Pyrroloquinoline quinone (PQQ) is a fascinating small molecule that has garnered increasing attention in the fields of biochemistry and nutrition. It is a redox cofactor that plays a crucial role in various biological processes. Initially discovered as a cofactor in the enzymes of bacteria, PQQ has since been identified to have significant implications for human health, particularly in cellular energy metabolism, neuroprotection, and anti-aging effects.
Chemical precipitation is utilized to remove dissolved contaminants, particularly heavy metals such as lead, mercury, and cadmium. In this process, chemicals are added to the water that react with the dissolved metals to form solid precipitates. For instance, lime (calcium hydroxide) can be used to precipitate calcium phosphate and reduce phosphorus levels, which is crucial for controlling eutrophication in water bodies. After precipitation, the solids can be removed from the water through sedimentation or filtration.