Preconcentration of Cu(II) Using Isonitrosoacetophenone Anthranoylhydrazone Modified Silica Gel

Abstract

In this study, highly selective and efficient adsorbent, isonitrosoacetophenone anthranoylhydrazone

modified silica gel, was prepared and applied for separation and preconcentration of Cu2+ ion in water samples.

Cu2+ ion and other metal ions were determined by Inductively Coupled Plazma Optical Emission Spectrometry.

The influences of analytical parameters including pH, amount of adsorbent, sample volume, eluent volume, type

of eluent etc. on the quantitative recovery of Cu2+ were investigated. The effects of some alkaline, alkaline earth,

some metal ions and anions on the recoveries of Cu2+ were also examined. Optimum pH value for the adsorption

of Cu2+ was pH 5. 2 mL of 0.5 M H2SO4 solution for Cu2+ was found to be satisfactory for the quantitative elution.

Limit of detection and limit of quantitation was calculated as 0.265 μg L-1 and 0.803 μg L-1 for Cu2+ respectively.

It was observed that adsorption behaviour of Cu2+ ions was fitted to the Langmiur adsorption isotherm better than

the Freundlich isotherm. In order to validate the accuracy of the method for determination of Cu2+ ion, certified

reference material (ground water-BCR 610) was used. The determined values were in good agreement with the

certified values. Proposed separation and preconcentration method was applied to spring, tap and sea water samples.

The recoveries of Cu2+ added to water samples were in between 82-93%.

Keywords

• Cu(II),immobilization,schiff base,silica gel,preconcentration

İzonitrosoasetofenon Antranolhidrazin ile Modifiye Edilmiş Silika Jel Kullanılarak Cu(II) İyonunun Zenginleştirilmesi

Abstract

Bu çalışmada, oldukça seçici ve etkin bir adsorban olan izonitrosoasetofenon antranolhidrazin ile modifiye

edilmiş silika jel hazırlanmış ve su örneklerinden Cu2+ iyonlarının ayırma ve zenginleştirilmesi için uygulanmıştır.

Cu2+ iyonu ve diğer metal iyonları İndüktif Eşleşmiş Plazma Optik Emisyon Spektrometresi ile tayin edilmiştir.

Cu2+ iyonlarının kantitatif geri kazanımı üzerine pH, adsorban miktarı, örnek hacmi, eluent hacmi, eluent türü vb.

analitik parametrelerin etkileri araştırılmıştır. Cu2+ iyonlarının geri kazanımı üzerine bazı alkali, toprak alkali, metal

iyonlarının ve anyonların etkileri de incelenmiştir. Cu2+’ın adsorpsiyonu için optimum pH değeri pH 5’dir. Cu2+ için

2 mL 0.5 M H2SO4 çözeltisi kantitatif elüsyon için uygun bulunmuştur. Cu2+ için gözlenebilme sınırı 0.265 μg L-1,

tayin sınırı 0.803 μg L-1 olarak hesaplanmıştır. Cu2+ iyonlarının adsorpsiyon davranışı, Freundlich izotermine göre

Langmiur izotermine daha iyi uyduğu gözlemlenmiştir. Cu2+ iyonunun tayininde metodun doğruluğunu göstermek

için sertifikalı referans madde (yer altı suyu-BCR 610) kullanılmıştır. Belirlenen değerler sertifika değerleri ile

uyumlu olduğu bulunmuştur. Önerilen ayırma ve zenginleştirme metodu kaynak, çeşme ve deniz suyu örneklerine

uygulanmıştır. Su örneklerine eklenen Cu2+ iyonlarının geri kazanımları % 82-93 aralığında bulunmuştur.

Keywords

• Cu(II),immobilizasyon,schiff bazı,silika jel,zenginleştirme

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