Migration of Selenium in Soil-Rice-Human System and Health Risk Assessment in Enshi Area
ZHAO Han
CAI Chao
Abstract：In order to provide a scientific basis for the local management and development of the selenium resources,four soil samples and four relevant rice samples were collected in Enshi,the contents of selenium in soils and rice samples were measured by ICP-MS,and the combined forms of selenium were detected by sequencial extraction method,and the bioavailability of selenium of rice was explored by the in vitro gastrointestinal model.The results showed that selenium content of soil was 0.15-5.42 mg/kg in Enshi,the proportion of water soluble selenium was the lowest with 1.41%-3.80%,and the proportion of residual selenium was the highest with 36.1%-41.7%.The selenium contents of rice were 0.07-1.61 mg/kg,the bioconcentration factors of selenium in rice were 0.22-0.48,and the selenium bioaccessibility in rice were 45.7%-56.4% and 58.4%-68.5% in gastric phase and small intestine phase respectively.In addition,the intake of selenium per capita in Yutangba,Changping,Shadi,Taiyanghe were 490,26,132,57 μg/d,indicating that the local residents of Yutangba had potential chronic selenium poisoning risk,and the dietary nutrition belonged to rich level in Shadi and Taiyanghe,and the dietary nutrition belonged to lack level in Changping.
Keywords：seleniumsoilricebioaccessibilityselenosis risk
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 62-66 )