Oceanography Institute, Marine Geology Laboratory, Federal University of Rio Grande, Av. Italia km-08, Campus Carreiros, Rio Grande, RS, 96201-900, Brazil.
Nishny Novgorod State Technical University, Minin St., 24, Nizhny Novgorod, Russian Federation, 603950.
Environ Geochem Health. 2018 Feb;40(1):543-556. doi: 10.1007/s10653-017-9951-4. Epub 2017 Apr 11.
Se deficiency has a critical effect on human health. The littoral near Patos Lagoon in the south of Brazil is composed of Quaternary sandy deposits and nutrient-deficient soils, which contribute to Se deficiency in the surrounding environment. The average concentration of Se in littoral soils is six times lower than the metalloid deficiency threshold of 0.5 mg kg and is close to that in countries where Keshan disease is registered. The sediments in the Patos Estuary are also notably lower in Se than near-shore marine sediments. Foodstuffs produced in the littoral pampas are characterised by extremely low Se concentrations compared with the same alimentary products reported worldwide. The total daily dietary intake of Se in the region is 24 μg day, which is half the Estimated Average Requirement for adults. Black beans in the local diet provide over 40% of daily Se intake. Prescriptive addition of Se to prevalent products seems the most effective solution to the problem of metalloid dietary deficiency in the region. Similar environmental conditions and significant concentration of the population in the littoral zone suggest that the problem of Se deficiency probably affects a large proportion of the population along the Atlantic coast of Brazil.
硒缺乏对人类健康有重大影响。巴西南部帕托斯泻湖附近的滨海地区由第四纪砂质沉积物和营养缺乏的土壤组成，这导致了周围环境中的硒缺乏。滨海土壤中硒的平均浓度比 0.5mg/kg 的类金属缺乏阈值低 6 倍，接近于克山病登记的国家的水平。帕托斯河口的沉积物中的硒含量也明显低于近岸海洋沉积物。与世界范围内报道的相同食物相比，滨海潘帕斯草原生产的食物中的硒含量极低。该地区的每日总硒摄入量为 24μg，是成年人估计平均需求量的一半。当地饮食中的黑豆提供了超过 40%的每日硒摄入量。向流行产品中添加硒似乎是解决该地区类金属饮食缺乏问题的最有效方法。类似的环境条件和大量人口集中在滨海地区，表明巴西大西洋沿岸的大部分人口可能都受到硒缺乏问题的影响。
