Pirazin Sübstitüe Kaliks[4]arenin Bazı Toksik Metal ve Oksianyon Ekstraksiyon Özelliklerinin İncelenmesi

Bu çalışmada, kaliks[4]arenin pirazin-2-karboksilat türevi (3) sentezlenmiş ve yapısı spektroskopik yöntemler ilekarakterize edilmiştir. Ayrıca, bu bileşik büyük çevresel problemlere sebep olan toksik özelliğe sahip metaller(Na+, K+, Co2+, Ni2+, Cu2+, Cd2+, Pb2+ ve Hg2+) ve oksianyonların’ın (kromat ve arsenat) sıvı-sıvı ekstraksiyonçalışmalarında kullanılmıştır. Ekstraksiyon sonuçlarına göre düşük pH larda kromat (pH=1,5) ve arsenat (pH=3,5)anyonlarının yüksek oranda sulu fazdan organik faza taşındığı görülmüştür. Kaliksaren türevi (3) ile oksianyonlararasındaki kompleks oranı Job’s Plot analiz yöntemi ile 1:1 olarak tespit edilmiştir. Ayrıca Bileşik 3, çalışılantoksik metalleri ise yüksek oranda sulu fazdan organik faza taşımıştır.

Investigation of Some Toxic Metal and Oxyanion Extraction Properties of Pirazine Substituted Calix[4]arene

In this study, pyrazine-2-carboxylate derivative of calix[4]arene was synthesized and the structure was characterized by spectroscopic methods. In addition, this compound was used as carrier in the liquid-liquid extraction studies for toxic metals and oxyanions (chromate and arsenate) which cause major environmental problems. According to the extraction results, it was observed that the chromate (pH = 1.5) and arsenate (pH = 3.5) anions were removed from the waste water at low pH levels. The stoichiometric complex ratio between calixarene derivative (3) and oxyanions was estimated through Job’s Plot and it was found to be 1: 1. Also, compound 3 carried the studied toxic metals from the aqueous phase to the organic phase.

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