Kabata-Pendias A
Institute of Soil Science and Plant Cultivation, Pulawy, Poland.
J Environ Pathol Toxicol Oncol. 1998;17(3-4):173-7.
Selenium (Se) is one of the most peculiar chemical elements in the geo- and biospheres. It partly resembles sulfur and tellurium; however, its behavior in the geosphere and its functions in the biosphere are very specific. Despite a relatively large database, its cycling in both the natural environment and in that modified by human activities requires further study. Selenium is rather concentrated in the geospheric cycle and is also bioconcentrated. The values of its accumulation ratios are: 5 for soil/sandstone, 2 for animal tissues/sandstone, and 5 for animal tissues/grain. For a specific plant/soil system, the bioconcentration factor for plants always has to be estimated because some plants can absorb extremely high concentrations of Se. Their ability to accumulate and tolerate high Se levels is related to different Se metabolisms. These plants play a significant role in geochemical prospecting and animal nutrition. This paper presents some geochemical observations toward a better understanding of the environmental properties of Se.
硒（Se）是地球和生物圈中最特殊的化学元素之一。它部分类似于硫和碲；然而，它在地球圈层中的行为及其在生物圈中的功能非常独特。尽管有相对庞大的数据库，但它在自然环境以及人类活动改变后的环境中的循环仍需进一步研究。硒在地球圈层循环中较为富集，同时也会生物富集。其积累率数值为：土壤/砂岩为5，动物组织/砂岩为2，动物组织/谷物为5。对于特定的植物/土壤系统，植物的生物富集系数总是需要估算，因为一些植物能够吸收极高浓度的硒。它们积累和耐受高硒水平的能力与不同的硒代谢有关。这些植物在地球化学勘探和动物营养中发挥着重要作用。本文提出了一些地球化学观测结果，以便更好地理解硒的环境特性。
