Mustafa UÇAR, Dilek KAYIRAN, Atilla EVCİN

Modifiye Nanobentonitle Sulu Ortamdan Fenol ve 4-KlorofenolünGiderilmesi

Son yıllarda endüstri ve tarımda kullanılan kimyasal ve ilaçlar deşarj edildikleri ortamlarda tüm canlılar için zararlı olmayabaşlamıştır. Çevre koruma ajansları ve belediye gibi kurumların bu konudaki hazırladıkları yönetmeliklerle zararlı kimyasallarsınıflandırılmış ve atık sularda bulunabilecek minimum derişimler belirlenmiştir. Bu sınır değerler dışında kalan atık sular içinsaflaştırma ve arıtma prosesleri zorunlu hale gelmiştir. Çalışmamızda fenol (P) ve 4-klorofenolün (4-CP) modifiye alkil amonyumnanobentonit (MANB) ile kesikli sistemde, sulu çözeltiden giderimi araştırılmıştır. P ve 4-CP adsorplanmasında denge zamanı,konsantrasyon, pH etkisi, adsorbent dozaj etkisi ve desorpsiyonu incelenmiştir. Adsorplanan miktarı; P için 4,69 mg/g, 4-CP için 6,18mg/g olarak elde edilmiştir. Denge zamanı 45 dak. olup adsorbentin desorpsiyonu % 30 (v/v)’ luk etil alkol ortamında yapılmıştır.Adsorpsiyon deneyleri 25, 35 ve 45C değişik sıcaklık aralıklarında yapılmıştır. Örneklerin kimyasal yapı, termal ve morfolojikkarakterizasyonu başlangıçta ve adsorpsiyondan sonra yapılmıştır. Çalışılan maddelerin başlangıç derişiminin MANB mikrokürelerinLangmuir ve Freundlich adsorpsiyon izoterm modellerine uygunluğu incelenmiştir.

Removal of Phenol and 4-Chlorophenol from Aqueous Environment with Modified Nanobentonite

In recent years, chemicals and drugs used in industry and agriculture have started to be harmful to all living things in theenvironments in which they are discharged. With the regulations prepared by environmental protection agencies and municipalities,hazardous chemicals are classified and minimum concentrations in wastewater are determined. Purification and purification processeshave become mandatory for wastewater outside these limit values. In our study, the removal of phenol (P) and 4-chlorophenol (4-CP)with modified alkyl ammonium nanobentonite (MANB) from the aqueous solution was investigated. Balance time, concentration, pHeffect, adsorban dosage effect and desorption were investigated in P and 4-CP adsorption. Adsorbed amount; 4.69 mg/g for P and 6.18mg/g for 4-CP. Balance time 45 min. and the adsorbent desorption was performed in 30% (v/v) ethyl alcohol medium. Adsorptionexperiments were carried out at different temperature ranges of 25, 35 and 45C. Chemical structure, thermal and morphologicalcharacterization of samples were performed at the beginning and after adsorption. The suitability of the initial concentrations of thestudied substances to the MANB microspheres was investigated for Langmuir and Freundlich adsorption isotherm models.

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