Total mercury and methylmercury distributions in surface sediments from Kongsfjorden, Svalbard, Norwegian Arctic
Total mercury and methylmercury distributions in surface sediments from Kongsfjorden, Svalbard, Norwegian Arctic
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挪威北极斯瓦尔巴群岛孔斯峡湾表层沉积物中的总汞和甲基汞分布。
DOI：
10.1007/s11356-014-3942-0
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发表时间：
2015-06-01
影响因子：
5.8
通讯作者：
Cai, Minghong
中科院分区：
文献类型：
--
作者：
Liu, Yang;Chai, Xiaoli;Cai, Minghong
研究了挪威北极斯瓦尔巴群岛Kongsfjorden表层沉积物中总汞和甲基汞的分布特征。结果表明，THg的浓度范围为9.11至86.73 ng g（-1），而甲基汞浓度的平均值只有0.11 ng g（-1）。研究了影响汞的分布和甲基化转化的因素，结果表明，洋流和冰川的运动影响了THg的分布。沉积物中总有机碳（TOC）和总氮含量与总汞浓度呈正相关，表明沉积物中总汞的分布主要受沉积物中有机质的控制。THg和S含量之间存在复杂的关系，可能是由于常年科学考察中涉及的人类活动。甲基汞和总汞表现出类似的相关性与沉积物的化学特征，所有站的甲基汞可能会产生本地通过微生物甲基化的汞。
The total mercury (THg) and methylmercury (MeHg) distributions in the surface sediments of Kongsfjorden, Svalbard, in the Norwegian Arctic were investigated in this study. The results showed that THg concentrations ranged from 9.11 to 86.73 ng g(-1), whereas MeHg concentrations had an average of only 0.11 ng g(-1). Factors that control the distribution and methylated transformation of mercury were examined, and the results suggested that the movements of ocean currents and glaciers affect the THg distribution. The total organic carbon (TOC) and N contents in the sediments were positively correlated with THg concentration, which indicated that the THg distribution at these stations was primarily controlled by organic matter in the sediments. A complex relationship was observed between the THg and S contents, possibly due to anthropogenic activities involved in the perennial scientific expedition. MeHg and THg exhibited similar correlations with the sediment chemical characteristics for all stations suggesting that MeHg may be produced locally through the microbial methylation of mercury.