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[Spatial Variation of Heavy Metals in Soils and Its Ecological Risk Evaluation in a Typical Carya cathayensis Production Area].
Huan Jing Ke Xue. 2018 Jun 08; 39(6):2893-2903.HJ

Abstract

In recent years, the problem of soil pollution has become more and more serious. The problem of soil heavy metal pollution and its related human health risks has become a hot spot at home and abroad. Carya cathayensis is a unique high-grade woody nut and oil tree from China, and there are few reports on heavy metal pollution in Carya cathayensis plantation soils. Therefore, in order to study the spatial variability of heavy metals and the risk of pollution in Carya cathayensis soil and to promote the sustainable development of the Carya cathayensis industry, Lin'an, a typical Carya cathayensis plantation area, was selected for this study. A total of 188 soil samples were collected from the study area. We systematically studied the spatial heterogeneity of soil heavy metal content in the study area based on GIS technology, geostatistics, Moran's I, and other spatial analysis methods. The single factor pollution index method, the Nemerow comprehensive pollution index method, and the potential ecological risk assessment method were used to evaluate the heavy metal pollution in the study area. The results indicated that the mean content of soil cadmium (Cd), copper (Cu), zinc (Zn), lead (Pb), nickel (Ni), and chromium (Cr) were 0.37, 40.76, 87.61, 30.10, 28.33, 56.57 mg·kg-1, respectively. The average values of Cd and Cu were 1.33 and 2.87 times of the background values, respectively, and the average content of other heavy metals did not exceed the background values. The results of the single factor Nemerow pollution index and potential ecological risk assessment methods showed that heavy metals in the study area exceeded the soil background values in some samples, and the second grade standard of soil environmental quality was exceed for Cd, Cu, Zn, Pb, and Ni in 31.38%, 31.38%, 2.65%, 0.53%, and 17.02% of the samples, respectively. This indicated that the soils in the study area had different accumulation characteristics for Cd, Cu, Zn, Pb, Ni, and Cr, and the local soil had reached pollution levels for Cd, Cu, Zn, Pb, and Ni. Among them, Cd was the most serious, reaching the degree of strong ecological damage, followed by Cu. In general, the heavy metal contents indicated a moderate degree of ecological damage. Based on the analysis of the semi-variance function, the Cd, Cu, and Ni in the soil were best fit with exponential models, the Zn and Pb were better fit with the Gaussian model, and Cr was consistent with the spherical model. Cd, Cu, Pb, Ni, and Cr had the strong spatial autocorrelation, with Nugget/Sill ratios of 12.1%, 4.6%, 14.9%, 2.6%, and 11.2%, respectively, while the Nugget/Sill ratio of Zn was 48.8%, indicating a medium spatial autocorrelation. Moran's I and Kriging interpolation results found that the heavy metals Cd, Cu, Zn, Pb, Ni, and Cr all had obvious spatial distribution patterns and local spatial aggregation phenomena. The high values of heavy metals in soils were mainly found in Taiyang, Daoshi, Qingliangfeng, Heqiao, and Tuankou, and the probability of the risk for contamination by Cd and Cu was higher in the study area. The high values of Cd, Cu, Zn, Ni, and Cr were mainly related to mining, while Pb was closely related to the application of potassium.

Authors+Show Affiliations

State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Lin'an 311300, China. Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an 311300, China.State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Lin'an 311300, China. Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an 311300, China. Key Laboratory of Subtropical Soil and Plant Nutrition of Zhejiang Province, Zhejiang University, Hangzhou 310058, China.State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Lin'an 311300, China. Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an 311300, China.State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Lin'an 311300, China. Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an 311300, China.Forestry Science Research Institute of Hangzhou, Hangzhou 310058, China.Agriculture and Forestry Technology Extension Center in Lin'an District, Hangzhou City, Lin'an 311300, China.Agriculture and Forestry Technology Extension Center in Lin'an District, Hangzhou City, Lin'an 311300, China.

Pub Type(s)

