State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China.
Int J Environ Res Public Health. 2022 Mar 11;19(6):3304. doi: 10.3390/ijerph19063304.
Quantitative evaluation of different contaminated soil remediation technologies in multiple dimensions is beneficial for the optimization and comparative selection of technology. Ex situ thermal desorption is widely used in remediation of organic contaminated soil due to its excellent removal effect and short engineering period. In this study, a comprehensive evaluation method of soil remediation technology, covering 20 indicators in five dimensions, was developed. It includes the steps of constructing an indicator system, accounting for the indicator, normalization, determining weights by analytic hierarchy process, and comprehensive evaluation. Three ex situ thermal desorption technology-direct thermal desorption, indirect thermal desorption, and indirect thermal heap-in China were selected for the model validation. The results showed that the direct thermal desorption had the highest economic and social indicator scores of 0.068 and 0.028, respectively. The indirect thermal desorption had the highest technical and environmental indicator scores of 0.118 and 0.427, respectively. The indirect thermal heap had the highest resource indicator score of 0.175. With balanced performance in five dimensions, the indirect thermal desorption had the highest comprehensive score of 0.707, which is 1.6 and 1.4 times higher than the direct thermal desorption and indirect thermal heap, respectively. The comprehensive evaluation method analyzed and compared the characteristics of the ex situ thermal desorption technology from different perspectives, such as specific indicators, multiple dimensions, and single comprehensive values. It provided a novel evaluation approach for the sustainable development and application of soil remediation technology.
对不同污染土壤修复技术进行多维度的定量评价，有利于技术的优化和比选。异位热脱附因去除效果好、工程周期短，在有机污染土壤修复中得到了广泛应用。本研究构建了涵盖 5 个维度 20 个指标的土壤修复技术综合评价方法，包括指标体系构建、指标赋分、归一化处理、层次分析法确定权重和综合评价 5 个步骤。并以中国 3 种异位热脱附技术——直接热脱附、间接热脱附、间接热堆置——为例进行模型验证。结果表明，直接热脱附的经济和社会指标得分最高，分别为 0.068 和 0.028；间接热脱附的技术和环境指标得分最高，分别为 0.118 和 0.427；间接热堆置的资源指标得分最高，为 0.175。间接热脱附在 5 个维度的综合表现均衡，综合得分为 0.707，分别是直接热脱附和间接热堆置的 1.6 倍和 1.4 倍。综合评价方法从具体指标、多维度和单一综合值等方面对异位热脱附技术的特点进行了分析和比较，为土壤修复技术的可持续发展和应用提供了新的评价方法。
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