Identifying sources and hazardous risks of heavy metals in topsoils of rapidly urbanizing East China

Yang, Liu; Ma, Zongwei; Lv, Jianshu; Bi, Jun

doi:10.1007/s11442-016-1296-x

Cited by 43 publications

(21 citation statements)

References 39 publications

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“…Heavy metals emitted from automobile exhausts and those present in vehicle tires are also deposited in farmland, driven by climatic factors such as rainfall, further affecting the accumulation of Cd and Hg. In line with this, our results are similar to a previous study (Liu et al, 2016;Turkyilmaz et al, 2018), whereby distance from a road was considered one of the most important factors influencing the potential ecological risks of Cd and Hg in farmland soil.…”

Section: Discussionsupporting

confidence: 92%

Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Huang

Xiao-min

et al. 2021

Front. Environ. Sci.

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Due to the irreversibility of heavy metal pollution, the presence of heavy metals in farmland soil is associated with severe ecological risks that endanger both the environment and human health. Cadmium (Cd) and mercury (Hg) are two toxic heavy metals found widely in polluted soil. Cd is not readily fixed in the soil and is therefore easily accumulated by plants, while Hg has a wide range of pollution sources. The aims of this study were to explore the spatial variation in Cd and Hg concentrations in farmland soil in Poyang Lake Plain, China, and to assess their potential ecological risks as influenced by natural and human factors. A total of 283 soil samples were obtained from Fengcheng city, central Jiangxi Province. Data were then analyzed using geostatistics, the potential ecological risk index, Pearson’s correlation analysis, and Geodetector. The results showed moderate variation in soil Cd and Hg concentrations, with a remarkable difference in their spatial distribution. Cd concentrations in the northwest and northeast of Fengcheng were below the regional background level in Jiangxi; in most remaining areas, Cd concentrations were between the regional background level and national risk screening value. Areas with Hg concentrations lower than the regional background level were largely concentrated in the south, east and north of Fengcheng, and gradually increased towards the central, where they exceeded the regional background level but were below the national risk screening value. Overall, the potential ecological risk level of Cd was predominantly low, while that of Hg was moderate. The comprehensive potential ecological risk was low in most areas for both Cd and Hg, with some scattered areas of moderate risk. Moreover, the comprehensive potential ecological risk index of both Cd and Hg was significantly correlated with soil pH, total phosphorous, elevation, distance from a river (p < 0.01), and distance from a road (p < 0.05). The most significant factor influencing the comprehensive potential ecological risk index of these two heavy metals was soil pH of 5.2–5.6, followed by total p ≤ 0.52 mg kg−1. In conclusion, moderate pollution of Cd and Hg occurred in farmland soil in Poyang Lake Plain where their comprehensive potential ecological risk level was generally low and mainly influenced by soil pH and total phosphorous.

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Section: Discussionsupporting

confidence: 92%

Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Huang

Xiao-min

et al. 2021

Front. Environ. Sci.

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“…3 and Supplementary Materials Table B. [5][6]. Both the total heterogeneity and the residual, unexplained heterogeneities were significant (Supplementary Materials Table B.5-6).…”

Section: Zn Accumulationmentioning

confidence: 97%

“…3 and Supplementary Materials Table B. [5][6]. The accumulation rate of Zn was significantly different among plant parts, as willow stems ac Fig.…”

Section: Zn Accumulationmentioning

confidence: 98%

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Heavy metal uptake by plant parts of willow species: A meta-analysis

Tőzsér

Magura

Simon

2017

Journal of Hazardous Materials

108

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Previous studies on phytoremediation reported contradictory or inconsistent results on the Cd, Pb, and Zn accumulation in and among plant parts of willow (Salix) species. We hypothesized that metals could accumulate in all plant organs in different concentrations and the metal accumulation in tissues would be increased with exposure time. Furthermore, we analysed the effect of soil pH on metal accumulation, and the correlation between metals. We evaluated published information on Cd, Pb, and Zn accumulation in root, stem, twig, and leaf of willow species using meta-analysis. Results showed that all parts of willow species accumulated significantly more Cd, Pb, and Zn in contaminated soils than in uncontaminated soils. However, the metal accumulation was significantly different among plant parts. We concluded that willow species were proven to be prosperous accumulators of Cd (twigs and leaves), Pb (roots and twigs) and Zn (twigs). We found that Cd accumulation rate in stems is higher in soils with lower pH. Significant positive correlation was found between the accumulations of Cd and Zn in stems. Accumulation rates of Cd (both in leaves and twigs) and Zn (in twigs) were increased significantly with exposure time and the accumulation was successful for at least 3 years.

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“…Another research carried out in this area showed that Cr, Ni, Co, Mn, Cu, and As were mainly came from natural sources. Cd/Hg and Pb/Zn originated from anthropogenic sources in two different groups [57].…”

Section: Te Apportionment In Urban and Industrial Top Soilmentioning

confidence: 99%

Data Mining for Source Apportionment of Trace Elements in Water and Solid Matrix

Shan¹,

Shi²

2021

Trace Metals in the Environment - New Approaches and Recent Advances

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Trace elements migrate among different environment bodies with the natural geochemical reactions, and impacted by human industrial, agricultural, and civil activities. High load of trace elements in water, river and lake sediment, soil and air particle lead to potential to health of human being and ecological system. To control the impact on environment, source apportionment is a meaningful, and also a challenging task. Traditional methods to make source apportionment are usually based on geochemical techniques, or univariate analysis techniques. In recently years, the methods of multivariate analysis, and the related concepts data mining, machine learning, big data, are developing fast, which provide a novel route that combing the geochemical and data mining techniques together. These methods have been proved successful to deal with the source apportionment issue. In this chapter, the data mining methods used on this topic and implementations in recent years are reviewed. The basic method includes principal component analysis, factor analysis, clustering analysis, positive matrix fractionation, decision tree, Bayesian network, artificial neural network, etc. Source apportionment of trace elements in surface water, ground water, river and lake sediment, soil, air particles, dust are discussed.

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Identifying sources and hazardous risks of heavy metals in topsoils of rapidly urbanizing East China

Cited by 43 publications

References 39 publications

Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Spatial Variation in Cadmium and Mercury and Factors Influencing Their Potential Ecological Risks in Farmland Soil in Poyang Lake Plain, China

Heavy metal uptake by plant parts of willow species: A meta-analysis

Data Mining for Source Apportionment of Trace Elements in Water and Solid Matrix

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