Journal Article

Language

chi

PubMed ID

29965648

Citation

Zhang, Hong-Ju, et al. "[Spatial Variation of Heavy Metals in Soils and Its Ecological Risk Evaluation in a Typical Carya Cathayensis Production Area]." Huan Jing Ke Xue= Huanjing Kexue, vol. 39, no. 6, 2018, pp. 2893-2903.
Zhang HJ, Zhao KL, Ye ZQ, et al. [Spatial Variation of Heavy Metals in Soils and Its Ecological Risk Evaluation in a Typical Carya cathayensis Production Area]. Huan Jing Ke Xue. 2018;39(6):2893-2903.
Zhang, H. J., Zhao, K. L., Ye, Z. Q., Xu, B., Zhao, W. M., Gu, X. B., & Zhang, H. F. (2018). [Spatial Variation of Heavy Metals in Soils and Its Ecological Risk Evaluation in a Typical Carya cathayensis Production Area]. Huan Jing Ke Xue= Huanjing Kexue, 39(6), 2893-2903. https://doi.org/10.13227/j.hjkx.201707115
Zhang HJ, et al. [Spatial Variation of Heavy Metals in Soils and Its Ecological Risk Evaluation in a Typical Carya Cathayensis Production Area]. Huan Jing Ke Xue. 2018 Jun 8;39(6):2893-2903. PubMed PMID: 29965648.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Spatial Variation of Heavy Metals in Soils and Its Ecological Risk Evaluation in a Typical Carya cathayensis Production Area]. AU - Zhang,Hong-Ju, AU - Zhao,Ke-Li, AU - Ye,Zheng-Qian, AU - Xu,Bin, AU - Zhao,Wei-Ming, AU - Gu,Xiao-Bo, AU - Zhang,Hua-Feng, PY - 2018/7/3/entrez PY - 2018/7/3/pubmed PY - 2019/2/8/medline KW - Carya cathayensis stands KW - Moran's I KW - geostatistics KW - heavy metals in soils KW - pollution risk KW - spatial distribution characteristics SP - 2893 EP - 2903 JF - Huan jing ke xue= Huanjing kexue JO - Huan Jing Ke Xue VL - 39 IS - 6 N2 - In recent years, the problem of soil pollution has become more and more serious. The problem of soil heavy metal pollution and its related human health risks has become a hot spot at home and abroad. Carya cathayensis is a unique high-grade woody nut and oil tree from China, and there are few reports on heavy metal pollution in Carya cathayensis plantation soils. Therefore, in order to study the spatial variability of heavy metals and the risk of pollution in Carya cathayensis soil and to promote the sustainable development of the Carya cathayensis industry, Lin'an, a typical Carya cathayensis plantation area, was selected for this study. A total of 188 soil samples were collected from the study area. We systematically studied the spatial heterogeneity of soil heavy metal content in the study area based on GIS technology, geostatistics, Moran's I, and other spatial analysis methods. The single factor pollution index method, the Nemerow comprehensive pollution index method, and the potential ecological risk assessment method were used to evaluate the heavy metal pollution in the study area. The results indicated that the mean content of soil cadmium (Cd), copper (Cu), zinc (Zn), lead (Pb), nickel (Ni), and chromium (Cr) were 0.37, 40.76, 87.61, 30.10, 28.33, 56.57 mg·kg-1, respectively. The average values of Cd and Cu were 1.33 and 2.87 times of the background values, respectively, and the average content of other heavy metals did not exceed the background values. The results of the single factor Nemerow pollution index and potential ecological risk assessment methods showed that heavy metals in the study area exceeded the soil background values in some samples, and the second grade standard of soil environmental quality was exceed for Cd, Cu, Zn, Pb, and Ni in 31.38%, 31.38%, 2.65%, 0.53%, and 17.02% of the samples, respectively. This indicated that the soils in the study area had different accumulation characteristics for Cd, Cu, Zn, Pb, Ni, and Cr, and the local soil had reached pollution levels for Cd, Cu, Zn, Pb, and Ni. Among them, Cd was the most serious, reaching the degree of strong ecological damage, followed by Cu. In general, the heavy metal contents indicated a moderate degree of ecological damage. Based on the analysis of the semi-variance function, the Cd, Cu, and Ni in the soil were best fit with exponential models, the Zn and Pb were better fit with the Gaussian model, and Cr was consistent with the spherical model. Cd, Cu, Pb, Ni, and Cr had the strong spatial autocorrelation, with Nugget/Sill ratios of 12.1%, 4.6%, 14.9%, 2.6%, and 11.2%, respectively, while the Nugget/Sill ratio of Zn was 48.8%, indicating a medium spatial autocorrelation. Moran's I and Kriging interpolation results found that the heavy metals Cd, Cu, Zn, Pb, Ni, and Cr all had obvious spatial distribution patterns and local spatial aggregation phenomena. The high values of heavy metals in soils were mainly found in Taiyang, Daoshi, Qingliangfeng, Heqiao, and Tuankou, and the probability of the risk for contamination by Cd and Cu was higher in the study area. The high values of Cd, Cu, Zn, Ni, and Cr were mainly related to mining, while Pb was closely related to the application of potassium. SN - 0250-3301 UR - https://www.unboundmedicine.com/medline/citation/29965648/[Spatial_Variation_of_Heavy_Metals_in_Soils_and_Its_Ecological_Risk_Evaluation_in_a_Typical_Carya_cathayensis_Production_Area]_ L2 - https://antibodies.cancer.gov/detail/CPTC-CTLA4-1 DB - PRIME DP - Unbound Medicine ER -