湖泊科学2016，Vol.28Issue(5)：1103-1114,12.DOI:10.18307/2016.0521
青海湖西岸镭同位素的解吸和扩散特征
Desorption and diffusion characteristics of radium isotopes from particles in the western part of Lake Qinghai
摘要
Abstract
Two laboratory experiments for Radium desorption and diffusion were conducted in this work, which included 1) the Ra-dium desorption of sediments that were under different salinities (2.8‰, 5.8‰, 8.8‰, 11.8‰and 14.8‰) from the lake water and the potential of hydrogen from Buha River estuary. 2) Radium diffusive fluxes with time in the overlying water of lake sedi-ments and in river sediments. We have got the desorbed activity of Radium from the suspended particles and Radium diffusion flu-xes from surface sediments. The results show that the desorption activities of 224 Ra are higher than those of 226 Ra and 228 Ra, and the desorption degrees of 224 Ra, 226 Ra and 228 Ra have reached the maximum value when the salinity near 12‰. The desorption of 226 Ra activities are greater than that of 228 Ra when salinity<9‰, however, when salinity>9‰, the desorption activities of 226 Ra is less than that of 228 Ra, which may be associated with the local rich uranium. The diffusion fluxes of 226 Ra and 228 Ra of sediments from Buha River are 0.039 and 0.290 dpm/(m2.h), respectively, and they are 0.018 and 0.092 dpm/(m2.h) from Lake Qinghai, respectively. The Radium diffusion fluxes of sediments in Lake Qinghai are less than that of the river.关键词
镭同位素/解吸/扩散/布哈河口/青海湖Key words
Radium isotopes/desorption/diffusion/Buha River estuary/Lake Qinghai引用本文复制引用
孔凡翠,马海英,沙占江,杜金洲,苏维刚,胡菊芳,王求贵,马玉军,翟玉乐,王转..青海湖西岸镭同位素的解吸和扩散特征[J].湖泊科学,2016,28(5):1103-1114,12.基金项目
中国科学院百人计划项目“高原内陆盐湖水环境生物地球化学过程”、中国科学院青海盐湖研究所青年引导基金B类项目和青海省科技厅自然基金项目“大柴旦周围水体中锂的地球化学分布规律及对盐湖补给通量研究”（2016-ZJ-921Q）联合资助 （）
