The College of Education for Pure Sciences, Department of Chemistry, University of Basrah, discussed a master's thesis on (thermodynamic and kinetic studies for the adsorption of some medicinal drugs from their aqueous solutions using activated carbon prepared from walnut shells)
The thesis presented by the researcher (Mustafa Tawfiq Hamdi) included the preparation of activated carbon from a cheap and environmentally friendly raw material (walnut shells). Then, the prepared activated carbon was detected using microscopes and different techniques, such as (FT-IR, SEM, EDX, X-RD). Some physical properties of the prepared activated carbon were studied, as the moisture content was (2.31%), the ash content was (4.1%), and the density was (. 0.22g/cm3) in addition to measuring the acidity function and it was (6.). The efficiency of the prepared activated carbon in the adsorption of the drugs under study from their aqueous solutions was also studied in order to explore the extent of the ability of the prepared adsorbent to treat cases of drug poisoning. Where the variables affecting the capacity of Adsorption represented by studying the effect of equilibrium time, initial concentration, amount of adsorbent, temperature, and pH function of the drugs under study.
The study concluded:
Activated carbon prepared from plant raw materials (walnut shells) has a high adsorption efficiency for the drugs under study because it has a high surface area and large pores, which was confirmed by the SEM results.
The Freundlich isotherm model gave the best applicability to the studied system and to a lesser extent the Langmuir isotherm when applied to practical adsorption data in all the studied cases.
The results of the kinetic study showed that the adsorption system is subject to a pseudosecond-order equation according to the values of the correlation coefficients (R2) for the drugs under study.
And through the thermodynamic studies conducted as well as other studies that affect the determination of adsorption efficiency and the nature of the effect of concentration, temperature, etc., the adsorption process of the drugs under study is of a physical nature.
Recommendations:
Studying the use of prepared activated carbon in industrial applications due to its ease of production and low cost.
A study of some biochemical agents to study the effect of activated carbon in reducing the effects of drug poisoning by in vivo method.
Determining the actual appropriate dose of the prepared adsorbent to treat cases of drug poisoning.
Conducting a theoretical study using programs prepared for this purpose, to perform some calculations related to geometric dimensions and electronic densities .