[1] Univ Sci, Vietnam Natl Univ, Fac Environm Sci, Hanoi 334, Vietnam
[2] Vietnam Acad Sci & Technol, Grad Univ Sci & Technol, Hanoi, Vietnam
[3] Natl Univ Civil Engn, Fac Environm Engn, Hanoi, Vietnam
[4] Vietnam Acad Sci & Technol, Inst Chem, Dept Appl Analyt, Hanoi, Vietnam
[5] Vietnam Acad Sci & Technol, Inst Environm Technol, Dept Environm Water Qual Anal, Hanoi, Vietnam