Compound metal oxide de-fluorine sorbent

Abstract

A complex metal oxide used as an adsorbent for removing fluorine from water is prepared from the transition metal chosen from Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn, aluminum and RE metal chosen from Ce and La in the mole ratio of (0.5-1.5): (2-6): (0.5-1.5) through dissolving them in water to become aqueous solution, dropping alkali solution to make its pH=9.0-9.5, laying aside, centrifugal washing and separating by deionized water, drying, and grinding.

Description

technical field

[0001] The invention belongs to the technical field of adsorption materials, in particular to a composite metal oxide fluorine removal adsorbent. Background technique

[0002] Fluorosis caused by drinking high-fluoride water is one of the most widely distributed endemic diseases in the world. In addition to Shanghai, other provinces, autonomous regions and municipalities in China have found drinking-water fluorosis. Therefore, there are strict requirements on the fluorine content in drinking water in the world. The World Health Organization stipulates that the allowable concentration of fluorine in drinking water is 0.6-1.5mg / L, and the maximum allowable concentration of fluorine in drinking water in my country is 1mg / L. The maximum allowable discharge concentration of fluorine inorganic compounds in wastewater is 10mg / L. Among the numerous methods for defluoridation of drinking water, adsorption is considered to be the most promising method. The key to the...