Potentially Toxic Element Pollution Levels and Risk Assessment of Soils and Sediments in the Upstream River, Miyun Reservoir, China

Pan, Libo; Guang-ling, Fang; Wang, Yue; Wang, Lei; Su, Benying; Li, Dan; Bao, Xiang

doi:10.3390/ijerph15112364

Cited by 41 publications

(12 citation statements)

References 41 publications

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“…PTEs cause adverse ecological effects on plants and organisms such as impacting their activity, growth rate/yield, metabolism and reproduction, causing symptoms of physiological stress and potentially death. The extent of the adverse effect depends on the exposure route (ingestion, dermal absorption or uptake of pore water) and time, resistance (related to residence time of the PTEs in the environment) and detoxification mechanisms of the plant or animal (Alloway, 2013;Eggleton and Thomas, 2004;Ehlers and Loibner, 2006;Hooda, 2010;Pan et al, 2018;Shahid et al, 2017;Winger et al, 1998). Leaching of PTEs from the floodplain soil into the groundwater or river will also cause adverse effects to aquatic organism in these environments (Zia et al, 2018).…”

Section: Ptes In Floodplain Soilmentioning

confidence: 99%

The impact of increased flooding occurrence on the mobility of potentially toxic elements in floodplain soil – A review

Ponting

Kelly

Verhoef

et al. 2021

Science of The Total Environment

110

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The frequency and duration of flooding events are increasing due to land-use changes increasing runoff of precipitation, and climate change causing more intense rainfall events. Floodplain soils situated downstream of urban or industrial catchments, which were traditionally considered a sink of potentially toxic elements (PTEs) arriving from the river reach, may now become a source of legacy pollution to the surrounding environment if PTEs are mobilised by unprecedented flooding events.When a soil floods, the mobility of PTEs can increase or decrease due to the net effect of five key processes; (i) the soil redox potential decreases which can directly alter the speciation, and hence mobility, of redox sensitive PTEs (e.g. Cr, As), (ii) pH increases which usually decreases the mobility of metal cations (e.g. Cd 2+ , Cu 2+ , Ni 2+ , Pb 2+ , Zn 2+ ), (iii) dissolved organic matter (DOM) increases, which chelates and mobilises PTEs, (iv) Fe and Mn hydroxides undergo reductive dissolution, releasing adsorbed and co-precipitated PTEs, and (v) sulphate is reduced and PTEs are immobilised due to precipitation of metal sulphides. These factors may be independent mechanisms, but they interact with one another to affect the mobility of PTEs, meaning the effect of flooding on PTE mobility is not easy to predict. Many of the processes involved in mobilising PTEs are microbially mediated, temperature dependent and the kinetics are poorly understood.Soil mineralogy and texture are properties that change spatially and will affect how the mobility of PTEs in a specific soil may be impacted by flooding. As a result, knowledge based on one river catchment may not be particularly useful for predicting the impacts of flooding at another site. This review provides a critical discussion of the mechanisms controlling the mobility of PTEs in floodplain soils. It summarises current understanding, identifies limitations to existing knowledge, and highlights requirements for further research.

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Section: Ptes In Floodplain Soilmentioning

confidence: 99%

The impact of increased flooding occurrence on the mobility of potentially toxic elements in floodplain soil – A review

Ponting

Kelly

Verhoef

et al. 2021

Science of The Total Environment

110

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“…It confirmed that mining activity was the major source of Pb pollution in soils. This phenomenon is mainly due to the considerable contribution of long-term frequent mining activities, ore mining and smelting, and abundant small-scale mines distributed in the upper area of the Miyun Reservoir; therefore, most soil Pb likely represents locally emitted Pb [27,30,33,62]. In contrast, natural background sources are an important source of Pb in sediments.…”

Section: Pb Isotope Ratios and Source Apportionmentmentioning

confidence: 99%

Potentially Toxic Element Contaminations and Lead Isotopic Fingerprinting in Soils and Sediments from a Historical Gold Mining Site

