SILVA, M. C.; http://lattes.cnpq.br/9223059047176911; SILVA, Mirele Costa da.
Resumen:
Membrane separation process are experience a considerably progress in recent
years and has competed with classical separation techniques. The membranes
in general are used in the most different activities and effluent treatment is one
of the most important area of application. In this way, this work consists in
obtaining tubular ceramic membranes by the extrusion process, starting from a
mass composed by kaolin and ball clay and sintered at temperatures of 900,
1000 and 1100° C to be applied in the treatment of effluent from textile industry.
The characterization of the mass was done before sintering by plasticity
analysis, chemical analysis, particle size, thermic and x-ray diffraction.
Chemical analysis showed high content of Si02 and AI2O3. The results from
thermogravimetric analysis presented total weight loss of 13.8%, the particle
analysis showed particles with diameters with 50% of the particles close to 3.52
urn, the test for x-ray diffraction registered the presence of quartz, kaolinite and
mica. The characterization of the mass after the sintering by x-ray diffraction
showed the presence of mullite for the mass sintered at 1000°C. For the
membranes it was done the shrinkage analysis, scanning electron microscopy,
porosimetry by mercury intrusion, turbidity and flow analysis. The results
showed that the membranes presented shrinkage from 1.23 to 9.18%, porous
morphology and surface free from fissures, pore size in the range of
microfiltration and porosity between 25.16 and 40.38%. The largest water
permeated flux with desalinated water and effluent from textile industry was
achieved by membrane sintered at 1000°C. The membranes reduced
considerably the turbidity of the industrial effluent, reaching rate of rejection of
solid particles close to 100%.
