Çevre ve Atık Su Örneklerinde Bakır İyonlarının Tayini İçin Kolorimetrik Sensör Geliştirilmesi

Abstract

In this study, a mesoporous chemosensor was developed for colorimetric detection and removal of Cu(II) ions from water samples. Mesoporous silica was prepared under basic condition by using hexadecyltrimethylammoniumbromide as template and sodium silicate solution as the silica source by means of sol–gel method. Mesoporous silica particles were modified with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (PADAP) and used as a colorimetric adsorbent (Si-PADAP) for detection and removal of Cu(II) ions. The resulting material (Si-PADAP) has been characterized by FT-IR, SEM, EDX, nitrogen gas sorption, thermogravimetry and elemental analysis. The adsorption behaviour of Cu(II) ions on the Si-PADAP particles was evaluated. The experimental conditions were optimized based on contact time, solution pH, initial Cu(II) concentration and diverse metal salt concentrations. Under the optimum conditions, maximum adsorption capacity of Si-PADAP particles was found to be 36.7 mg g for Cu(II).