Keywords : FTIR
Rafidain Journal of Science,
2020, Volume 29, Issue 1, Pages 26-40
The adsorption of the cadmium element ion was used by the Chara sp., where it was dried and the effective groups of algae responsible for adsorption using infrared (FTIR) were COOH , (C=O) and aliphatic nexus (C-H), in addition to the presence of groups with a negative charge such as (OH), (P = O), (CO3), (CH2), (Cl) and (Br) on the surface of the algae, and taking them at a weight of 2 g and treated with a series of different concentrations (0,5,10,20,40,100) mg.L-1 of Cadmium ion where incubation coefficients at (298°) Kelvin,
After the incubation period, the stabilizers were extracted and Cadmium was quantified with mathematical description according to the equations of the single-surface (Langmuir, Freundlich, Temkin, Dubinin and Polani) respectively for Cadmium, It was found that the values of the coefficient of determination were effective for all equations, which gives a clear indication of the possibility of using any of these six equations. However, the two-sided Langmuir equation is the most efficient in the mathematical description of adsorption. Moreover, this equation showed a very large correlation between the actual adsorption values and the calculated values of this equation because they have the lowest standard error (SE) (0.0001) and the highest coefficient of determination (R2) (1.00), which gains the advantage in the mathematical description on the rest of the equations. The maximum adsorption capacity (Xm) on the first and second surfaces (1.28) and (169.49) mg. Kg -1 respectively, while the binding capacity (K) on the first and second surfaces (186.62) and (29.50) L.mg-1 respectively.
Rafidain Journal of Science,
2014, Volume 25, Issue 3, Pages 22-31
The current study was designed for using grape fruit peels (Citrus paradise) to remove lead, copper and zinc from industrial wastewater. Three forms of these peels (fresh, dried small pieces and powder) were tested under some environmental factors such as pH, temperature and contact time. Current data show that grape fruit peels are capable of removing lead, copper and zinc ions with a significant capacity. Furthermore, the powder of grape fruit peels had a highest capability in removing all lead, copper and zinc ions followed by fresh peels whilst dried peels had the lowest bioremoving capacity again for all metals under test. The highest capacity was for lead then copper and finally zinc. All these data were significantly (LSD peel forms = 3.349 mg/l) varied. However, some examined factors were found to have significant impacts upon the bioremoval capacity of grape fruit peels such as pH, temperature, and contact time where best biosorption capacity was found at pH 4, at temperature 50 Cº and contact time of 1 hour. It is true that grape fruit peels varied significantly in case of metal ions and increasing examined factor (pH, temperature, and contact time). The fourier transform infrared spectroscopy analysis (FTIR) illustrated that hydroxyl, carboxyl and carbonyl groups were the major binding sites for Pb, Cu and Zn ions by grape fruit peels.