✦ LIBER ✦

Role of resin-manganese(II) complexes in hydrogen peroxide decomposition

✍ Scribed by Ibrahim A. Salem

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 334 KB
Volume: 26
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550260304

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✦ Synopsis

The kinetics of hydrogen peroxide decomposition has been investigated in the presence of Wofatit KPS (4% DVB, 40-80 pm) resin in the form of mono (meal, di (dea), triethanolamine (tea), ethylenediamine (eda), and N,"-diethylethylenediamine (deeds)-Mn(I1) complexes. The rate constant k (per g dry resin)

was evaluated over the temperature range 25-40°C. The reaction was first-order with respect to [HzOzl.

The rate constant, k, with the three ethanolamines decreased in the following order mea > dea > tea which is the same order of basicity. Also, k value with deeda is lower than eda as a result of steric hindrance. The peroxo metal complex which formed at the beginning of the reaction, was found to contain the catalytic active species. The rate of reaction was proportional to [Mn-complexl, [HzOzl and [H+]-l. The activation parameters were calculated and a probable reaction mechanism is proposed.

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