Metal alkoksit temmeli kompozit materyal sentezi ve boya adsorpsiyonunda kullanımı
Metal alkoxide based composite materials synthesis and use in dye adsorption
Yazar: MELTEM ASİLTÜRK
Danışman: PROF. DR. ENGİN ŞENER ; DOÇ. DR. HİKMET SAYILKAN
İnönü Üniversitesi / Fen Bilimleri Enstitüsü / Kimya Ana Bilim Dalı
Derece: Doktora, 2007
Konu: Kimya = Chemistry
Dizin: Adsorpsiyon kinetiği = Adsorption kinetic ; Aktif karbon = Activated carbon ; Kompozit malzemeler = Composite materials ; Zeta potansiyeli = Zeta potential

Özet:
Bu tezde bilinen önemli endüstriyel kirliliklerden olup, farkl. özelliklerdeki
Metilen mavisi, Oranj II ve Reaktif Remazol Brillant mavisi boyar maddelerinin at.k
sulardan uzaklaştırılması amacıyla kullanılmak üzere kompozit adsorban materyaller ve
aktif karbon üretilmiştir.
Kompozit adsorbanlar, tar.msal bir atık olan ham çam talaşı ile Ti(OPrn)4,Ti(OBun)4 ve Al(OBus
)3 metal alkoksit bile

Abstract:
In this thesis, composite adsorbent materials and an activated carbon have been
prepared to be used in removal of Methylene Blue, Orange II and Reactive Remazol
Brillant Blue dyes, which are important industrial pollutants, from waste water.
Composite adsorbents have been prepared by combining raw pine sawdust, an
agricultural waste, with hydrolysis products of Ti(OPrn
)4, Ti(OBun
)4 ve Al(OBus
)3
prepared by sol-gel method. Activated carbon samples have been prepared from the
same pine sawdust, using a chemical activation method. The structural and surface
properties of prepared adsorbents have been investigated by FTIR, XRD, BET,
TGA/DTA, SEM, Boehm techniques and Zeta potential measurements.
In this study, adsorption properties of the prepared composite materials and
activated carbon samples have been studied for three dyes. Effects of adsorbent amount,
adsorbate concentration, pH, temperature, mixing time and speed have been
investigated and optimum levels for the adsorption parameters have been determined.
Equilibrium investigation of adsorption systems has been carried out for varying
concentration of dyes and temperature. Agreement of adsorption equilibrium data with
Langmuir, Freundlich, Dubinin-Raduskevich, Redlich-Peterson and Temkin isotherm
equations has been investigated. The adsorption equilibrium constant, mono layer 
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capacity, adsorption energy, adsorption heat, adsorption power and binding energy
values and their temperature dependence have been investigated. It was found that dye
adsorption on composite adsorbents and activated carbon takes place on a mono layer
and Langmuir isotherm can be applied for any temperature and concentration.
Adsorption kinetics has also been investigated at several temperatures for
adsorption systems. Parameters such as adsorption rate constant, surface coverage
fraction and theoretical adsorption capacity and their temperature dependance have been
determined by employing Pseudo first and second order, Elovich and Bangham's, Intraparticle Diffusion and Modified Freundlich kinetic models. It was determined that all
adsorbent/adsorbate systems obey the Pseudo second order kinetic model.
Overall and activation thermodynamics of the adsorption systems have been
investigated as a function of temperature and thermal nature of adsorption process has
been studied.
Zeta potential changes of adsorbent materials used in this thesis have been
examined before and after adsorption as a function of pH.