institute for Sustainable Energy Waterloo Institute for Nanotechnology University of Waterloo

High-entropy alloys(HEAs) have emerged as promising candidates to replace traditional precious metal catalysts,owing to their unique chemical and physical *** review commences by revisiting the fundamental concepts of HEAs,including their synthesis methods and structural control strategies in *** underscores the critical role of meticulously manipulating both macroscopic and microscopic structures of the HEAs to optimize their catalytic performance.A deep understanding of the structure-activity relationship in HEAs across various configurations is pivotal in developing more effective *** review methodically encapsulates the research progress of structural control strategies for HEAs in achieving efficient energy conversion,with the aim of gaining a better understanding of the relationship between structure and *** review concludes by summarizing the current achievements and challenges,and suggestions for potential future directions of HEAs in the fields of energy conversion and environmental purification.

关键词： Electrocatalytic Energy conversion High-entropy alloys Structural modulation

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丙烯差压热耦合精馏塔动态模拟与控制

现代化工 2018年第3期38卷 223-228页

作者：赵建章邓建军中国矿业大学化工学院江苏徐州221116 新疆工程学院化学与环境工程系新疆乌鲁木齐830091

以炼厂气体分馏装置丙烯精馏为例,利用Aspen Plus建立差压热耦合精馏稳态模拟,在此基础上运用Aspen Dynamics对RR-BR控制方案和D-B控制方案的动态特性进行研究,并与常规精馏进行比较。结果表明,该系统没有因为热耦技术的引入而使其对抗... 详细信息

以炼厂气体分馏装置丙烯精馏为例,利用Aspen Plus建立差压热耦合精馏稳态模拟,在此基础上运用Aspen Dynamics对RR-BR控制方案和D-B控制方案的动态特性进行研究,并与常规精馏进行比较。结果表明,该系统没有因为热耦技术的引入而使其对抗进料量和组成干扰的动态性能变差,RR-BR控制方案控制质量要优于D-B控制方案,主换热器的换热负荷和换热面积是差压热耦合精馏系统关键。

关键词：控制动态仿真计算机模拟丙烯/丙烷差压热耦合

纳米纤维固相萃取-高效液相色谱-荧光检测麻辣烫汤液中喹诺酮类药物

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分析化学 2014年第8期42卷 1171-1176页

作者：邓思维邓剑军王婷婷王羽康学军东南大学学习科学研究中心儿童发展与学习科学教育部重点实验室苏州东奇生物科技有限公司东南大学苏州研究院苏州市环境与生物安全重点实验室

建立了固相萃取-高效液相色谱-荧光检测麻辣烫汤液中5种喹诺酮类抗生素的分析方法。麻辣烫汤液样品经EDTA-Mcllvaine缓冲溶液(pH 4)提取后,以HCX固相萃取小柱净化富集,用水淋洗,2%氨化甲醇洗脱。采用高效液相色谱-荧光检测器(HPLC-FLD)... 详细信息

建立了固相萃取-高效液相色谱-荧光检测麻辣烫汤液中5种喹诺酮类抗生素的分析方法。麻辣烫汤液样品经EDTA-Mcllvaine缓冲溶液(pH 4)提取后,以HCX固相萃取小柱净化富集,用水淋洗,2%氨化甲醇洗脱。采用高效液相色谱-荧光检测器(HPLC-FLD),于激发波长280 nm,发射波长450 nm处进行检测,流动相为甲醇-水-磷酸(25∶75∶0.1,V/V,三乙胺调至pH 2.8)。麻辣烫汤液样品中氟罗沙星、诺氟沙星、沙拉沙星、环丙沙星、奥比沙星5种喹诺酮类抗生素加标回收率为72.1%110.3%;日内相对标准偏差(RSD)为1.6%4.3%,日间相对标准偏差为2.0%4.3%;检出限(LOD)为1.25.4μg/L;定量限(LOQ)为3.918μg/L。本方法能够满足实际麻辣烫汤液样品的分析要求。

关键词：麻辣烫汤液喹诺酮类抗生素固相萃取高效液相色谱荧光检测

力矩与水平荷载联合作用下裙板式基础破坏包络面研究

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岩土力学 2011年第12期32卷 3577-3583页

作者：范庆来邓建俊周爱军栾茂田鲁东大学岩土工程重点实验室山东烟台264025 大连理工大学海岸和近海工程国家重点实验室辽宁大连116024

联合采用swipe加载模式、固定位移比与固定荷载比加载模式,对于裙板式浅基础在水平荷载与力矩荷载的复合加载条件下的承载性能进行比较系统的平面应变有限元分析,主要探讨了裙板式基础埋深、地基土不排水强度的非均质性对于基础破坏包... 详细信息