Tang

Zhang

et al. 2021

IJERPH

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Lead (Pb) isotopes have been widely used to identify and quantify Pb contamination in the environment. Here, the Pb isotopes, as well as the current contamination levels of Cu, Pb, Zn, Cr, Ni, Cd, As, and Hg, were investigated in soil and sediment from the historical gold mining area upstream of Miyun Reservoir, Beijing, China. The sediment had higher 206Pb/207Pb ratios (1.137 ± 0.0111) than unpolluted soil did (1.167 ± 0.0029), while the soil samples inside the mining area were much more variable (1.121 ± 0.0175). The mean concentrations (soil/sediment in mg·kg−1) of Pb (2470/42.5), Zn (181/113), Cu (199/36.7), Cr (117/68.8), Ni (40.4/28.9), Cd (0.791/0.336), As (8.52/5.10), and Hg (0.168/0.000343) characterized the soil/sediment of the studied area with mean Igeo values of the potentially toxic element (PTE) ranging from −4.71 to 9.59 for soil and from −3.39 to 2.43 for sediment. Meanwhile, principal component analysis (PCA) and hierarchical cluster analysis (HCA) coupled with Pearson’s correlation coefficient among PTEs indicated that the major source of the Cu, Zn, Pb, and Cd contamination was likely the mining activities. Evidence from Pb isotopic fingerprinting and a binary mixing model further confirmed that Pb contamination in soil and sediment came from mixed sources that are dominated by mining activity. These results highlight the persistence of PTE contamination in the historical mining site and the usefulness of Pb isotopes combined with multivariate statistical analysis to quantify contamination from mining activities.

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“…Potentially toxic elements (PTEs), including trace elements and heavy metals, are naturally occurring substances in the environment; however, the anthropogenic activities in some regions have increased their concentration [1,2]. Due to their bioaccumulation capacity, persistent nature, and toxicity, some PTEs are considered priority pollutants [3].…”

Section: Introductionmentioning

confidence: 99%

Human Health Risk Assessment for Exposure to Potentially Toxic Elements in Polluted Rivers in the Ecuadorian Amazon

Jiménez-Oyola

Escobar-Segovia

García-Martínez

et al. 2021

Water

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Anthropogenic activities performed in the Ecuadorian Amazon have released potentially toxic elements (PTEs) into the rivers, causing severe environmental pollution and increasing the risk of exposure to the residents of the surrounding areas. This study aims to carry out a human health risk assessment using deterministic and probabilistic methods to estimate the hazard index (HI) and total cancer risk (TCR) related to multi-pathway human exposure to PTEs in polluted rivers. Concentrations of Al, Cd, Cr, Cu, Hg, Ni, Pb, and Zn in surface water and sediment samples from rivers on the Ecuadorian Amazon were considered to assess the potential adverse human health effects. As a result, deterministic and probabilistic estimations of cancer and non-cancer risk through exposure to surface waters and sediments were above the safety limit. A sensitivity analysis identified the concentration of PTEs and the exposure duration (ED) as the two most important variables for probabilistic health risk assessment. The highest risk for receptors was related to exposure to polluted sediments through incidental ingestion and dermal contact routes. According to the deterministic estimation, the human health risk through ingestion of water was above the threshold in specific locations. This study reveals the potential health risk to which the population is exposed. This information can be used as a baseline to develop public strategies to reduce anthropogenic pollution and exposure to PTEs in Ecuadorian Amazon rivers.

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Potentially Toxic Element Pollution Levels and Risk Assessment of Soils and Sediments in the Upstream River, Miyun Reservoir, China

Cited by 41 publications

References 41 publications

The impact of increased flooding occurrence on the mobility of potentially toxic elements in floodplain soil – A review

The impact of increased flooding occurrence on the mobility of potentially toxic elements in floodplain soil – A review

Potentially Toxic Element Contaminations and Lead Isotopic Fingerprinting in Soils and Sediments from a Historical Gold Mining Site

Human Health Risk Assessment for Exposure to Potentially Toxic Elements in Polluted Rivers in the Ecuadorian Amazon

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