14C Sources and Distribution in the Vicinity of La Hague Nuclear Reprocessing Plant: Part Ii—Marine Environment

Carbon dioxide partial pressure and radiocarbon activity were measured in air and seawater in the Bay of Seine and around the COGEMA-La Hague nuclear reprocessing plant (northwest France) during 3 cruises in 2000 and 2002. Results clearly show that the sea is a source of CO2 and 14C to the atmosphere. High 14C concentrations in air and water related to the La Hague liquid waste are clearly recorded. For the restricted area of the Bay of Seine, CO2 carbon and 14C fluxes were estimated, indicating that less than 3% of the liquid 14C release is introduced in the atmosphere.

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14C Sources and Distribution in the Vicinity of La Hague Nuclear Reprocessing Plant: Part I—Terrestrial Environment

Radiocarbon ◽

10.1017/s0033822200035852 ◽

2004 ◽

Vol 46 (2) ◽

pp. 827-830 ◽

Cited By ~ 19

Author(s):

M Fontugne ◽

D Maro ◽

Y Baron ◽

C Hatté ◽

D Hebert ◽

...

Keyword(s):

Liquid Waste ◽

Plant Part ◽

Nuclear Plant ◽

Terrestrial Environment ◽

Air Samples ◽

Nuclear Reprocessing ◽

C Distribution ◽

Reprocessing Plant

COGEMA-La Hague nuclear reprocessing plant in the Cotentin Peninsula (northwest France) releases in the atmosphere about 19 TBq.yr-1 of radiocarbon. Three experiments in a terrestrial environment with sampling of a bio-indicator like furze were performed in 1997, 1998, and 1999, and additional air samples in the chimney plume were measured. Results presented here establish the 14C distribution in the La Hague environment and suggest that a part of the 14C content in the vegetation near the coast results from a 14CO2 degassing of seawater supplied with the liquid waste from the nuclear plant.

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Variations with Time of the Carbon Dioxide Partial Pressure in Central and South Atlantic Surface Waters

10.21236/ada145825 ◽

1984 ◽

Author(s):

Jr Lipphardt ◽

Keyword(s):

Carbon Dioxide ◽

Partial Pressure ◽

Surface Waters ◽

South Atlantic ◽

Carbon Dioxide Partial Pressure

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Dissolved organic carbon content and characteristics in relation to carbon dioxide partial pressure across Poyang Lake wetlands and adjacent aquatic systems in the Changjiang basin

Environmental Pollution ◽

10.1016/j.envpol.2016.07.012 ◽

2016 ◽

Vol 219 ◽

pp. 714-723 ◽

Cited By ~ 2

Author(s):

Huaxin Wang ◽

Ruyuan Jiao ◽

Fang Wang ◽

Lu Zhang ◽

Weijin Yan

Keyword(s):

Carbon Dioxide ◽

Organic Carbon ◽

Dissolved Organic Carbon ◽

Partial Pressure ◽

Carbon Content ◽

Poyang Lake ◽

Aquatic Systems ◽

Carbon Dioxide Partial Pressure ◽

Organic Carbon Content ◽

Lake Wetlands

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Temperature-carbon dioxide partial pressure trends in confined aquifers

Chemical Geology ◽

10.1016/s0009-2541(97)00161-7 ◽

1998 ◽

Vol 145 (1-2) ◽

pp. 73-89 ◽

Cited By ~ 47

Author(s):

Anne Coudrain-Ribstein ◽

Philippe Gouze ◽

Ghislain de Marsily

Keyword(s):

Carbon Dioxide ◽

Partial Pressure ◽

Carbon Dioxide Partial Pressure ◽

Confined Aquifers

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The behaviour of plants in various gas mixtures

Proceedings of the Royal Society of London Series B Biological Sciences ◽

10.1098/rspb.1971.0089 ◽

1971 ◽

Vol 179 (1056) ◽

pp. 177-188

Keyword(s):

Carbon Dioxide ◽

Gas Exchange ◽

Partial Pressure ◽

Higher Plants ◽

Dry Mass ◽

Carbon Dioxide Partial Pressure ◽

Ambient Oxygen ◽

Leaf Dry Mass ◽

Rate Of Photosynthesis ◽

Effect Of Oxygen

The effects of the composition and pressure of the ambient gas mixture on the diffusive gas exchange of leaves, and the effects of carbon dioxide and oxygen on respiration and photosynthesis are described. When photosynthesis is limited by the rate at which carbon dioxide reaches the chloroplasts, the net rate of photosynthesis of many (but not all) plant species depends on the ambient oxygen partial pressure. The effect of oxygen may be principally to stimulate a respiratory process rather than to inhibit carboxylation. However, when photosynthesis is not limited by the carbon dioxide supply, this respiratory process seems to be suppressed. The gas exchange of plant communities responds to the aerial environment in the way expected from measurements on single leaves, but the growth response to a given difference in gas composition is smaller than expected because of adaptation, notably in the ratio of leaf dry mass to leaf area. It is concluded that the growth rate of higher plants in given illumination will be independent of the partial pressure of oxygen and of other gases likely to be used to dilute it, provided that the carbon dioxide partial pressure is so adjusted (probably to not more than 2 mbar (200 Pa)) that the rate of photosynthesis is not limited by the rate of diffusion to the chloroplasts.

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