clipped from: cleantechnica.com 
Catfish aren’t the only happy campers when it comes to the ultrasound treatment. Ultrasound can also remove mercury from sediment, and it could help get rid of pharmaceutical pollution in water supplies. Choosing Ibuprofen as a test case, an international team of ultrasonics researchers based in Switzerland demonstrated that a two-hour ultrasound treatment eliminated 98% of the drug.
Researchers at Ohio State University have found that ultrasound could remove one roadblock to the use of ceramic filters, which are being developed as an alternative to chemical water supply treatment. Composed of tiny channels separated by membrane, ceramic filters are fine enough to catch bacteria and viruses, but they eventually become clogged and need to be cleaned. Ultrasound could keep ceramic water filters clean while they are in operation, eliminating the expense and complications of off-line cleaning.