Nonlinear Regression Analysis of the Adsorption of Basic Green-5 from Aqueous Solutions onto a Low-Cost Biodegradable Adsorbent Material

Yıl 2021, Sayı: 31, 134 - 140, 31.12.2021

Dilek Özmen , Özlem Yıldırım

https://doi.org/10.31590/ejosat.1004444

Öz

Industrial wastewater containing dyes is a main reason for the pollution of water resources. These dyes are toxic and may threaten ecosystems and the human health and they are resistant to sunlight and to high temperature. Worldwide production of dyes in textile, leather, pharmaceuticals and other large industries such as food, constitutes 10,000 different dyes and pigments with an amount of 8 × 105 tons annually. Nowadays, several physical and chemical methods and technologies are used for the purification process of wastewater before it is discharged to the environment, moreover these methods can be improved. In this study, removal of basic green-5 dye from aqueous solutions by calcined eggshell (ES) through the adsorption process is analyzed. The experiments were carried out at 25, 35, 45oC. Experiments were carried out for four different initial concentration values of the dye. Also, surface fitting plots were created to show the effect of the amount of the eggshell waste, pH and temperature on adsorption. BET surface area and SEM analyzes were performed for calcined ESs. Non-linear regression analysis was applied for Baudu and Fritz-Schlunder Isotherms. Obtained results indicate that the calcined ES can be considered as a good, cheap alternative for this adsorption.

Anahtar Kelimeler

Adsorption, Basic Green-5 Dye (BG5), Biodegradable adsorbent, Calcined eggshell, nonlinear adsorption isotherm

Destekleyen Kurum

Scientific Research Projects Coordination Unit of Istanbul University

Proje Numarası

Project number 55671 and YADOP/10662

Teşekkür

This work was a part of the project supported by Scientific Research Projects Coordination Unit of Istanbul University. Project number 55671 and YADOP/10662

Bazik Yeşil-5'in Sulu Çözeltilerden Düşük Maliyetli Biyobozunur Bir Adsorban ile Adsorpsiyonunun Doğrusal Olmayan Regresyon Analizi

Öz

Boya içeren endüstriyel atık sular, su kaynaklarının kirlenmesinin ana nedenidir. Bu boyalar toksik olup, ekosistemleri ve insan sağlığını tehdit edebilirler. Ayrıca, güneş ışığına ve yüksek sıcaklığa dayanıklıdır. Tekstil, deri, ilaç ve gıda gibi büyük endüstrilerdeki boyaların dünya çapında üretim miktarı, yıllık 8×105 ton olup, 10.000 farklı tür boya ve pigmentten oluşmaktadır. Günümüzde atıksuların çevreye deşarj edilmeden önce kirlilikten arındırılması için çeşitli fiziksel ve kimyasal yöntem ve teknolojiler kullanılmaktadır, ayrıca bu yöntemler geliştirilebilirler. Bu çalışmada, kalsine yumurta kabuğu (YK) ile sulu çözeltilerden basic green-5 boyasının adsorpsiyon işlemi ile uzaklaştırılması araştırılmıştır. Deneyler 25, 35, 45oC'de gerçekleştirilmiştir. Boyanın dört farklı başlangıç konsantrasyonu için deneyler yapılmıştır. Ayrıca yumurta kabuğu miktarı, pH ve sıcaklığın adsorpsiyon üzerindeki etkisini göstermek için yüzey uydurma grafikleri oluşturulmuştur. Kalsine edilen YK'ları için BET yüzey alanı ve SEM analizleri yapılmıştır. Baudu ve Fritz-Schlunder İzotermleri için doğrusal olmayan regresyon analizi uygulanmıştır. Elde edilen sonuçlar, kalsine YK'nun bu adsorpsiyon için iyi ve ucuz bir alternatif olarak kabul edilebileceğini göstermektedir.

Anahtar Kelimeler

Adsopsiyon, Bazik Yeşil-5, Biyobozunur adsorban, Kalsine yumurta kabuğu, Doğrusal olmaya adsorpsiyon isotermleri.

Proje Numarası

Project number 55671 and YADOP/10662

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