文献类型：期刊文献

英文题名：A 1900-year record of mercury (Hg) from the east continental shelf of Hainan Island, South China Sea

作者：Ji, Chao[1];Xu, Liqiang[1,2];Zhang, Yihui[1];Guo, Min[1];Kong, Deming[3]

机构：[1]Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China;[2]Univ North Carolina Chapel Hill, Dept Geol Sci, Chapel Hill, NC 27599 USA;[3]Guangdong Ocean Univ, Coll Ocean & Meteorol, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China

年份：2020

卷号：55

期号：6

起止页码：4469

外文期刊名：GEOLOGICAL JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000497168600001)、、Scopus(收录号：2-s2.0-85075158024)、WOS

基金：Fundamental Research Funds for the Central Universities, Grant/Award Number: JZ2017HGTB0201, PA2018GDQT0020, and PA2018GDQT0007; National Natural Science Foundation of China, Grant/Award Number: 41402148

语种：英文

外文关键词：anthropogenic emission; environmental change; flux; marine sediment; radiocarbon dating

外文摘要：Natural archives are ideal tools for studying sedimentation history of mercury (Hg). However, record of Hg in marine sediments on millennial scales is less documented. This study analyzes a sedimentary core collected from the East Continental Shelf of Hainan Island, South China Sea. From Pb-210 and radiocarbon (C-14) chronological and geochemical analyses, a sequential record of Hg over the past 1900 years was reconstructed. Integrated analyses of Loss on Ignition (LOI), mean grain size, terrestrial elements aluminium (Al), rare earth element ( n-ary sumation REE) and Hg, allowed us to infer that Hg in the sediments received impacts from atmospheric deposition. Both concentrations and anthropogenic fluxes of Hg exhibit evident changes over the past 1900 years. Specifically, anthropogenic Hg flux in the last similar to 150 years is substantially high (mean 23.7 mu g/m(2)/yr), which is approximately 11 times greater (in terms of enrichment factor) relative to background. Generally, Hg concentrations in the bulk sediments before 1850 AD can be explained by natural processes, whereas, by contrast, the rapid increase in flux of Hg since the mid-19th century is related to deposition associated with anthropogenic release. The anthropogenic Hg flux shows a decrease by similar to 30 mu g/m(2)/yr since 1980s, consistent with the decline in global Hg production. Nevertheless, the anthropogenic Hg flux in the present day remains 6.5 times higher than the baseline (pre-1850 era).