SUMMARY

Geochemistry of fluorine and its role for the community health in Việt Nam

Quách Đức Tín, Đoàn Thị Ngọc Huyền, Nguyễn Thị Minh Ngọc, Nguyễn Văn Luyện, Nguyễn Hồng Quang, Mai Trọng Tú

Fluorine is an essential trace element for life. According to "drinking water hygiene standards" promulgated together with the Health Minister's Decision No 1329/2002/BYT/QD, the concentration of fluorine in the drinking water should be in range of 0.7 mg/l <F <1.5 mg/l. Both excessive and inadequate fluorine intake are associated with health problems by fluorosis (i.e. dental, skeletal diseases), decreased thyroid function or brain injury.

Researches in Việt Nam have been revealing a normal level of fluorine appearing in several food species. However, deficiency of fluorine in water environment has been determined in some localities, such as Hà Nội, Lạng Sơn and the Mekong delta. Whereas some other areas, such as Vạn Ninh, Ninh Ḥa, Cam Ranh (Khánh Ḥa Province) and some localities in Thái B́nh, B́nh Định and Ninh Thuận provinces have very high fluorine concentration in groundwater.

For community health protection, it is necessary to clarify sites with either deficiency or abundancy of fluorine concentration in environment, as a basis for applying appropriate countermeasures to add or remove fluorine to the optimum concentration in drinking water and food. Therefore, an integrated research on geochemical behaviour and natural distribution of F in geological environment is urgently needed. This article reveals remaining problems in current researches on fluorine and gives some orientations on fluorine related action plan in Việt Nam in the coming time.  

Ngày nhận bài: 25/8/2009.

Người nhận xét: TS. Nguyễn Thành Vạn

(Tổng hội Địa chất Việt Nam)