Isotherm and Thermodynamic Calculations of Adsorption Method for Removal of Crystalline Violet Dyestuffs from Wastewater Using Koçpınar/Siirt Clay

Ali Rıza Kul; Veysel Benek

Makale detayları

Isotherm and Thermodynamic Calculations of Adsorption Method for Removal of Crystalline Violet Dyestuffs from Wastewater Using Koçpınar/Siirt Clay

Yazarlar:

Ali Rıza Kul | Veysel Benek

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Fiziksel Kimya

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 3, pp.590-601

Belge Tipi:

Makale

Yayın Tarihi:

6/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001294434

pISSN:

2149-3367

Anahtar kelimeler:

Özet:

 In our research, it was tried to remove crystal violet, one of the dyestuffs known to be carcinogenic, from aqueous solutions with SiirtKoçpınar clay. In the first stage, the clay was used in its natural state KO without being modified, and in the second stage, the same processes were repeated with SiirtKoçpınar clay KA activated with HNO3. As a result of adsorption, the data were applied to D-R, Langmuir and Freundlich isotherm models. As a result of the calculations, the best efficiency was obtained in pH 5 environment with 0.4 g adsorbent dosage. As a result of the study, 59.48 removal was achieved for KO adsorbent and 83.97 for KA adsorbent. The Freundlich isotherm model, in which the correlation coefficient was calculated as greater than 0.99, showed that our adsorption study was suitable for this model. In addition, the D-R adsorption free energy found for the D-R isotherm model was found to be less than 8 kJmol for both natural and activated clay. This result showed that the adsorption process is physical. The negative Gibbs free energy values calculated as a result of thermodynamic calculations showed us that our work occurred spontaneously.

 In our research, it was tried to remove crystal violet, one of the dyestuffs known to be carcinogenic, from aqueous solutions with SiirtKoçpınar clay. In the first stage, the clay was used in its natural state KO without being modified, and in the second stage, the same processes were repeated with SiirtKoçpınar clay KA activated with HNO3. As a result of adsorption, the data were applied to D-R, Langmuir and Freundlich isotherm models. As a result of the calculations, the best efficiency was obtained in pH 5 environment with 0.4 g adsorbent dosage. As a result of the study, 59.48 removal was achieved for KO adsorbent and 83.97 for KA adsorbent. The Freundlich isotherm model, in which the correlation coefficient was calculated as greater than 0.99, showed that our adsorption study was suitable for this model. In addition, the D-R adsorption free energy found for the D-R isotherm model was found to be less than 8 kJmol for both natural and activated clay. This result showed that the adsorption process is physical. The negative Gibbs free energy values calculated as a result of thermodynamic calculations showed us that our work occurred spontaneously.

 In our research, it was tried to remove crystal violet, one of the dyestuffs known to be carcinogenic, from aqueous solutions with SiirtKoçpınar clay. In the first stage, the clay was used in its natural state KO without being modified, and in the second stage, the same processes were repeated with SiirtKoçpınar clay KA activated with HNO3. As a result of adsorption, the data were applied to D-R, Langmuir and Freundlich isotherm models. As a result of the calculations, the best efficiency was obtained in pH 5 environment with 0.4 g adsorbent dosage. As a result of the study, 59.48 removal was achieved for KO adsorbent and 83.97 for KA adsorbent. The Freundlich isotherm model, in which the correlation coefficient was calculated as greater than 0.99, showed that our adsorption study was suitable for this model. In addition, the D-R adsorption free energy found for the D-R isotherm model was found to be less than 8 kJmol for both natural and activated clay. This result showed that the adsorption process is physical. The negative Gibbs free energy values calculated as a result of thermodynamic calculations showed us that our work occurred spontaneously.

 Araştırmamızda, kanserojen etkisi de bilinen boyar maddelerden biri olan kristal viyoletin sulu çözeltilerden SiirtKoçpınar kili ile uzaklaştırılması çalışıldı. Birinci aşamada kil modifikasyona maruz bırakılmadan doğal şekliyle KO kullanıldı, ikinci aşamada ise aynı işlemler HNO3 ile aktifleştirilen SiirtKoçpınar kili KA ile tekrar edildi. Adsorpsiyon neticesinde veriler D-R, Langmuir ve Freundlich izoterm modellerine uygulandı. Hesaplamalar sonucunda en iyi verim, 0.4 g adsorbent dozajı ile pH 5 ortamında elde edildi. Çalışma neticesinde optimum koşullarda KO adsorbenti için  59.48, KA adsorbentin de  83.97 giderim sağlandı. Korelasyon katsayısının 0.99dan büyük olarak hesaplandığı Freundlich izoterm modeli, çalışmamızın uygun olduğu izoterm modeli oldu. Ayrıca D-R izoterm modeli için bulunan D-R adsorpsiyon serbest enerjisi, hem doğal hem de aktifleştirilmiş kil için 8 kJmol değerinden küçük bulundu. Bu sonuç adsorpsiyon işleminin fiziksel olduğunu gösterdi. Termodinamik hesaplamalar neticesinde hesaplanan Gibbs serbest enerji değerlerinin sıfırdan küçük çıkması bizlere çalışmamızın istemli meydana geldiğini gösterdi.

Makale detayları

Isotherm and Thermodynamic Calculations of Adsorption Method for Removal of Crystalline Violet Dyestuffs from Wastewater Using Koçpınar/Siirt Clay

Yazarlar:

Ali Rıza Kul | Veysel Benek

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Fiziksel Kimya

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 3, pp.590-601

Belge Tipi:

Makale

Yayın Tarihi:

6/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001294434

pISSN:

2149-3367

adsorption

thermodynamic

clay

Dyestuff

isothermadsorpsiyon

izoterm

kil

boyar madde

termodinamik

Sayı

Makale detayları

Yazarlar: Ali Rıza Kul | Veysel Benek

Yayıncı: Afyon Kocatepe University

Ana Başlıklar: Fiziksel Kimya

Dergi: Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 3, pp.590-601

Belge Tipi: Makale

Yayın Tarihi: 6/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001294434

pISSN: 2149-3367

Sayı

Yazarlar:

Ali Rıza Kul | Veysel Benek

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Fiziksel Kimya

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 3, pp.590-601

Belge Tipi:

Makale

Yayın Tarihi:

6/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001294434

pISSN:

2149-3367