Spent rechargeable lithium batteries in e-waste: composition and its implications

The amount of spent rechargeable lithium batteries （RLBs） is growing rapidly owing to wide application of these batteries in portable electronic devices and electric vehicles, which obliges that spent RLBs should be handled properly. Identification of spent RLBs can supply fundamental information for spent RLBs recycling. This study aimed to determine the differences of physical components and chemical compositions among various spent RLBs. All the samplings of RLBs were rigorously dismantled and measured by an inductive coupled plasma atomic emission spectrometer. The results indicate that the average of total weight of the separator, the anode and the cathode accounted for over 60% of all the RLBs. The weight ratio of valuable metals ranged from 26% to 76%, and approximately 20% of total weight was Cu and Al. Moreover, no significant differences were found among different manufacturers, applications, and electrolyte types. And regarding portable electronic devices, there is also no significant difference in the Co-Li concentration ratios in the leaching liquid of RLBs.     

Application of probabilistic risk assessment at a coking plant site contaminated by polycyclic aromatic hydrocarbons

Application of Probabilistic Risk Assessment （PRA） and Deterministic Risk Assessment （DRA） at a coking plant site was compared. By DRA, Hazard Quotient （HQ） following exposure to Naphthalene （Nap） and Incremental Life Cancer Risk （ILCR） following exposure to Benzo（a）pyrene （Bap） were 1.87 and 2.12 × 104. PRA revealed valuable information regarding the possible distribution of risk, and risk estimates of DRA located at the 99.59th and 99.76th percentiles in the risk outputs of PRA, which indicated that DRA overestimated the risk. Cleanup levels corresponding acceptable HQ level of 1 and ILCR level of 104 were also calculated for both DRA and PRA. Nap and Bap cleanup levels were 192.85 and 0.14mg.kg-1 by DRA, which would result in only 0.25% and 0.06% of the exposed population to have a risk higher than the acceptable risk, according to the outputs of PRA. The application of PRA on cleanup levels derivation would lift the cleanup levels 1.9 times for Nap and 2.4 times for Bap than which derived by DRA. For this coking plant site, the remediation scale and cost will be reduced in a large portion once the method of PRA is used. Sensitivity analysis was done by calculating the contribution to variance for each exposure parameter and it was found that contaminant concentration in the soil （Cs）, exposure duration （ED）, total hours spent outdoor per day （ETout）, soil ingestion rate （IRs）, the air breathing rate （IRa） and bodyweight （BW） were the most important parameters for risk and cleanup levels calculations.     

希捷 新网络存储产品组合助力小型企业腾飞

正日前,希捷科技在京推出专门为小型企业设计的一套网络附加存储(NAS)解决方案产品组合。新的产品组合包括5款容量为2TB至30TB的NAS产品,性能完全可以满足多达50名员工的家庭办公室和小型企业的需要。希捷网络存储和网络存储     

泰利特推出全球最小3G蜂窝模块

全球高品质M2M（机器对机器）模块、增值服务和解决方案提供商泰利特无线通讯有限公司于近日推出了该公司最小的3G蜂窝模块UE866。该产品拥有强大可靠的固件,可与畅销产品GE866针脚兼容,可以从2G无缝迁移至3G。UE866采用了最新技术,具备长久可用性,构造极为紧凑,非常适合于车载信息服务应用。     

Windows API函数在Visual Basic中的应用

本文对Windows API函数在Vimml Basic中的使用方法进行了简明的论述，使用户能够轻松自如地访问操作系统以及声音设备等。     

携手合作伙伴 助力安防行业更好成长——访英特尔中国区嵌入式事业部产品经理徐民

随着物联网技术的发展,平安城市正从传统安防到平安城市大安防体系、数字城市、智慧城市方向发展,安防视频及相关数据量正以惊人的速度增长。如何对这些海量数据进行全面分析和挖掘,成为安防行业关注的热点。而针对大数据这一问题,英特尔也给出了自己的答案,即端到端解决方案。那么究竟何为端到端?英特尔在方案设计中扮演怎样一个角色?又会为合作伙伴带来哪些价值体现?带着这些问题,本刊采访到英特尔中国区嵌入式事业部产品经理徐民。     

基于WebGIS的防灾信息网络发布系统

随着防灾研究的进展,提出了防灾信息发布的迫切要求。通过分析WebGIS技术功能,提出了用ASP结合ActiveX控件技术实现防灾信息网络发布的方案。结合唐山市灾害特点,探讨了唐山市防灾信息发布系统的体系结构、实现方法,分析了网络HTTP协议与Session对象的使用,及系统ASP应用程序开发等。开发了客户端应用程序,实现了防灾信息的实时发布与客户端的实时浏览。最后根据应用情况得出了几点结论,分析了系统在应用中尚存在的不足之处,为防灾信息的数据共享和网络发布系统开发提出了几点建议。     

袖珍计算器在实验室质控中的应用程序

1 剔除离群值、Grubbs检验1.1 数学模型:见《环境水质监测质量保证手册》(以下简称手册)P240.1.2 程序及应用1.2.1 f_x—3600P程序     

矿井通风系统优化调节研究

采用"征求专家评议法"和"相对重要性序列法"确定矿井通风系统的评价指标及其权值,并用多级模糊综合评判法对初拟的矿井通风系统改造方案进行解算,按照最大隶属度法确定最优解,找出最优的矿井通风系统改造方案.为便于分析计算,开发了相应的计算机应用程序,实现了智能化、系统化、信息化矿井通风管理,并以协庄煤矿为例进行了实际应用.     

微机在环境影响评价中的应用初探

原始数据通过ＢＡＳＩＣ程序的处理，可快速，直观地分析水环境质量状况。