Nikel(II) İyonlarının Sulu Çözeltiden Granül Aktif Karbon Üzerine Adsorpsiyonu

Year 2012, Volume: 14 Issue: 2, 1 - 6, 01.12.2012

Fatma Tümsek Belgin Karabacakoğlu

Abstract

Bu çalışmada granül aktif karbon üzerine Ni(II) iyonlarının sulu çözeltiden adsorpsiyonu incelenmiştir. Yapılan çalışmalarda; çözelti pH’ı, denge süresi ve ortam sıcaklığının adsorpsiyon üzerine etkileri incelenmiş; izoterm verilerine Langmuir ve Freundlich izoterm modelleri uygulanarak sabitleri hesaplanmıştır. Kinetik veriler yalancı 1. ve yalancı 2. mertebe modellerine göre analiz edilmiştir. Elde edilen sonuçlara göre, Ni(II) iyonlarının adsorpsiyonunun çözeltinin pH=5 değerinde en yüksek olduğu bulunmuştur. İzotermleri en iyi Langmuir modelinin temsil ettiği, adsorpsiyonun 24 saatte dengeye ulaştığı gözlenmiş ve kinetik verilerin yalancı 2. mertebe modeline daha iyi uyduğu belirlenmiştir

Keywords

Adsorpsiyon, granül aktif karbon, ağır metal, nikel

Adsorption of Nickel(II) Ions from Aqueous Solution onto Granular Activated Carbon

Abstract

In this study, the adsorption of Ni(II) ions from aqueous solution on granular activated carbon was investigated. At the studies, the effects of the pH of solution, equilibrium time and temperature on adsorption were investigated and the isotherm constants were calculated by using Langmuir and Freundlich isotherm models. The kinetic data were analyzed using pseudo first order and pseudo second order models. According to results; it was found that the adsorption of Ni(II) ions was maximum at pH=5. It was observed that adsorption reached equilibrium in 24 hours and the kinetic data well fitted to pseudo second order model

Keywords

Adsorption, granular activated carbon, heavy metal, nickel

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