Pollution remedy may cause pollution

The Baton Rouge Advocate reported that researchers at LSU have developed method of coating asphalt with crystalline titanium dioxide nanoparticles that may destroy several pollutants with the assistance of sunlight.   The particles act as a catalyst to oxidize pollutants such as sulfur dioxide and various oxides of nitrogen.  The article recognizes that the catalysts convert pollutants in the air into potential water pollutants.  However, the nutrient pollution that is recognized may not be the most concerning form of pollution.  The catalyst itself may be the pollutant of greatest concern.   As described in previous posts, the nanoparticles being applied are just on example of the exploding use of nanomaterials which have poorly understood environmental impacts.