Solubility is not to be confused with the ability to 'dissolve' a substance, because the solution might also occur because of a chemical reaction. For example, zinc 'dissolves' (with effervescence) in hydrochloric acid as a result of a chemical reaction releasing hydrogen gas in a displacement reaction.
All three kidney, liver and lungs purify the blood. The lungs help remove carbon dioxide, the kidneys remove water-soluble waste and the liver removes fat soluble wastes and many other impurities from the blood....ref:http://www.pharmainfo.net/answers/pharmaquestion/which-organ-purifies-blood.
The spleen also filters bacteria from the blood. The spleen removes old red blood cells. It breaks down the erythrocytes and recycles the hemoglobin, sending the heme portion to the liver for storage and recycling. The spleen also filters bacteria from the blood. The spleen removes old red blood cells.