In this thesis study, the use of clay-polymer nanocomposites for their
applicability in landfill sites as a product of retardation of waste water infiltration
was evaluated. For this purpose, organophilic clays from HDTMA+ organic cation
and nanocomposites of montmorillonite were prepared. The bentonite samples B1,
B2 and B3 dominantly contain 2:1 layer montmorillonite and 1:1 interstratification of
illite/smectite mixed layer as clay minerals. B1 is an unmodified yellow bentonite
and B2 is a grey bentonite modified from B1, by the addition of Na2CO3 (Soda Ash).
They were obtained from Hanç / ili (Kalecik-Ankara) bentonite deposit which belongs
to the Hancili Formation of Early Pliocene age. B3 is a standard Wyoming (SWy-1)
white bentonite and belongs to the Newcastle formation of Cretaceous age.
Their cation exchange and swelling capacity values were determined and the
values increase from B1, B2 to B3. In order to produce clay-polymer
nanocomposites, firstly organoclays were produced in bentonite samples. Claypolymer
nanocomposite production was achieved by in situ intercalative
polymerization successfully with intercalation and partly exfoliation of clay minerals
with polyacrylamide (PAM). The samples of sand (S1), sand+bentonite (S2) and
sand+nanocomposite (S3) mixtures were prepared and their permeability was
determined. As a result of these values, the permeability of samples decrease from
S1, S2 to S3.
The results imply that the permeability of sample decreases as the claypolymer
nanocomposite content increases resulting in a retardation of water
penetration throughout the sample. The product has a potential to be used as a
retardant for waste water infiltration in landfill sites.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12608872/index.pdf |
| Date | 01 September 2007 |
| Creators | Bildiren, Mert |
| Contributors | Bildiren, Mert |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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