废电子电器回收处理体系研究

分析了废电子电器回收处理体系的问题，提出了一种适合我国国情的废电子电器回收处理体系模式，并对国家对废电子电器回收处理体系的支持问题进行了讨论。     

废汽车尾气三元催化剂的回收利用研究进展

随着汽车行业的迅猛发展,中国的废汽车尾气三元催化剂(TWCs)产生量将越来越大。由于废汽车尾气TWCs中富含铂、钯、铑等铂族贵金属,对其的不合理回收和提炼,不仅导致稀缺贵金属资源的流失,还会造成严重的环境污染。从废汽车尾气TWCs的回收政策、回收体系和回收技术3个层面,分析了国内外相关国家的最新进展,指明了中国在废汽车尾气TWCs回收过程中亟待解决的问题,最后还提出了应对建议。     

废印刷线路板回收利用的现状与存在的问题

从分析印刷线路板材料构成的复杂性人手,论述了国内外在废印刷线路板回收处理技术方面的研究现状和进展。找出目前我国在处理废印刷线路板方面存在的问题与差距．并提出切实可行的建议。分析表明,干法分离分选技术应是今后的发展方向。     

废旧家用电器回收利用及处理处置技术

随着大量家用电器进入报废期,废旧家用电器的资源化回收利用成为一个新的环境问题。介绍了国内外废旧家电的回收利用状况、处理方法和工艺流程,重点介绍了废印刷线路板的处理工艺和废塑料的再生利用,并针对我国的实际问题提出了相应的措施和办法。     

电解液循环对废手机线路板碱性矿浆电解回收的影响

针对废手机线路板碱性矿浆电解资源化过程中电解液带来的污染问题,采用氨-氯化铵碱性矿浆电解液循环回收废手机线路板中金属,以降低能耗、减少污染.研究了氨-氯化铵碱性矿浆电解体系从废手机板制备阴极铜的过程中,电解液循环对Cu的回收率、电流效率、Cu纯度以及Cu和Ni、Zn、Pb等金属迁移转化的影响.经过7次电解液循环实验,结...     

基于静电吸附技术对废润滑油净化再生

环保而有效的废润滑油净化再生技术是解决环境污染和能源短缺的有效途径。介绍了目前各种废润滑油处理工艺的优势与不足,并利用了基于静电吸附技术的再生工艺对工业用齿轮油进行了净化再生回收。针对静电吸附装置处理废润滑油的处理要求和纳污能力,采用真空脱水处理与三级并联式循环过滤处理方式。整个处理过程在密闭装置下进行,避免了油液再次受到污染的可能。实验证明,经多级过滤和静电吸附技术处理后,齿轮油的污染等级由NAS10下降到NAS7。通过对废齿轮油处理前后含有的主要元素和性能指标进行检测,废润滑油中的主要污染元素有效地减少,并且润滑油性能有所改善,说明该技术的应用能够有效的处理废润滑油中的污物,处理后的废润滑油已经达到了再次循环利用的标准。     

废铅酸蓄电池的环境管理

简要分析了我国废铅酸蓄电池的回收和再利用的现状、技术水平以及在管理中存在的问题，提出了对废铅酸蓄电池在环境管理方面的建议和对策。     

重铬酸钾法测定COD的废液处理和综合利用

将重铬酸钾法测定COD的废液，通过采用还原、中和等措施，进行处理和有用物质的回收，既减少了环境的污染，又回收了资源，具有经济和环境的双重效益。     

废印刷电路板回收利用探讨

通过对废印刷电路板的结构和物质组成的分析,并对可能的各种回收利用的方法及其原理进行了分析和对比,从而得出二次污染小且成本低的回收利用的方法和原则流程,为废印刷电路板的回收利用提出了一个方向性的建议.     

国外动态

快速回收有色金属美国汉密尔顿的一家金属回收公司,已发明了一种可从破废汽车快速回收有色金属的新方法。工作流程仅八小时,可加工处理1000辆汽车的破碎材料,并进而回收锌、铝、铜和不锈钢。这些金属材料在以前是被废弃的。     

我国电子废弃物管理与资源化对策

电子废弃物对人类环境的影响,已成为全球化的问题。通过对发达国家关于电子废弃物管理以及资源化技术的进展回顾,针对我国目前的情况提出相应的对策:制定延伸生产者责任以及有害物质的停用限期的相应法规;建立电子废弃物回收网络体系;通过国家政策和经济的扶持,尽快建立专门处理电子废弃物的机构;加快我国电子废弃物处理技术的步伐,尽快提高现有工艺及设备。     

Evolutionary game analysis of WEEE recycling tripartite stakeholders under variable subsidies and processing fees

Environmental Science and Pollution Research - The standardization of formal recycling and rational subsidy plays an important role in waste electrical and electronic equipment recycling. In order...     

