鸭绿江口与中上游重金属沉积记录对比研究

打开文本图片集

中图分类号：P512.2；X52；P7 文献标志码：A 文章编号：1005—9857（2025）08—0094—15

Comparative Study on Sedimentary Records of the Heavy Metals in theEstuary and theUp and MiddleReachesof the Yalu River

LIU Yue¹，LI Fuxiang1，CHENG Yan'， ZHANG Chunpeng'，SUN Yufeng²，LI Hongjun³，LI Ying

（1.Schoolof Science，Liaodong University，Dandong 1180o3，China;2.Dandong NaturalResources Affairs Service Center，Natural Resources Conservation and Inspection Service Department，Dandong 118oo2，China; 3.School ofCivil Engineering，Liaodong University，Dandong l18oo3，China; 4.School ofLand and Environment，Shenyang Agricultural University，Shenyang110866，China）

Abstract：Throughcomparativeresearch，thesedimentaryconnectionof heavy metals betweentheYalu River estuary andits middleandupperreaches has been established，laying afoundation for ecologicalrestorationand environmental assessment throughout the basin.We compared the vertical distribution，anthropogenic deposition flux，R-type clustering characteristics，and geoaccumulation index of heavy metal deposition recorded in A4 column samples from theYalu River estuary with the published data from S1column samples in the middle and upper reaches.The findings revealed that despite numerous synchronous changed in the economic development of the entire Yalu River basin，the processesofheavy metal deposition were not entirely uniform.The heavy metals in the estuary did not solely dependon the runof transport，indicating thatthe heavy metaldeposition intheYalu River estuarysince 2000 has been characterized by near-source deposition. The six heavy metals，namely Pb ，Ni，Cu，As，Cd，and Hg， primarily originated from the natural and agricultural sources，influenced by lithological differences. Cr exhibited a mixed source，sensitive to human activity intensity and adjustments in environmental policies. Zn ，theanthropogenic source，responds directlyand clearly to changes in human activity intensityand environmental policyadjustments.The geoaccumulation index for Hg ，Cd，and Zn in the Yalu River estuary was only between 0～1 ，indicating a slight level of pollution that was generallmanageable.However，Zn，predominantly sourced from humanactivities，had shown arebound trend since2 Ooo，warranting attention.

Keywords：YaluRiverestuary，Heavymetals，Sedimentaryrecord

0 引言

重金属是水体环境中最主要的污染物之一，不仅具有蓄积快、残留时间长、难以恢复，并易于沿食物链富集等特征，而且来源广泛，对水生生物和人体健康都有较大的负面影响，并严重损害人体健康[1]。（剩余21516字）