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Management principles for heavy metal contaminated farmland based on ecological risk-A case study in the pilot area of Hunan province, China
Xu, Xiangbo1,2; Wang, Ting3; Sun, Mingxing1,2; Bai, Yunli1,2; Fu, Chao1,2; Zhang, Linxiu1,2; Hu, Xiaoyan4; Hagist, Spencer1,2
2019-09-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume684Pages:537-547
Corresponding AuthorSun, Mingxing(sunmx@igsnrr.ac.cn) ; Hu, Xiaoyan(huxiaoyaneco@163.com)
AbstractA pilot project for farmland soil remediation was carded out in the Changsha-Zhuzhou-Xiangtan (CZX) area of Hunan province, China. However, the pilot project focused mainly on the risk of exposure to heavy metals on grain safety, and little attention was paid to the risk to ecosystem quality. The study selected three areas in counties of in the CZX, and focused on five high toxicity heavy metals-Cd (cadmium), Cr (chromium), Pb (lead), As (arsenic), Hg (mercury) to explore the potential ecological risks of the soil. Probabilistic ecological risk assessment (new method) and traditional methods were introduced to quantitatively evaluate the ecological risk Two target criteria levels (LC/EC/IC50 and NOEC/LOEC) were employed. Through constructing species sensitivity distribution (SSD) models and joint probability curves (UPC), the predicted no effect concentrations (PNECs) derived from the SSD models were 021, 1.57, 3.05, 0.86 and 0.16 mg/kg for Cd, Cr, Pb, As and Hg, respectively. Compared with the ecological risk assessment results of the traditional methods, the new method reached a different conclusion, Cr showed the highest risk, at 84.3%, which signified that there was an 84.3% probability that 5% of the species with their NOEC/LOECs exceeded in County C. Despite differences among the risk assessment approaches, all methods indicated that County C was the most contaminated. The case study signifies that traditional methods underestimated the soil ecological risk of exposure to heavy metals and there should be a strong focus on farmland ecosystem security. At the same time, this study provided a scientific basis for goal-setting in species protection and prioritizing ecosystem protection as a management principle for heavy metal contaminated farmland from the perspective of ecological risk. (C) 2019 Elsevier B.V. All rights reserved.
KeywordHeavy metals Farmland Soil Probabilistic ecological risk Ecosystem
DOI10.1016/j.scitotenv.2019.05.015
WOS KeywordPOLLUTION-CONTROL ; SOIL ; CADMIUM ; ACCUMULATION ; SEDIMENTS ; MERCURY ; WATERS ; RICE
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDA20010303] ; Personnel Scientific Research Project of New Staff of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences[Y9V90111YZ]
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences ; Personnel Scientific Research Project of New Staff of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000472024300050
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/58842
Collection中国科学院地理科学与资源研究所
Corresponding AuthorSun, Mingxing; Hu, Xiaoyan
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.United Nations Environm Programme, Int Ecosyst Management Partnership, Beijing 100101, Peoples R China
3.Shanxi Univ, Inst Loess Plateau, Taiyuan 030006, Shanxi, Peoples R China
4.Renmin Univ China, Sch Environm & Nat Resources, Beijing 100872, Peoples R China
Recommended Citation
GB/T 7714
Xu, Xiangbo,Wang, Ting,Sun, Mingxing,et al. Management principles for heavy metal contaminated farmland based on ecological risk-A case study in the pilot area of Hunan province, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,684:537-547.
APA Xu, Xiangbo.,Wang, Ting.,Sun, Mingxing.,Bai, Yunli.,Fu, Chao.,...&Hagist, Spencer.(2019).Management principles for heavy metal contaminated farmland based on ecological risk-A case study in the pilot area of Hunan province, China.SCIENCE OF THE TOTAL ENVIRONMENT,684,537-547.
MLA Xu, Xiangbo,et al."Management principles for heavy metal contaminated farmland based on ecological risk-A case study in the pilot area of Hunan province, China".SCIENCE OF THE TOTAL ENVIRONMENT 684(2019):537-547.
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