Adsorption Isotherms and Thermodynamics on Peach Kernel Peel of Malahit Green

Yıl 2020, Cilt: 5 Sayı: 2, 103 - 111, 18.12.2020

Ali Çiçekçi Bünyamin Dönmez , Erbil Kavcı , Ömer Laçin

https://doi.org/10.33484/sinopfbd.701059

Cited By: 4

Öz

In this study, common adsorption isotherm models and thermodynamic analysis of malachite green on raw peach kernel peel are investigated. From the results obtained, it is determined that the most suitable model according to the correlation coefficients is Freundlich isotherm. In addition, the calculated n value greater than 1 indicates that the adsorbent has a heterogeneous surface. In Langmuir isotherm model, the maximum adsorption capacity is calculated as 8.19 mg.g^-1. Also, from the thermodynamic analysis, the free enthalpy change of -21.53 kJ.mol^-1 and the Gibbs free energy value of about -39 kJ.mol^-1 reveal that the adsorption process is exothermic, physically and spontaneous. As a result, the peach kernel skin can be used as a suitable adsorbent for removing malachite green in aqueous solutions. In addition, it can be said that the isotherm model and thermodynamic parameters obtained will provide useful data for the industrial greenhouse removal process.

Anahtar Kelimeler

Peach kernel peel, Malachite green, Adsorption isotherm, Thermodynamic parameters

Malahit Yeşilinin Şeftali Çekirdeği Kabuğu Üzerine Adsorpsiyon İzotermi ve Termodinamiği

Öz

Bu çalışmada, malahit yeşilinin ham şeftali çekirdeği kabuğu üzerine yaygın adsorpsiyon izoterm modelleri ve termodinamik analizi incelenmiştir. Elde edilen sonuçlardan, korelasyon katsayılarına göre en uygun modelin Freundlich izotermi olduğu belirlenmiştir. Ayrıca, hesaplanan n değerinin 1’den büyük olması adsorbentin heterojen bir yüzeye sahip olduğunu göstermiştir. Langmuir izoterm modelinde ise, maksimum adsorpsiyon kapasitesi 8.19 mg.g^-1 olarak hesaplanmıştır. Ayrıca, termodinamik analizlerden, serbest entalpi değişiminin -21.53 kJ.mol^-1 ve Gibbs serbest enerji değerinin ise yaklaşık -39 kJ.mol^-1 olması, adsorpsiyon prosesinin ekzotermik , fiziksel karakterli ve kendiliğinden yürüdüğünü ortaya koymaktadır. Sonuç olarak, şeftali çekirdeği kabuğunun, sulu çözeltilerdeki malahit yeşilinin uzaklaştırılması hususunda uygun bir adsorbent olarak kullanılabilir. Ayrıca elde edilen izoterm modeli ve termodinamik parametrelerin, endüstriyel olarak malahit yeşilinin giderilmesi prosesine faydalı veriler sağlanacağı söylenebilir.

Anahtar Kelimeler

Şeftali çekirdeği kabuğu, Malahit yeşili, Adsorpsiyon izotermi, Termodinamik parametreler

Kaynakça

• Garg V. K, Gupta R, Bala Yadav A, Kumar R, 2003. Dye removal from aqueous solution by adsorption on treated sawdust. Bioresource Technology, 89 (2): 121-124.
• Erkmen J, 2018. The use of hydroxyethyl cellulose as a transparent filling material in finishing polish. Pigment & Resin Technology, 47(4): 323-329.
• Kupeta AJK, Naidoo EB, Ofomaja AE, 2018. Kinetics and equilibrium study of 2-nitrophenol adsorption onto polyurethane cross-linked pine cone biomass. Journal of Cleaner Production, 179: 191-209.
• Srivastava S, Sinha R, Roy D, 2004. Toxicological effects of malachite green. Aquatic Toxicology, 66(3): 319-329.
• Santhi T, Manonmani S, 2011. Malachite Green Removal from Aqueous Solution by the Peel of Cucumis sativa Fruit. CLEAN – Soil, Air, Water, 39(2):162-170.
• Subbaiah MV, Kim DS, 2016. Adsorption of methyl orange from aqueous solution by aminated pumpkin seed powder: Kinetics, isotherms, and thermodynamic studies. Ecotoxicology and Environmental Safety, 128:109-117.
• Lacin O, Haghighatnia A, Demir F, Sevim F, 2019. Adsorption Characteristics and Behaviors of Natural Red Clay for Removal of BY28 from Aqueous Solutions. International Journal of Trend in Scientific Research and Development, 3(2):1037-1047.
• Adeyemo AA, Adeoye IO, Bello OS, 2017. Adsorption of dyes using different types of clay: a review. Appl Water Sci, 7(2):543-568.
• Sen TK, Afroze S, Ang HM, 2011. Equilibrium, Kinetics and Mechanism of Removal of Methylene Blue from Aqueous Solution by Adsorption onto Pine Cone Biomass of Pinus radiata. Water Air Soil Pollut, 218(1): 499-515.
• Foo KY, Hameed BH, 2010. Insights into the modeling of adsorption isotherm systems. Chemical Engineering Journal, 156(1): 2-10.
• Banerjee S, Chattopadhyaya MC, 2017. Adsorption characteristics for the removal of a toxic dye, tartrazine from aqueous solutions by a low cost agricultural by-product. Arabian Journal of Chemistry 10(2): S1629-S1638.
• Rabia K, Özer Ç, 2018. Remazol Brillant Blue R (RBBR) boyarmaddesinin düşük maliyetli bir adsorban olan sigara külü ile giderimi. Sakarya University Journal of Science, 22(2): 174-180.
• Food and Agriculture Organization of the United Nations, 2014. E-learning course: Gender in Food and Nutrition Security and Policy and Legislation. Gender Statistics for Informing Policy and Legislation.
• Türkiye İstatistik Kurumu Faaliyet raporu, 2011,https://www.tuik.gov.tr/jsp/duyuru/upload/FR-2011.pdf.
• Küçük İ, 2019. Farklı biyokütlelerden karbondioksit kullanılarak karbon moleküler elek özelliğinde aktif karbon üretimi ve uygulamaları. Doktora Tezi, İnönü Üniversitesi Fen Bilimleri Enstitüsü, İzmir.
• Kalpaklı Y, Toygun Ş, Köneçoğlu G, Akgün M, 2014. Equilibrium and kinetic study on the adsorption of basic dye (BY28) onto raw Ca-bentonite. Desalination and Water Treatment, 52(37-39): 7389-7399.
• Langmuir I, 1918. The adsorption of gases on plane surfaces of glass, mica and platinum. JACS. 40: 1361-1403.
• Freundlich H, 1906. Over the adsorption in solution. J. Phys. Chem. 57: 1100–1107.
• Temkin MI, 1941. Adsorption equilibrium and the kinetics of processes on nonhomogeneous surfaces and in the interaction between adsorbed molecules. Zh. Fiz. Chim.15: 296-332.
• Dubinin MM, Radushkevich, LV, 1947. The equation of the characteristic curve of the activated charcoal. Proceedings of the Academy of Sciences, Physical Chemistry Section, 55: 331–337.