Chemistry

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https://hdl.handle.net/20.500.11888/3204

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Browsing Chemistry by Author "Abu Hafeth, Naba"

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    Polyacrylic Acid With Amide Crosslinks Decorated With Silver Nanoparticles: Synthesis And Application In Waste Water Treatment
    (جامعة النجاح الوطنية, 2019-05-05) Abu Hafeth, Naba
    In this study, Polyacrylic Acid with amide crosslinked (PAA) was decorated with Silver Nanoparticles (NPs). The resulting polymers PAA and PAA with silver NPs (PAA-Ag) were characterized by IR spectrophotometer. Both were used as adsorbents for Lead(II) and 5- Fluorouracil from aqueous solutions. The adsorption efficiency of each adsorption process was investigated as a function of adsorbent dose, adsorbate concentration, contact time, temperature and pH value. Tendency of prepared PAA-Ag for extracting Pb(II) from water was evaluated and compared to PAA. It was observed that adsorption of lead on PAA-Ag and PAA was affected by the amount of PAA-Ag until the equilibrium level. The optimum pH value for lead adsorption was 7.33 and 4.7 for PAA-Ag and PAA respectively and the equilibrium was established within the first 10 min adsorption was done at room temperature. It was found that Lead adsorption kinetics has followed pseudo-second-order. Experimental data were analyzed using two model equations: Langmuir and Freudlinch and it was found that the data fitted well with Freundlich isotherm model. Meanwhile, PAA-Ag was used as adsorbents for the removal of 5-FU from aqueous solution. The concentration of 5-FU in the supernatant was measured by UV-vis spectrophotometer. It was observed that adsorption of 5-FU was affected by the amount of PAA-Ag until the equilibrium level. The optimum pH value for 5-FU adsorption was 8.18 and the equilibrium was established in 5 min. It was also evident that the adsorbed 5-FU was decreasing as the concentration of 5- FU was increased in solution. It was found that 5-FU adsorption kinetics has followed pseudo-second-order. And it was found that the data fitted well with Langmuir isotherm model