The paper presents the modification of Phu Yen diatomite by oxidationreduction
reaction between Fe (II) and KMnO4 salts in solution pH = 6
on the diatomite surface. Characteristics of modified materials and the
influence of research factors on these characteristics were investigated
using techniques XRD, EDX, XPS, SEM, TEM, BET. Arsenic adsorption
capacity of modified materials, the influence of environmental factors
on the adsorption capacity were also investigated and evaluated. The
results showed that mixed oxide-modified diatomite has higher arsenic
adsorption capacity than natural diatomite and modified diatomite by
individual oxides.