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Total mercury and methylmercury distributions in surface sediments from Kongsfjorden, Svalbard, Norwegian Arctic

【标题】Total mercury and methylmercury distributions in surface sediments from Kongsfjorden, Svalbard, Norwegian Arctic

【Title】Total mercury and methylmercury distributions in surface sediments from Kongsfjorden, Svalbard, Norwegian Arctic

【DOI】10.1007/s11356-014-3942-0

【作者】 刘杨; 陆志波; 张洁; 蔡明红

【Author】 Zhang Jie ; Cai Minghong

【期刊】Environ Sci Pollut Res

【Journal】Environ Sci Pollut Res

【期刊年份】2014

【卷】

【期】

【关键词】 Totalmercury . Methylmercury . Surface sediments . Kongsfjorden . Methylation

【Keywords】 Totalmercury . Methylmercury . Surface sediments . Kongsfjorden . Methylation

【摘要】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.

【Abstract】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.

【基金/项目】 全氟(多氟)烷基化合物(PFASs)在全球海洋中的分布与长距离传输机制研究 ; 填埋场覆盖土-植被-大气间汞的交换机制对汞的形态分布及释放通量的影响研究 ; 白令海峡与北冰洋太平洋扇区表层沉积物中典型痕量金属环境基线值及生态风险

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