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由国家环境保护总局、大连市政府共同主办的2000年中国国际博览会于9月6日~9日在大连星海会展中心举行。本次博览会是国内环保行业级别最高的展会,来自海内外300余家企业参展,展会占地面积1.2万m~2。海外展团有来自美国、加拿大、日本、德国、法国、奥地利、俄罗斯等国家和我国香港、台湾地区的商会、科研机构、企业;国内展团有 相似文献
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前不久,加拿大驻华大使馆主持举办了2004中国和加拿大资源再生高级研讨会。来自中国国家发展与改革委员会、中国财政部、国家环保总局、世界著名稀有金属开采和冶炼公司——Noranda公司、加拿大协德技术公司、欧盟和美国国家环保署电子废弃法规专家以及中国大型电器生产企业代表等参加了会议。 相似文献
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为期4天的第二届中国国际废弃物资源化与环保技术设备展览会于1998年11月22日在北京展览馆落下帷幕。本届展览会是由中国环境科学学会和中国贸促会北京分会主办,并得到国家环保总局、建设部以及航天、石油天然气、石化、核工业等总(集团)公司环保部门的支持。展览会旨在发展我国的环境保护事业,提高资源综合利用水平,引进外国先进的环保技术和设备,加强国际间的交流与合作。来自美国、瑞士、加拿大、中国等国的百余家中外厂商参展。展示内容包括资源综合利用技术与设备;尾矿、粉煤灰、建筑垃圾、工业废渣回收利用技术与设备… 相似文献
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《环境导报》1994,(5)
中国经济发展迅速,对外开放程度日见提高,恢复关贸总协定缔约国地位指日可待。在这大好形势下,国外众多企业都在积极拓展中国市场,中国企业亦要走向国际化经营。中网国际集团顺应这种形势,为中外企业架建桥梁,发挥外引内联、招商引资的作用。 中网国际集团很高兴通过《中网信息》与国内工商企业界交流协作、共同发展。《中网信息》双月出版,免费赠阅,提供高新技术、投资、市场、供求及政策等各类信息。 中网国际集团的联营公司分设于荷兰、加拿大、香港、北京和南京,在上海设有联络办事处,各自在不同地区建立业务网络。荷兰中网公司位于鹿特丹市,负责欧洲业务;加拿大中网公司位于温哥华市,负责北美洲业务;香港中网公司肩负发展亚洲业务,同时结合荷兰和加拿大的中网公司为中国工商企业界架建跨国桥梁;北京中网通用信息技术有限公司和南京中网科技实业有限公司,则是中网国际集团的合资公司。 相似文献
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张哲 《资源节约和综合利用》2012,(9):53-53
近日,由加拿大人文与社会科学基金会(Canadian Federation for the Humanities and Social Sciences)主办的2012年加拿大人文社会科学年会落下帷幕。会上,加拿大总督戴维·琼斯顿(David Johnston)在致辞中提出:"伴随着技术革新,人文社科学界要带头推动社会革新。"此前,加拿大与英国签署了"加拿大、英国联合革新声明"(Canada/UK Joint Innovation Statement)。"社会革新"(social innovation)成为加拿大学术界关注的问题。来自加拿大人文社会科学各领域的70家顶尖研究团队, 相似文献
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Paul Ney 《Die Naturwissenschaften》1981,68(12):597-605
Types of asbestos are distinguished not only by structure, chemical compositon, shape of aggregates, and length and quality of fibers, but also by its formation. Though consisting of quite common elements, deposits are formed only under very special conditions. Its unique combination of properties has created over 3000 fields of application (about 70% in asbestos cement). Great efforts have been made to substitute all types of asbestos by harmless, similarly cheap and versatile synthetic fibers, owing to the unquestioned carcinogenic properties of all asbestos dusts. However, development of such fibers has not made any remarkable progress until recently. Consequently risk to workers in mining and manufactoring, consumers, outsiders, and the environment should be kept as low as possible by intensifying precautions and diminishing emissions. 相似文献
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This work was conducted to evaluate whether Ca-bearing additives used during coal combustion can also help with the retention of some other elements. This work was focused on the evaluation of bottom ashes collected during four full-scale combustion tests at an operating thermal fluidized-bed power station. Bottom ashes were preferred to fly ashes for the study to avoid interference from condensation processes usually occurring in the post-combustion zone. This work focused on the behaviors of S, Cl, Br, As, Mn, V, Cr, Ni, Cu,Zn, W, and Pb. Strong positive correlations with CaO content in bottom ashes were observed(for all four combustion tests) for S, As, Cl and Br(R = 0.917-0.999). Strong inverse proportionality was calculated between the contents