建设用地安全再开发重金属污染风险阻控技术研究进展

场景差异和环境因素变化都可能导致修复后场地中重金属的再次活化,给建设用地再开发带来潜在环境风险.选择合适的风险阻控技术是保障重金属污染建设用地长期安全利用的关键.为推动风险阻控技术在我国的应用和发展,首先对现有适用于重金属污染场地风险阻控技术(物理阻隔和化学钝化)所使用功能材料及其作用机制进行了总结.其次,对不同阻控技...

RESEARCH PROGRESS OF HEAVY METAL POLLUTION RISK PREVENTION AND CONTROL TECHNOLOGIES FOR SAFE REDEVELOPMENT OF CONSTRUCTION LAND

The differences of development scenarios and the change of environmental conditions may lead to the re-release of heavy metals in the post-remediation sites, which brings potential environmental risks to the safe redevelopment of construction land. Choosing appropriate risk prevention and control technology is essential to ensure the long-term safe redevelopment of contaminated construction land. To promote its application and development in China, the materials and mechanisms of two types of risk prevention and control techniques, including physical containment and chemical stabilization, which were widely applied in the remediation of heavy metal contaminated sites were summarized. Then, the application cases of different risk prevention and control technologies in China and abroad were analyzed. Finally, the failure mechanisms of these two types of risk prevention and control technologies were discussed. Due to the high risk of heavy metal pollution and the high intensity of redevelopment in China's construction land, it was proposed that the study of green and sustainable risk prevention and control technologies should be focused on, and the establishment of long-term monitoring and retrospective evaluation system should be explored.