Electro precipitation
Electro precipitation is the removal of Heavy [metal (chemistry)|heavy metal] ions, charged colloids, emulsions and microorganisms by passing direct electric current through contaminated water. Since the targeted contaminants are primarily held in solution by electrical charges, the addition of ions having a charge opposite of the contaminants causes them to destabilize and aggregate into larger particles. This neutralization of the ions and colloids results in a precipitate.