Copper speciation and binding by organic matter in copper-contaminated streamwater

被引：113

作者：

Breault, RF

Colman, JA

Aiken, GR

McKnight, D

机构：

[1] US GEOL SURVEY,MARLBOROUGH,MA 01752

[2] US GEOL SURVEY,BOULDER,CO 80303

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1996年 / 30卷 / 12期

关键词：

D O I：

10.1021/es9601301

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Fulvic acid binding sites (1.3-70 mu M) and EDTA (0.0017-0.18 mu M) accounted for organically bound Cu in seven stream samples measured by potentiometric titration. Cu was 84-99% organically bound in filtrates with 200 nM total Cu. Binding of Cu by EDTA was limited by competition from other trace metals. Water hardness was inversely related to properties of dissolved organic carbon (DOG) that enhance fulvic acid binding: DOC concentration, percentage of DOC that is fulvic acid, and binding sites per fulvic acid carbon. Dissolved trace metals, stabilized by organic binding, occurred at increased concentration in soft water as compared to hard water.

引用

页码：3477 / 3486

页数：10

共 46 条

[1] ISOLATION OF HYDROPHILIC ORGANIC-ACIDS FROM WATER USING NONIONIC MACROPOROUS RESINS [J].