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