The Kinetics of the Decomposition of Potassium Persulfate in Aqueous Solutions of Methanol

A Kinetic Study of the Oxidation of Nitrite Ion by Peroxodisulphate.

“…Therefore it is safe to conclude that the rate of the reaction is independent of pH. 4 . radicals seem to end up forming oxygen according to well established mechanism discussed by House (10) , while most SO 4 .…”

“…4 . radicals seem to end up forming oxygen according to well established mechanism discussed by House (10) , while most SO 4 . radicals seem to oxidize NO 2 -ion in some faster steps represented by the overall equ.…”

“…Peroxodisulphuric acid and its salts were suggested to be among the most useful oxidizing agents in aqueous solution (2,3) . Many studies on the thermal decomposition of Peroxodisulphate ions were made by many workers such as Cotton, Kolthoff, Miller, Vasudeva, Taha and Wasif (4) and there is general agreement that it follows first order kinetics. Reactions involving peroxodisulphate ion are generally slow at ordinary temperatures (5) but become more rapid in the presence of some metal ions like Ag(I), Fe(II) and Cu(II).…”

A kinetic study of the mechanism of oxidation of arabinose, fructose and lactose by peroxydisulphate

“…The sulphate free radical disappear either by reaction with water to produce oxygen or by reaction with arabinose molecule to give free radical which attack peroxydisulphate and this explain the increase in the rate of decomposition of peroxydisulphate by the addition of arabinose. Path (I) can be represented by the following scheme [9]:…”

Kinetics and Mechanism of the Persulphate Oxidation of 2-Propanol and 2-Butanol

“…Further evidence against a radical-chain mechanism for the persulphate oxidation of organic compounds is the relatively high activation energy (1 1, 12) of approximately 26 kcal/mole for these reactions, and the fact that molecular oxygen has no effect on the rate of the persulphate oxidation of sulphides ( l l ) , sulphoxides (11), or toluene (13); even in the Agf-catalyzed persulphate cleavage of glycols strong evidence has been presented by Greenspan and Woodburn (14) for the absence of free-radical intermediates. ' The original proposal of a free-radical chain mechanism for persulphate oxidation of alcohols was made by Bartlett (15,16). The first step in the oxidation of thiols was considered by Eager and Winkler (17) to be the reversible dissociation of persulphate into sulphate ion radicals:…”