Study on the mechanical and environmental properties of concrete containing cathode ray tube glass aggregate

Cathode ray tube (CRT) glass is considered a hazardous material due to its lead toxicity. In addition, current disposal practices are being phased out due to their adverse environmental impacts. In this project, CRT glass was used as a fine aggregate replacement in concrete. Life-cycle material characterization was conducted by evaluating the durability and strength of the CRT-Concrete. Leaching tests were also conducted to investigate whether the material meets drinking water limits for Pb. Test results show that the plastic state of the CRT-Concrete was affected by the angularity of the glass particles. Moreover, the compressive strength of CRT-Concrete met and exceeded that of the control specimen. However, CRT-Concrete was susceptible to expansive alkali-silica reactions when more than 10% CRT replacement was used. Environmental leaching results show that lead concentrations from CRT-Concrete are below the drinking water limits depending on the CRT volume replacement and if biopolymers are used.     

炉渣在锅炉湿法除尘废水处理中的应用

利用燃煤炉渣直接过滤处理锅炉湿法除尘废水 ,可以提高出水水质 ,对废水中 SS、CODcr和HSO4- 有显著去除效果 ,出水可以满足循环回用要求     

Can area managers connect policy and tenants? Implementation and diffusion of a new waste management system in Linköping,Sweden

Recycling and reducing household waste are political goals internationally, nationally and locally. In Sweden, households in apartment buildings seem to sort their waste to a lesser extent than households in single-family houses. This paper analyses the challenges of the diffusion of a new waste management system in apartment buildings, and focuses on a municipal housing company and the actions of its area managers. It is argued that area managers can be regarded as street-level bureaucrats who act as ‘collectors’ of tenants’ everyday practices in the studied implementation process. The study is based on interviews, document analysis and observations.     

Reuse of nickel recovered from spent Ni–Cd batteries for the preparation of C/Ni and C/Ni/Pd layered electrodes for energy sources

Nickel recovered in the recycling process of Ni–Cd batteries was used as a main component of bath for electrodeposition of nickel onto carbon fabric in order to obtain C/Ni composite. A part of the obtained composite was additionally coated with a thin layer of palladium (C/Ni/Pd composite). All the materials were investigated to assess the possibility of their use in the processes of electrochemical storage (sorption/desorption) of hydrogen and electrochemical oxidation of methanol. The obtained results showed the composites to be active electrode materials in these processes. The electrodes exhibited high activity and cyclability, especially in the process of methanol oxidation due to electrocatalytic activity of both nickel deposited onto carbon fabric and the outer layer of porous palladium coating nickel substrate.     

废弃印刷电路板回收拆解过程中的气体排放物分析

为研究废弃印刷电路板(PCB)在回收加热拆解电子元件过程中所产生的气体排放物的主要成分,使用自行设计的废弃PCB拆解装置进行拆解实验,采用傅里叶红外光谱(FTIRS)、气相色谱-质谱(GC/MS)、离子色谱(IC)和电感耦合等离子体质谱(ICP-MS)等分析方法,对实验过程所收集到的气体产物进行成分分析.结果表明,废弃PCB的基板在加热过程中发生了初步分解,基板上的溴化环氧树脂发生了O—C、C—C、C—Br键的断裂,产生了苯酚、2,6-二溴苯酚等有机物;伴随有机气体逸出的还有废弃PCB在加热过程所释放的含有大量S、N、Cl、Br等元素的无机酸性气体;而连续的熔锡过程还使得PCB与焊料中的Sn、Pb、Sb、Hg、Cd、Cr等重金属产生烟尘逸出.     

废旧金属回收熔炼辐射安全管理研究

介绍了一起废旧金属熔炼导致的放射性污染事件,以及环保部门在事件中采取的措施.反思了废旧金属回收熔炼辐射安全监管存在的问题,指出相关的法律法规不够明确,对熔炼企业辐射监测的监管力度不足,废金属进出口的放射性管理存在漏洞,熔炼企业缺乏辐射安全意识和手段,提出了完善标准体系,强化口岸监测,实施分级管理,加强企业辐射安全管理等对策措施.     

废旧电池的管理及处置研究

世界电池产量的一半来自中国内地,中国的电池消费能力居世界首位,废旧电池的随意丢弃和处置方式不当都会造成环境污染.中国的回收现状亟待改善,寻找安全科学的处理方法,使电池循环利用,有害物质无害化,并产生经济效益.调研了国内外废旧电池管理及处置现状,对处理废旧电池的成本、经济效益、环境效益、社会效益进行了阐述,总结了国内外废旧电池处理处置的法律法规现状,针对中国废旧电池处理过程中存在的问题提出相关建议,为对废旧电池的科学管理提供决策支持.     

“城市矿产”示范基地——我国再生资源产业化的发展方向

以前三批29个国家＂城市矿产＂示范基地为研究对象,对示范基地的回收利用规模、重点项目覆盖范围、示范基地类型做了概括性梳理,总结了示范基地建设的成功经验,分析了妨碍示范基地健康发展的问题,并提出一些预测性意见,供行业同仁参考。     

基于循环经济理念的煤炭型老工业基地振兴的研究与分析——华丰煤矿为例

华丰煤矿就其地理位置，资源条件和社会环境而言，发展循环经济有着独特优势。按照发展循环经济的要求，充分合理的开发利用资源是当前落实科学发展观所迫切需要解决的问题，发展循环经济需要市场机制与煤矿系统的双重作用，尤其离不开煤矿系统的推进。     

福州市海峡供销再生资源产业园区可行性研究

对建设福州市海峡供销再生资源产业园区项目的背景、内容、规模,以及园区开发经营和效益进行可行性分析研究。园区建设作为一个长期项目,将成为海峡西岸经济区重要的废旧商品回收利用示范基地。