The natural radioactivity of phosphate ore and associated waste products discharged into the eastern Irish Sea from a phosphoric acid production plant
The natural radioactivity of phosphate ore and associated waste products discharged into the eastern Irish Sea from a phosphoric acid production plant
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从磷酸生产厂排放到东爱尔兰海的磷矿石和相关废物的天然放射性
DOI：
10.1016/0048-9697(95)04770-0
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
A. Young
中科院分区：
文献类型：
--
作者：
A. J. Poole;D. Allington;A. Baxter;A. Young
1954年至1992年期间，大量液体和固体废物从奥尔布赖特和威尔逊磷酸生产厂排放到爱尔兰海东部。1992年，工厂的运营发生了变化，原材料不再是磷矿石，而是粗磷酸。这些变化导致废物排放量大幅减少。排放是特别感兴趣的，因为它们是一个重要的本地来源的天然系列放射性核素进入爱尔兰海东部。在1992年6月之前的一段时间里，该厂使用的磷矿石混合物含有1377 ± 34 Bq kg− 1238 U，以及较低浓度的235 U和232 Th（分别为56 ± 4和13 ± 2 Bq kg−1）。230 Th和226 Ra的浓度略高于238 U，但处于平衡状态（分别为1508 ± 57和1477 ± 36 Bq kg−1）; 210 Pb和210 Po的浓度低于226 Ra，但彼此处于平衡状态（分别为837 ± 55和835 ± 29 Bq kg−1）。在粗磷酸的初始生产过程中产生了U、Th和Ra之间的不平衡。本文介绍了放射性核素数据收集的污水样品之前，和之后，在1992年期间在工厂的修改。这些数据将用于估计1992年6月前后排入海洋环境的放射性核素的存量。
Large volumes of liquid and solid waste were discharged into the eastern Irish Sea from the Albright & Wilson phosphoric acid production plant between 1954 and 1992. In 1992, operations at the plant changed and crude phosphoric acid rather than phosphate ore became the raw material. These changes resulted in a large reduction in the volume of waste discharged. The discharges are of particular interest since they are a significant local source of natural series radionuclides entering the eastern Irish Sea. The phosphate ore mix used at the plant in the period immediately prior to June 1992 contained 1377 ± 34 Bq kg−1238U, and lower concentrations of235U and232Th (56 ± 4 and 13 ± 2 Bq kg−1, respectively). The concentration of230Th and226Ra were in slight excess of238U but were in equilibrium (1508 ± 57 and 1477 ± 36 Bq kg−1, respectively).210Pb and210Po were present in lower concentration than226Ra but were in equilibrium with each other (837 ± 55 and 835 ± 29 Bq kg−1, respectively). Disequilibrium between U, Th and Ra was created during the initial production of the crude phosphoric acid. This paper presents radionuclide data obtained from effluent samples collected prior to, and following, modifications at the plant during 1992. These data will be used to estimate the inventory of radionuclides discharged to the marine environment before and after June 1992.