联合采用swipe加载模式、固定位移比与固定荷载比加载模式,对于裙板式浅基础在水平荷载与力矩荷载的复合加载条件下的承载性能进行比较系统的平面应变有限元分析,主要探讨了裙板式基础埋深、地基土不排水强度的非均质性对于基础破坏包络面的影响,揭示了地基在水平和力矩荷载的不同组合条件下的失稳破坏机制。同时,对于两种swipe加载模式的有效性进行了比较。计算结果表明:对于非均质土,当裙板式基础埋深与宽度之比大于0.3时,破坏包络面产生正方向倾斜;当埋深与宽度之比小于0.3时,基础的破坏包络面出现负方向倾斜。而在均质土中,基础的破坏包络面没有出现负方向倾斜。

关键词：裙板式基础破坏包络面复合加载有限元分析非均质

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X射线闪光照相杆箍缩二极管技术最新进展

强激光与粒子束 2006年第4期18卷 643-647页

作者：陈林谢卫平邓建军中国工程物理研究院流体物理研究所四川绵阳621900

综合介绍了杆箍缩二极管的应用背景、工作原理和目前的研究概况,并阐述了目前较为典型的两种二极管,即真空杆箍缩二极管和等离子体填充杆箍缩二极管的性能。详细介绍了已经用于地下实验的Cygnus装置的运行参数和实验结果。最后分析了杆... 详细信息

综合介绍了杆箍缩二极管的应用背景、工作原理和目前的研究概况,并阐述了目前较为典型的两种二极管,即真空杆箍缩二极管和等离子体填充杆箍缩二极管的性能。详细介绍了已经用于地下实验的Cygnus装置的运行参数和实验结果。最后分析了杆箍缩二极管在X射线闪光照相领域的发展前景。

关键词：杆箍缩二极管闪光照相辐射剂量焦斑直径

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Rod-pinch二极管理论及数值模拟

强激光与粒子束 2007年第2期19卷 348-352页

作者：马成刚邓建军谢敏中国工程物理研究院流体物理研究所四川绵阳621900

介绍了Rod-pinch二极管的基本结构和工作原理,采用Laminar模型分析了Rod-pinch二极管中的粒子运动过程及其阻抗特性。考虑背景空间离子电荷的影响,用1维Laminar方程分析Rod-pinch二极管中电子的自箍缩过程,并且利用Magic程序对其中的粒... 详细信息

介绍了Rod-pinch二极管的基本结构和工作原理,采用Laminar模型分析了Rod-pinch二极管中的粒子运动过程及其阻抗特性。考虑背景空间离子电荷的影响,用1维Laminar方程分析Rod-pinch二极管中电子的自箍缩过程,并且利用Magic程序对其中的粒子运动进行数值模拟,求解二极管中的电压和电流,最终得出二极管的阻抗特性,在较低电压下,负极性RPD的性能明显不如正极性RPD。根据临界电流经验公式,初步验证Laminar理论模型的可行性。

关键词： Laminar模型 Rod-pinch二极管数值模拟阻抗特性

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欠匹配二极管有效电流评估

强激光与粒子束 2007年第6期19卷 992-996页

作者：邹文康邓建军宋盛义中国工程物理研究院流体物理研究所四川绵阳621900

介绍了一种基于Creedon磁绝缘层流理论,预测磁绝缘传输线(MITL)中反射波前沿经过后由电子再俘获引起MITL工作点变化的方法。当二极管相对于MITL欠匹配时,如果MITL前行波工作点和二极管阻抗已知,该方法可以定量求解反射波前沿经过后MITL... 详细信息

介绍了一种基于Creedon磁绝缘层流理论,预测磁绝缘传输线(MITL)中反射波前沿经过后由电子再俘获引起MITL工作点变化的方法。当二极管相对于MITL欠匹配时,如果MITL前行波工作点和二极管阻抗已知,该方法可以定量求解反射波前沿经过后MITL的阴极电流,进而得到二极管中用于产生X射线的有效电流。与PIC模拟对比表明:该方法具有较高的准确性,可用来评估近轴二极管、磁浸没式二极管等负载用于产生X射线的最大有效电流。

关键词：闪光照相二极管磁绝缘传输线层流电子再俘获欠匹配