FRACTIONATION OF FULVIC-ACIDS - CHARACTERISTICS AND COMPLEXATION WITH COPPER

被引：30

作者：

LIN, CF ^{[1
]}

LEE, DY ^{[1
]}

CHEN, WT ^{[1
]}

LO, KS ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT AGR CHEM,TAIPEI,TAIWAN

来源：

ENVIRONMENTAL POLLUTION | 1995年 / 87卷 / 02期

关键词：

D O I：

10.1016/0269-7491(94)P2605-9

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Two fulvic acid samples isolated from Suwannee river (International Humic Substance Society) and Feeitsuey reservoir were subjected to gelfiltration chromatography (GFC) for molecular size fractionation. The GFC-eluted samples were separated into three groups corresponding to the molecular weight ranges: < 220, 220-1000, and 1000-4000. Fluorescence quenching techniques were employed for determining the conditional stability coefficient and kinetic parameters of copper complexation with the three fractions of fulvic acids. Experimental conditions were pH 6, 5 x 10(-5) M total copper and 5 mg C litre(-1) of fulvic acids. The conditional stability coefficients of the fulvic acid fractions were in the order of 0.9-3.3 X 10(5) M(-1), and the forward and reverse rate constants were in the order of 6.9-12.4 X 10(3) M(-1) s(-1) and 3.5-8.0 X 10(-2) s(-1). Information could be useful in modelling copper transport in the hydrosphere.

引用

页码：181 / 187

页数：7

共 31 条

[1]

ALLEN HE, 1980, ENVIRON SCI TECHNOL, V4, P441

[2] ON SIGNIFICANCE OF METAL COMPLEXING AGENTS IN SECONDARY SEWAGE EFFLUENTS [J].