Synthesis and Characterization of Barium Ferrite Containing Magnetic Affinity Microbeads and Isotherm Analysis of Cr VI Ions Adsorption from Aqueous Solutions

Year 2014, Volume: 42 Issue: 3, 299 - 312, 01.09.2014

Ali Kara Emel Demirbel Hüseyin Sözeri İlker Küçük Hüseyin Ovalıoğlu

Abstract

In this study, barium ferrite BaFe12O19 containing metal-chelate microbeads, hard-mag-poly ethylene glycol dimethacrylate-n-vinyl imidazole [h-mag-poly EGDMA–VIM ] average diameter 53–212 μm , were synthesi- zed and characterized. Their usage as an adsorobent in removal of Cr VI ions from aqueous solutions was investigated. The h-mag-poly EGDMA–VIM microbeads were prepared by copolymerizing of ethylene glycol dimethacrylate EGDMA with n-vinyl imidazole VIM and were characterized by elemental analysis, scanning electron microscopy, X-ray powder diffractometry vibrating magnetization measurements and swelling studies. The adsorption potential of microbeads for Cr VI ions from aqueous solutions was investigated. They exhibited the highest Cr VI ions adsorption capacity at pH 2.0 and adsorbent dosage of 50 mg. To predict the adsorp- tion isotherms and to determine the characteristic parameters for process design, seven single and two para- meter isotherm models were applied to experimental data. Three error analysis methods were used to evaluate the experimental data. Correlation coefficient, standard error, and sum of squares error of the estimate were to find the best fitting isotherm.

Keywords

Magnetic polymers, Adsorption isotherms, Cr VI ions

Baryum Ferit İçeren Manyetik Afinite Mikrokürelerin Sentezi, Karakterizasyonu ve Sulu Çözeltilerden Cr VI İyonlarının Adsorpsiyon İzotermlerinin Analizi

Abstract

S unulan bu çalışmada, barium ferrit içeren sert-manyetik-poli etilen glikol dimetakrilat-n-vinil imidazol [h-mag-poly EGDMA–VIM ] metal-şelat mikroküreleri ortalama çap 53-212 µm sentezlendi ve karakterize edildi. h-mag-poly EGDMA–VIM mikroküreleri etilen glikol dimetakrilat ile n-vinil imidazolün kopolimerizasyonu ile hazırlandı ve elementel analiz, taramalı elektron mikroskobu, titreşimli mıknatıslanma ölçümleri ve şişme çalışmalarıyla karakterize edildi. Sulu çözeltilerden Cr VI iyonları için mikrokürelerin adsorpsiyon potansiyelleri araştırıldı. pH=2 ve adsorbent miktarı=50 mg’da en yüksek Cr VI adsorpsiyon kapasitesi elde edildi. Adsorpsiyon izotermlerini tahmin etmek ve karakteristik parametrelere karar vermek için yedi tek ve ikili parametre izoterm modelleri uygulandı. Üç hata analiz yöntemi, korelasyon katsayısı, standart hata ve hata kareleri toplamı, en uygun izotermi bulmada deneysel verileri değerlendirmek için kullanıldı

Keywords

Manyetik polimerler, adsorpsiyon izotermleri, Cr VI iyonları

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