壳聚糖富集水中的硒并用作土壤改良剂

硒循环过程中使水体受到硒污染。将壳聚糖作为水体富硒介质。适宜的酸性条件下，Se（Ⅵ）可以很好地与壳聚糖表面的-NH3^＋／结合，饱和吸附容量达到18．839mg／g。所得壳聚糖硒则用于贫硒区土壤的改良，能够促进作物的生长，食用富硒作物有益于人体健康。可实现水质净化与资源的综合利用。

Enrichment of Selenium From Water by Chitosan and Its Application as Soil Improver

Water bodies are often contaminated by selenium in the process of selenium cycle. In this paper, chitosan was used as a medium to concentrate selenium in water. Under appropriate acidic conditions, Se （VI） and -NH3＋ of chitosan had a good combination. Adsorption capacity reached to 18.839 mg/g. The gained chitosanselenium may be used for improvement of selenium-poor soils,which can promote the growth of crops; and seleniumrich crops are beneficial to human health. At the same time,water purification and resources utilization can be achieved.