环境经济系统物质流可持续性与循环经济物质流特征分析--《资源科学》2008年09期

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环境经济系统物质流可持续性与循环经济物质流特征分析

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【摘要】:目前物质流分析的理论研究明显滞后于实证方法。本文借助物质流分析原理和循环经济理论,建立了环境经济系统及循环经济系统的物质流分析模型,并利用模型中各段物质流之间的质量平衡关系,讨论了满足环境经济系统界面可持续约束条件下经济系统内部物质流动必须遵循的若干基本规律。通过对模型的解析研究,在物质运动规律分析的基础上论证得到以下结论:①满足环境经济系统界面可持续约束条件是实现经济系统物质流动可持续的基础;②为实现经济系统物质流的可持续,必须通过减少经济系统对环境系统稀缺性资源的消耗速率并同时降低经济系统对环境系统的废弃物排放速率有可能实现;③以往过分依赖于经济系统末端的残余物处理达到改善特定区域范围某一环境要素的局部环境质量的做法,只会加剧或导致经济系统的稀缺性资源输入及废弃物输出这两种物质流的不可持续;④实现环境经济系统之间可持续的物质流动,既取决于生产过程也取决于消费过程,二者缺一不可;⑤循环经济核心原则至少应增加Raise原则(即提高生产过程的物质累积在其整个物质产品结构中的比例,以及增加消费过程总物质输入在消费过程中的物质累积比例)。水利论文 l5bi'h*K:r0X o%v.u

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Q'|(x]D1W6^0北京工商大学化学与环境工程学院;

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3h!o6B]6kv0环境经济系统 循环经济系统 物质流分析 质量平衡 可持续条件 物质流特征 R原则水利论文%Q:~4\s2f+e @ _B*A

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A;\M5[sh0物质流分析(Material Flow Analysis或SubstanceFlowAnalysis)观点认为,人类经济活动对自然环境造成的影响主要取决于进入经济系统的自然资源输入量和返回受纳环境的废弃物排放量,前者引发自然资源的耗竭,后者导致环境质量的恶化。物质流分析的理论基础是质量平衡原理,即在一

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