CHEMISTRY AND SPECIATION OF SOIL-WATER FROM SERPENTINITIC SOILS - IMPORTANCE OF COLLOIDS IN THE TRANSPORT OF CR, FE, MG, AND NI

被引：38

作者：

GASSER, UG ^{[1
]}

JUCHLER, SJ ^{[1
]}

STICHER, H ^{[1
]}

机构：

[1] ETH, INST TERR OKOL, CH-8952 SCHLIEREN, SWITZERLAND

来源：

SOIL SCIENCE | 1994年 / 158卷 / 05期

关键词：

D O I：

10.1097/00010694-199411000-00002

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

This study focused on the chemistry of soil water samples (SWS) obtained by tension-free lysimetry from serpentinitic, i.e., Cr- and Ni-rich, Dystric Eutrochrepts. Soil water samples from undisturbed soil profiles had total elemental concentrations (mumol/L) of 0.1-3.2 Cr, 0.2-3.1 Ni, 3-154 Fe, and 55-401 Mg; however, dialysis revealed that on average, only 72% of total Mg, 39% Ni, 28% Cr and 15% Fe were present in dissolved form. Thus, in serpentinitic soils, colloids can be an important means of element translocation. Among metallic cations, Mg contributed generally more than 50% to the positive charge of SWS; also, there was a high linear correlation between dissolved (dialyzable) Mg and electrical conductivity.

引用

页码：314 / 322

页数：9

共 43 条

[1] SOILS AND CONIFER FOREST PRODUCTIVITY ON SERPENTINIZED PERIDOTITE OF THE TRINITY OPHIOLITE, CALIFORNIA [J].