Progress and Challenges of Biological Leaching of Heavy Metal in Coal Ash from a Power Plant

Bioleaching is a technique for reducing the heavy metal content of coal ash by using bacteria, fungi, or yeast. Previous studies in bioleaching discussed factors affecting process, but as yet there little information on challenges microorganisms. Therefore, this study aimed to obtain comprehensive regarding use microorganisms bioleaching. Heavy concentrations are low, and metals diverse. The components complexes that cannot leach certain according previous studies. These low complex make it difficult investigate mechanism. combination biological chemical interactions involves various system. high concentration iron leached could be toxic process influenced several factors, such particle size, pH, pulp density. Most have been conducted small scale control conditions process. kinetics liquid-solid reaction can represented shrinking core model, which was mainly used study.