Econ. Environ. Geol. 2004; 37(3): 335-345
Published online June 30, 2004
© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY
Correspondence to : Choon Ki Na
Total and extractable contents of heavy metals were measured in sediment and seafood from Bukhang and Boggil-ritidal flats along the Mokpo coastal area, south-western part of Korean peninsular in order to assess the degree of metal pollution, metal bioavailability and metal bioccumulation. The metal concentrations, except Pb were found to be greater than the background concentrations of sediments indicating the progress of cumulative contamination by anthropogenic origin of metals. The order of extractable metal concentrations in sediments were Mn(32-53 mg/kg)>Zn(14-42 mg/kg)>Cu(2.5-17.0 mg/kg)>Pb(2.4-6.8 mg/kg)Cd(0.5-0.7 mg/kg). However, the amount of metals associated with extractable fraction of sediments were significantly high in Bukhang relative to Boggil-ri. Significant bioaccumulation of all metals, except Pb were observed in seaweed and benthos. The order of bioaccumulation of metals were: in concentration; all biota commonly, Mn(129-374 mg/kg)>Zn(19-106 mg/kg)>Cu(6-87 mg/kg)>Cd(4.6-7.6 mg/kg)>Pb(0.2-3.7 mg/kg), in BCF; Enteromorpha, Cd>Mn>Cu>Zn>Pb, Ilyoplax deschampsi, Cu>Cd>Mn>Zn>Pb, Ure-chis unicinctus, Cd>Zn>Mn>Cu>Pb. Some metal concentrations of Enteromorpha, especially Cu, Zn, weakly Pb in bukhang, Mn, Cd in boggili-ri, were correlate well with concentrations in sediment, indicating relatively more contaminated by the anthropogenic origin of metals in each tidal flat. The results clearly indicate that the seafood of bukhang, even of Boggili-ri known as clean area, are contaminated with metals.
Keywords tidal mudflat, sediments, heavy metal, bioavailability, bioaccumulation
Econ. Environ. Geol. 2004; 37(3): 335-345
Published online June 30, 2004
Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.
Choon Ki Na
Department of Environmental Engineering, Mokpo National University, Jeonnam 534-729, Korea
Correspondence to:
Choon Ki Na
Total and extractable contents of heavy metals were measured in sediment and seafood from Bukhang and Boggil-ritidal flats along the Mokpo coastal area, south-western part of Korean peninsular in order to assess the degree of metal pollution, metal bioavailability and metal bioccumulation. The metal concentrations, except Pb were found to be greater than the background concentrations of sediments indicating the progress of cumulative contamination by anthropogenic origin of metals. The order of extractable metal concentrations in sediments were Mn(32-53 mg/kg)>Zn(14-42 mg/kg)>Cu(2.5-17.0 mg/kg)>Pb(2.4-6.8 mg/kg)Cd(0.5-0.7 mg/kg). However, the amount of metals associated with extractable fraction of sediments were significantly high in Bukhang relative to Boggil-ri. Significant bioaccumulation of all metals, except Pb were observed in seaweed and benthos. The order of bioaccumulation of metals were: in concentration; all biota commonly, Mn(129-374 mg/kg)>Zn(19-106 mg/kg)>Cu(6-87 mg/kg)>Cd(4.6-7.6 mg/kg)>Pb(0.2-3.7 mg/kg), in BCF; Enteromorpha, Cd>Mn>Cu>Zn>Pb, Ilyoplax deschampsi, Cu>Cd>Mn>Zn>Pb, Ure-chis unicinctus, Cd>Zn>Mn>Cu>Pb. Some metal concentrations of Enteromorpha, especially Cu, Zn, weakly Pb in bukhang, Mn, Cd in boggili-ri, were correlate well with concentrations in sediment, indicating relatively more contaminated by the anthropogenic origin of metals in each tidal flat. The results clearly indicate that the seafood of bukhang, even of Boggili-ri known as clean area, are contaminated with metals.
Keywords tidal mudflat, sediments, heavy metal, bioavailability, bioaccumulation
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