HEAVY METAL CONTENT IN WATER AND SEDIMENT OF SHRIMP FARMS OF SATKHIRA, BANGLADESH

Toxic contaminants moving along with runoff usually contaminates shrimp farms in most areas of Satkhira district, southwest Bangladesh. An investigation was carried out to assess the Physico-chemical properties and heavy metal concentration sediments water from Bangladesh during December 2020 March 2021. Twelve sediment samples were collected six Ghers two Upazilla e.g., Debhata Assasuni Satkhira. attributes such as temperature, DO, BOD5, pH, TDS, EC, turbidity, salinity, HCO3-/CO3-, SO4-, NO3-, PO4- estimated. The TDS (2280-5250 mg/l), EC (4380-9670 µs/cm), Turbidity (50.8-348 NTU), HCO3-/CO3- (219.6-445.3 NO3- (0.3635-1.94 mg/l) observed be higher than allowable standards recommended by WHO FAO. Five trace metals chromium (Cr), cadmium (Cd) copper (Cu), lead (Pb) Zinc (Zn), measured Atomic Absorption Spectrometer. range concentrations follows: Cr (1.95–3.43 Zn (205.76-265.71 mg/kg), Cu (0.60–1.1mg/kg), Cd (3.8-4.1 Pb (0.92-1.11mg/kg wet weight. (0.1-0.8 (0.003-0.34 (0.10-0.13 (0.07-0.08 (0.23-0.34 mg/l). Higher recorded studied except Cu, those below standard prescribed ranges 0.602 1.113 mg/kg 0.10 0.13 mg/l 1.95 3.43 0.156 0.807 respectively. However, Cd, suggest that could contaminated these well.