Papers by Che Zulzikrami Azner Abidin
The oxidative degradation of the azo dye Reactive Red 120 by ozonation was investigated. The
deco... more The oxidative degradation of the azo dye Reactive Red 120 by ozonation was investigated. The
decolourization was carried out by bubbling ozone at the bottom of a bubble column reactor containing the dye
solution. The colour, chemical oxygen demand, and total organic carbon removal were evaluated, and the contaminants
were characterized based on the changes in UV-Vis and FT-IR spectra. It was observed that changes of UV-Vis spectra
represent the disappearance of both azo and aromatic groups, which causes the colour removal. FT-IR analysis indicated
that ozonation shifts the functional groups in the azo dye which results in decolourization, a decrease in aromaticity,
and an increase in acidity. The results indicate that the chromophore is destroyed and partially mineralized to small
fragments during ozonation. The alkaline pH was favourable to decomposition by ozonation, initiated by the formation
of the hydroxyl radicals. The oxidation followed first-order kinetics and the completed decolourization confirmed the
capability of ozonation to cleave the azo bond from the dye.
Lawatan industri ke Continental Sime Tyre
dspace.unimap.edu.my
X-WASTE BRICK: Novel Brick from Waste
X-waste brick is high silica waste material composed from palm ash, cement, sand and automotive w... more X-waste brick is high silica waste material composed from palm ash, cement, sand and automotive waste. Brick produced has variety of useful benefit. X-waste brick are formulated from waste materials which exhibits high strength and almost 100% x-ray radiation proof. Volume friction of ...
ijesd.org
In this study, decolourization and COD removal of Reactive Red 120, Remazol Brilliant Blue, React... more In this study, decolourization and COD removal of Reactive Red 120, Remazol Brilliant Blue, Reactive Green 19 and Reactive Black 5 by ozonation and biological treatment were evaluated to apply for wastewater treatment containing azo dye. The performance of COD and colour removal in the single-stage ozonation-biological treatment was also compared with the multi-stage ozonation-biological treatment processes. Ozonation transforms the functional groups in azo dye to produce more biodegradable by products, which is easily removed by biological treatment. Ozonation is efficient for decolourization of Reactive Red 120, Remazol Brilliant Blue, Reactive Green 19 and Reactive Black 5 even with lower ozone dose (0.3 mg O 3 . mg dye -1 ). Contrarily, significant decreased in COD concentration was only observed within higher range of ozone doses (1.2 mg O 3 . mg dye -1 ). Higher COD removal at high ozone dose was due to complete oxidation of azo dye. The result indicated that biodegradable fraction of COD could be further oxidized and completely removed by ozonation. COD removal for Reactive Red 120 in the single stage ozonation-biological treatment and ozonation-biological treatment that repeated for 4 times were 58 % and 75 % respectively. The improvement of COD removal in the multi-stage ozonation-biological treatment was attributed to the production of biodegradable fraction of COD.
Proceedings of 2011 …, Jan 1, 2011
In this study, the characteristic of COD and colour removal of azo dye by Advanced Oxidation Proc... more In this study, the characteristic of COD and colour removal of azo dye by Advanced Oxidation Process (AOP) and biological treatment was evaluated for applying in azo dye industrial effluent treatment. Reactive Red 120 has been selected amongst azo dyes due to its high solubility in aquatic environment. AOP could be improving colour removal of reactive red 120 in comparison to ozonation, due to acceleration of ozone decomposition by Hydrogen Peroxide and eventually enhanced the production of the hydroxyl radical, which is quickly oxidize colour impacting functional group in reactive red 120. The optimum COD removal by AOP was achieved at 1 mg H 2 O 2 .mg O 3 -1 . Further addition of hydrogen peroxide could be increasing COD, which probably due to residual H 2 O 2 that is not completely react with ozone to produce hydroxyl radical. In the multi-stage ozonation biological treatment, the role of ozonation seems to breakdown the azo dye molecule and created ozonation product that is easily biodegraded in biological treatment. On the other hand, advanced oxidation process tends to decompose ozone and hydrogen peroxide to produce OH radical, and react with azo dye through radical mechanism to completely mineralized azo dye.
National Postgraduate Conference ( …, Jan 1, 2011
In this research, the characteristic of COD and colour removal of azo dye by ozonation and biolog... more In this research, the characteristic of COD and colour removal of azo dye by ozonation and biological treatment was evaluated for applying in azo dye industrial effluent treatment. Reactive Red 120, Remazol Brilliant Blue, Reactive Green 19 and Reactive Black 5 has been selected amongst azo dyes due to its high solubility in aquatic environment. COD removal was contributed simultaneously by ozonation and biological treatment mechanism at lower ozone doses. However, it was significantly contributed by direct oxidation at higher ozone dose. The biodegradable fraction of COD could be further oxidized and completely removed by ozonation. Consequently, ozone will be competitively consumed by residual COD as well as biodegradable COD if higher ozone dose is applied. Therefore, ozonation is effective for reducing the colour of Reactive Red 120, Remazol Brilliant Blue, Reactive Green 19 and Reactive Black 5.
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Papers by Che Zulzikrami Azner Abidin
decolourization was carried out by bubbling ozone at the bottom of a bubble column reactor containing the dye
solution. The colour, chemical oxygen demand, and total organic carbon removal were evaluated, and the contaminants
were characterized based on the changes in UV-Vis and FT-IR spectra. It was observed that changes of UV-Vis spectra
represent the disappearance of both azo and aromatic groups, which causes the colour removal. FT-IR analysis indicated
that ozonation shifts the functional groups in the azo dye which results in decolourization, a decrease in aromaticity,
and an increase in acidity. The results indicate that the chromophore is destroyed and partially mineralized to small
fragments during ozonation. The alkaline pH was favourable to decomposition by ozonation, initiated by the formation
of the hydroxyl radicals. The oxidation followed first-order kinetics and the completed decolourization confirmed the
capability of ozonation to cleave the azo bond from the dye.