• Synthesis of nanosized mixed oxide materials of rare earth-manganese system
• Fabrication and installation of 5 equipment containing adsorption material for NH₄⁺, As, Fe, Mn in drinking water

• Theoretical results: Study on the sorption ability for NH₄⁺, As, Fe, Mn in drinking water
• Applied results: The manufacturing adsortion materials and equipment for removing NH₄⁺, As, Fe, Mn in drinking water

• In this study, a novel CeO_2^-Mn₂O₃ mixed oxide adsorbent with high sorption capacity for both arsenic and ammonium was prepared and used to arsenic and ammonium removed from water.
• Nanosized perovskites LaMnO₃, NdMnO₃, PrMnO₃ and nanocomposite CeO₂-Mn₂O₃ have been synthesized at low temperature by the combustion of gel prepared from polyvinyl alcol (PVA) and metal nitrates.
• The specific surface area of LaMnO₃, PrMnO₃, NdMnO₃ and CeO₂-Mn₂O₃ mixed oxides was measured to be 27,6; 20,5; 21,5; and 65,3 m²/g using the Brunauer-Emmett-Teller method. The prepared LaMnO₃, PrMnO₃, NdMnO₃ and CeO₂-Mn₂O₃ adsorbents were composed of nanoparticles in the sized: 24,5; 32,19; 27,35 and 24,59 nm and had high sorption capacity up to 87,51; 66,15; 73,34 and 154,54 mg/g for ammonium respectively.
• 5 equipments were prepared and used for supplying safe water according to the Vietnam Standard for drinking water.

• Scientific papers in referred journals:

1. Luu Minh Dai, Dao Ngoc Nhiem, Duong Thi Lim, Pham Ngoc Chuc. Synthesis nanostructured perovskite NdMnO3 by gel combustion method. Journal of Chemistry, T48 (4A), pp.206-210, 2010.
2. Luu Minh Dai, Dao Ngoc Nhiem, Vu The Ninh, Pham Ngoc Chuc, Duong Thi Lim. Application of Nanomaterials LaMnO3 for adsorbing iron, manganese, arsenic and ammonium. Journal of Chemistry, T48 (4C), pp.206-210, 2010.
3. Luu Minh Dai, Dao Ngoc Nhiem, Duong Thi Lim. To study the effect of the Ce/Mn molar on to the ammonium adsorption capacity in the Ce-Mn mixed oxide system. Journal of Chemistry, T.49(3A), pp.51-55, 2011.
4. Luu Minh Dai, Dao Ngoc Nhiem, Duong Thi Lim. The rare earth (Pr, Nd, La)-manganese perovskite nanomaterials for removing ammonium ion from aqueous solutions. Journal of Chemistry, T.49(3A), pp.75-79, 2011.

• Technological products: 500g of nanocomposite oxides materials of rare earth-manganese system; process for manufacturing adsorption material; 05 devices containing adsorption material with capacity of 100 l/h.
• Other products: Guide 01 post graduate; Paper presented at Science Congress “Synthetic nanoscale mixed oxide systems La (Ce)-Mn and assess their ability to absorb ammonia, arsenic, iron and manganese”, The conference celebrated the 35th anniversary of Vast, Hanoi.

• The Nguyen Van Vien’House Tam Di commune, Luc Nam District, Bac Giang province
• The Nguyen Khac Nam’House Tay Tuu commune, Tu Liem district, Hanoi city
• The Phan Van Tap’House Tay Tuu Commune, Luc Nam District, Bac Giang province
• The Nguyen Van Tao’House Tam Di, Luc Nam District, Bac Giang province
• The Nguyen Khac Dong’House Tay Tuu commune, Tu Liem district, Hanoi city

On the basis of the project research team hopes to receive the support from the leaders of the Institute of Science and Technology of Vietnam, Institute of Materials Science and propose the implementation level independent project of VAST Vietnam to improve technology for manufacturing nanosized adsortion materials, equipment, patent and application of equipment for removing ammonia, arsenic from the water shallow-well.