| Title: | Role of some organic inhibitors on the oxidation of dissolved sulfur dioxide by oxygen in rainwater medium |
| Author(s): | Dhayal Y; Chandel CP; Gupta KS; |
| Address: | "Atmospheric Chemistry Lab, Department of Chemistry, University of Rajasthan, Jaipur, 302004, India" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-013-2253-1 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "In August 2012, eight rainwater samples were collected and analyzed for pH and metal ions, viz., iron, copper, and manganese. The pH was within the range 6.84-7.65. The rate of oxidation of dissolved sulfur dioxide was determined using these rainwater samples as reaction medium. Kinetics was defined by the rate law: -d[S(IV)]/dt = R o = k o[S(IV)]], where k o is the first-order rate constant and R o is the rate of the reaction. The effect of two volatile organic compounds-ethanol and 2-butanol-was examined and found to inhibit the oxidation as defined by the rate law: k obs = k o/(1 + B [Inh]), where k obs is the first-order rate constant in the presence of the inhibitor, [Inh] is the concentration of the inhibitor, and B is the inhibitor parameter-an empirical constant. In the pH range of collected rainwater samples, the values of first-order rate constants ranged from 3.1 x 10(-5) to 1.5 x 10(-4) s(-1) at 25 degrees C. The values of inhibition parameter were found to be (5.99 +/- 3.91 x 10(4)) (ethanol) and (3.95 +/- 2.36) x 10(4) (2-butanol) at 25 degrees C" |
| Keywords: | "Butanols/chemistry Ethanol/chemistry Hydrogen-Ion Concentration Kinetics Metals, Heavy/analysis/chemistry Oxidation-Reduction Oxygen Rain/*chemistry Sulfur Dioxide/*chemistry;" |
| Notes: | "MedlineDhayal, Yogpal Chandel, C P S Gupta, K S eng Research Support, Non-U.S. Gov't Germany 2013/11/19 Environ Sci Pollut Res Int. 2014 Mar; 21(5):3474-83. doi: 10.1007/s11356-013-2253-1. Epub 2013 Nov 19" |
