RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2023, Vol. 32 >> Issue (12): 2638-2648.doi: 10.11870/cjlyzyyhj202312015

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Heavy Metal Pollution Sources and Risk Evaluation of Goose Eggs in Mercury Mining Area

GUO Xiao-ling1, LI Xue1, WANG Zhong-wei2, WANG Zhu-hong1   

  1. (1. School of Public Health, Guizhou Medical University, Guiyang 550025, China; 2. Ecological Environment Monitoring Center, Guangdong,Guangzhou 510220,China)
  • Online:2023-12-20 Published:2023-12-25

Abstract: Except mercury (Hg) pollution, Hg mining areas were often characterized with other heavy metal pollutions. To better understand heavy metal pollution level in goose eggs from the Hg mining area, 10 local goose eggs were purchased from Wuchuan in Guizhou (the Hg mining area) and Anshun in Guizhou (the background area). The concentrations of Cr, Ni, Cu, Zn, Sr, Mo, Ba and Pb in the egg whites and yolks were determined, followed by the evaluation of ecological and environmental risks of goose egg heavy metals, and the sources of heavy metals in goose eggs were finally analyzed. The results showed that:for Wuchuan eggs, the concentrations of Cr, Ni, Cu, Zn, Sr, Mo, Ba and Pb were 0.50, 0.15, 4.20, 36.61, 11.29, 0.22, 19.60 and 0.040 μg/g, respectively in egg whites; The concentrations of Cr, Ni, Cu, Zn, Sr, Mo, Ba and Pb in egg yolks were 0.42, 0.07, 3.04, 53.60, 5.36, 0.37, 72.92 and 0.27 μg/g. In Anshun eggs, Cr, Ni, Cu, Zn, Sr, Mo, Ba and Pb concentrations of egg whites were 0.27, 0.04, 3.93, 0.38, 1.31, 0.11, 0.09 and 0.008 μg/g, and were 0.20, 0.06, 1.65, 39.67, 2.77, 0.28, 3.98 and 0.04 μg/g, respectively in egg yolks. Unlike Anshun area, the concentrations of Ni, Zn, Ba, Sr and Pb in the egg whites and Zn, Ba, Sr and Pb in the yolks from Wuchuan were significantly higher(P<0.05), indicating that goose eggs from the mining area were significantly contaminated with heavy metals. Moreover, the potential health risk of heavy metals from goose eggs was higher for children than for adults, and egg yolks were higher than from egg whites.Factor analysis illustrated that Hg, Zn, Ba, and Pb were mainly from crops; Ni, Cu and Sr were mainly from contaminated water bodies and aquatic plants. Local residents could be at health risks from long-term consumption of contaminated goose eggs. It was highly suggested that local residentsincrease their awareness of heavy metal pollutions and reduce their consumption of local goose eggs.

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