Abstract:
Land use and disposal is the main treatment method for general industrial solid waste. Pollutants are leached from solid waste and enter the soil and groundwater, which is the main transport pathway in solid waste land use and disposal scenarios. At present, the applicability of solid waste pollutant leaching intensity assessment methods is insufficient and there is often a phenomenon of over-assessment. This is not conducive to the refined prevention and control of the environmental risks of solid waste land utilization and disposal. Therefore, for the solid waste land utilization and disposal scenarios, we sorted out the solid waste pollutant leaching assessment methods and summarized the methods of pollutant transport in soil and groundwater. Based on the existing assessment methods or models, we proposed a framework for the leaching method of solid waste pollutants, which was divided into two stages and five main steps, including preliminary investigation, hazard judgment, detailed investigation, leaching modeling, and leaching concentration prediction. The implementation of the leaching method framework can form a fingerprint dataset of pollutant leaching characteristics of different solid wastes under different scenarios. It can be integrated with the soil and groundwater pollutant transport method to enhance the accuracy of risk assessment results for solid waste land use and disposal scenarios, thus laying a methodological foundation for accurate decision-making on solid waste land use and disposal. In the future, it is necessary to research the standardization of the assessment methods to further enhance the standardization and applicability of the pollutant leaching and transport assessment method framework for solid waste land use and disposal scenarios.