Degradative hydrogen peroxide oxidation of chelates catalysed by metallophthalocyanines

被引：28

作者：

Pirkanniemi, K

Sillanpää, M

Sorokin, A

机构：

[1] Aalto Univ, Lab Environm Protect Technol, FIN-02015 Helsinki, Finland

[2] Oulu Univ, Lab Water Resources & Environm Engn, FIN-90014 Oulu, Finland

[3] Inst Rech Catalyse, CNRS, F-69626 Villeurbanne, France

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2003年 / 307卷 / 1-3期

基金：

芬兰科学院;

关键词：

chelating agent; degradation; phthalocyanine; hydrogen peroxide; catalysis;

D O I：

10.1016/S0048-9697(02)00499-0

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Catalytic oxidation of various chelating agents in aqueous solutions, namely: diethylenetriaminepentakis (methylphosphonic acid) (DTPMP); diethylenediaminepentaacetic acid (DTPA); ethylenediamine tetraacetic acid (EDTA); nitrilotriacetic acid (NTA); and beta-alaninediacetic acid (beta-ADA) was studied. Hydrogen peroxide was used as oxidising agent in combination with five different metallotetrasulfophthalocyanines as catalysts. (Reaction temperature was set to 60 degreesC, which is expected to be the temperature of bleaching wastewaters of modem pulp mill in the near future. Among the uncomplexed chelating agents, EDTA was most readily degraded, while DTPMP and NTA were less degradable. beta-ADA and DTPA concentrations remained high. The metal speciation of these chelating agents has a significant effect on their chemical degradability. Iron, manganese and sodium complexes were most degradable, while zinc, copper and calcium complexes were more difficult to oxidise. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：11 / 18

页数：8

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