1. Full name: Pham Thi Mai Huong                                 2. Sex: Female

3. Date of birth: 5st July, 1976                                       4. Place of birth: HA NOI

5. Admission decision number: Number 3485/QD-KHTN-CTSV Date 14st September by  Rector of VNU University of Science.

6. Changes in academic process: None.

7. Official thesis title: Study on the modification of the Tan Rai red mud to use for removal of heavy metals and toxic anions in aqueous solution.

8. Major: Environmental chemistry                                  9. Code: 62440120

10. Supervisors:  1. Associate Professor Doctor Tran Hong Con

                          2. Associate Professor Doctor Tran Thi Dung      

11. Summary of the new findings of the thesis:

- Study on the modification of the Tay Nguyen red mud which based on neutralization of the red mud by acid (RMA) and water (RMW) to pH 7 and heat treatment. The material adsorbed capacity of ions such as As(V), Pb(II), NH4+, NO2- was investigated. The results showed that the adsorbed capacity of ions in aqueous solution depends on the transformation of phase structure and composition of metals oxide/hydroxide in the modified red mud.

-  Study on the Tay Nguyen red mud which was removed the aluminium and other soluble components in alkaline solution (RM-Fe). The RM-Fe material was heat treated  causing the phase transformation of iron oxide/hydroxide. The results showed that the material had the high adsorbed capacity with ion As(V), Pb(II), NH4+, NO2- especially As(V). This is the special characterization of iron oxide/hydroxide materials.

-  Study on the zeolite synthesized from Tay Nguyen red mud based on the silic and aluminum oxide and  remain the iron oxide. The zeolite was synthesized directly on red mud by addition of single silicon (signed as RM ZeO-Si) and both silicon and aluminum portion (signed as RM ZeO-Si/Al). The structure of zeolite was studied by X-Ray diffraction and IR absorption spectra, which indicated  the appearance of zeolite crystalline with formula of Na8(Al6Si6O24)S.4H2O and hematite (Fe2O3). The adsorption ability of zeolite for As(V), Pb(II), NH4+, NO2- ions was investigated. The results showed that the synthetic zeolite has a high ability to adsorb cations such as Pb(II), NH4+ (cation exchange capacity of zeolite ) and a high adsorbed capacity  for As(V)  by the hematite (Fe2O3).

12. Practical applicability, if any: The new materials modified from the Tay Nguyen red mud could have a high potential to use for removal of heavy metals and toxic anions  from aqueous solution.

13. Further research directions, if any: R&D.

14. Thesis-related publications:

1. Pham Thi Mai Huong, Tran Hong Con, Nguyen Van Thom “Study on the modification of the Tay Nguyen red mud to removal of arsenate in aqueous solution.”,  Viet Nam Journal of Chemistry, 53(5e3) (2015), pp. 152-156.

2. Pham Thị Mai Huong, Tran Hong Con, Tran Thi Dung, “Investigation of lead (II) removal from waste water by denaturized Tay Nguyen red mud”, VNU Journal of Science, 32(3) (2016), pp.62-68.

3. Pham Thị Mai Huong, Tran Hong Con, Tran Thi Dung “Study on the adsorption of Pb(II) in aqueous solution by iron oxyhidroxides and oxides separated from Tay Nguyen red mud”, Journal of Science and Technology-Ha Noi University of Industry , 38 (2017), pp.69-74.

4. Pham Thị Mai Huong, Tran Hong Con, Tran Thi Dung “Study on the adsorption of arsenate in aqueous solution by Tay Nguyen red mud after separating the aluminium and other soluble components in alkaline solution ”, VNU Journal of Science, 33(1) (2017), pp. 26-35.

5. Pham Thị Mai Huong, Tran Hong Con, Tran Thi Dung “Study on the adsorption of nitrite in aqueous solution by modified Tay Nguyen red mud”,  Journal of Catalysis & Adsorption,Vietnam, 6(1) (2017), pp. 37-43.

6. Pham Thị Mai Huong, Tran Hong Con, Tran Thi Dung “Investigation of Ammonium and nitrite Removal by Zeolite Material Synthesized on Red mud Base”, Environment Asia, 10(2) (2017), pp. 86-93.