Sains Malaysiana 39(4)(2010): 587–591

Decolorization of Reactive Orange 16 Dye by Copper Oxide System

(Penyahwarnaan Pewarna Reaktif Jingga 16 oleh Sistem Kuprum Oksida)

Abdul Halim Abdullah* & Wan-Yuan Wong

Department of Chemistry, Faculty of Science, Universiti Putra Malaysia

43400, UPM Serdang, Selangor, Malaysia

Mohd Ismail Yaziz

Faculty Environmental Studies, Universiti Putra Malaysia

43400, UPM Serdang, Selangor, Malaysia

Diserahkan: 14 Ogos 2009 / Diterima: 18 Januari 2010

ABSTRACT

The decolorization of reactive orange 16 dye (RO16) from aqueous solution by CuO/H2O2 was investigated. The amount of dye removed was determined by measuring the concentration of the dye at its characteristic wavelengths by UV-Vis spectrophotometer. The effects of CuO dose, H2O2 concentration and UV light on the decolorization of the dye were investigated. It was found that the removal rate increased with increasing mass of CuO and increasing concentration of H2O2. The combination of CuO, H2O2 and UV light was the best system with dye removal of 100% after 6 h. The removal efficiency observed was in the order: CuO/UV/H2O2 > CuO/H2O2 > CuO/UV = CuO > UV/H2O2 > H2O2 > UV.

Keywords: Copper oxide; decolorization; dye; H2O2; UV light

ABSTRAK

Penyahwarnaan pewarna reaktif jingga16 (RO16) daripada larutan akueus oleh CuO/H2O2 telah dikaji. Jumlah pewarna yang disingkirkan telah ditentukan dengan mengukur kepekatan pewarna pada panjang gelombang ciri menggunakan spektrofotometer UV-nampak. Kesan dos CuO, kepekatan H2O2 dan cahaya UV ke atas penyahwarnaan pewarna telah dikaji. Kadar penyingkiran didapati meningkat dengan peningkatan jisim CuO dan kepekatan H2O2. Kombinasi CuO, H2O2 dan cahaya UV adalah sistem terbaik dengan penyingkiran 100% pewarna selepas 6 jam. Kecekapan penyingkiran adalah mengikut turutan: CuO/UV/H2O2 > CuO/H2O2 > CuO/UV = CuO > UV/H2O2 > H2O2 > UV.

Kata kunci: Cahaya UV; H2O2; kuprum oksida; penyahwarnaan; pewarna

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*Pengarang untuk surat-menyurat; email: halim@science.upm.edu.my