Yıl: 2021 Cilt: 49 Sayı: 2 Sayfa Aralığı: 133 - 145 Metin Dili: İngilizce DOI: 10.15671/hjbc.687387 İndeks Tarihi: 21-01-2022

Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics

Öz:
In this study, magnetic biochar obtained from pyrolysis of pretreated olive pomace by iron chloride was used as adsorbent to remove phenol and the adsorption capacity of phenol was revealed. Batch experiments were performed as a function of pH, contact time, adsorbent dosage, temperature, and phenol concentration. Moreover, adsorption kinetics and thermodynamics of phenol adsorption onto magnetic biochar were also evaluated in the study. The optimum conditions for maximum adsorption capacity were obtained at pH of 5.7, dosage of biochar 0.14 g and 60 minutes contact time. In this study, three adsorption isotherms, namely Langmuir, Freundlich and Temkin, were applied to fit the equilibrium data of adsorption of phenol onto magnetic biochar. Results showed that correlation coefficients (R 2) for three isotherm models decreased with the temperature increment from 20°C to 40°C and the most suitable isotherm model for adsorption was Freundlich. As for kinetics of the adsorption process, the best described model was found as pseudo-second order. In adsorption thermodynamics part, the negative ΔH° and ΔG° values demonstrated that adsorption was exothermic, feasible and was more spontaneous at lower temperatures.
Anahtar Kelime:

Pirinadan Elde Edilen Magnetic Biyokömür ile Fenol Adsorpsiyonu: Denge, Kinetik ve Termodinamik

Öz:
Bu çalışmada, demir klorür ile işlem görmüş pirinanın pirolizinden elde edilen manyetik biyokömür, fenol gideriminde adsorban olarak kullanılmış ve fenolün adsorpsiyon kapasitesi ortaya konmuştur. Çalışmada, fenolün adsorpsiyonu farklı pH, temas süresi, adsorban dozu, sıcaklık ve fenol konsantrasyonlarında denenmiştir ve en uygun koşullar optimum olarak seçilmiştir. Ayrıca, fenol adsorpsiyon kinetiği ve termodinamiği de çalışma kapsamında değerlendirilmiştir. Maksimum adsorpsiyon kapasitesi için optimum koşullar, pH 5.7, biyokömür dozu 0.14 g ve 60 dakika temas süresinde elde edilmiştir. Bu çalışmada, fenolün manyetik biyokömür üzerinde adsorpsiyonu için Langmuir, Freundlich ve Temkin adlı üç adsorpsiyon izotermi uygulanmıştır. Sonuçlar, üç izoterm modeli için 20°C’den 40°C’ye çıkıldığında korelasyon katsayılarının (R 2) sıcaklık artışıyla azaldığını ve adsorpsiyon için en uygun izoterm modelinin Freundlich olduğunu göstermiştir. Adsorpsiyon işleminin kinetiğine gelince, en iyi model yalancı ikinci mertebe olarak bulunmuştur. Adsorpsiyon termodinamik kısmında, negatif ΔH° ve ΔG° değerleri, adsorpsiyonun ekzotermik, uygulanabilir ve düşük sıcaklıklarda daha spontan olduğunu göstermiştir.
Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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APA GÖKTEPELİ G, YILDIZ S, YEL E (2021). Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. , 133 - 145. 10.15671/hjbc.687387
Chicago GÖKTEPELİ Gamze,YILDIZ SEVIL,YEL Esra Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. (2021): 133 - 145. 10.15671/hjbc.687387
MLA GÖKTEPELİ Gamze,YILDIZ SEVIL,YEL Esra Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. , 2021, ss.133 - 145. 10.15671/hjbc.687387
AMA GÖKTEPELİ G,YILDIZ S,YEL E Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. . 2021; 133 - 145. 10.15671/hjbc.687387
Vancouver GÖKTEPELİ G,YILDIZ S,YEL E Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. . 2021; 133 - 145. 10.15671/hjbc.687387
IEEE GÖKTEPELİ G,YILDIZ S,YEL E "Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics." , ss.133 - 145, 2021. 10.15671/hjbc.687387
ISNAD GÖKTEPELİ, Gamze vd. "Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics". (2021), 133-145. https://doi.org/10.15671/hjbc.687387
APA GÖKTEPELİ G, YILDIZ S, YEL E (2021). Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. Hacettepe Journal of Biology and Chemistry, 49(2), 133 - 145. 10.15671/hjbc.687387
Chicago GÖKTEPELİ Gamze,YILDIZ SEVIL,YEL Esra Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. Hacettepe Journal of Biology and Chemistry 49, no.2 (2021): 133 - 145. 10.15671/hjbc.687387
MLA GÖKTEPELİ Gamze,YILDIZ SEVIL,YEL Esra Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. Hacettepe Journal of Biology and Chemistry, vol.49, no.2, 2021, ss.133 - 145. 10.15671/hjbc.687387
AMA GÖKTEPELİ G,YILDIZ S,YEL E Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. Hacettepe Journal of Biology and Chemistry. 2021; 49(2): 133 - 145. 10.15671/hjbc.687387
Vancouver GÖKTEPELİ G,YILDIZ S,YEL E Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics. Hacettepe Journal of Biology and Chemistry. 2021; 49(2): 133 - 145. 10.15671/hjbc.687387
IEEE GÖKTEPELİ G,YILDIZ S,YEL E "Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics." Hacettepe Journal of Biology and Chemistry, 49, ss.133 - 145, 2021. 10.15671/hjbc.687387
ISNAD GÖKTEPELİ, Gamze vd. "Phenol Adsorption on Magnetic Biochar Derived From Olive Pomace: Equilibrium, Kinetic and Thermodynamics". Hacettepe Journal of Biology and Chemistry 49/2 (2021), 133-145. https://doi.org/10.15671/hjbc.687387