DISTRIBUTION CHARACTERISTICS AND POTENTIAL RISK OF HEAVY METALS IN WETLAND FRESHWATER RESTORATION AREA OF THE YELLOW RIVER DELTA

CHEN Xuejuan; GAO Fang; WANG Qing; PANG Bo; XIE Yiliang; CUI Baoshan; YUE Xiupeng; SONG Jianbin

doi:10.13205/j.hjgc.202301028

Volume 41 Issue 1

Jan. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(1): 232-239

CHEN Xuejuan, GAO Fang, WANG Qing, PANG Bo, XIE Yiliang, CUI Baoshan, YUE Xiupeng, SONG Jianbin. DISTRIBUTION CHARACTERISTICS AND POTENTIAL RISK OF HEAVY METALS IN WETLAND FRESHWATER RESTORATION AREA OF THE YELLOW RIVER DELTA[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 232-239. doi: 10.13205/j.hjgc.202301028

Citation:

CHEN Xuejuan, GAO Fang, WANG Qing, PANG Bo, XIE Yiliang, CUI Baoshan, YUE Xiupeng, SONG Jianbin. DISTRIBUTION CHARACTERISTICS AND POTENTIAL RISK OF HEAVY METALS IN WETLAND FRESHWATER RESTORATION AREA OF THE YELLOW RIVER DELTA[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 232-239. doi: 10.13205/j.hjgc.202301028

Citation:

CHEN Xuejuan, GAO Fang, WANG Qing, PANG Bo, XIE Yiliang, CUI Baoshan, YUE Xiupeng, SONG Jianbin. DISTRIBUTION CHARACTERISTICS AND POTENTIAL RISK OF HEAVY METALS IN WETLAND FRESHWATER RESTORATION AREA OF THE YELLOW RIVER DELTA[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 232-239. doi: 10.13205/j.hjgc.202301028

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DISTRIBUTION CHARACTERISTICS AND POTENTIAL RISK OF HEAVY METALS IN WETLAND FRESHWATER RESTORATION AREA OF THE YELLOW RIVER DELTA

doi: 10.13205/j.hjgc.202301028

1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;
2. Shandong Yellow River Delta National Nature Reserve Administration Committee, Dongying 257091, China

Received Date: 2022-07-05
Available Online: 2023-03-23

Abstract

Abstract

To evaluate the ecological restoration effect of heavy metals in the wetland freshwater restoration project of the Yellow River Delta National Nature Reserve, the heavy metals (As, Cd, Cr, Cu, Pb and Hg) in the surface sediments of the study area were monitored, and the spatial distribution characteristics, ecological risks and potential sources were analyzed. The results showed that the average contents of As, Cd, Cr, Cu and Pb in surface sediments of the restored area were 10.22, 0.17, 40.78, 17.75, 18.12 mg/kg, and Hg was not detected. The RI value of heavy metals in the restored area was lower than 60, indicating low ecological risk; and the E_r value of Cd was mainly between 30 and 60, which was the main potential ecological risk factor. The potential risk of each type of restored wetland habitat varied significantly, with the lowest risk in the southern cassis and the highest in the northern ecological island. Compared with the unrestored area, the spatial variability and aggregation effect of heavy metal content in the restoration area was reduced, and the environmental risk was significantly lower, indicating that after the implementation of the restoration project, the improvement of wetland hydrological function would help reduce the ecological risks of heavy metals. In addition, As, Cd, Cr, Cu, and Pb were highly homologous in the sediments, and their potential sources were mainly pollutants discharged from oilfield exploitation and industrial and agricultural activities. The study results could provide a scientific basis for ecological restoration and heavy metal risk prevention and control in the Yellow River Delta.
- Yellow River Delta,
- freshwater restoration area,
- surface sediments,
- distribution of heavy metals,
- ecological risk

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