Description of Individual Course Units
Course Unit CodeCourse Unit TitleType of Course UnitYear of StudySemesterNumber of ECTS Credits
9105025432013Adsorption Behavior of Solid SurfacesElective118
Level of Course Unit
Second Cycle
Language of Instruction
English
Objectives of the Course
Dersin amacı katı-gaz ve katı-sıvı arayüzeyindeki adsorpsiyon proseslerine teorik bir temel oluşturmaktır. Bu amaçla, arayüzey sistemlerinde etkili olan moleküller arası çekim kuvvetleri, adsorpsiyon prosesinde etkili olan katı yüzeyin yapısı detaylı olarak ele alınmaktadır. Adsorpsiyonda denge, adsorpsiyon izotermleri, tek ve çok tabakalı adsorpsiyon ele alınmakta, adsorpsiyon kinetiği, elektrolit çözeltilerinde bulunan kolloid sistemlerde elektriksel çift tabaka oluşumu ve DLVO- teorileri, kolloidleri kararlı ve karasız hale getiren şartlar detaylı olarak incelenmektedir. Ağır metal iyonlarının, yüzey aktif maddelerin ve polimerlerin çözeltilerinden katı yüzeylere adsorpsiyonu özel olarak ele alınmaktadır. Katı ve sıvıların yüzey özellikleri ve etkileşimleri: yüzey/arayüzey gerilimi, kohezyon/adhezyon, ıslatma, yayılma gibi kavramların ele alınması ile konunun daha derinlemesine incelenmesi sağlanmaktadır.
Name of Lecturer(s)
Learning Outcomes
1Learning subjects like adsorption of ions (ion-exchange), surface active agents and polymers by the use of these theoretical knowledge applications on the areas of waste water treatment, deionized water production, paints, dyes, inks, detergency production etc. exist.
2Inquiring the ability to present new information studied from sources like books and internet sites on the structure of solid surfaces, properties of colloids, adsorption of surfactants and polymers onto solid surfaces etc..
3Comprehend the study in team work during project preparation and problem solving.
4Learning interaction forces between different types of molecules, surface/interfacial tension, work of cohesion/adhesion which are important for adsorption and surface phenomena. Having information on adsorption behavior of solid surfaces, the reason for their adsorption behavior and structure of solid surfaces. Distinguishing between physical and chemical adsorption and learning equilibrium principles at the solid-gas and solid-liquid interface of adsorption, isotherm models and adsorpsion kinetics. Establishing the link between colloid chemistry and the conditions for stabilization and instabilization of colloid particles and having deeper knowledge on the formation of electrical double layer at the colloid systems in electrolyte solutions-the DLVO Theory.
Mode of Delivery
Face to Face
Prerequisites and co-requisities
Yok
Recommended Optional Programme Components
Yok
Course Contents
Arayüzey olaylarının önemi, arayüzey olaylarında etkili olan moleküller arası etkileşim kuvvetlerinin türleri, katı yüzey-sıvı (gaz) etkileşiminde önemli olan yüzey/arayüzey gerilimi, kohezyon/adhezyon, ıslatma, yüzeyde yayılma, eğimli yüzeylerde oluşan basınç farkı gibi kavramlar, katı yüzeylerin yapısı: kristal yapıdaki katılarda atomların dizilimi, serbest katı yüzeyin özellikleri, kristal yapılı katıların yüzey enerjileri ve yüzey atomlarının farklı dizilimi, yüzey enerjisi ve adsorpsiyon, fiziksel ve kimyasal adsorpsiyon arasındaki farklar, adsorpsiyonda katı/gaz ve katı/sıvı arayüzeyinde denge, ve izoterm modelleri, adsorpsiyon kinetiği, ağır metal iyonlarının (iyon değişimi) ve yüzey aktif maddelerin katı yüzeylere adsorplanma özellikleri, kolloidler: kolloid parçacıkların yüzey potansiyeli, yüklü arayüzeyler, elektrolit çözeltisi ile yüklü yüzeyler arası etkileşim, Gouy-Chapman teorisine göre elektriksel çift tabakada iyonların dağılımı, yüklü yüzeyler arası etkileşim- DLVO teorisi ve kolloid parçacıkların kararlılığını veya koagülasyonunu etkileyen faktörler, yüzey kimyası ve zeta potansiyeli, polimerlerin adsorpsiyonu: polimerlerin çözeltilerdeki davranışı ve değişik çözeltilerden katı yüzeylere adsorplanma özellikleri.
