Concentration and Fractionation of Heavy Metalsin the Old Yellow River Estuary, China
Liu,HQ(Liu,Houqi)[1,2]; Liu,GJ(Liu,Guijian)[2]; Da,CN(Da,Chunnian)[1]; Yuan,ZJ(Yuan,Zijiao)[1]; Wang,J(Wang,Jie)[1]
2015-01-08
发表期刊Journal of Environmental Quality
卷号44期号:2015页码:174-182
文章类型期刊论文
摘要

A sequential extraction procedure was applied to determine the concentration and fractionation characteristics of eight heavy metals (HMs) (Cu, Zn, Pb, Cd, Cr, Fe, Mn, and Ni) in a sediment core collected from the old Yellow River Estuary, China. The results revealed that the mean deposition rate of this sediment core, which spanned 87 yr (1925–2012), was approximately 0.5 cm yr−1. The mean concentrations and ranges of HMs were Cu: 26.9 (18.3–38.5), Zn: 76.4 (51.0–107), Pb: 37.3 (17.8–53.8), Cd: 0.23 (0.20–0.27), Cr: 84.7 (45.5–116), Fe: 24,000 (16,500–31,700), Mn: 709 (388–1020), and Ni: 36.1 (24.8–47.2) mg kg-1 (dry weight). Six HMs (Cu, Zn, Cr, Cd, Fe, and Ni) were present in their highest proportion in the residual fraction; their lowest proportion was observed in the exchangeable fraction. Lead primarily existed in the oxidizable or residual fraction. Manganese was mainly presented in the exchangeable fraction. The risk assessment code results revealed that the sediments displayed a low risk for Cu, Zn, Pb, Cr, Cd, Fe, Mn, and Ni. The HMs Cu, Zn, Cr, Cd, Mn, and Ni displayed minor enrichment in the sediment core, whereas for Pb, moderate contamination enrichment was observed. Overall, an increase in I geo and total concentration of HMs occurred since 1925 and reached a maximum value around 1980, after which there was a larger fluctuation or decline until 2012. We also found that the degree of HM pollution during the 1976–1996 period was less serious than before 1976. All the sediment samples exceeded the effect range low (ERL) for Ni, whereas 56.1, 7.32, and 17.1% exceeded the ERL values for Cr, Cu, and Pb; no samples exceeded the ERL for Zn or Cd.

DOI10.2134/jeq2014.04.0180
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9450
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.CAS Key Lab. of Crust-Mantle Materialsand the Environments, School of Earth and Space Sciences, Univ. of Science andTechnology of China, Hefei 230026, China;
2.State Key Lab. of Loessand Quaternary Geology, Institute of Earth Environment, The Chinese Academy ofSciences, Xi’an 710075, Shaanxi, China
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GB/T 7714
Liu,HQ,Liu,GJ,Da,CN,et al. Concentration and Fractionation of Heavy Metalsin the Old Yellow River Estuary, China[J]. Journal of Environmental Quality,2015,44(2015):174-182.
APA Liu,HQ,Liu,GJ,Da,CN,Yuan,ZJ,&Wang,J.(2015).Concentration and Fractionation of Heavy Metalsin the Old Yellow River Estuary, China.Journal of Environmental Quality,44(2015),174-182.
MLA Liu,HQ,et al."Concentration and Fractionation of Heavy Metalsin the Old Yellow River Estuary, China".Journal of Environmental Quality 44.2015(2015):174-182.
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