Nghiên cứu tổng hợp vật liệu oxit hỗn hợp sắt mangan trên nền diatomite Phú Yên và khả năng ứng dụng làm chất hấp phụ loại bỏ Asen trong môi trường nước

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.