of Pb, Zn, Ni, Cr and Mn and CaO, so these elements showed association to materials other than Ca-bearing compounds(e.g., to aluminosilicates, organic matter, etc.). Somewhat unclear behaviors were observed for W, Cu, and V. Their correlation coefficients were evaluated as statistically "not significant", i.e., these elements were not thought to be significantly associated with CaO. It was also discovered that major enrichment of CaO in the finest bottom ash fractions could be advantageously used for simple separation of elements strongly associated with these fractions, mainly S and As, but also Cl or Br. Removal of5% of the finest ash particles brings about a decrease in As concentration down to 77%-80% of its original bulk ash content, which can be conveniently used e.g., when high As content complicates further ash utilization. 相似文献
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珊瑚钨锡矿硅质尾矿中Cd、As、Zn、F富集迁移及环境污染 总被引:1,自引:0,他引:1
硅质尾矿在释放中性矿山废水(NMD)时所伴生的多元素复合污染问题值得重视。本文以桂东北珊瑚矿尾矿作为研究对象,通过分析该尾矿的组构、元素富集及迁移特性,筛选出主要污染元素,并探讨尾矿胶结层对元素富集迁移的影响。结果表明:(1)该尾矿中Cd、As、Zn及F富集程度较高、可交换态含量(易迁移释放量)较大,是主要的污染元素,而Cu、Pb、Tl产生污染的可能性较小;(2)胶结层对重金属具有再富集作用,但其对可交换态Cd、As(Tl)再富集明显,而对可交换态Cu、Pb、Zn再富集则不明显。胶结层中次生伊利石、石膏等胶结物趋向于吸附富集活性可交换态Cd、As。这表明该尾矿可能迁移释放出含Cd、As浓度较高的NMD。研究表明,硅质尾矿风化释出NMD的同时,可能伴生Cd、As、Zn等重金属以及F的复合污染。 相似文献
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Kurunthachalam Kannan Simonetta Corsoline Takashi Imagaws Silvano Focardi John P.Giesy 《Ambio-人类环境杂志》2002,31(3):207-211
我们曾对从意大利收集的金枪鱼、箭鱼、普通鸬鹚以及家燕体内的p,p'-DDE、多氯联苯同类物(PCBs)、多氯二苯-p-二恶英(PCDDs)、多氯二苯并呋喃(PCDFs)以及多氯萘(PCNs)浓度进行过测量. 相似文献
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Vine Edward L. Sathaye Jayant A. 《Mitigation and Adaptation Strategies for Global Change》2000,5(2):189-216
In this paper, we present an overview of guidelinesdeveloped for the monitoring, evaluation, reporting,verification, and certification (MERVC) ofenergy-efficiency projects for climate changemitigation. The monitoring and evaluation ofenergy-efficiency projects is needed to determine moreaccurately their impact on greenhouse gas (GHG)emissions and other attributes, and to ensure that theglobal climate is protected and that countryobligations are met. Reporting, verification andcertification will be needed for addressing therequirements of the Kyoto Protocol. While the cost ofmonitoring and evaluation of energy-efficiencyprojects is expected to be about 5–10% of a project'sbudget, the actual cost of monitoring and evaluationwill vary depending on many factors, including thelevel of precision required for measuring energy andGHG reductions, type of project, and amount of fundingavailable. 相似文献
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G. Vollmer 《Die Naturwissenschaften》1991,78(12):533-542
In order to say something substantial about the fundamental limits of machines (especially of computers) and of human calculations, we must explicate the concept of algorithm. Such an explication is provided by the Turing machine. Thus, problems have been discovered which cannot be solved algorithmically. For other problems there are problem-solving procedures, but no elegant algorithms. That men are fundamentally superior to machines has not been shown as yet. 相似文献
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《Journal of Cleaner Production》2006,14(17):1557-1558