Frascari D, Bronzini F, Giordano G, Tedioli G, Nocentini M
Department of Chemical and Mining Engineering and Environmental Technologies, University of Bologna, Via Terracini 34, Bologna 40131, Italy.
Chemosphere. 2004 Jan;54(3):335-43. doi: 10.1016/j.chemosphere.2003.08.013.
The elaboration of 10 years of monitoring of leachate quality and quantity, leachate treatment and degree of contamination of soil and surface waters at the Tre Monti site--an active, 4-million-m(3) landfill in Northern Italy--is presented in this study. A hydrological model of leachate production is applied, with a good match of the experimental data. The concentrations of all leachate components except sulfate are characterized by fluctuations over a constant or increasing value. Different ways of interpreting leachate quality data are discussed; the elaboration indicates that the pollutant load on the leachate treatment facility will remain basically constant as long as waste will be added to the landfill. The analysis of the data relative to 10 years of leachate pre-treatment in the adjoining, non-aerated lagoon system indicates that a significant removal is achieved for most leachate components; the operational conditions of the plant are described, and the removal mechanisms are discussed. Finally, the potential for contamination of soil and surface waters is examined by analyzing long-term quality trends of the sub-superficial waters sampled near the lagoons and by means of an analytical campaign conducted on clay cores sampled near and underneath the treatment ponds. The experimental values indicate that the clay layer located under the entire site offers an effective barrier to the migration of leachate contaminants.
本研究阐述了在意大利北部一个活跃的、容量为400万立方米的特雷蒙蒂垃圾填埋场，对渗滤液质量和数量、渗滤液处理以及土壤和地表水的污染程度进行的10年监测情况。应用了渗滤液产生的水文模型，实验数据与之匹配良好。除硫酸盐外，所有渗滤液成分的浓度都呈现出在恒定值或上升值基础上的波动。讨论了对渗滤液质量数据的不同解读方式；详细分析表明，只要继续向垃圾填埋场添加废物，渗滤液处理设施的污染物负荷将基本保持恒定。对相邻非曝气泻湖系统中10年渗滤液预处理数据的分析表明，大多数渗滤液成分都实现了显著去除；描述了该处理厂的运行条件，并讨论了去除机制。最后，通过分析泻湖附近采集的次表层水的长期质量趋势，以及对处理池附近和下方采集的粘土芯进行的分析活动，研究了土壤和地表水的潜在污染情况。实验值表明，整个场地下方的粘土层对渗滤液污染物的迁移提供了有效的屏障。
