Chalermpol Sirichotiwong. Accumulation and distribution of heavy metals in waters, sediment and snakeskin gaurami fish (Tricogaster pectoralis Regan) in fish raising pond at Amphawa district, Samut Songkhram province . Master's Degree(Technology of Environmental Management). Mahidol University. : Mahidol University, 2006.
Accumulation and distribution of heavy metals in waters, sediment and snakeskin gaurami fish (Tricogaster pectoralis Regan) in fish raising pond at Amphawa district, Samut Songkhram province
Abstract:
Five heavy metals (cadmium, copper, iron, lead and zinc) were studied in water,
sediment and Snakeskin Gaurani fish (Trichogaster pectoralis Regan) collected from four
sampling stations (inlet, outlet, far and middle) of the fish raising pond at Phraek Nam Daeng
sub-district, Amphawa district, Samut Songkhram province, Thailand. Samples were collected
for six months from June to November 2004. The research objective was to study the
accumulation of heavy metals in water, sediment and tissues of Snakeskin Gaurami fish and
the distribution of heavy metals in four sampling stations of the fish raising pond. The samples
were digested in a microwave digestion system and analyzed by using Frame and Graphite
Atomic Absorption Spectrometers. Statistical analysis was carried out with SPSS for
Windows 12 and a reliability interval of 95 % (P<0.05).
The results show that; Pb>Cu>Zn>Fe>Cd in water; Fe>Zn>Cu>Pb>Cd in sediment;
Fe>Zn>Cu>Pb>Cd in muscle and Fe>Zn>Cu>Pb>Cd in internal organ. The result revealed no
significant differences in any heavy metals in water and sediment of four sampling stations.
The amount of heavy metals accumulated was higher in internal organs than muscle in all six
months, except Pb in September and October.
A correlation of heavy metals in water and sediment found that Cd, Cu and Fe were
related in a positive direction, Zn was related in a negative direction and Pb was not related. In
water and muscle it was found that Pb was related in a positive direction, Cd, Cu, and Fe were
related in a negative direction and Zn was not related. In sediment and muscle it was found
that Zn was related in a positive direction, Cu was related in a negative direction and Cd, Fe
and Pb were not related. In water and internal organ it was found that Pb was related in a
positive direction, Cd, Cu and Fe were related in a negative direction and Zn was not related.
In sediment and internal organ it was found that Zn was related in a positive direction, Cu was
related in a negative direction, Cd, Fe and Pb were not related. In muscle and internal organ
found that Cu, Fe and Pb were related in a positive direction, Zn was related in a negative
direction and Cd was not related.
The correlation between the amount of heavy metals in muscle and internal organs
and fish length demonstrated that Cd in muscle and Pb in internal organs were related in a
positive direction, Cu, Fe and Zn in muscle and internal organs were related in a negative
direction and Pb in muscle and Cd in internal organs were not related.
From this study it was found that Fe, Cu and Zn levels were unacceptable for human
consumption according to FAO/WHO (1989) but acceptable from the ANZFA standard.