Core Insights - Yunnan Provincial Ecological Environment Science Research Institute (referred to as the Institute) is a comprehensive environmental research institution established in 1976, focusing on ecological environment science research and technology application [1] - The Institute has developed in-situ risk control technology for historical smelting waste residue, successfully applied in over ten remediation projects, managing more than 20 million tons of waste residue [1][2] Project Overview - Gejiu City, known as the "World Tin Capital," faces significant challenges due to the disorderly accumulation of historical smelting waste, which poses serious risks to surrounding soil and water [2] - The Institute has created an innovative technology model centered on in-situ risk control to address the waste residue management challenges, providing robust technological support for sustainable regional ecological and economic development [2][5] Technical Features - The in-situ risk control technology model is designed based on local geological and hydrological conditions, offering strong operational feasibility, short remediation cycles, and minimal secondary pollution risks [3] Key Technical Modules - The project includes three core engineering modules: 1. Reshaping and enclosing waste piles to ensure stability [4] 2. Pollution barrier and surface runoff control to prevent dust and leachate [4] 3. Ecological restoration and functional reconstruction to enhance ecosystem stability [4] Project Advantages - The project leverages the Institute's strong research capabilities and integrates resources from enterprises and universities, achieving significant breakthroughs in technology innovation [5] - The in-situ risk control technology reduces high costs and long remediation periods, significantly improving remediation efficiency and providing a model for similar pollution management projects [5] Benefit Analysis - The project has effectively blocked the migration of heavy metals, transforming waste sites from pollution-dispersing to pollution-reducing, thus enhancing the safety of agricultural land and improving regional water quality [6] - It has preserved over 500,000 tons of potential metal resources, providing replicable practices for green transformation in resource-depleted cities and establishing a benchmark in the national waste residue management field [6]