Weekly Detailed Course Contents
WeekTheoreticalPracticeLaboratory
1Introduction to interfacial phenomena. Interaction forces in interfacial systems.
2Interactions between different types of molecules such as: permanently charged-polar, permanently charged-induced dipole and induced dipole - induced dipole molecules.
3Interaction forces (continiued)- van der Waals Interactions: Keesom orientation, Debye inductive and London dispersion forces. Potential energy curves. Forces and energies of adsorption. Attractive energies in condensed phases.
4Some definitions: Surface/interfacial tension, work of cohesion /adhesion, wetting, spreading,pressure differences across a curved surface, capillary effect.
5Structure of solid surfaces: Crystalline solids and their structure, characteristics of the free solid surface, surface energy of crystalline solids and rearrangement of the surface atoms. Surface energy and adsorption.
6Fundamental concepts in physical and chemical adsorption. Definitions, forces and energies of adsorption, practical adsorbents.
7Physical adsorption. Adsorption at the solid-gas and solid-liquid interface. Adsorption equilibrium. Adsorption isotherms, monolayer and multilayer adsorption, orientation of adsorbed molecules and their interactions.
8Theoretical foundations of isotherm models, calculation of isotherms with chosen isotherm models. Adsorption at the solid-liquid interface. Adsorption equilibrium. Adsorption isotherms, monolayer and multilayer adsorption.
9Adsorption kinetics and their models. Ion-exchange adsorption. Principles, factors that affect the ion exchange process.
10Adsorption of surfactants. Adsorption behaviour of anionic and non-ionic surfactants from solution onto solid surfaces.
11Colloids: Surface potential of colloidal particles, charged interfaces,
12Colloids: (continued) interaction between charged surfaces and electrolyte solution – distribution of charged ions in electrical double layer according to Gouy-Chapman Theory, interactions between charged surfaces-DLVO-Theory and stabilization or coagulation of colloidal particles, surface chemistry-zeta potential.
13Colloids (continued 3): Applications involving colloidal interfacial systems; Paints, protecting latex coatings, modern ceramics and powder synthesis, zeolite synthesis, etc.
14Adsorption of polymers. Polymers in solution and their adsorption behavior from solution
15Amphiphilic systems; liquid-liquid interfaces. Emulsion formation and types.
16FINAL EXAM
Recommended or Required Reading
1- Fundamentals of Interfacial Engineering, R. J. Stokes, D. F. Evans, Willey-VCH, New York, 1997 2- Adsorption, J. Oscik, Elis Horwood Limited, 1982 3- Principles of Adsorption and Adsorption Processes, D.M. Ruthven, John Willey and Sons, 1984 4- Surfactants and Polymers in Aqueous Solution, B. Jönsson, B. Lindman, K. Holmberg, B. Kronberg, John Willey and Sons, Chichester, 1998
Planned Learning Activities and Teaching Methods
Etkinlikler ayrıntılı olarak "Değerlendirme" ve "İş Yükü Hesaplaması" bölümlerinde verilmiştir.
Assessment Methods and Criteria
Term (or Year) Learning ActivitiesQuantityWeight
Midterm Examination1100
SUM100
End Of Term (or Year) Learning ActivitiesQuantityWeight
Final Examination1100
SUM100
Term (or Year) Learning Activities40
End Of Term (or Year) Learning Activities60
SUM100
Work Placement(s)
Yok
Workload Calculation
ActivitiesNumberTime (hours)Total Work Load (hours)
TOTAL WORKLOAD (hours)0
Contribution of Learning Outcomes to Programme Outcomes
PO
1
PO
2
PO
3
PO
4
PO
5
PO
6
PO
7
LO1       
LO2       
LO3       
LO4       
* Contribution Level : 1 Very low 2 Low 3 Medium 4 High 5 Very High
 
Ege University, Bornova - İzmir / TURKEY • Phone: +90 232 311 10 10 • e-mail: intrec@mail.ege.edu.tr