Characterisation of polymer fractions from waste electrical and electronic equipment (WEEE) and implications for waste management

There is an increasing interest in the end-of-life management of polymers present in waste electrical and electronic equipment (WEEE). This is mainly due to high recycling and recovery quotas set by the European WEEE directive, which can only be fulfilled by including the plastic fraction in recycling and recovery approaches. Previous studies identified a high material diversity and various contaminants in WEEE plastics, including heavy metals, polybrominated biphenyls (PBB), diphenyl ethers (PBDE), as well as polybrominated dibenzodioxins and dibenzofurans (PBDD/F). These substances are regulated by European directives that limit their levels in marketable products. Consequently, both material diversity and contaminants are strong arguments against material recycling and point to hazardous waste treatment. However, recent developments in the production of flame retardants and electrical and electronic goods aimed to reduce contaminants and material diversity. Thus, the present study summarises updated contaminant levels of plastic fractions of European WEEE, as well as data on materials in waste housing polymers. Material characterisation revealed housing fractions to be interesting sources for polymer recycling, which however has to implement potent material separation and/or bromine elimination techniques. With respect to contaminants, our data indicate an effective phase-out of PBB, but still high levels of PBDE and PBDD/F are found. Sources and implications for the material recycling and thermal recovery approaches are discussed in detail.     

Integrated bioleaching of copper metal from waste printed circuit board—a comprehensive review of approaches and challenges

Waste electrical and electronic equipment (e-waste) is the most rapidly growing waste stream in the world, and the majority of the residues are openly disposed of in developing countries. Waste printed circuit boards (WPCBs) make up the major portion of e-waste, and their informal recycling can cause environmental pollution and health risks. Furthermore, the conventional disposal and recycling techniques—mechanical treatments used to recover valuable metals, including copper—are not sustainable in the long term. Chemical leaching is rapid and efficient but causes secondary pollution. Bioleaching is a promising approach, eco-friendly and economically feasible, but it is slower process. This review considers the recycling potential of microbes and suggests an integrated bioleaching approach for Cu extraction and recovery from WPCBs. The proposed recycling system should be more effective, efficient and both technically and economically feasible.     

Present status of recycling waste mobile phones in China: a review

A large number of waste mobile phones have already been generated and are being generated. Various countries around the world have all been positively exploring the way of recycling and reuse when facing such a large amount of waste mobile phones. In some countries, processing waste mobile phones has been forming a complete industrial chain, which can not only recycle waste mobile phones to reduce their negative influence on the environment but also turn waste into treasure to acquire economic benefits dramatically. However, the situation of recycling waste mobile phones in China is not going well. Waste mobile phones are not formally covered by existing regulations and policies for the waste electric and electronic equipment in China. In order to explore an appropriate system to recover waste mobile phones, the mobile phone production and the amount of waste mobile phones are introduced in this paper, and status of waste mobile phones recycling is described; then, the disposal technology of electronic waste that would be most likely to be used for processing of electronic waste in industrial applications in the near future is reviewed. Finally, rationalization proposals are put forward based on the current recovery status of waste mobile phones for the purpose of promoting the development of recycling waste mobile phones in developing countries with a special emphasis on China.     

Status of electronic waste recycling techniques: a review

Environmental Science and Pollution Research - The increasing use of electrical and electronic equipment leads to a huge generation of electronic waste (e-waste). It is the fastest growing waste...     

Environmental issues and management strategies for waste electronic and electrical equipment

Issues surrounding the impact and management of discarded or waste electronic and electrical equipment (WEEE) have received increasing attention in recent years. This attention stems from the growing quantity and diversity of electronic and electrical equipment (EEE) used by modern society, the increasingly rapid turnover of EEE with the accompanying burden on the waste stream, and the occurrence of toxic chemicals in many EEE components that can pose a risk to human and environmental health if improperly managed. In addition, public awareness of the WEEE or "e-waste" dilemma has grown in light of popular press features on events such as the transition to digital television and the exportation of WEEE from the United States and other developed countries to Africa, China, and India, where WEEE has often not been managed in a safe manner (e.g., processed with proper safety precautions, disposed of in a sanitary landfill, combusted with proper air quality procedures). This paper critically reviews current published information on the subject of WEEE. The definition, magnitude, and characteristics of this waste stream are summarized, including a detailed review of the chemicals of concern associated with different components and how this has changed and continues to evolve over time. Current and evolving management practices are described (e.g., reuse, recycling, incineration, landfilling). This review discusses the role of regulation and policies developed by governments, institutions, and product manufacturers and how these initiatives are shaping current and future management practices.     

电子与电器废弃物资源化处理技术

当今世界电子、电器工业快速发展,层出不穷的技术创新与持续膨胀的市场需求加速了电子与电器设备的更新换代,产生了大量的电子与电器废弃物(WEEE).鉴于WEEE所带来的严重的环境问题及其所含有的金属、贵金属、塑料及玻璃等高利用价值的材料,对WEEE进行资源化再循环处理已成为人们关注的热点.WEEE组成材料在密度、铁磁性、导电性等物理性质方面的较大差异使采用环境友好的机械物理方法对其进行资源化再循环处理成为可能.就WEEE拆解及其所含物质机械物理分离研究进展进行了综述.     

WEEE closed-loop supply chain network management considering the damage levels of returned products

Environmental Science and Pollution Research - Due to economic, social, and environmental concerns, managing waste electrical and electronic equipment (WEEE) has become an important research area....     

Effect of brominated flame retardant on the pyrolysis products of polymers originating in WEEE

Environmental Science and Pollution Research - Chemical recycling is an environmentally friendly method, which is often used for the recycling of plastics included in waste electric and electronic...