| Dispersion Study of Zirconia Nano-Powders Using Dolapix
CE64 and M65 Dispersant to Develop UF Membrane
over Novel Clay-Alumina Based Ceramic Support
for Water Treatment |
Surajit Dey,a Somendra Nath Roy,b Swachchha Majumdar,a Sourja Ghosha and Ganesh C. Sahooa, *
Pages : 187-194
DOI : 10.1080/0371750X.2019.1671233 |
| Abstract |
| Dispersion of zirconia powder in aqueous suspension using suitable dispersant for
coating application was studied. Zeta potential experiments were conducted in search
of stable suspensions. Sedimentation tests were carried out in both acidic and basic
pH range, i.e. from 2 to 11. Zirconia slurry as coating material was used for coating on
clay-alumina tubular ceramic support. The slurry was composed of zirconia nano
powder, water, dispersant and organic binder. Zirconia nano powders were
characterized by XRD, surface area by multipoint BET and TEM. The effect of dispersant
concentration on zeta potential of zirconia suspension and effect of pH, sedimentation
rate and rheology (viscosity) of zirconia suspension were studied. The coated tubes
were air dried and sintered in furnace at 700oC for 2 h. The prepared UF membrane
was subjected to characterization in terms of permeability, FESEM, molecular weight
cut off, etc. The UF membrane was used for separation of two types of water – effluent
A (kitchen sink wastewater) and effluent B (surface water of a lake). The membrane
was effective to remove the pathogenic organisms, organic load in terms of BOD,
COD, etc. The treated water may be reused in agriculture or industrial purposes.
[Keywords: Zirconia, Suspension, Zeta potential, Sedimentation, Ceramics] |
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