PATRICIO, A. C. L.; http://lattes.cnpq.br/1450891090733507; PATRÍCIO, Aline Cadigena Lima.
Résumé:
The most important challenges for companies and industrial production processes.
The kaolin mining and processing industry has been cited as a source of
environmental aggression for generating thousands of tons of solid waste annually,
and its largest share is disposed indiscriminately in the environment, which
associates kaolin with a huge environmental liability. Therefore, this research work
had as objective to test the adsorption capacity of solid residue of kaolin from the
region of Junco do Seridó, providing a destination to this material making it a
possible new adsorbent, since this residue has high availability. Initially a sample of
the residue was characterized by X-ray Spectrophotometer by Dispersive Energy
where it was observed that the material had predominance of silicon oxide and
aluminum oxide, characteristic of the constituents of the kaolinite type. The sample
was characterized by X-ray diffraction by a presence of mineral kaolinite through
characteristic peaks corresponding to the sample, in sequence a residue sample was
subjected to tests of Foster swelling and Adsorption capacity where the results
suggested greater swelling of Foster in the sample after agitation and higher
adsorption capacity without solvent gasoline. The pH test was performed on three
effluents in different systems containing the kaolin residue where the best pH
obtained was 3.8-3.9 for the effluents tested. Then, the studies were performed with
the mathematical model of pseudo-first order and pseudo-second order. From the
kinetic data, adsorption isotherms were obtained and the data were adjusted to the
Langmuir and Freundlich isotherms models and the data were better fitted to the
Langmuir model. Thus, the data obtained indicate that the residue from the process
of kaolin processing is a promising material and presented high potential as an
adsorbent.
