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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Can we decrease the ecological footprint of base metal production by recycling?
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Can we decrease the ecological footprint of base metal production by recycling?

机译：我们可以通过回收利用来减少贱金属生产的生态足迹吗？

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摘要

Sustainability and the environment arc important and topical themes currently. There is a generally growing awareness of resource consumption, possible resource depletion, and the polluting effects of indiscriminate dumping at the end of the useful life of an item, as well as of the pollution caused by producing items and making them available to the end user. The issues are complex and interlinked. In order to improve understanding, it is important to obtain holistic and quantitative perspectives. To help in quantification, concepts such as the ecological and carbon footprints have been defined and are in common use. This paper introduces the concept of a material footprint to help quantify the material resource usage in an item, in terms of globally available resources. It allows comparison of various items to one another in terms of their use of material resources. Thus the types of items available for recycling can be ranked to determine recycling priorities. The material footprint can also help in determining recycling priorities for the various materials in the items. Several examples are used as illustration. It is shown that recycling of printed circuit boards is especially worthwhile. Printed circuit boards are complex and heterogeneous from a materials recycling perspective. The paper describes the complexities of recycling these boards, but also points out the benefits. An overview is given of currently available metallurgical technologies for such recycling. It is shown that in these processes there are many factors that affect the environment. It thus remains difficult to determine the total impact of recycling on the environment holistically. Possibly some benefits are to be gained in the Southern African context by better integration between secondary material processors and primary metal producers.
机译：可持续性和环境是当前的重要主题。人们对资源消耗，可能的资源枯竭以及在物品使用寿命结束时乱扔垃圾的污染影响以及由生产物品并将其提供给最终用户造成的污染的认识日益普遍。这些问题既复杂又相互联系。为了增进理解，获得整体和定量的观点很重要。为了帮助量化，已经定义并广泛使用了诸如生态足迹和碳足迹之类的概念。本文介绍了物料足迹的概念，以帮助根据全球可用资源量化项目中的物料资源使用情况。它允许将各种项目在物质资源的使用方面进行比较。因此，可以对可用于回收的物品的类型进行排名以确定回收优先级。材料足迹还可以帮助确定项目中各种材料的回收优先级。几个示例用作说明。结果表明，回收印刷电路板特别值得。从材料回收的角度来看，印刷电路板是复杂且异构的。本文描述了回收这些板的复杂性，同时指出了其好处。概述了目前可用于此类回收的冶金技术。结果表明，在这些过程中，有许多因素会影响环境。因此，仍然难以整体确定回收对环境的总体影响。通过在二级材料加工商和初级金属生产商之间更好地整合，可能会在南部非洲获得一些好处。

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