modified gypsum mill
In the case of gypsum modified by the addition of 1 wt.% TiO 2 /N, the NOx removal amounted to 32% and dye discoloration occurred after 114 s. This is the lowest NOx removal and the longest discoloration time for all of the tested gypsum materials. As was expected, the highest activity occurred in gypsum modified by the addition of 5 …
