School of Geography, South China Normal University, Shipai Campus, Guangzhou, 510631, China.
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China.
Environ Sci Pollut Res Int. 2019 Mar;26(8):7512-7524. doi: 10.1007/s11356-019-04138-w. Epub 2019 Jan 18.
Geochemical records from peatlands are important tools for the interpretation of environmental signals preserved in the peat and the understanding anthropogenic impacts on remote mountain regions. In this paper, six Pb-dated peat cores located at 500-1900 m above sea level (asl) in the Changbai Mountains were used to reconstruct the pollution history over the past 150 years in northeastern (NE) China. The cores physicochemical parameters and 10 key chemical elements were analyzed by inductively coupled plasma atomic emission spectroscopy (ICP-AES). Results from loss on ignition (LOI), total organic carbon (TOC), and lithogenic element (Ti, Fe, and Mn) analysis show that the peatlands (Ch, Yc1 and Jb) over 900 m asl are ombrotrophic and the lower altitude peatlands (Dng, Jc, and Ha) are minerotrophic. There is a decreasing trend of trace element distribution with the altitude, mainly due to the local source input. The content of the magnetic particles and trace elements (Cu, Ni, Pb and Zn) as well as their accumulation rates document 150 years of pollution history in the Changbai Mountain region. There is a significant elevated pattern of the geochemical records after the New China, which might mark the start date of Anthropocene since the 1950s in this region. The peatlands at the lower altitude (i.e., Dng and Ha) record the earliest fingerprints of metal contamination due to the starting period of massive reclaiming and immigrating in the Changbai Mountain region. The major increase of trace elements since the 1980s probably suggests a significant deterioration of the local environment due to the fast industrial and urbanization development after the Reform and Opening up in China.
泥炭地的地球化学记录是解释保存在泥炭中的环境信号以及了解人为对偏远山区影响的重要工具。在本文中，利用长白山海拔 500-1900 米处的 6 个 Pb 测年泥炭芯，重建了过去 150 年来中国东北地区的污染历史。通过电感耦合等离子体原子发射光谱法（ICP-AES）对芯理化参数和 10 种关键化学元素进行了分析。灼烧损失（LOI）、总有机碳（TOC）和岩源元素（Ti、Fe 和 Mn）分析的结果表明，海拔 900 米以上的泥炭地（Ch、Yc1 和 Jb）为腐殖质型，而较低海拔的泥炭地（Dng、Jc 和 Ha）为矿质型。微量元素的分布呈随海拔降低的趋势，主要是由于局部源输入。磁性颗粒和微量元素（Cu、Ni、Pb 和 Zn）的含量及其积累速率记录了长白山地区 150 年的污染历史。新中国成立后，地球化学记录呈现出显著升高的模式，这可能标志着该地区自 20 世纪 50 年代以来人类世的开始日期。由于长白山地区大规模开垦和移民的开始，海拔较低的泥炭地（即 Dng 和 Ha）记录了最早的金属污染指纹。自 20 世纪 80 年代以来，微量元素的大量增加可能表明，由于中国改革开放后工业化和城市化的快速发展，当地环境出现了显著恶化。
