Songül UÇAR, Atilla EVCİN, Mustafa UÇAR, Rafiğ ALİBEYLİ, Marek MAJDAN

Aktive Edilmiş Klinoptilolit Kullanılarak Sulu Ortamdan Fenol ve Klorofenollerin Uzaklaştırılması

İ nsanlar açısından zehirli olması nedeniyle suyun kimyasal kirliliği çok geniş toksik bileşiklerden dolayı, özellikle aromatik moleküller, ciddi bir çevresel problemdir. Bu çalışmada, Manisa-Gördes bölgesinden alınan AMGC aktive edilmiş klinoptilolit, fenol ve klorofenollerin o-klorofenol, m-klorofenol ve p-klorofenol uzaklaştırılmasında araştırılmıştır. Klinoptilolit, FT-IR, TG/DTA, BET yüzey alanı, SEM, XRD ve XRF metodları yardımıyla karakterize edilmiştir. Fenol ve klorofenollerin adsorpsiyon hızları çok yüksektir ve yaklaşık 45 dakikada dengeye ulaşmıştır. Klinoptilolit üzerine fenol ve klorofenollerin maksimum adsorpsiyonu, fenol için 7.977 mg/g, o-klorofenol için 9.846 mg/g, m-klorofenol için 9.981 mg/g ve p-klorofenol için 8.241 mg/g’dır. Adsorbant dozajı, pH ve başlangıç derişimi gibi çeşitli parametrelerin etkisi optimize edilmiştir. Fenol ve klorofenollerin adsorpsiyon değerleri pH arttıkça azalmıştır. Fenol ve klorofenollerin desorpsiyonu için %30 v/v ’luk etanol çözeltisi kullanılmıştır. Fenol ve klorofenollerin adsorpsiyon hızları pH 6.25’de maksimum olarak bulunmuştur. Fenol ve klorofenoller için denge adsorpsiyon verileri, Freundlich ve Langmuir adsorpsiyon izotermleri kullanılarak analiz edilmiştir. En uygun modelin Freundlich adsorpsiyon izotermi olduğu bulunmuştur

Anahtar Kelimeler:

Klinoptilolit, fenollerin uzaklaştırılması, aktivasyon, adsorpsiyon izotermleri ve kinetik

Removal of Phenol and Chlorophenols from Aquatic System Using Activated Clinoptilolite

Chemical contamination of water from a wide range of toxic compounds, in particular aromatic molecules, is a serio- us environmental problem owing to their potential human toxicity. In this study, activated clinoptilolite from Manisa- Gördes region AMGC was investigated for removal of phenol and chlorophenols i.e. o-chlorophenol, m-chlorophenol and p-chlorophenol . AMGC was characterized by FT-IR, TG/DTA, BET Surface Area, SEM, XRD, and XRF methods. Adsorption rates of phenol and chlorophenols were very high, and equilibrium was achieved in about 45 min. The maximum adsorptions of phenol and chlorophenols onto the AMGC were 7.977 mg/g for phenol, 9.846 mg/g for o-chlorophenol, 9.981 mg/g for m-chlorophenol, and 8.241 mg/g for p-chlorophenol. The effect of various parameters like adsorbent dose, pH and initial concentration were studied for their optimization. The adsorption values of phenol and chlorophenols decreased with incre- asing pH. Desorption of phenol and chlorophenols was achieved using ethanol solution 30%, v/v . The rate of adsorption of phenol and chlorophenols were found to be maximum at pH 6.25. Equilibrium adsorption data for phenol and chlorophenols were analyzed by using Freundlich and Langmuir adsorption isotherms. It was found that Freundlich adsorption isotherm is the most suitable model.

Keywords:

Clinoptilolite removal of phenols, activation, Adsorption isotherms, kinetics,

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