The evolution of removal mechanism of chlortetracycline by nanoscale zero valent iron from aqueous solution

Yıl 2017, , 1000 - 1007, 01.10.2017

Hande Türk , Özge Hanay

https://doi.org/10.16984/saufenbilder.270688

Cited By: 1

Öz

In this study,
the removal mechanism of chlortetracycline (CTC) by nanoscale zero valent iron
(nZVI) from the aqueous solutions. Experimental variables such as solution pH,
nZVI dosage, contact time and reaction temprature were systematically studied
and the degradation products of CTC were determined at optimum operating
conditions which provided to maximum CTC removal percentages. Adsorption
behavior depended pH and maximum removal of CTC occured at pH 6. The optimum
dosage was 0,4 g/L because there was no significant removal efficiency when
nZVI dosage was between 0,4-0,6 g/L. Adsorption kinetics exhibited that
equilibrium was reached within 2 h following the pseudo-second order model.

Anahtar Kelimeler

Nanoscale zero valent iron (nZVI), Chlortetracycline (CTC), Adsorption

Nano boyutlu sıfır değerlikli demir ile sulu ortamlarda klortetrasiklin giderim mekanizmasının incelenmesi

Öz

Bu çalışmada
kimyasal indirgeme yöntemi ile hazırlanan nano ölçekli sıfır değerlikli demir
(nZVI) ile klortetrasiklinin (CTC) sulu ortamlardaki giderim mekanizması
incelenmiştir. Çözelti pH’ı, nZVI dozajı, temas süresi ve reaksiyon sıcaklığı
sistematik olarak incelenmiş ve maksimum klortetrasiklin gideriminin
gerçekleştiği optimum işletme şartlarında klortetrasiklin parçalanma ürünleri
belirlenmiştir. Adsorpsiyon davranışının pH’a bağlı olduğu tespit edilmiş  ve klortetrasiklinin maksimum giderim verimi
pH 6’ da gerçekleşmiştir. 0,4-0,6 g/L aralığındaki nZVI dozajlarında giderim
veriminde önemli değişiklik gözlenmediği için optimum dozaj 0,4 g/L olarak
belirlenmiştir. Adsorpsiyon kinetiğinin 2 saat içerisinde dengeye ulaştığı ve
yalancı ikinci dereceden hız modeline uyduğu belirlenmiştir.

Anahtar Kelimeler

Nano ölçekli sıfır değerlikli demir (nZVI), Klortetrasilkin (CTC), Adsorpsiyon

Kaynakça

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