Core Viewpoint - The article discusses new strategies for the treatment of nickel-gold slag generated in the electroplating industry, emphasizing the importance of efficient recycling and environmental protection in achieving sustainable development [1]. Group 1: Characteristics and Challenges of Nickel-Gold Slag - Nickel-gold slag is a complex industrial waste containing valuable metals like nickel and gold, along with organic additives and impurities, making direct extraction challenging [2]. - Improper handling of nickel-gold slag can lead to resource loss and environmental pollution due to heavy metal ion leakage [2]. Group 2: New Treatment Strategies for Nickel-Gold Slag - **Refined Classification and Pre-treatment**: Initial classification and characteristic analysis of nickel-gold slag can reduce subsequent processing burdens, enhancing metal recovery rates [3]. - **Optimization of Hydrometallurgical Techniques**: Selective leaching processes using specific solvents can effectively separate nickel and gold, allowing for high-purity metal recovery [4]. - **Exploration of Bioleaching and Green Chemistry**: Utilizing specific microorganisms for metal dissolution and developing non-toxic reagents can minimize environmental impact while improving extraction rates [5]. - **Integrated Processing and Full-Process Resource Utilization**: Combining various methods can address the complexities of waste treatment, with examples of successful practices from companies like Nanjing Xinyi Wang Recycling Co., Ltd. [6]. Group 3: Resource Utilization Benefits and Future Outlook - Effective treatment of nickel-gold slag not only reduces environmental pollution but also generates significant economic value, with estimates suggesting direct revenues exceeding tens of thousands of RMB per ton of slag processed [8]. - Future advancements in technology and circular economy policies are expected to drive the treatment of nickel-gold slag towards smarter and more refined methods, enhancing efficiency and resource recovery rates [8].