SWELLING BEHAVIOR OF POLY (AAM_MA) HYDROGEL MATRIX AND STUDY EFFECTS PH AND IONIC STRENGTH, ENFORCEMENT IN CONTROLLED RELEASE SYSTEM

Objective: The objective of this study was to estimate the performance of Acrylamide-malice acid (AAM_MA) hydrogel preparatory by free radical polymerization to loading/release Atenolol and Ciprofloxacin drugs from aqueous solution to be used in a controlled release system.Methods: Free radical polymerization method has been used to prepare (AAM-MA) hydrogel. The prepared hydrogel was characterized by Fourier transform infrared (FTIR), Thermal Gravimetric Analysis/Derivative Thermal Gravimetric (TGA/DTG) and Field Emission Scanning Electron Microscopy (FE-SEM) techniques. The pH-dependent swelling behavior was investigated in addition to the effective ionic strength on adsorption and release system of the drug in vitro.Results: Results showed that the highest swelling ration in pH=7.4 and the same value of pH for the release of the drug. Thermal analysis test for prepared hydrogel showed good thermal stability. The hydrogel showed a negative effect with an increase saline contact Calcium carbonate appeared to have highly effect on releasing drugs from the polymeric network.Conclusion: Higher ability of poly (AAM-MA) hydrogel to act as a carrier for the Ciprofloxacin and Atenolol with highest swelling and releasing under following conditions: at pH 7.4, at temperature 37 °C and the effect of ionic strength (charge/ratio) which indicate that the smaller radius have less effect on release and the largest charge have negative effect on release ratio that attributed to cation formation inter and intra complex surface hydrogel.Â

Photocatalytic Degradation of Anthracene in Closed System Reactor

Polycyclic aromatic hydrocarbons (PAHs) represent a large class of persistent organic pollutants in an environment of special concern because they have carcinogenic and mutagenic activity. In this paper, we focus on and discuss the effect of different parameters, for instance, initial concentration of Anthracene, temperature, and light intensity, on the degradation rate. These parameters were adjusted at pH 6.8 in the presence of the semiconductor materials (TiO2) as photocatalysts over UV light. The main product of Anthracene photodegradation is 9,10-Anthraquinone which isidentified and compared with the standard compound by GC-MS. Our results indicate that the optimum conditions for the best rate of degradation are 25 ppm concentration of Anthracene, regulating the reaction vessel at 308.15 K and 2.5 mW/cm2 of light intensity at 175 mg/100 mL of titanium dioxide (P25)