1. Full name:     Le Manh Cuong                                     2. Sex: Male

3. Date of birth:21-4-1988                                              4. Place of birth: Dan Phuong - Ha Noi

5. Admission decision number: 4050/QĐ-ĐHKHTN, Dated 19 September 2017 by the Rector of VNU University of Science

6. Changes in academic process: Decision number 1033/QĐ-ĐHKHTN, dated 25/04/2017 on the first 12 month extension to PhD candidature by the Rector of VNU University of Science.

7. Official thesis title: Synthesis and evaluation of water-based treatment of materials based on nanometer-sized manganese oxide on pyrolusite, laterite

8. Major: Inorganic Chemistry                                         9. Code: 624401 13                              

10. Supervisors:            Prof.Dr. Nguyen Trong Uyen

                                    Assoc.Prof.Dr. Nghiem Xuan Thung

11. Summary of the new findings of the thesis

- Find the optimized condition of pyrolysis substrate and laterite activation.

- Synthesize MnO2 materials sized <50 nm. MnOOH-FeOOH system sized 20-50 nm can be synthesized by co-precipitation method. In which, the amorphous MnO2 material and the MnOOH-FeOOH system have not been published.

- MnO2, MnOOH-FeOOH nanoparticles were activated on silicagen, pyroluzite, activated laterite, the appearance of them was proven by some modern physiological methods such as EDS, FTIR, XRF, XRD, SEM, TEM, Raman and BET.

- Materials created had the high adsorption capacity arsenic, ammonium, manganese and phosphate; the Langmuir isothermal adsorption process and arsenic adsorption were studied thoroughly by some modern physiological methods such as EDS, IR, Raman.

- Evaluate the possibility of textile wastewater treatment at Haprosimex Knitting Factory - Ninh Hiep Industrial Park - Gia Lam – Hanoi.

12. Paratical applicability, if any: The thesis is highly practical and it can be used in domestic water purification equipment to adsorb harmful cations and anions such as arsenic, ammonium, manganese, phosphate, organic matter. In addition, it can be used as a heterogeneous Fenton catalyst to treat textile wastewater and high organic matter wastewater.

13. Further research directions, if any: Research and design some technologies to apply these materials into water purification equipment in households.

14. Thesis-related publications:

[1] Le Manh Cuong, Nguyen Trong Uyen, Nguyen Thi Thu Phuong (2013), “Synthesis and evaluation of asen treating possibility of nanometer sized material MnO2 on silicagel, pyroluzite”, Journal of Chemistry, 51(3AB), pp.311-314.

[2] Le Manh Cuong, Nguyen Trong Uyen, Nghiem Xuan Thung, Tran Hong Con (2014), “The catalytic ability oxidation reaction for metylen blue dye by nano-sized MnOOH-FeOOH on laterite”, Journal of Chemistry, 52(5A), pp.205-207.

[3] Le Manh Cuong, Nguyen Trong Uyen, Nghiem Xuan Thung (2015), “The catalytic ability oxidation reaction for metylen blue dye by nano-sized MnO2 on pyroluzite”, Journal of Chemistry, 53(3E12), pp. 346-349.

[4] Le Manh Cuong, Nguyen Trong Uyen, Nghiem Xuan Thung, Tran Hong Con (2016), “Evaluation of asen, photphat absorbing capacity of nanometer sized, coprecipitated mixtures FeOOH-MnOOH in laterite”, Journal of Chemistry, 54(5e1,2), pp.348-351.

[5] Le Manh Cuong, Nguyen Trong Uyen, Nghiem Xuan Thung (2016), “Investigation of adsorption capacity of NH4+, Mn(II), phosphate by nano-sized MnO2 on pyroluzite”, Journal of Analytical Sciences, 21(4), pp.117-122

[6] Le Manh Cuong, Nguyen Trong Uyen, Nghiem Xuan Thung (2016), “Investigation of adsorption capacity of NH4+, Mn(II), phosphate by nano-sized MnO2 on pyroluzite MnO2 on laterite”, Journal of Analytical Sciences, 21(3), pp.116-123.