Washing biochar modified with minerals such as bentonite or diatomite can be a complex process, as it varies depending on the specific circumstances and desired outcome. However, certain general steps can be followed to ensure adequate washing of biochar and removal of minerals in the final step. These steps include preparation, initial rinse, decantation, filtration, and drying. It is important to note that the washing process may differ based on various factors, such as the type and amount of mineral used for modification, as well as the intended application of the modified biochar. Therefore, it is recommended to consult specific guidelines or protocols provided by experts or manufacturers for the best results.