Mustafa UÇAR, Kübra ERÇOLAK, Songül UÇAR

Cibacron Blue F3GA Bağlı mPHEMA ile Sulu Sistemden Fenol ve Nitrofenollerin Uzaklaştırılması

Fenol ve nitrofenoller, çok düşük konsantrasyonlarda bile sulu ortamdaki diğer organizmalar için toksiktir. Bu çalışmada, sulu ortamdan bir adsorban olarak manyetik poli (2-hidroksietilmetakrilat) bağlı Cibacron Blue F3GA kullanılarak fenollerin ve nitrofenollerin uzaklaştırılması araştırıldı. Farklı zaman aralıklarında (15, 20, 45, 60, 90 ve 120 dakika) adsorban üzerindeki fenol ve nitrofenollerin adsorpsiyon miktarı, artan fenol ve nitrofenol konsantrasyonu ile denge süreleri araştırıldı. pH (2-12 arasında), adsorban dozaj, adsorpsiyon süresi ve başlangıç konsantrasyonu gibi parametreler araştırıldı. Maksimum adsorpsiyon denge süresi yaklaşık 20 dakika olarak bulunmuştur. Adsorban üzerindeki adsorbe edilen madde miktarının, 4-nitrofenol> 3-nitrofenol> ve 2-nitrofenol> fenol sırasıyla azaldığı gözlendi. Adsorban, adsorpsiyon öncesi ve sonrasında Fourier Transform Infra-Red, Taramalı Elektron Mikroskopisi-Enerji Dağıtıcı X-ışını teknikleri ve Diferansiyel Termal Analiz-Termal Gravimetrik Analiz Teknikleri kullanılarak incelenmiştir. Adsorpsiyon işleminin Langmuir izotermine uygun olduğu gözlenmiştir. Adsorpsiyon kapasitelerinde önemli bir azalma olmadan tekrar tekrar Cibacron Blue F3GA'ya takılı mPHEMA mikrokürelerin kullanılması mümkün olmuştur.

Anahtar Kelimeler:

Adsorption, phenols, wastewater, mPHEMA, Cibacron Blue F3GA

Removal of Phenol and Nitrophenols from Aquatic System With Cibacron Blue F3GA Attached mPHEMA

Phenol and nitrophenols are toxic to other organisms in aqueous media even at very low concentrations. In this work, the removal of phenols and nitrophenols by using Cibacron Blue F3GA attached of magnetic poly(2-hydroxyethylmethacrylate) as an adsorbent from the aqueous media was investigated. The adsorption phenomenon of the phenol and nitrophenols on adsorbent at different time ranges (15, 20, 45, 60, 90 and 120 minutes) was investigated to elucidate the equilibrium times with increasing phenol and nitrophenols concentration. The effects of different conditions such as pH (2-12), adsorbent dosage, adsorption time and initial concentration were studied. The adsorption rates of phenol and nitrophenols were established to be the maximum at pH 2. The maximum adsorption equilibrium time was found to be approximately 20 minutes. The amount of adsorbed substance on adsorbent was observed to decrease in the order of 4-nitrophenol> 3-nitrophenol> and 2-nitrophenol> phenol. Adsorbent was examined by using Fourier Transform Infra-Red, Scanning Electron Microscopy-Energy Dispersive X-ray techniques and Differential Thermal Analysis-Thermal Gravimetric Analysis before and after the adsorption. The adsorption process was observed to comply with the Langmuir isotherm. It was possible to use again and again Cibacron Blue F3GA‐attached mPHEMA beads without any significant decreases in their adsorption capacities.

Keywords:

Adsorption, phenols, wastewater,

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