Citation: LIU Hui-Jia, XU Jian-Ling, MA Wen, MA Liang, WANG Han-Xi, PAN Qian-Bo, HE Qian-Qian, LUO Yi-Ou, CHEN Chao-Huang. Assessment of Pollution Level and Ecological Risk of Heavy Metals in Different Succession Stages of Peat Bog Wetland Soil[J]. Chinese Journal of Analytical Chemistry, ;2021, 49(5): 839-846. doi: 10.19756/j.issn.0253-3820.211035 shu

Assessment of Pollution Level and Ecological Risk of Heavy Metals in Different Succession Stages of Peat Bog Wetland Soil

LIU Hui-Jia ¹ ,
XU Jian-Ling ^1,2,, ,
MA Wen ¹ ,
MA Liang ¹ ,
WANG Han-Xi ^1,, ,
PAN Qian-Bo ¹ ,
HE Qian-Qian ¹ ,
LUO Yi-Ou ¹ ,
CHEN Chao-Huang ¹

1.
State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China;
2.
Key Laboratory of Vegetation Ecology of Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun 130024, China

Corresponding author: XU Jian-Ling, WANG Han-Xi,
Received Date: 15 January 2021
Revised Date: 24 March 2021

Fund Project: Supported by the Jilin Provincial Science and Technology Department (Nos. 20180101092JC, 20190303084SF), and the Ecology and Environment Department of Jilin Province, China (No. 2020-05).

The heavy metal pollution of peat bog wetland in different succession stages is different, and the determination and evaluation of heavy metals in soil are conducive to the management and protection of natural wetland. In this work, inductively coupled plasma mass spectrometer, inductively coupled plasmon emission spectrometer and atomic fluorescence spectrometry were used to determine the ten heavy metals (Cu, Zn, Pb, Ni, Cr, Mn, As, Se, Cd and Hg) in the soil of three typical peat bog wetlands (Gushantun Wetland, Jinchuan Wetland and Hanlongwan Wetland) with different succession stages in the Longwan Nature Reserve of Tonghua City, Jilin Province, China. The geo-accumulation index and potential ecological risk index were used to evaluate the heavy metal pollution in wetland, and the source of heavy metals was explored through correlation analysis and principal component analysis. The results showed that the contents of Cu, Hg, Ni, Cr, Mn and As in the soil of Jinchuan Wetland with the longer succession time were the highest. The contents of Zn, Pb, Cd and Se in the soil of Hanlongwan Wetland with the shortest succession time were the highest. The average contents of Cd and Hg in the three wetland soils exceeded the environmental background value. The Cd and Hg had the highest contributions to ecological risk of wetland soil, and the contribution rate could reach more than 90%. Among them, the pollution level of Cd in Hanlongwan Wetland was the highest, which was moderately to strongly polluted. The Hg had the highest pollution level in the Jinchuan Wetland, which was unpolluted to moderately polluted. The potential ecological risk level of the Hanlongwan Wetland was the highest. The sources of Zn, Pb, Cd and Hg were different from Cu and Mn, which might be affected by the factors such as agricultural irrigation, domestic sewage discharge, transportation, natural settlement, etc.
- Inductively coupled plasma mass spectrometer,
- Inductively coupled plasma emission spectrometry,
- Peat bog,
- Wetland,
- Heavy metal
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