Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments

Agricultural soil as a potential source of input of heavy metals into the lacustrine sediments of Chaohu Lake via soil erosion and weathering has not been well documented. In the present study, rice soil samples along two main tributaries of Chaohu Lake were collected to determine 30 metal elements...

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Autores principales:	Ji-Zhong Wang, Fa-Zhi Xie, Dao-De Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Polish Society of Ecological Engineering (PTIE) 2022
Materias:	chaohu lake watershed metal elements agricultural soils soil Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/3c900fcf39bb4ce6996e7b6d1799bb7b
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spelling	oai:doaj.org-article:3c900fcf39bb4ce6996e7b6d1799bb7b2021-11-22T11:14:28ZElemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments2719-705010.12912/27197050/143862https://doaj.org/article/3c900fcf39bb4ce6996e7b6d1799bb7b2022-01-01T00:00:00Zhttp://www.ecoeet.com/Elemental-Metals-in-Agricultural-Soils-along-Two-Tributaries-of-Chaohu-Lake-Implication,143862,0,2.htmlhttps://doaj.org/toc/2719-7050Agricultural soil as a potential source of input of heavy metals into the lacustrine sediments of Chaohu Lake via soil erosion and weathering has not been well documented. In the present study, rice soil samples along two main tributaries of Chaohu Lake were collected to determine 30 metal elements which were compared with the data on the elements in surface sediments of Chaohu Lake to explore the impacts of soil erosion on the accumulation in the sediments. The results showed that the concentrations of most elements were less than their soil background values of Anhui Province, but Se, Sb, Sn, As, and Ba were greater than the corresponding background values. Furthermore, these elements except for Sc in the soils appeared a low variability in spatial distribution. More than 90% of agricultural soils were not expected with significant contamination by the residual elements based upon the consideration of pollution level index (PLI) combining probabilistic density function. Compared with the residual elements in the surface sediments of Chaohu Lake, most elements (Ti, Mn, Zr, Sr, Zn, Ga, Hf, U, Se, Sn, Nb, Th, V, Cd) appeared depletion in agricultural soils but enrichment in sediments. Specially for Cd, it was not detectable in all soils samples, but it existed at an extreme average content in the lacustrine sediments. These results possibly implied that elements in agricultural soils in Chaohu Lake were depleted because of soil erosion and weathering during long-term agricultural practice, resulting in enrichment in sediments of the lake. The depletion of elements in soils was predominately due to the fact that these metals existed in the soil with a large mobile fraction. While As, Th and Se moderately accumulated in the soils due to their insusceptibility of transport potentials. Because Sr and U are easier to be leached from soils than Rb and Th, respectively, a greater ratio of Rb/Sr and a lower value of U/Th was found in soil samples than in sediments. Therefore, our study implied agricultural soils could play an important role in the input of heavy metals into sediments via soil erosion and weathering.Ji-Zhong WangFa-Zhi XieDao-De ZhangPolish Society of Ecological Engineering (PTIE)articlechaohu lake watershedmetal elementsagricultural soilssoilEcologyQH540-549.5ENEcological Engineering & Environmental Technology, Vol 23, Iss 1, Pp 241-253 (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	chaohu lake watershed metal elements agricultural soils soil Ecology QH540-549.5
spellingShingle	chaohu lake watershed metal elements agricultural soils soil Ecology QH540-549.5 Ji-Zhong Wang Fa-Zhi Xie Dao-De Zhang Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments
description	Agricultural soil as a potential source of input of heavy metals into the lacustrine sediments of Chaohu Lake via soil erosion and weathering has not been well documented. In the present study, rice soil samples along two main tributaries of Chaohu Lake were collected to determine 30 metal elements which were compared with the data on the elements in surface sediments of Chaohu Lake to explore the impacts of soil erosion on the accumulation in the sediments. The results showed that the concentrations of most elements were less than their soil background values of Anhui Province, but Se, Sb, Sn, As, and Ba were greater than the corresponding background values. Furthermore, these elements except for Sc in the soils appeared a low variability in spatial distribution. More than 90% of agricultural soils were not expected with significant contamination by the residual elements based upon the consideration of pollution level index (PLI) combining probabilistic density function. Compared with the residual elements in the surface sediments of Chaohu Lake, most elements (Ti, Mn, Zr, Sr, Zn, Ga, Hf, U, Se, Sn, Nb, Th, V, Cd) appeared depletion in agricultural soils but enrichment in sediments. Specially for Cd, it was not detectable in all soils samples, but it existed at an extreme average content in the lacustrine sediments. These results possibly implied that elements in agricultural soils in Chaohu Lake were depleted because of soil erosion and weathering during long-term agricultural practice, resulting in enrichment in sediments of the lake. The depletion of elements in soils was predominately due to the fact that these metals existed in the soil with a large mobile fraction. While As, Th and Se moderately accumulated in the soils due to their insusceptibility of transport potentials. Because Sr and U are easier to be leached from soils than Rb and Th, respectively, a greater ratio of Rb/Sr and a lower value of U/Th was found in soil samples than in sediments. Therefore, our study implied agricultural soils could play an important role in the input of heavy metals into sediments via soil erosion and weathering.
format	article
author	Ji-Zhong Wang Fa-Zhi Xie Dao-De Zhang
author_facet	Ji-Zhong Wang Fa-Zhi Xie Dao-De Zhang
author_sort	Ji-Zhong Wang
title	Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments
title_short	Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments
title_full	Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments
title_fullStr	Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments
title_full_unstemmed	Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments
title_sort	elemental metals in agricultural soils along two tributaries of chaohu lake: implication on soil erosion caused enrichment in sediments
publisher	Polish Society of Ecological Engineering (PTIE)
publishDate	2022
url	https://doaj.org/article/3c900fcf39bb4ce6996e7b6d1799bb7b
work_keys_str_mv	AT jizhongwang elementalmetalsinagriculturalsoilsalongtwotributariesofchaohulakeimplicationonsoilerosioncausedenrichmentinsediments AT fazhixie elementalmetalsinagriculturalsoilsalongtwotributariesofchaohulakeimplicationonsoilerosioncausedenrichmentinsediments AT daodezhang elementalmetalsinagriculturalsoilsalongtwotributariesofchaohulakeimplicationonsoilerosioncausedenrichmentinsediments
_version_	1718417726536417280

Elemental Metals in Agricultural Soils along Two Tributaries of Chaohu Lake: Implication on Soil Erosion Caused Enrichment in Sediments

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