3. In-Situ Remedies

The chapter delves into in-situ remedies for mine drainage, with a focus on in-pit treatments that utilize alkaline amendments to neutralize contaminants and reduce remediation costs. It explores various amendment materials such as Bayer precipitates, agri-food waste, and earth minerals, highlighting their efficacy in metal(loid) removal. The text also discusses the optimization of amendment mix ratios, particle sizes, and thermal and chemical modifications to enhance remediation processes. Furthermore, it summarizes the performance of different amendments in tables and discusses the potential for resource recovery through selective precipitation and hydrotalcite formation. Additionally, the chapter touches on bioremediation and mixed treatments, showcasing the versatility of in-pit remedies. The text concludes by emphasizing the need for further research into waste materials and their modifications for effective neutralization and resource recovery in mine drainage treatment.