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http://nopr.niscpr.res.in/handle/123456789/17971| Title: | Oxidation of nonionic surfactant (Tween-80) by chromium(VI) in acidic medium |
| Authors: | Andrabi, Syed Misbah Zahoor Khan, Zaheer Kabir-ud-Din |
| Issue Date: | Apr-2006 |
| Publisher: | NISCAIR-CSIR, India |
| IPC Code: | Int. Cl.8 C07B33/00 |
| Abstract: | The oxidation of Tween-80 by chromium(VI) in aqueous acidic solutions has been studied at different temperatures (30-60°C). The rates of disappearance of chromium (VI ) absorbance follow second order kinetics; first order each in [Cr(VI )] and [Tw-80] at constant acidity. The reaction order with respect to [H+] increases from one to higher with increase in [HClO4]. Interestingly, Tw-80 is not oxidised in absence of acid. The reaction is considered to proceed through the formation of a chromate ester between the chromium (VI) and primary - OH group of polyoxyethylene chain of Tw-80. The activation parameters calculated using Arrhenius and Eyring equations are: Ea= 46 kJ mol-1 , ΔH# = 44 kJ mol-1 and ΔS#= -200 JK-1 mol-1. . . |
| Page(s): | 882-886 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.45A(04) [April 2006] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 45A(4) 882-886.pdf | 1.02 MB | Adobe PDF | View/Open |
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