1. Mientrung Institute for Scientific Research, Vietnam Academy of Science and Technology, Hue 530000, Vietnam
2. University of Education, Hue University, Hue 530000, Vietnam
3. The University of Danang-University of Science and Education, Danang 550000, Vietnam
4. Hue University, Hue 530000, Vietnam
5. Faculty of Chemical Technology-Environment, The University of Danang-University of Technology and Education, 48 Cao Thang, Danang 550000, Vietnam
6. Faculty of Geology & Mineral Resources Engineering, Ho Chi Minh University of Natural Resources and Environment, Ho Chi Minh 700000, Vietnam
7. University of Sciences, Hue University, Hue 530000, Vietnam
8. Hoa Binh University, Hanoi 100000, Vietnam
9. The University of Danang-University of Science and Technology, Danang 550000, Vietnam