Kinetics of the sulfate radical-mediated photor-oxidation of humic substances

被引：46

作者：

Gara, Pedro M. David ^{[1
]}

Bosio, Gabriela N. ^{[1
]}

Gonzalez, Monica C. ^{[1
]}

Martire, Daniel O. ^{[1
]}

机构：

[1] Natl Univ La Plata, Fac Ciencias Exactas, Inst Invest Fisicoquim Teor & Aplicadas, RA-1900 La Plata, Argentina

来源：

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS | 2008年 / 40卷 / 01期

关键词：

D O I：

10.1002/kin.20287

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The kinetics of the aqueous phase reaction of sulfate radicals with commercial humic acids and with organic matter extracted from vermicompost (VC) was studied by flash-photolysis. The results can be interpreted by a mechanism that in a first step considers the reversible binding of the sulfate radicals by the humic substances. Both the bound and free sulfate radicals decay to oxidized products, From experiments performed with Aldrich humic acids in the temperature range from 283 to 303 K, the enthalpy change associated with the binding process was estimated to be -(36 +/- 11) kJ mol(-1). (C) 2007 Wiley Periodicals, Inc.

引用

页码：19 / 24

页数：6

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