ECOTOXICOLOGICAL RISK ASSESSMENT OF TRIBUTYL PHOSPHATE (TBP) IN LAKES IN HANOI, VIETNAM

Abstract

Tributyl Phosphate (TBP) is a organophosphate flame retardant, which was
an common constituent in various domestic and agriculture products, industrial
prduction and building materials. However, TBP is a potential neurotoxin and
can promote the risk of cancer. Therefore, in this sutdy, the occurence of TBP
water in three big lakes in Hanoi (West, Bay Mau and Yen So lakes) were
investigated in order to determine the ecotoxicological risk of TBP to the aquatic
biota. TBP was found in all the water sample with the concentration varied from
2.57 to 8.93ng/L. Yen So lake had the highest concentraion of TBP. A risk
assessment were calculated for five aquatic species (Green algae, Brine shimp,
Water flea, Zebra danio, and Goldfish). The calculated risk quotient (RQ) were
below 0.0036, indicated that there were no significant risk from TBP in lake
water to the five aquatic species in the survey areas.