Discussion of a master’s thesis in the Department of Chemistry entitled ((Study of removing Malachite Green and Methylene Blue dyes from their aqueous solutions using the powder of the snail shell and its axial shape as a low-cost adsorbent))

Master thesis discussion

The Department of Chemistry at the College of Education for Pure Sciences / University of Karbala discussed a master’s thesis tagged (a study of removing the two dyes of Malachite Green and Methylene Blue from their aqueous solutions using the powder of the snail shell and its axial shape as a low-cost adsorbent), for the student (Raad Khudair Abbas), under the supervision of Prof. Munir Al-Daami, on Thursday 12/24/2020, and at the discussion room of the Chemistry Department, and the aim of the study was: The possibility of using snail shell powder with a pointed canine and its axial shape to remove Malachite Green and Methylene Blue from its aqueous solutions as a low-cost adsorbent. The best adsorption process, represented by (equilibrium time, quantity of adsorbent surface, temperature, acidity function and ionic intensity. Calculation of the thermodynamic functions of the adsorption process represented by (∆ G, ∆H, S). And the study of adsorption isotherms and their applicability with the equations of Lancmayr and Friendlich. And the change of the surface of the snail shell with a tapered tip to (helix shell polymer – melamine – formaldehyde) to obtain the highest percentage of removal of pigments and in the shortest time and the least weight of the surface of the adsorbent. The dye takes the shape of the letter S according to the Giles classification. G, ∆S, and H, while it was found that the adsorption process of MG and MB dyes on the surface of the axis of the helix shell is an automatic, exothermic process and a decrease in randomness from the values ​​of change in the negative compression energy, the negative enthalpy value and the negative S value.
The discussion came out with recommendations, including: Given the increase in the level of pollution in the world, it will be useful to conduct extensive studies of the adsorption ability of the shell of a snail with a pointed tip, its shape being the focus of the research used in the research of many organic and inorganic pollutants that are found in river water, and wastes of refineries and factories. The polluted water coming out of the industrial units contains other types of pollutant dyes, so studying the adsorption of other types on the surface of the snail shell, its axial shape, will be of importance in the fields of water purification. The tapered snail shell, its axial shape, can be used to study its ability to adsorb toxic heavy metal ions, and to make a comparison in the adsorption of the tapered snail shell, its axial shape, to toxic heavy metal ions. The letter has been accepted by the discussion committee.