表层城市大气中钋-210 活度过剩。第 2 部分：²¹⁰Po 过剩的起源。
Excess of polonium-210 activity in the surface urban atmosphere. Part 2: origin of ²¹⁰Po excess.
机构信息
Technical University of Lodz, Institute of Applied Radiation Chemistry, Wróblewskiego 15, 90-924 Łódź, Poland.
出版信息
Environ Sci Process Impacts. 2015 Feb;17(2):465-70. doi: 10.1039/c4em00390j.
The presence of significant (210)Po activity, unsupported by its grandparent radionuclide (210)Pb, in the surface atmosphere of industrialized regions can originate from human technical activities. In urban air, the activity ratio of (210)Po to (210)Pb might increase as a result of natural condensation and coagulation processes of relatively volatile (210)Po-containing species emitted during coal combustion processes. The presence of excess of (210)Po cannot be explained by its in-growth from radioactive decay of (210)Bi. About 50% of (210)Po radionuclide released during coal combustion processes can be emitted into air as gaseous or ultrafine products. Subsequently, these products are quickly attached to the surface of fine particles suspended in the air. As a result, an excess of (210)Po activity in aerosols has been reported. However, in this manner, As much as 11 GBq of (210)Po per year can enter the urban air from the local coal power plants in Lodz city, Poland.
在工业化地区的地表大气中，如果存在大量（210）Po 活性，但其母体放射性核素（210）Pb 却不存在，则这种情况可能源自人类的技术活动。在城市空气中，由于自然凝结和凝并过程，相对易挥发的（210）Po 含量物质在煤炭燃烧过程中被排放到大气中，（210）Po 与（210）Pb 的活度比可能会增加。（210）Po 的过剩不能用其放射性衰变产物（210）Bi 的生长来解释。在煤炭燃烧过程中释放的约 50%的（210）Po 放射性核素可以以气态或超细产物的形式排放到空气中。随后，这些产物迅速附着在空气中悬浮的细颗粒物的表面。因此，气溶胶中（210）Po 的过剩活性已经被报道。然而，通过这种方式，每年有多达 11GBq 的（210）Po 可以从波兰罗兹市的当地燃煤电厂进入城市空气。
Zotero 插件