Harran Ovası Tarım Arazileri Etrafında Bulunan Urfa Taşı’nın Metilen Mavisi Boyar Maddesi Adsorpsiyonu

Year 2018, Volume: 5 Issue: 1, 19 - 30, 28.02.2018

Mehmet Fatih Dilekoğlu

https://doi.org/10.19159/tutad.333988

Abstract

Urfa taşı, düşük maliyetli, yerel olarak bol
bulunan, yüksek verime sahip ve çevreye duyarlı bir adsorbent olarak
kullanılabileceği düşünülerek, atık sudan boyaları uzaklaştırmanın güncel
pahalı yöntemlerine alternatif bir adsorbent olarak incelenmiştir. Bu çalışma ile
Urfa taşının sentetik olarak hazırlanmış atık sulardan metilen mavisi (MB) boyası
uzaklaştırma potansiyeli araştırılmıştır. Laboratuvar deneyleri kesikli olarak
yürütülmüştür. Urfa taşının MB sorpsiyonu performansı, dozaj (0.1, 0.25, 0.5 ve
1 g) ve başlangıç konsantrasyonları (5, 10, 20, 30 ve 40 mg L^-1) ile
hesaplanmıştır. Deneyler farklı pH (3, 5, 7, 8, 8.98 ve 11) değerleri için de gerçekleştirilmiştir.
Adsorpsiyon oranlarının hesaplanması için iki kinetik model (yalancı ikinci
mertebeden ve por difüzyonu) kullanılmıştır. Ayrıca Lagergren eşitliği ile
adsorpsiyonun mekanizması da incelenmiştir. Deneysel veriler, Langmuir,
Freundlich ve Tempkin izoterm modelleri kullanılarak analiz edilmiştir. Elde
edilen neticede Metilen mavisi boyasının Urfa Taşı üzerinde adsorpsiyonunun
Langmuir izotermine tam uyum gösterdiği, kısmen Tempkin izotermine uyduğunu
göstermiştir. Yalancı ikinci mertebe kinetiği ve por difüzyonu mekanizmasının
adsorpsiyonun kinetiğine uygulanabileceği ve intrapartiküler difüzyon hızının
etkili mekanizma olduğu anlaşılmıştır. Adsorpsiyonun kendiliğinden meydana
gelme eğiliminde olduğu, Urfa taşının metilen mavisine doğal ilgisinin
bulunduğu tespit edilmiştir. Urfa taşının doğal, ekonomik ve çevreci bir
adsorbent olarak kullanılabileceği anlaşılmıştır.

Keywords

Adsorpsiyon, metilen mavisi, Urfa taşı, adsorpsiyon mekanizması

Adsorption of Methylene Blue Dye on Urfa Stone Obtained Around at Agriculture Land in Harran Plain

Abstract

Urfa stone has been investigated as an alternative to current expensive methods of removing dyestuffs from
wastewater, considering it can be used as a low cost, locally abundant, high-yielding and environmentally sensitive
adsorbent. In this study, methylene blue (MB) dye removal potential of Urfa stone from the synthetically prepared
wastewater, was investigated. Laboratory experiments were carried out as batches. Urfa Stone’s MB sorption performance
was calculated with dosage (0.1, 0.25, 0.5 and 1 g) and initial concentrations (5, 10, 20, 30 and 40 mg L-1
). Experiments
were also performed for different pH values (3, 5, 7, 8, 8.98 and 11). Two kinetic models (pseudo second - order and pore
diffusion) were used to calculate the adsorption ratios. The mechanism of adsorption by Lagergren equilibrium was also
studied. Experimental data were analyzed using Langmuir, Freundlich and Tempkin isotherm models. As a result, it was
understood that the adsorption of Methylene blue dye on the Urfa Stone was in full agreement with the Langmuir isotherm
and ii partial agreement with the Tempkine isotherm. It was understood that the pseudo second - order kinetics and pore
diffusion mechanisms can be applied to the kinetics of adsorption and the intraparticular diffusion rate was the effective
mechanism. It was observed that the adsorption tends to occur spontaneously and the Urfa stone has a natural affinity to
methylene blue dye. It has been understood that Urfa stone can be used as a natural, economical and environmentally
friendly adsorbent.

Keywords

Adsorption, methylene blue, Urfa stone, adsorption mechanism

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