Adsorption of nitrosamines in acidic solution by zeolites
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Adsorption of N-nitrosopyrrolidine (NPYR) by zeolite NaZSM-5, Hb and NaZSM-11 in acidic solution with pH of 1 was investigated. The NPYR uptake process obeyed the first-rate Lagegren kinetic equation describing adsorption, and the equilibrium data were fitted to the Langmuir or Freundlich adsorption equation. Zeolite ZSM-5, Hb and NaZSM-11 possessed a higher adsorption capacity than amorphous silica or ordered mesoporous siliceous SBA-15, implying their potential application for adsorption of nitrosamines in gastric juice to anti-cancer.
Source: http://zeolite-australia.com/research/zeolite-nitrosamines.pdf
