The Department of Chemistry Discusses a Master’s Thesis on the Study of Adsorption of Congo Red Dye on New Polymeric Compounds of Chitosan

Discussion of a Master’s Thesis

The Department of Chemistry at the College of Education for Pure Sciences discussed the master’s thesis for student (Wassan Jabbar Hussein) for her tagged thesis entitled (Study of adsorption of Congo red dye on new polymeric compounds of chitosan), under the supervision of Prof. Dr. Hameda Eidan Salman, and the second supervisor Prof.Dr. Assem Allaah Abd-Alhussain  Where the aim of the study was:

1. Preparation of new crosslinked polymeric materials using chitosan.
2. Identification of polymeric materials prepared by several techniques (TGA, XRD, SEM, FT-IR).
3. Study of the thermal properties of the prepared polymers.
Use of new polymeric materials for adsorption of Congo red dye.
4. Studying the optimal conditions for the adsorption process (time, amount of adsorbent surface, pH, initial dye concentration, temperature).
5. Calculating the values ​​of thermodynamic functions for the adsorption process (ΔS, ΔG, ΔH).
6. Study of adsorption isotherms and their applicability with Lankmayr, Freundlich, and Tamkeen equations.
7. Study of swelling and determination of the amine group of the prepared polymers.
* The most important conclusions:
1. The possibility of modifying the chitosan polymer to obtain crosslinked polymers TVCCS, and TCCS used to remove Congo red from its aqueous solutions.
2. The efficiency of dye removal is affected by factors (equilibrium time, dye concentration, adsorbing surface amount, acidity function, and temperature).
3. The dye equilibrium data for TVCCS and TCCS surfaces showed that they are in good agreement with the Lanmicair isotherm.
4. The process of removing dye on the surface of the crosslinked polymer TCCS is an automatic heat-absorbing process and an increase in randomness. As for the cross-linked polymer TVCCS, the process of removing dye spontaneously emits heat and a decrease in randomness also in terms of the values ​​of thermodynamic functions.

After extensive scientific discussion and listening to the student’s defense of her thesis, her research method, and her use of sources and references, the thesis was approved with honors. Congratulations to the student, her supervisors, the Department of Chemistry, and the College of Education for Pure Sciences for this great achievement, and God Almighty grants success.