胶体在人工放射性核素从罗纳河向利翁湾（地中海）溶解相（<450纳米）内迁移中的重要性。

Importance of colloids in the transport within the dissolved phase (<450 nm) of artificial radionuclides from the Rhône river towards the Gulf of Lions (Mediterranean Sea).

作者信息

Eyrolle Frédérique, Charmasson Sabine

机构信息

Laboratoire d'Etudes Radioécologiques Continentales et de la Mediterranée, Institut de Radioprotection et de Sûreté Nucléaire, DPRE/SERNAT, BP 3, 13115 Saint Paul lez Durance cedex, France.

出版信息

J Environ Radioact. 2004;72(3):273-86. doi: 10.1016/S0265-931X(03)00178-4.

DOI:10.1016/S0265-931X(03)00178-4

PMID:14972410

Abstract

The significance of colloidal fractions regarding the transport of artificial radionuclides in natural water systems is underlined by using sequential ultrafiltration both in the Rhône freshwater and the marine area under and outside the influence of the river outflow. Indeed, the Rhodanian aquatic system represents an interesting test site as various artificial radionuclides are released into the Rhône river by several nuclear installations. We focused our study on (137)Cs, (106)Ru, (60)Co, (238)Pu and (239+240)Pu. Our results show that Fe, Al and Organic carbon (OC) are the main components of colloidal matter. Colloids represent about 15% of dissolved (<450 nm) OC and 25% of dissolved Fe and Al exported towards the sea. Within the dissolved (< 450 nm) phase, these colloidal compounds are shown to account for the transport of 40% for both Co and Ru, 60% for (238)Pu and (239+240)Pu and have no significance on (137)Cs flux.

摘要

通过在罗纳河淡水区域以及受河流流出影响和未受影响的海洋区域进行连续超滤，突显了胶体部分在天然水系统中人工放射性核素迁移方面的重要性。实际上，罗讷河水系是一个有趣的试验场，因为多个核设施将各种人工放射性核素排放到罗纳河中。我们的研究重点是（137）铯、（106）钌、（60）钴、（238）钚和（239 + 240）钚。我们的结果表明，铁、铝和有机碳（OC）是胶体物质的主要成分。胶体约占向海洋输出的溶解态（<450纳米）有机碳的15%，以及溶解态铁和铝的25%。在溶解态（<450纳米）相中，这些胶体化合物在钴和钌的迁移中占40%，在（238）钚和（239 + 240）钚的迁移中占60%，而对（137）铯通量无显著影响。