4. Conclusion
The two integrated synthesis processes, using moderate conditions
and waste (coal ash and metallic aluminum), resulted in
zeolitic products of similar purity and conversions. It was possible
to produce zeolite 4A with good purity (82%) and low-grade zeolite
Na–P1 (57–61%). However, process 1 was more favorable than process
2 in terms of greater incorporation of Si, found in the ash, into
the zeolite structure and the lower volume and concentrations of Si
and Al in the wastewater generated. With respect to the conformity
parameters for use of zeolite 4A as a builder in detergents, the synthetic
zeolites in both processes obtained results equal to or better
than the commercial zeolite used as reference. Swine wastewater
treatment showed highly significant results. The application of zeolite
Na–P1 in the treatment of swine wastewater confirmed its high
removal capacity (31mgg−1) for total ammoniacal nitrogen. Even
in the presence of high levels of other cations, the ammonia concentration
of 1205mgL−1 declined by half, suggesting that low-grade
Na–P1 is suitable for the treatment of swine wastewater