Which method is NOT usually a part of chemical precipitation?

In the context of chemical precipitation, the primary goal is to remove unwanted substances from water by transforming them into solid forms that can be easily separated from the liquid. This process typically involves three main steps: adding a precipitating agent, allowing the formed solids to settle out of the solution, and then filtering the remaining liquid to ensure that the precipitate is completely removed.

The process of bioremediation, however, is not a part of chemical precipitation. Bioremediation utilizes biological organisms, such as bacteria and plants, to break down or remove contaminants, which differ fundamentally from the chemical processes involved in precipitation. Chemical precipitation relies on inorganic chemical reactions and physical processes to achieve its objectives, rather than biological activity.

This distinction highlights the unique nature of bioremediation as a separate treatment method, which is focused on utilizing living organisms to clean up contaminated water or soil, contrasting with the purely chemical and physical approach of chemical precipitation.