Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies

Adnan ALDEMİR; Ali Rıza KUL

Makale detayları

Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies

Yazarlar:

Adnan ALDEMİR | Ali Rıza KUL

Yayıncı:

Pamukkale University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Pamukkale University Journal of Engineering Sciences 2020 Vol.26 Issue 7, pp.1335-1342

Belge Tipi:

Makale

Yayın Tarihi:

12/2020

Belge Dili:

İngilizce

Document ID (Org No.):

2000575288

Sıklık:

İki Aylık

eISSN:

2147-5881

pISSN:

1300-7009

Özet:

 

In the present study, natural bentonite and acid-thermal co-modified bentonite were utilized for Acid Blue 25 (AB25) removal. The adsorption experiments were executed at the temperature values of 298K, 308K and 318K. According to the results, Freundlich isotherm becomes more convenient model compared with Langmuir and Temkin model. Freundlich model coefficients rise when the temperature increases. Kinetic coefficients were calculated by pseudo first order (PFO) and pseudo second order (PSO) models. Coefficients of R2 evaluated were higher than 0.99 with experimental and obtained qe values close to each other explained that this process fits PSO kinetic model. The concentration of AB25 elevates from 30 to 80 mg/L adsorption capacity onto natural, acid-thermal co-modified bentonite increases from 8.36 to 27.00 mg/g and 9.30 to 29.09 mg/g for 298 K, respectively. Absolute values of free energy of AB25 onto natural and acid-thermal co-modified bentonite changes from 4.065 kJ/mol to 8.586 kJ/mol, respectively. Enthalpy values of AB25 onto natural and acid-thermal co-modified bentonite changes from 5.483 kJ/mol to 11.249 kJ/mol and entropy values of AB25 on natural and acid-thermal co-modified bentonite changes from 4.759 J/mol K to 8.940 J/mol K, respectively. It was also found that modified bentonite has higher adsorption capacity than natural bentonite.

Makale detayları

Comparison of acid blue 25 adsorption performance on natural and acid-thermal co-modified bentonite: Isotherm, kinetics and thermodynamics studies

Yazarlar: Adnan ALDEMİR | Ali Rıza KUL

Yayıncı: Pamukkale University

Ana Başlıklar: Uygulamalı fizik

Dergi: Pamukkale University Journal of Engineering Sciences 2020 Vol.26 Issue 7, pp.1335-1342

Belge Tipi: Makale

Yayın Tarihi: 12/2020

Belge Dili: İngilizce

Document ID (Org No.): 2000575288

Sıklık: İki Aylık

eISSN: 2147-5881

pISSN: 1300-7009

Sayı

Yazarlar:

Adnan ALDEMİR | Ali Rıza KUL

Yayıncı:

Pamukkale University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Pamukkale University Journal of Engineering Sciences 2020 Vol.26 Issue 7, pp.1335-1342

Belge Tipi:

Makale

Yayın Tarihi:

12/2020

Belge Dili:

İngilizce

Document ID (Org No.):

2000575288

Sıklık:

İki Aylık

eISSN:

2147-5881

pISSN:

1300-7009