Synthesis of Fe(Ⅲ)-Based Inorganic Sorbent and its Application for Arsenic Sorption

摘要

The efficiency of application of various iron compounds for purification of aqueous media from arsenic has been studied. It is proposed to apply the active layer to a substrate of a coarser material to improve the filterability. Alumina, quartz, and crystalline sulfur are considered as carrier materials. The conditions of inorganic sorbent synthesis based on iron oxyhydrate (IOH) are determined. Effect on sorbent capacity for As (V) of the concentration of iron and sodium sulfate in the solution at the modification of alumina is determined. The results of X-ray phase analysis and scanning electron microscopy are presented. The data on the capacity of the obtained sorbent modifications for the sorption of As (V) ions under static conditions are presented. The dependence of the capacity of the sorbent for As (V) on the method of synthesis of IOH and the type of carrier is established. It is shown that the sorbent on the basis of SiO_2 possesses maximum capacity.