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首页> 外文期刊>Scientific reports. >Isolation distance between municipal solid waste landfills and drinking water wells for bacteria attenuation and safe drinking
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Isolation distance between municipal solid waste landfills and drinking water wells for bacteria attenuation and safe drinking

机译：城市固体废物垃圾填埋场的隔离距离和饮用水井进行细菌衰减和安全饮用

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Groundwater pollution and human health risks caused by leachate leakage have become a worldwide environmental problem, and the harm and influence of bacteria in leachate have received increased attention. Setting the isolation distance between landfill sites and groundwater isolation targets is particularly important. Firstly, the intensity model of pollutant leakage source and solute transport model were established for the isolation of pathogenic Escherichia coli. Then, the migration, removal and reduction of bacteria in the aerated zone and ground were simulated. Finally, the isolation distance was calculated based on the acceptable water quality limits, and the influence of hydrogeological arameters was analyzed based on the parameter uncertainty. The results of this study suggest that the isolation distances vary widely ranging from 106 m-5.46?km in sand aquifers, 292 m-13.5?km in gravel aquifers and 2.4-58.7?km in coarse gravel aquifers. The gradient change of groundwater from 0.001 to 0.05 resulted in the isolation distance at the highest gradient position being 2-30 times greater than that at the lowest gradient position. There was a difference in the influence of the thickness of the vadose zone. For example, under the same conditions, with the increase of the thickness of the aeration zone, the isolation distance will be reduced by 1.5-5 times, or under the same thickness of the aeration zone, the isolation distance will be significantly shortened. Accordingly, this needs to be determined based on specific safety isolation requirements. In conclusion, this research has important guiding significance for the environmental safety assessment technology of municipal solid waste landfill.
机译：由渗滤液泄漏引起的地下水污染和人类健康风险已成为全球环境问题，细菌在渗滤液中的危害和影响受到增加的关注。设置垃圾填埋场和地下水隔离目标之间的隔离距离尤为重要。首先，建立了污染物渗漏源和溶质传输模型的强度模型，用于分离病原体大肠杆菌。然后，模拟了空气区域和地面细菌的迁移，去除和减少。最后，基于可接受的水质限制计算隔离距离，基于参数不确定性分析水文地质植物的影响。本研究结果表明，隔离距离在砂含水层106 m-5.46 km中的差异范围广泛，砾石含水层292 m-13.5？km。粗砂含水层2.4-58.7 km。地下水的梯度变化从0.001〜0.05导致最高梯度位置的隔离距离，比在最低梯度位置的2-30倍。 Vadose区厚度的影响存在差异。例如，在相同的条件下，随着曝气区的厚度的增加，隔离距离将减少1.5-5次，或在相同的曝气区的厚度下，隔离距离将显着缩短。因此，需要基于特定的安全隔离要求来确定。总之，本研究对市政固体废物垃圾填埋场环境安全评估技术具有重要的指导意义。

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