Spatial distribution of dissolved Pb, Hg, Cd, Cu and As in the Bohai Sea.

摘要: Characteristics of the spatial distribution selected dissolved heavy metals were analyzed during large scale surveys from August 12 to 25, 2003 in Bohai Sea. Dissolved Pb was only element with average concentrations higher than grade-one sea water quality standard China. The surface similar those Cd, Cu and As, where isopleths generally indicated decreasing values bays central areas. Only for Hg did high not appear Liaodong Bay, Bay Laizhou but also Central Area, viz. inshore offshore Vertical distributions Pb, As largely uniform, while that increased depth. We infer input pollutants land main influencing factor detected patterns metals, followed by dynamics water, release bottom sediments biochemical processes. Comparing historical data, decline recent years.