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Environmental Risk Control of the Waste Disposal in Landfills

垃圾填埋场废物处置环境风险控制

基本信息

批准号：
14205068
负责人：
KAMON Masashi
金额：
$ 32.28万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

The main objective of this study is to establish a series of strategies for controlling the environmental risk related to waste disposal in landfill site during the period from its construction to abolition or landfill utilization. The main results obtained in this study can be summarized as follows :1.Fate and transport of pollutants in subsurface were analyzed by the laboratory experiments. Heavy metals and volatile organic compounds (particularly Dense Non-Aqueous Phase Liquids) are of main concern in this research. Effect of microbial activities on the mobility of heavy metals in land-fills and their interactions with bottom clay layer were mainly examined through laboratory batch and column leaching tests. Mobility of heavy metals is reduced when low ORP condition is induced by the microbial activities. In addition, acid buffering capacity of clay layer is proved to greatly contribute to the immobility of heavy metals.2.Performance of waste sludge as landfill cover layer was evalu … More ated through a series of laboratory experiments on its water retention property and air permeability. Numerical analyses were conducted to verify its applicability from the viewpoints of water balance and landfillgas collection.3.Chemical compatibilities of geosynthetics used as landfill lining materials, such as geosynthetic clay liner(GCL) and geomembrane, were evaluated to verify their in-situ hydraulic barrier performance. Particularly, hydraulic conductivity values of GCL permeated with inorganic solutions or landfill leachate were investigated considering the effect of prehydration of GCL.4.A case study of environmental risk assessment is conducted to verify the effectiveness of the remedial action for the illegal dumping of wastes containing dioxins and PCBs with regard to reduction of human health risks. The scheme for environmental risk control of waste disposal, including the geotechnical utilization of landfill after its abolition, is proposed based on the achievements of this study. Less

本研究的主要目的是建立一系列策略，以控制垃圾填埋场从建设到废弃或填埋利用期间的废物处理相关的环境风险。本研究得到的主要结果可以总结如下：1。通过室内实验分析了污染物在地下的归宿和运移。重金属和挥发性有机化合物（特别是致密的非水相液体）是这方面研究的重点。主要通过室内批浸和柱浸试验研究了微生物活动对填埋场重金属迁移的影响及其与底层粘土层的相互作用。微生物活动诱导的低ORP条件降低了重金属的迁移率。此外，粘土层的酸缓冲能力对重金属的不动性起着重要作用。通过一系列室内保水性和透气性试验，对废污泥作为填埋场覆盖层的性能进行了评价。从水平衡和垃圾填埋气体收集的角度对其适用性进行了数值分析。通过对土工合成材料（土工合成粘土衬垫和土工膜）的化学相容性评价，验证了土工合成材料的原位水力屏障性能。特别研究了无机溶液和垃圾渗滤液对氯化铜渗透的影响，考察了氯化铜预水化的影响。为验证非法倾倒含二恶英和多氯联苯废物的补救行动在减少人类健康风险方面的有效性，开展了环境风险评估案例研究。根据研究成果，提出了垃圾处置的环境风险控制方案，包括废弃后填埋场的岩土工程利用。少