|
Removal of Pyridine and Some Derivatives (Α-Picoline, Β-Pıcolıne And Γ-Picoline) By Activated Carbon, Magnetic Actıvated Carbon and Molecular Sıeve
This study investigates the adsorption of pyridine, α-picoline, β-picoline, and γ-picoline on the activated carbon, magnetic activated carbon and molecular sieve. In order to produce magnetic activated carbon, different weight rations of activated carbon and iron oxide were used (1:1; 2:1; 3:1) and magnetic activated carbon was produced from a suspension of FeCl3, FeSO4 and activated carbon at 70 0C. In order to increase pH value of suspension, NaOH solution (5M) was used.
The kinetic data were analyzed using the Lagergren first order rate equation. The values of the first order rate constants for each adsorbate and adsorbent were calculated. The constants of intraparticle difusion were calculated.
The Langmuir and Freundlich isotherms were used and the constants of both isotherms were calculated. The adsorption capacity for each adsorbent followed the order γ-picoline > β-picoline > α-picoline > pyridine. The capacity of activated carbon was found to be higher than magnetic activated carbon since the presence of iron oxide decreased the adsorption capacity of magnetic activated carbon.
Adsorption thermodynamics has been studied at various temperatures and the thermodynamics parameters such as equilibrium constants (K), standart free energy changes (ΔG0), standart enthalpy changes (ΔH0) and standart entropy changes (ΔS0) were calculated. Thermodynamic calculations indicated that the adsorption processes for each adsorbate and adsorbent were endothermic and spontaneus. Therefore the removal for each adsorbent increased with increasing temperature.
Fixed-beds are used to remove organic and inorganic pollutants. Therefore column studies were carried out. The capacities of column for each adsorbate and adsorbent were found to be higher than the capacities found from batch experiments.
LEVENT Elif
Danışman : Prof. Dr. Gülten ATUN
Anabilim Dalı : Kimya
Programı : Fiziksel Kimya
Mezuniyet Yılı : 2008
Tez Savunma Jürisi : Prof. Dr. Gülten ATUN,
Prof. Dr. Mahmure ÖZGÜR,
Prof. Dr. Saadet PABUCCUOĞLU ,
Doç. Dr. Gül HİSARLI,
Doç. Dr. Cemal ÖZEROĞLU
Dostları ilə paylaş: | 
