tailieunhanh - Báo cáo vật lý: "Decolourisation of Reactive Orange 16 by Activated Carbon and Copper Oxide Catalysts Supported by Activated Carbon"

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Decolourisation of Reactive Orange 16 by Activated Carbon and Copper Oxide Catalysts Supported by Activated Carbon | Journal of Physical Science Vol. 21 2 29-40 2010 29 Decolourisation of Reactive Orange 16 by Activated Carbon and Copper Oxide Catalysts Supported by Activated Carbon Abdul Halim Abdullah1 Wong Wan Yuan1 and Mohd. Ismail Yaziz2 department of Chemistry Faculty of Science 2Faculty of Environmental Studies Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia Corresponding author halim@ Abstract Decolourisation of Reactive Orange 16 RO16 dye by HNO3-modified activated carbons ACs and a copper oxide catalyst supported by modified AC Cu-Ac were investigated. The percentage of colour removal for AC modified with 12 M HNO3 acid 19 was found to be lower than that of AC modified using 4 M and 8 M HNO3 which are 23 and 22 respectively. The Cu-AC prepared by impregnating the 4 M HNO modified AC with copper nitrate solution for a 5 wt of Cu followed by calcination at 500 C in an N2 atmosphere shows the highest percentage of removal 63 compared to the modified and the heat-treated modified AC. Decolourisation of RO16 by the Cu catalyst increases in the presence of H2O2 and UV-light. The decolourisation efficiency of the catalyst under four different conditions was observed to have the following order Cu-AC H2O2 UV Cu-AC H2O2 Cu-ACN UV Cu-AC. Keywords modified activated carbon copper catalyst decolourisation Reactive Orange 16 Abstrak Penyahwarnaan pewarna Reaktif Jingga 16 RO16 oleh karbon aktif AC terubah suai dengan HNO3 dan mangkin kuprum oksida terdokong di atas AC terubah suai telah dikaji. Peratus penyingkiran warna oleh AC yang diubah suai dengan 12 M asid HNO3 19 didapati lebih rendah daripada AC yang diubah suai dengan 4 M dan 8 M asid HNO3 iaitu masing-masing 23 dan 22 . Cu-Ac yang disediakan dengan mengimpregnasi 4 M HNO3- AC terubah suai dengan larutan kuprum nitrat untuk memberi 5 wt Cu diikuti dengan pengkalsinan pada 500 C di bawah atmosfera N2 menunjukkan peratus penyingkiran tertinggi 63 dibandingkan dengan AC terubah suai dan AC .