ABSTRACT
Selenium (Se) is an essential trace element for human beings and animals. Diet is the main way for selenium supplementation. Adsorption material has a strong adsorption capacity for some elemental forms under certain physical and chemical conditions. The adsorbed elements can be fixed on the surface of the materials and then slowly released under natural conditions. Adsorption simulation experiments with Se(IV) were then conducted to investigate their maximum adsorption capacity and adsorption/release rules. The solution Se concentration was measured by Hydride Generation-Atomic Fluorescence Spectrometer. Selenite solutions were prepared by dissolving a specific quantity of NaSeO3 in ultrapure water. Firstly, 2 g fly ash were weighed and transferred into a 50 ml polyethylene tube, and 50 ml selenite solutions were added to the tubes. Secondly, 1 g DS18 new material was weighed and transferred into a 1000 ml polyethylene tube and 800 ml selenite solutions were added to the tubes.
