Remediation of Cr(VI)using C₃N₄/DEU-51(Fe)under sun light irradiation

Abstract

A hybrid nanocomposite namely C₃N₄/DEU-51(Fe) was developed to reduce the Cr(VI) from a textile industry wastewater. C₃N₄/DEU-51(Fe) exhibited a good cristalinity. The photocatalytic reaction of the carboxyl groups of the composite is in center and it is associated with the C-H-vibration. The optimal doping content of C₃N₄/DEU-51(Fe) was determined to be 1.2 mg/L to treat 1.6 mg/L Cr(VI) with a maximum yield of 98% at a sun light power of 80 mW/m2 after 15 min at 42 °C in summer. After 5th times sun light experiments, the C₃N₄/DEU-51(Fe) was reused with a yield of 97%. The Cr(VI) reduction was explained with the Langmuir-Hinshelwood (L-H) kinetic model.

Keywords

• Cr(VI),C₃N₄/DEU-51(Fe),Langmuir-Hinshelwood photo-degradation kinetic,Reuse,Sun light

Güneş ışığı altında C₃N₄/DEU-51(Fe) kullanılarak Cr(VI)’nın giderimi

Öz

C₃N₄/DEU-51(Fe) hibrit nanokompoziti bir tekstil endüstrisi atık suyundaki Cr(VI)'yı azaltmak için geliştirilmiştir. C₃N₄/DEU-51(Fe) kristal özellikli olup bu kompozitin merkezindeki karboksil gruplarının fotoparçalanma reaksiyonu C-H bağlanmasıyla ilgilidir. 1.6 mg/L Cr(VI)'yı yaz ayında %98’lik maksimum verimle gidermek için optimum koşullar; 1.2 mg/L C₃N₄/DEU-51(Fe), 15 dk. temas süresi, 80 mW/m2 güneş ışığı şiddeti ve 42 °C sıcaklıktır. C₃N₄/DEU-51(Fe)nanopartikülü 5 kez kullanıldıktan sonra %97 verimle geri kullanılmıştır. Cr(VI) giderimi Langmuir-Hinshelwood (L-H) kinetik modelle açıklanmıştır. Cr(VI) giderimi Langmuir-Hinshelwood (L-H) kinetik modelle açıklanmıştır.

Anahtar Kelimeler

• Cr(VI),C₃N₄/DEU-51(Fe),Langmuir-Hinshelwood foto parçalanma kinetiği,Geri kullanım,Güneş Işığı

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