Contamination features and ecological risks of heavy metals in the farmland along shoreline of Caohai plateau wetland, China

Sun, Rongguo; Yang, Jie; Xia, Pinhua; Wu, Shengli; Lin, Tao; Yi, Yin

doi:10.1016/j.chemosphere.2020.126828

Cited by 65 publications

(23 citation statements)

References 37 publications

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“…As Lishui is the main area of agricultural products supply for the Nanjing metropolitan, grain, vegetables, fruits, and other industrial crops are widely planted in Lishui, and the facilities for agriculture are widely distributed as well. Fertilizers and pesticides might continuously increase heavy metal ecological risks [31]. It has been demonstrated that higher Cd and Zn ecological risk on drylands could arise from continuous agriculture [32].…”

Section: Potential Sources Of the Heavy Metals Ecological Risksmentioning

confidence: 99%

Potential Ecological Risks of Heavy Metals in Agricultural Soil Alongside Highways and Their Relationship with Landscape

Wen

et al. 2021

Agriculture

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The agricultural soil alongside highways has experienced multiple potential ecological risks from human activities. In this study, 100 soil samples near the highways were collected in Lishui District, Nanjing City. Using the single-factor pollution index, the Nemerow comprehensive pollution index, and the potential ecological risk index, the study investigated the heavy metal contents and distribution in roadside agricultural soil. PCA and a multiple regression model were applied to quantitatively analyze the spatial relationships between sampling soil heavy metal accumulation and the surrounding man-made landscape. The mean contents of Cu and Pb exceeded the background, while Cd, Cr, and Zn were lower than that. The potential ecological risk index exhibited a very low ecological hazard and only Cr in soils rarely showed moderate risk. Furthermore, quantitative analysis for the sources of contamination revealed that agricultural practices were the dominant contributors to the heavy metals, including Cd, Cu, and Zn, while road and heavy industrial practices contributed to Cr and Pb. The study provides sources of heavy metal pollution from human activities in roadside agricultural land and serves as a reference for ecological restoration.

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Section: Potential Sources Of the Heavy Metals Ecological Risksmentioning

confidence: 99%

Potential Ecological Risks of Heavy Metals in Agricultural Soil Alongside Highways and Their Relationship with Landscape

Wen

et al. 2021

Agriculture

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“…e preparation, digestion, and determination of sediment samples have been described in our previous work [5]. Simply, the sediment samples were dried freeze, dislodged the stones, debris, and organisms, and ground to 200-mesh.…”

Section: Chemical Analyses and Data Analysismentioning

confidence: 99%

“…en these acids were volatilized at 160°C until solidified material became light yellow or white. e solidified material was dissolved with HNO 3 and diluted with ultrapure water for determination [5]. Flame atomic absorption spectrometry (Perkin Elmer AAnalyst 800, USA) was employed for determining Pb, Cu, Zn, and Mn, graphite furnace atomic absorption spectrometry was used for measuring Cd, and cold atomic fluorescence spectrometry (Model III, Brooks Rand, USA) was employed for determining As and Hg, in prepared solution [5].…”

Section: Chemical Analyses and Data Analysismentioning

confidence: 99%

“…HMs pollution in water systems has caused wide concerns throughout the world, especially in developing countries where the economic activities are extensive [3]. Sediments are an important sink in aquatic ecosystems for HMs emitted from anthropogenic sources and will directly affect the overlying water and aquatic organisms [4,5]. e concentrations of HMs in sediments can reflect the quality of the water column to some extent [6].…”

Section: Introductionmentioning

confidence: 99%

“…e selection of evaluation methods should consider their emphasis and the research purpose [13]. In general, multiple evaluation methods were conducted to obtain comprehensive results [5,14]. e contents of HMs in the sediments around the areas with extensive economic activities mainly depend on anthropogenic activities such as rapid industrialization, mining, and smelting mineral resources, nonjudicial use of agrochemical, urbanization, agricultural production, etc.…”

Section: Introductionmentioning

confidence: 99%

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Contamination Features and Source Apportionment of Heavy Metals in the River Sediments around a Lead-Zinc Mine: A Case Study in Danzhai, Guizhou, China

Sun

Gao

Jing

et al. 2021

Journal of Chemistry

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The spatial patterns, ecological risks, and sources of heavy metals (HMs), including Pb, Zn, Mn, Cu, Cd, Hg, and As in river sediments, were identified around a lead-zinc mine of Danzhai, Guizhou, China. The concentrations of selected HMs and their coefficient variations indicated that the river sediments around this typical lead-zinc mine were obviously contaminated with HMs. Anthropogenic activities had further enhanced the accumulation of HMs. The higher contents of the most common selected HMs were mainly distributed in the area close to the lead-zinc mine. Based on the combined evaluations of the single factor pollution index, geo-accumulation index, and potential ecological risk index, it indicated that the ecological risks of Hg, Cd, Zn, and Pb were high or extremely high, and of Mn, Cu, and As were slight or none in the sediments around this lead-zinc mine. It was found that lead-zinc mining and smelting activities, coal mining activities, and agricultural activities (livestock and poultry breeding) are the primary sources of selected HMs, based on the results of correlation analysis together with principal component analysis (PCA) and positive matrix factorization (PMF) model. The pollution of HMs in the river sediments around a lead-zinc mine was predominantly caused by lead-zinc mining and smelting activities. Therefore, for environmental persistence, lead-zinc mining and smelting activities should be given careful consideration and under close surveillance.

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Shifts of sediment bacterial community and respiration along a successional gradient in a typical karst plateau lake wetland (China)

et al. 2020

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Contamination features and ecological risks of heavy metals in the farmland along shoreline of Caohai plateau wetland, China

Cited by 65 publications

References 37 publications

Potential Ecological Risks of Heavy Metals in Agricultural Soil Alongside Highways and Their Relationship with Landscape

Potential Ecological Risks of Heavy Metals in Agricultural Soil Alongside Highways and Their Relationship with Landscape

Contamination Features and Source Apportionment of Heavy Metals in the River Sediments around a Lead-Zinc Mine: A Case Study in Danzhai, Guizhou, China

Shifts of sediment bacterial community and respiration along a successional gradient in a typical karst plateau lake wetland (China)

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