Kannan K, Smith R G, Lee R F, Windom H L, Heitmuller P T, Macauley J M, Summers J K
Skidaway Institute of Oceanography, Savannah, Georgia 31411, USA.
Arch Environ Contam Toxicol. 1998 Feb;34(2):109-18. doi: 10.1007/s002449900294.
Concentrations of total mercury and methyl mercury were determined in sediment and fish collected from estuarine waters of Florida to understand their distribution and partitioning. Total mercury concentrations in sediments ranged from 1 to 219 ng/g dry wt. Methyl mercury accounted for, on average, 0.77% of total mercury in sediment. Methyl mercury concentrations were not correlated with total mercury or organic carbon content in sediments. The concentrations of total mercury in fish muscle were between 0.03 and 2.22 (mean: 0.31) micrograms/g, wet wt, with methyl mercury contributing 83% of total mercury. Methyl mercury concentrations in fish muscle were directly proportional to total mercury concentrations. The relationship of total and methyl mercury concentrations in fish to those of sediments from corresponding locations was fish-species dependent, in addition to several abiotic factors. Among fish species analyzed, hardhead catfish, gafftopsail catfish, and sand seatrout contained the highest concentrations of mercury. Filtered water samples from canals and creeks that discharge into the Florida Bay showed mercury concentrations of 3-7.4 ng/L, with methyl mercury accounting for < 0.03-52% of the total mercury. Consumption of fish containing 0.31 microgram mercury/g wet wt, the mean concentration found in this study, at rates greater than 70 g/day, was estimated to be hazardous to human health.
测定了从佛罗里达河口水域采集的沉积物和鱼类中总汞和甲基汞的浓度，以了解它们的分布和分配情况。沉积物中总汞浓度范围为1至219纳克/克干重。甲基汞平均占沉积物中总汞的0.77%。甲基汞浓度与沉积物中的总汞或有机碳含量无关。鱼肉中总汞浓度在0.03至2.22（平均：0.31）微克/克湿重之间，其中甲基汞占总汞的83%。鱼肉中甲基汞浓度与总汞浓度成正比。除了几个非生物因素外，鱼类中总汞和甲基汞浓度与相应位置沉积物中汞浓度的关系还取决于鱼类种类。在所分析的鱼类中，硬头鲶、短须鲶和沙鳟的汞含量最高。排入佛罗里达湾的运河和小溪的过滤水样显示汞浓度为3 - 7.4纳克/升，其中甲基汞占总汞的<0.03 - 52%。以大于70克/天的速率食用含0.31微克汞/克湿重（本研究中发现的平均浓度）的鱼类，估计对人体健康有害。
