**2.6.2 Elimination of inorganics**

Other than the organic chemical compounds mentioned above, a variety of inorganic compounds are sensitive to photochemical conversion on the catalyst surfaces. Inorganics such as chlorate and bromate (Mills et al., 1996), azide, halide ions, nitric oxide (NO), palladium (Pd) and rhodium (Rh) species, and sulphur species can be broken down (Michael et al., 1995). Metal salts like silver nitrate (AgNO3), mercury (II) chloride (HgCl) and organometallic materials can be eliminated from water (Bhatkande et al., 2001), as well as cyanide (CN), thiocyanate (SCN-), ammonia (NH3), nitrates (NO3-) and nitrites (NO2-) (Blake, 2001).
