Sustainable Mining and Metallurgy

Heavy metal chromium not only pollutes groundwater after entering the soil, but also accumulates in plants and endangers human health. Leaching technology has the advantages of simple operation, cost saving and remarkable effect. It is a commonly used treatment method for chromium contaminated soil. This paper summarized the current research on the leaching of chromium-contaminated soil, introduced the leaching principle, application and existing problems of various eluents, and analyzed the factors affecting the leaching effect, such as soil properties, eluent properties, eluent pH value, leaching time, liquid-solid ratio and enhancement methods. It was pointed out that the leaching of chromium-contaminated soil has problems such as low efficiency of chromium leaching in cohesive soil, insufficient ecological risk assessment of soil after leaching, and insufficient treatment and resource utilization of leaching wastewater. In the future, it is necessary to strengthen the research on these problems.