Soil and foliar mercury emission as a function of soil concentration

被引：38

作者：

Frescholtz, TF ^{[1
]}

Gustin, MS ^{[1
]}

机构：

[1] Univ Nevada, Dept Environm & Resource Sci, Reno, NV 89557 USA

来源：

WATER AIR AND SOIL POLLUTION | 2004年 / 155卷 / 1-4期

关键词：

gas exchange; mercury; ponderosa pine; quaking aspen;

D O I：

10.1023/B:WATE.0000026530.85954.3f

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The goal of this study was to investigate net mercury flux associated with seedlings of two species (Populus tremuloides and Pinus ponderosa) grown in three soil exposure concentrations (0.010 +/- 0.001, 6.15 +/- 0.86, and 25.56 +/- 2.10 mug Hg g(-1)) and to determine if mercury flux from vegetation was directly correlated with mercury concentration in the soil. Net mercury flux was measured using a gas exchange system. Mercury emission from foliage was not influenced by mercury concentration in the soil. Experiments were also done to assess the significance of mercury emission from vegetation relative to that occurring from associated soils. Mean soil mercury emissions were 1 to 3 orders of magnitude higher than that from plants grown in similar soil mercury concentrations. Light and the addition of water were found to significantly increase mercury emission from soils, and the magnitude of the flux response to watering was correlated with soil mercury concentration.

引用

页码：223 / 237

页数：15

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