For example, a research study conducted by the School of Industrial Technology, University Sains Malaysia in 2010 found that chitosan coated with poly 3-methyl thiophene can be effectively employed for removal of hexavalent chromium ions from aqueous solutions. Chitosan is a very cheap, economical, and environmentally friendly substrate for coating of this polymer. Adsorption of chromium(VI) is found to be effective in the lower pH range and at higher temperatures and subsequent desorption is readily achieved upon alkaline treatment of the adsorbent.[18] Another study done by the American Industrial Hygiene Association indicates that the airborne hexavalent chromium in acidic mists of an electroplating tank collected on PVC filters was reduced over time after mist generation.[19] A number of other emerging technologies for removing chromium from water are also currently under research, including the use of cationic metal-organic frameworks to selectively adsorb chromium oxyanions.[20]