Department of Chemistry
URI for this collectionhttps://rps.wku.edu.et/handle/987654321/2335
Department of Chemistry
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Item CHEMICAL DEPOSITION OF POLYANILINE ON THE SURFACE OF MORINGA OLIFERA SEED FOR WASTEWATER TREATMENT(Wolkite University, 2023-06-19) AYANSA FIKADU G/MARIAMWater technology advancement coupled with environmental concern, increasing water demand, and the living standards of society led to the technology that provides clear water to the ecosystem. This study was give best alternative that surface modification of PANI on MO in which low-cost, effective, and environmentally friendly adsorbents new and innovated for water treatment technology. Thus, PANI/MO was synthesized by in situ oxidative polymerization of aniline on moringa olifera seed for wastewater treatment applications and study the physico- chemical parameter of wastewater generated from Enamor Woreda, Gurage Zone, SNNPR, Ethiopia. The values of most of the physicochemical parameters, and heavy metals were above the acceptable range for wastewater discharge limits set by WHO. The correlation coefficient of physico-chemical parameter between the four wastewater sampler was strong, and moderate correlation between all parameter(TDS,EC,TSS, pH, TA, and TH), while weak correlation between turbidity TDS, EC, TSS, pH, TA, TH, and Temp. The prepared nano-composites were characterized by powder XRD, FT-IR, UV spectroscopy and conductimeter. SEM and XRD studies reveal that the crystal structures of embedded MO were amorphous with semi-crystalline, while PANI, PANI/MO nanoparticles distorted and become porous with polycrystalline. Vibrational spectra analysis confirms that adsorbed PANI nanoparticles on the surface of MO acts as a compensator for positively PANI nanoparticles in the formation of PANI/MO nano composites. UV-visible spectroscopy showed that PANI/MO has a smaller band gap compared with MO; this implies that PANI/MO has a higher probability of absorbing light, being optically active, or being chemically reactive. The experiment found that the PANI/MO composites had a best adsorption capacity for copper (10.01 mg/g) and lead (23.01 mg/g) in simulated wastewater solutions. When all parameters were optimized (pH at 5, contact time at 30 minutes, temperature at 250c, and 2 gram of PANI/MO) removal adsorption efficiency for Pb2+ (99%), and Cu2+ ions(97.77%). The Freundlich isotherm data for Cu2+ and Pb2+ have a good fit with the experimental data (R2 = 0.99 and 0.98), respectively. Cu2+ and Pb2+ Langmuir isotherm data (RL=0.18 & 0.19). The pseudo second order kinetic isothermal was more fit with physic-sorption at (R2=0.99 for Cu2+ and R2=1 for Pb2+ ). The PANI/MO composite shows antibacterial activity against the bacterial species.