1. Full name: Le Sy Chinh                                                         2. Gender: Male

3. Date of birth:              01/10/1982                                           4. Place of birth: Thanh Hoa

5. Number of admission decision: Decision 422/QĐ-SĐH, dated on 2th March 2016 by the Rector of VNU University of Science.

6. The changes in academic process: None

7. Title of thesis: Treatment measure for wastewater from Pb –Zn ore exploitation and processing in Bac Kan Province.

8. Major: Soil and Water Environment                             9. Code: 62440303

10. Supervisors: 1. Prof. Dr. Mai Trong Nhuan

2. Assoc. Prof.Dr. Sci. Nguyen Xuan Hai

11. Summary of the new findings of thesis:

- Sorption materials were modified from iron mine drainage sludge, and native plant species (Phragmites australis) was used and treatment of wastewater contaminated with heavy metals in Pb-Zn mines was assessed;

- The combination/integration of modified material and native plant species was assessed as an effective measure for treatment of wastewater from Pb-Zn ore exploitation and processing in Lung Vang area (Cho Don - Bac Kan).

12. Practical applied capability

The combination of mineral materials and plant for treatment of wastewater from Pb – Zn ore exploitation and processing was proposed on the basis of using mine drainage sludge and native plant species. The results of laboratory experiments and pilot scale in Lung Vang (Cho Don, Bac Kan) demonstrate remediation and cost effectiveness and environment-friendliness of this treatment measure. The increase of treatment demand for ore exploitation and processing wastewater, the abundant supply of iron mine drainage sludge, wide distribution, and well adaptive capacity of Phragmites australis indicate the high application perspectives of this treatment measure in Vietnam.

13. Further research directions:

- Treatment measure for wastewater from Pb –Zn ore exploitation and processing should be widely applied other mines in Bac Kan province similar polymetallic mines.

- Treatment of used modified mineral material and native plant (Phragmites australis) should be assessed and tested.

14. Thesis-related publications:

1. Le Sy Chinh, Mai Trong Nhuan, Nguyen Xuan Hai, Nguyen Thi Hai, Dang Ngoc Thang, Nguyen Tai Giang, Doan Dinh Hung, Nguyen Trung Minh, Nguyen Manh Khai, Tran Dang Quy and Nguyen Thi Hoang Ha, The influence of sodium silicate on removal of heavy metals by iron mine tailing, ARPN Journal of Engineering and Applied Sciences, ISSN 1819-6608,Vol. 11, No. 21, November 2016. p. 12555-12560.

2. Le Sy Chinh, Mai Trong Nhuan, Nguyen Xuan Hai, Nguyen Thi Hai, Dang Ngoc Thang, Nguyen Tai Giang, Tran Dang Quy, Nguyen Thi Hoang Ha, The Potential of modified iron mine drainage sludge for treatment of water contaminated with heavy metals. VNU Journal of Science, Earth and Environmental Sciences 32(1S), 45-52. (Vietnamese).