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篇目详细内容 |
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【篇名】 |
The kinetics study of the reduction of Fast Green dye with cetylpyridinum chloride as cationic surfactant |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s11458-011-0233-x |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2011 |
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【卷期】 |
6
卷2期 |
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【页码】 |
105-112
页,共
8
页 |
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【作者】 |
Muhammad SULTAN;
Hajira TAHIR;
Khalid AHMED;
Qazi JAHANZEB;
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【关键词】 |
Fast Green; cetylpyridinum chloride; OH？ ions; decoloration; cationic surfactant |
【摘要】 |
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The kinetics of the reaction of Fast Green dye (FG) with cetylpyridinum chloride was studied in alkaline medium by UV-Visible spectrophotometer. Reduction of Fast Green dye was carried out by varying the fast green dye concentration, cetylpyridinum chloride concentration and concentration of sodium hydroxide. In the present study the reduction of dye was carried out in order to reduce the color content. The interaction of dye was carried out with reducing analyte (cetylpyridinum chloride). The rate of the reaction was determined by varying the above parameters at different temperatures. It was observed that the reduction followed pseudo first-order kinetics with respect to dye, surfactant, OH？ ion concentration according to the following reaction pathway. The mechanism for the photo bleaching of the dye has been？proposed and well confirmed by the data simulation procedure. The activation parameters of the reaction like entropy of activation (ΔS) and free energy of activation (ΔG) showed the extremely solvated states of transient complex which was less disorderly arranged than the oxidized form of dye, whereas Ea values reflects a high amount of energy required for the reduction of dye with cetylpyridinum chloride. |
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