Nuntawat Monboonpitak. Distribution and accumulation of some heavy metals in greasyback shrimp, Metapenaeus ensis (de Haan, 1844) from markets of the upper gulf of Thailand. Master's Degree(Technology of Environmental Management). Mahidol University. : Mahidol University, 2009-07-23.
Distribution and accumulation of some heavy metals in greasyback shrimp, Metapenaeus ensis (de Haan, 1844) from markets of the upper gulf of Thailand
Abstract:
This study was conducted to determine and compare the levels of five heavy
metals (Zn, Cu, Cd, Cr and Pb) accumulation and distribution in greasyback shrimp.
Greasyback shrimp were collected from nine markets of three coastal areas in the
upper Gulf of Thailand during rainy and cold seasons.
The samples were digested with concentrated nitric acid in a microwave digestion
system and determination for five heavy metals was carried out by using a Flame
Atomic Absorption Spectrometer (FAAS) and Graphite Furnace Atomic Absorption
Spectrometer (GFAAS). As for relevant statistical analysis, they were performed with
the computer program SPSS for Windows 11.5, which has a reliability level of 95%
(P<0.05).
The results obtained revealed that the levels of heavy metals (Zn, Cr, Cd and Pb)
in greasyback shrimp of three coastal areas were not significantly different, except Cu
level of greasyback shrimp from the inner gulf. The levels of heavy metals in rainy
and cold seasons were not significantly different, except the Pb level of greasyback
shrimp from the inner gulf. There were no significant differences in heavy metal levels
between male and female greasyback shrimp, except the Cd level. The levels of heavy
metals in cephalothorax and abdomen of greasyback shrimp were significantly
different, except the Pb and Cr levels.
The levels of five heavy metals in greasyback shrimp were not over the
maximum limit of the Ministry of Public Health and Codex. Thus, the levels of heavy
metals in greasyback shrimp from the upper Gulf of Thailand do not pose a health
hazard for consumers.