Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China

With the rapid industrialization and urbanization, more attention is turning to heavy metal contamination in the soil environment. To assess the potential environmental risk on soil, a comprehensive geochemistry study on heavy metal was performed in Laizhou, eastern China, using 3834 surface soil sa...

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Autores principales:	Zhigang Zhao, Haishui Jiang, Linghao Kong, Tianyi Shen, Xionghua Zhang, Songsong Gu, Xiangcai Han, Yachao Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	heavy metal soil spatial distribution contamination assessment Laizhou Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/985e71128c754e4c995d320f4e0d5ca3
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spelling	oai:doaj.org-article:985e71128c754e4c995d320f4e0d5ca32021-11-11T19:52:10ZAssessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China10.3390/w132129402073-4441https://doaj.org/article/985e71128c754e4c995d320f4e0d5ca32021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/2940https://doaj.org/toc/2073-4441With the rapid industrialization and urbanization, more attention is turning to heavy metal contamination in the soil environment. To assess the potential environmental risk on soil, a comprehensive geochemistry study on heavy metal was performed in Laizhou, eastern China, using 3834 surface soil samples (0–20 cm, regular grid of 1 × 1 km<sup>2</sup>) and 60 layered soil samples (0–200 cm) were analyzed. The average concentrations of As, Cd, Cr, Cu, Hg, Ni, Zn and Pb were 7.60 mg·kg<sup>−1</sup>, 0.15 mg·kg<sup>−1</sup>, 45.50 mg·kg<sup>−1</sup>, 19.10 mg·kg<sup>−1</sup>, 44.00μg·kg<sup>−1</sup>, 18.70 mg·kg<sup>−1</sup>, 51.40 mg·kg<sup>−1</sup> and 29.00 mg·kg<sup>−1</sup>, which were lower than the threshold levels of the Grade II criteria of China national environment quality standard for soil, but the contents of As, Cd, Hg, and Pb were higher than background values of eastern Shandong Province surface soil. Fractionation analysis showed that the potential bioavailability in surface soils decreases in the order of Cd > As > Cu > Ni > Zn > Cr > Pb > Hg. Soil assessments with enrichment factor, contamination factor, Nemerow composite index, geo-accumulation index and potential ecological risk index, indicate the soil in Laizhou is contaminated strongly with As, Cd and Hg and a moderately Cr, Ni, Cu and Zn. The level of Pb pollution is between moderate to high. Multivariate analyses suggest that Cr and Ni were derived mainly from natural sources, and As, Cd, Pb, while Hg mostly came from anthropogenic sources. Cu and Zn were from a mixture of anthropogenic and natural sources. Our results demonstrate that more attention should be paid to monitoring soil quality in the heavily polluted site.Zhigang ZhaoHaishui JiangLinghao KongTianyi ShenXionghua ZhangSongsong GuXiangcai HanYachao LiMDPI AGarticleheavy metalsoilspatial distributioncontamination assessmentLaizhouHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 2940, p 2940 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heavy metal soil spatial distribution contamination assessment Laizhou Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	heavy metal soil spatial distribution contamination assessment Laizhou Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Zhigang Zhao Haishui Jiang Linghao Kong Tianyi Shen Xionghua Zhang Songsong Gu Xiangcai Han Yachao Li Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China
description	With the rapid industrialization and urbanization, more attention is turning to heavy metal contamination in the soil environment. To assess the potential environmental risk on soil, a comprehensive geochemistry study on heavy metal was performed in Laizhou, eastern China, using 3834 surface soil samples (0–20 cm, regular grid of 1 × 1 km<sup>2</sup>) and 60 layered soil samples (0–200 cm) were analyzed. The average concentrations of As, Cd, Cr, Cu, Hg, Ni, Zn and Pb were 7.60 mg·kg<sup>−1</sup>, 0.15 mg·kg<sup>−1</sup>, 45.50 mg·kg<sup>−1</sup>, 19.10 mg·kg<sup>−1</sup>, 44.00μg·kg<sup>−1</sup>, 18.70 mg·kg<sup>−1</sup>, 51.40 mg·kg<sup>−1</sup> and 29.00 mg·kg<sup>−1</sup>, which were lower than the threshold levels of the Grade II criteria of China national environment quality standard for soil, but the contents of As, Cd, Hg, and Pb were higher than background values of eastern Shandong Province surface soil. Fractionation analysis showed that the potential bioavailability in surface soils decreases in the order of Cd > As > Cu > Ni > Zn > Cr > Pb > Hg. Soil assessments with enrichment factor, contamination factor, Nemerow composite index, geo-accumulation index and potential ecological risk index, indicate the soil in Laizhou is contaminated strongly with As, Cd and Hg and a moderately Cr, Ni, Cu and Zn. The level of Pb pollution is between moderate to high. Multivariate analyses suggest that Cr and Ni were derived mainly from natural sources, and As, Cd, Pb, while Hg mostly came from anthropogenic sources. Cu and Zn were from a mixture of anthropogenic and natural sources. Our results demonstrate that more attention should be paid to monitoring soil quality in the heavily polluted site.
format	article
author	Zhigang Zhao Haishui Jiang Linghao Kong Tianyi Shen Xionghua Zhang Songsong Gu Xiangcai Han Yachao Li
author_facet	Zhigang Zhao Haishui Jiang Linghao Kong Tianyi Shen Xionghua Zhang Songsong Gu Xiangcai Han Yachao Li
author_sort	Zhigang Zhao
title	Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China
title_short	Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China
title_full	Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China
title_fullStr	Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China
title_full_unstemmed	Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China
title_sort	assessment of potential ecological risk of heavy metals in surface soils of laizhou, eastern china
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/985e71128c754e4c995d320f4e0d5ca3
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Assessment of Potential Ecological Risk of Heavy Metals in Surface Soils of Laizhou, Eastern China

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