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本文采用H_2SO_4-KNnO_4-K_2S_2O_8快速消化,然后用冷原子荧光测汞仪测定汞的方法,测定了渤海湾海域27个站的表层沉积物中的汞含量。结果表明,表层沉积物中汞的浓度为0.025至0.170 mg/kg,平均为0.054mg/kg。水平分布以蓟运河口为最高,湾西部比湾中部高些。 沉积相中的汞含量与沉积相中有机质含量和水体中悬浮体含量成正相关,而与盐度成负相关。
In this paper, H_2SO_4-KNnO_4-K_2S_2O_8 was rapidly digested and then mercury was determined by cold atomic fluorescence mercury determination. The mercury content in surface sediments of 27 stations in Bohai Bay was measured. The results showed that the concentration of mercury in surface sediments was 0.025 to 0.170 mg / kg with an average of 0.054 mg / kg. The horizontal distribution is the highest in the Jiyun estuary, and the west of the bay is higher than the middle of the bay. The mercury content in the sedimentary facies is positively correlated with the organic matter content in the sedimentary facies and with the suspended matter content in the water, but negatively with the salinity.