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11.
Urban Metal Management The Example of Lead 总被引:1,自引:0,他引:1
The metal metabolism of an urban region, the City ofVienna, was investigated to discuss urban metal management strategies in view of environmental protection and resource conservation. About 90% of the metal stock is located in Vienna's buildings and infrastructure, whilst only 10% is in the landfills. The city stock represents a potential source for diffusive emissions. However, the control of the current environmental policy concentrates mainly on landfill emissions. Diffusive emissions resulting from the losses over the use of metal containing goods in the city are widely dispersed and cannot be easily controlled due to numerous non-point sources. First investigations indicate that for certain applications, the diffusive stock emissions are as significant as other sources. At present, Vienna's known diffusive and point source lead emissions into air and water are about 40 to 50 times higher than comparable past loadings from geogenic Vienna. Furthermore, a life cycle approach from acid car batteries indicates that sustainable lead management should consider flows and stocks in the hinterland of the city too. The city metal stock also represents a potential resource. Leaded water pipes built-in in Vienna's city stock have the potential to produce 1.6 million traditional car batteries. In future such city mining strategies can partly replace ore mining. 相似文献
12.
湖北省港口物流体系的空间分析 总被引:2,自引:0,他引:2
从系统论角度,以港口空间结构为切入点,采用定性与定量相结合的方法,研究了湖北省港口物流发展的集、疏、运条件。分析了湖北省港口物流腹地经济的水平与规模、港口物流体系的空间结构,提出了湖北省港口物流空间布局构想。 相似文献
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