Sulu çözeltiden chitosan ve mcm-chitosan ile bazı boyarmaddelerin adsorpsiyonunun kinetik ve termodinamik olarak incelenmesi
Yükleniyor...
Tarih
2001
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Dicle Üniversitesi, Fen Bilimleri Enstitüsü
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu çalışmada, sulu çözeltiden chitosan ile bazı boyarmaddelerin (oranj II, kristal viyole, reaktif mavisi 5) ve ideal adsorplanan olarak kabul edilen p-nitro fenolün adsorpsiyonlan başlangıç derişimine, sıcaklığa ve çalkalama hızına bağlı olarak incelenmiştir. Her bir boyarmadde ve p-nitro fenol için farklı sıcaklıklarda elde edilen kinetik veriler değişik kinetik denklemlerde (Lagergren denklemi, Weber-Morris denklemi, McKay et al. denklemi) değerlendirilerek değişik kinetik parametreler hesaplanmıştır. Ayrıca her bir boyarmadde ve p-nitro fenol için farklı sıcaklıklarda izoterm çalışması yapılarak izoterm eğriler elde edilmiştir. Bu izoterm eğriler uydukları izoterm denklemlerin çizgisel ifadelerinde değerlendirilerek izoterm sabitleri ve adsorpsiyon izotermleri Langmuir adsorpsiyon izotermine uyan boyarmaddeler için, Langmuir b sabiti termodinamik bağıntılarda değerlendirilerek termodinamik parametreler hesaplanmıştır. Daha sonra chitosan modifiye edilerek yüzey özelliği değiştirilmiştir. Sulu çözeltiden bu modifiye edilmiş chitosan ile (MCM-chitosan) oranj II ve kristal viyole adsorpsiyonlan sıcaklığa bağlı olarak incelenmiştir. Her iki boyarmadde için farklı sıcaklıklarda elde edilen kinetik veriler yukarda belirtilen kinetik denklemlerde değerlendirilerek kinetik parametreler hesaplanmıştır. Ayrıca her iki boyarmadde için farklı sıcaklıklarda izoterm çalışması yapılarak izoterm eğriler elde edilmiştir. Kristal viyole için elde edilen izoterm eğriler Langmuir izotermine uyduğundan dolayı bu izoterm eğriler Langmuir çizgisel denkleminde değerlendirilerek Langmuir sabitleri ve Langmuir b sabitleri termodinamik bağıntılarda değerlendirilerek kristal viyole adsorpsiyonu için termodinamik parametreler hesaplanmıştır.
In this study, the adsorptions of some dyestuffs (orange II, crystal violet and reactive blue 5) and accepted as ideal adsorbate p-nitro phenol by chitosan from aqueous solution were investigated as dependent on initial concentration, temperature and shaking rate. Kinetic data obtained for each dyestuff and p-nitro phenol at different temperatures were applied to various kinetic equations (Lagergren equation, Weber-Morris equation and McKay et al. equation) and various kinetic parametres were calculated. Besides, isotherm curves being done isotherm study for each dyestuff and p-nitro phenol at different temperatures were obtained. These experimental data were applied to linear states of isotherm equations they fitted and isotherm constants were calculated and then for dyestuffs which adsorption isotherms of these are fitting Langmuir adsorption isotherm, Langmuir b constants were applied to thermodynamic equations and thermodynamic parametres were also calculated. Then, chitosan was modified and its surface property was changed. The adsorptions of orange II and crystal violet by this modified chitosan (MCM-chitosan) from aqueous solution were investigated as dependent on temperature. Kinetic data obtained for every two dyestuffs at different temperatures were applied to above stated kinetic equations and kinetic parametres were calculated. Besides, isotherm curves being done isotherm study for every two dyestuffs at different temperatures were obtained. Owing to isotherm curves obtained for crystal violet fitted Langmuir isotherm, experimental data were applied to Langmuir linear isotherm equation and Langmuir constants were calculated. Then, Langmuir b constants were applied to thermodynamic equations and thermodynamic parametres for adsorption of crystal violet were also calculated.
In this study, the adsorptions of some dyestuffs (orange II, crystal violet and reactive blue 5) and accepted as ideal adsorbate p-nitro phenol by chitosan from aqueous solution were investigated as dependent on initial concentration, temperature and shaking rate. Kinetic data obtained for each dyestuff and p-nitro phenol at different temperatures were applied to various kinetic equations (Lagergren equation, Weber-Morris equation and McKay et al. equation) and various kinetic parametres were calculated. Besides, isotherm curves being done isotherm study for each dyestuff and p-nitro phenol at different temperatures were obtained. These experimental data were applied to linear states of isotherm equations they fitted and isotherm constants were calculated and then for dyestuffs which adsorption isotherms of these are fitting Langmuir adsorption isotherm, Langmuir b constants were applied to thermodynamic equations and thermodynamic parametres were also calculated. Then, chitosan was modified and its surface property was changed. The adsorptions of orange II and crystal violet by this modified chitosan (MCM-chitosan) from aqueous solution were investigated as dependent on temperature. Kinetic data obtained for every two dyestuffs at different temperatures were applied to above stated kinetic equations and kinetic parametres were calculated. Besides, isotherm curves being done isotherm study for every two dyestuffs at different temperatures were obtained. Owing to isotherm curves obtained for crystal violet fitted Langmuir isotherm, experimental data were applied to Langmuir linear isotherm equation and Langmuir constants were calculated. Then, Langmuir b constants were applied to thermodynamic equations and thermodynamic parametres for adsorption of crystal violet were also calculated.
Açıklama
Lisansüstü tezlerin elektronik ortamda toplanması, düzenlenmesi ve erişime açılması konusuna ilişkin yök'ün 18.06.2018 tarihli yönergesine istinaden artık bu tarihten sonra gizlilik şartı aranmayan bütün tezler erişime açılacaktır.
Anahtar Kelimeler
Adsorpsiyon, Adsorpsiyon kinetiği, Boyar maddeler, Kitosan, Adsorption, Adsorption kinetic, Dyestuffs, Chitosan
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Uzun, İ. (2001). Sulu çözeltiden chitosan ve mcm-chitosan ile bazı boyarmaddelerin adsorpsiyonunun kinetik ve termodinamik olarak incelenmesi. Doktora tezi, Dicle Üniversitesi, Diyarbakır.
