Construction of risk management system for polluted sites in coal industry clusters.

Coal has always been the main source of energy in China, accounting for more than 60% of primary energy production and consumption. As a result of coal mining, coal industry agglomerations such as mining, coal chemical industry, and so on have been gradually formed, and there are many types of industries in the agglomerations, complex sources of pollutants, and sensitive soil and water environments, and all kinds of industrial sites and solid waste dumps of coal-related industries may pollute the soil and groundwater, and have a certain impact on the ecological environment. However, at present, there is a lack of a targeted region-wide pollution risk management technology system for the polluted sites in the agglomeration area, therefore, it is particularly important to construct a scientific and complete soil-groundwater risk management system and propose more targeted and effective control strategies for the polluted sites in the coal industry agglomeration area. Based on the domestic and international experience and historical data, this paper takes the coal industry cluster area as the research object classifies the land in the area according to the land use type into construction land, agricultural land, and another ecological land, and carries out the risk zoning and grading based on the dosage-effect model and the potential ecological hazard index method respectively, assesses the appropriateness, feasibility, and necessity of the implementation of risk control for the polluted plots, and then designs and develops a risk control decision-making framework by using the hierarchical analysis method. Hierarchical analysis was used to design and develop a decision-making framework for risk management, and finally, the optimal risk management and remediation strategy was proposed based on the AHP + TOPSIS algorithm, which combined with the contaminated land conditions to propose a suitable solution.