Foliar exchange of mercury as a function of soil and air mercury concentrations

被引:127
作者
Ericksen, JA [1 ]
Gustin, MS [1 ]
机构
[1] Univ Nevada, Dept Environm Resource & Sci, Reno, NV 89557 USA
关键词
foliar exchange; mercury concentrations; bi-directional;
D O I
10.1016/j.scitotenv.2003.10.034
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Previous research has indicated that foliar mercury (Hg) flux is bi-directional, with influence from both atmospheric and soil Hg. This work investigated the role of soil and air Hg concentrations on foliar Hg exchange using a single-plant gas-exchange system. The exchange of Hg vapor with aspen seedlings grown in soil Hg concentrations of 0.03+/-0.01, 5.8+/-0.5, and 12.3+/-1.3 mug g(-1) and exposed to atmospheric Hg concentrations of 2.4+/-0.5, 11.0+/-0.9, and 30.4+/-2.2 ng m(-3) was measured. At background atmospheric Hg concentrations of 2.4 ng m(-3), foliage released Hg at all three soil Hg concentrations and fluxes ranged from 1.6 to 5.5 ng/m(2)/h. At higher atmospheric Hg concentrations (>11 ng m(-3)), net deposition to foliage ranged from -9 to -47 ng/m(2)/h, exhibiting increase uptake with higher air Hg concentrations. Fluxes associated with aspen showed an immediate response to changes in atmospheric Hg concentrations. Compensation points, the air concentration where no net flux of Hg vapor occurred, were 3-4 ng m(-3) in the light and 2-3 ng m(-3) in the dark for trees grown in soils of 0.03 and 6 mug g(-1) Hg content, and 5-6 ng m(-3) in the light and 2.5-3.5 ng m(-3) in the dark for trees grown in 12 mug g(-1) Hg soils. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:271 / 279
页数:9
相关论文
共 36 条
[1]   UPTAKE AND DISTRIBUTION OF MERCURY WITHIN HIGHER-PLANTS [J].
BEAUFORD, W ;
BARBER, J ;
BARRINGER, AR .
PHYSIOLOGIA PLANTARUM, 1977, 39 (04) :261-265
[2]   Xylem sap as a pathway for total mercury and methylmercury transport from soils to tree canopy in the boreal forest [J].
Bishop, KH ;
Lee, YH ;
Munthe, J ;
Dambrine, E .
BIOGEOCHEMISTRY, 1998, 40 (2-3) :101-113
[3]   DETERMINATION OF VOLATILE MERCURY SPECIES AT THE PICOGRAM LEVEL BY LOW-TEMPERATURE GAS-CHROMATOGRAPHY WITH COLD-VAPOR ATOMIC FLUORESCENCE DETECTION [J].
BLOOM, N ;
FITZGERALD, WF .
ANALYTICA CHIMICA ACTA, 1988, 208 (1-2) :151-161
[4]   UPTAKE OF MERCURY-VAPOR BY WHEAT - ASSIMILATION MODEL [J].
BROWNE, CL ;
FANG, SC .
PLANT PHYSIOLOGY, 1978, 61 (03) :430-433
[5]   EFFECTS OF ROOT MORPHOLOGY AND HG CONCENTRATION IN THE SOIL ON UPTAKE BY TERRESTRIAL VASCULAR PLANTS [J].
COCKING, D ;
ROHRER, M ;
THOMAS, R ;
WALKER, J ;
WARD, D .
WATER AIR AND SOIL POLLUTION, 1995, 80 (1-4) :1113-1116
[6]   COMPARISON OF THE COLLECTION AND DESORPTION EFFICIENCY OF ACTIVATED-CHARCOAL, SILVER, AND GOLD FOR THE DETERMINATION OF VAPOR-PHASE ATMOSPHERIC MERCURY [J].
DUMAREY, R ;
DAMS, R ;
HOSTE, J .
ANALYTICAL CHEMISTRY, 1985, 57 (13) :2638-2643
[7]   Accumulation of atmospheric mercury in forest foliage [J].
Ericksen, JA ;
Gustin, MS ;
Schorran, DE ;
Johnson, DW ;
Lindberg, SE ;
Coleman, JS .
ATMOSPHERIC ENVIRONMENT, 2003, 37 (12) :1613-1622
[8]  
FRESCHOLTZ TF, 2003, IN PRESS ENV TOXICOL, V22
[9]   Mercury in the soil-plant-deer-predator food chain of a temperate forest in Slovenia [J].
Gnamus, A ;
Byrne, AR ;
Horvat, M .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (16) :3337-3345
[10]   INHIBITION OF PHOTOSYNTHESIS AND TRANSPIRATION IN RELATION TO MERCURY-INDUCED ROOT DAMAGE IN SPRUCE SEEDLINGS [J].
GODBOLD, DL ;
HUTTERMANN, A .
PHYSIOLOGIA PLANTARUM, 1988, 74 (02) :270-275