Ecosystem uptake and transfer of Sellafield-derived radiocarbon (14C). Part 1. The Irish Sea.

Ecosystem uptake and transfer of Sellafield-derived radiocarbon (14C). Part 1. The Irish Sea.
复制标题

生态系统对塞拉菲尔德衍生的放射性碳 (14C) 的吸收和转移。

DOI:
10.1016/j.marpolbul.2016.10.072
复制
发表时间:
2017
影响因子:
5.8
通讯作者:
Muir GK
Muir GK
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Muir GK

文献摘要

参考文献

被引文献

相似文献

研究了爱尔兰海生态系统对来自Sellafield的放射性碳(14C)的吸收和转移过程。沉积物、海水和生物群中的高度可变的活性表明了复杂的14C扩散和吸收动力学。所有东部盆地生物群都表现出高于环境背景的14C富集,而大多数西部盆地生物群的14C活动接近背景,尽管包括两个缓慢移动的物种在内的4个生物群显著富集。爱尔兰西部海环流是14C向西部盆地转移和滞留的一条可能途径。尽管塞拉菲尔德的14C排放仍在继续,但塞拉菲尔德附近的有机沉积物的丰度明显低于相关的底栖生物。生物对不稳定的富含14C的有机物质的快速清除和到达沉积物/水界面的富含14C的碎屑的深层混合被认为是解释这一现象的机制。所有具有重要商业价值的鱼类、甲壳类和软体动物都显示出高于本底的14C富集量;然而,它们消耗的辐射剂量极低,在辐射上微不足道。
Ecosystem uptake and transfer processes of Sellafield-derived radiocarbon (14C) within the Irish Sea were examined. Highly variable activities in sediment, seawater and biota indicate complex14C dispersal and uptake dynamics. All east basin biota exhibited14C enrichments above ambient background while most west basin biota had14C activities close to background, although four organisms including two slow-moving species were significantly enriched. The western Irish Sea gyre is a suggested pathway for transfer of14C to the west basin and retention therein. Despite ongoing Sellafield14C discharges, organic sediments near Sellafield were significantly less enriched than associated benthic organisms. Rapid scavenging of labile,14C-enriched organic material by organisms and mixing to depth of14C-enriched detritus arriving at the sediment/water interface are proposed mechanisms to explain this. All commercially important fish, crustaceans and molluscs showed14C enrichments above background; however, the radiation dose from their consumption is extremely low and radiologically insignificant.
混合时间尺度和再溶解过程对东北爱尔兰海沉积物中放射性核素分布的影响
DOI: --
发表时间: 1998
期刊:
影响因子: --
作者:
A. B. Mackenzie;G. Cook;P. McDonald;S. R. Jones
通讯作者: S. R. Jones
1978 年至 1996 年爱尔兰海沉积物中钚和镅重新分布的观察结果:浓度和库存
DOI: --
发表时间: 1999
期刊:
影响因子: --
作者:
P. Kershaw;D. Denoon;D. Woodhead
通讯作者: D. Woodhead
爱尔兰海潮间带和盐沼沉积物中的塞拉菲尔德废物放射性核素
DOI: --
发表时间: 1993
影响因子: 4.2
作者:
A. B. Mackenzie;R. Scott
通讯作者: R. Scott
北爱尔兰海的海流系统
DOI: 10.1038/224059a0
发表时间: 1969
期刊: Nature
影响因子: 64.8
作者:
J. Ramster;H. W. Hill
通讯作者: H. W. Hill
公众因摄入放射性核素而受到的年龄相关剂量:第 4 部分吸入剂量系数
DOI: 10.1016/s0146-6453(00)80008-1
发表时间: 1995
期刊: Annals of the ICRP
影响因子: --
作者:
Icrp
通讯作者: Icrp