Abstract: The paper first analyzes the adsorption capacity of various inorganic minerals (diatomite, zeolite, molecular sieve) with different particle sizes on ammonia. Based on this approach, the most effective inorganic minerals for adsorption are enhanced by incorporating aluminum sulfate and adjusting the pH level during the mixing process to enhance pore expansion. The adsorption efficiency changes before and after the modification are tested and compared. Finally, the best combination of the tests mentioned above is used to create a deodorant emulsion. This emulsion is then applied, rolled, and dried on nonwoven materials to produce nonwovens with effective deodorizing capabilities. The adsorption efficiency, deodorizing grade,softness, flakiness, and other characteristics of the materials were analyzed. The results show that under the same conditions, diatomite, zeolite, and molecular sieve have different adsorption efficiencies for ammonia.Diatomite has the best adsorption effect, while the other two are weaker. With the change of its particles from coarse to fine (i.e., mesh size from small to large), the adsorption efficiency of diatomite for ammonia decreases and then increases, reaching the maximum when the fineness is about 700 mesh. The addition of aluminum sulfate and the weak-base pH value of the solution positively impacted the adsorption efficiency of diatomite. This positive impact ceased to increase significantly when the aluminum sulfate content reached 1%. The adsorption efficiency was maximized when the pH value of the size reached about 8. By increasing the binder content in the deodorizing emulsion, the deodorizing efficiency of deodorized nonwovens initially increased, then decreased. This change was accompanied by a decrease in the amount of flakes and a reduction in softness. To conclude, nonwovens combined with deodorizing emulsion prepared based on modified porous inorganic salt possessed a high ability to remove ammonia and urine odor.

Key words: porous inorganic substance; deodorization; nonwoven hygienic material; adsorption efficiency