Synchrotron studies of selenium environmental chemistry

硒环境化学的同步加速器研究

• 批准号: RGPIN-2016-05810
• 负责人: Pickering, Ingrid
• 金额: $ 4.44万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632912
• 关键词: Synchrotron; studies; selenium; environmental; chemistry

As a micronutrient element required for all kingdoms of life, selenium (Se) is one of the least abundant micronutrients in the earth’s crust. World Se distribution is highly variable; while Canada’s prairie soils are among the richest yielding higher Se crops, globally soils are more likely to provide inadequate Se. Moreover, Se has a smaller difference between sufficient and excess dietary amounts than perhaps any other element. There is growing concern over slightly elevated Se in aqueous environments in several areas of Canada due to mining or other anthropogenic activities, since bioaccumulation of Se can cause problems for top predators. This delicate balance between insufficient and excess is just one challenge of Se.

作为所有生命王国所需的微量营养元素，硒（Se）是地壳中含量最少的微量营养元素之一。世界硒的分布是高度可变的，而加拿大的草原土壤是最富有的高产硒作物，全球土壤更有可能提供不足的硒。此外，硒在充足和过量膳食量之间的差异可能比任何其他元素都小。由于采矿或其他人为活动，加拿大几个地区的水环境中硒含量略有升高，这一点越来越引起人们的关注，因为硒的生物积累会给顶级捕食者带来问题。这种不足和过剩之间的微妙平衡只是硒的一个挑战。