Study on preparation of multi-oxide photocatalysts containing CeO2/La2O3 from Vietnamese rare earths to treat ammonium, phosphate and bacterial contamination in To Lich river water

Nhan Nguyen Thi, Long Ha Phuong, An Nguyen Thi Thu, Hien Vu Duy, Nhiem Dao Ngoc, Thom Dang Thi, Hung Phan Do, Thiem Pham Van, Thanh Cao Dinh, Cuong Nguyen Huy, Tuyen Nguyen Dinh

Abstract


An integrated new method using multi-oxide photocatalyst materials to treat ammonium and phosphate while killing pathogenic microorganisms in poluttion water. This new method involves the simultaneous use of two types of materials: multi-oxides photocatalyst materials ZnO-MgO-TiO2 (MOX) activated under sunlight, forming free radicals hydroxyl/ superoxide to oxidize and kill pathogenic bacteria and fungi. Multi-metallic oxides were modified with rare earth oxides CeO2/La2O3 (DLQDH) to enhance the removal activity of ammonium and phosphate by crystallization process MgNH4PO4 (MAP). The material samples were characterized by XRD, SEM, UV-Vis, FTIR, EDX, XRF...and evaluated the ability to simultaneously removal of ammonium and phosphate, killing typical bacterial strains (Vibrio parahaemolyticus (VP), Staphylococcus aureus (XSA), E. coli - Coliform (EC) present in To Lich river water under sunlight irradation. Ammonium,  phosphate removal capacity  and bactericidal efficiency results  showed  that these integration method  has potential for practical applications to treat pollution water in the To Lich River as well as other wastewater or agriculture water sources contaminated with ammonium, phosphate and pathogenic microorganisms. 


Keywords


Rare earth oxides; Antibacteria; Vibrio Parahaemolyticus, Staphylococcus aureus;Multi oxide photocatalysts

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DOI: https://doi.org/10.51316/jca.2021.141

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