【摘要】 <正> 沉积物是海洋重金属污染物的积蓄场所,能较好地记录海区的污染状况;同时,沉积物中污染物含量比海水高得多,便於分析。因此,沉积物的污染调查已成为评价海域污染状况,特别是确定局部污染源的重要手段之一。为了估计厦门海区汞的污染状况,我们详细地调查了沉积物中汞含量的分布,並用有机质校正汞含量和判别污染站位,评价了汞在沉积物中的污染状况,比较了厦门海区与东海海域沉积物中的汞含量。更多还原

【Abstract】 The average concentration of mercury in the sediment around Xiamen Island was found to be 68.2 ppb. In the determination of the background level of mercury, several factors that may affect mercury concentration in the sediment, such as location differences, environmental factors, sediment matrix and pollution were considered. Mercury concentration/organic matter regression was used to correct mercury concentration in the calculation of its background level.As a results of correction, the sediments around Xiamen Island are not polluted by mercury except for a few contaminated sites. The comparison of the corrected background value between the Xiamen area and the Changjiang and Chiantangjian Estuaries suggests that their background levels are in great consistence, the slope values being 5.4 and 5.6 (ng/mg), respectively.更多还原