Chemical speciation, pollution and ecological risk of toxic metals in readily washed off road dust in a megacity (Nanjing), China

Liu, Enfeng; Wang, Xiaoyu; Liu, Huiji; Liang, Mengyao; Zhu, Yuanrong; Li, Zijun

doi:10.1016/j.ecoenv.2019.02.019

Cited by 64 publications

(19 citation statements)

References 64 publications

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“…Atmospheric environmental pollution in urban areas has gained considerable attention from scholars and scientific researchers in recent decades, since it is closely relevant to people's daily lives and traffic and causes severe harm to the human body and low visibility (Liu et al 2019). Studies of the content of fine particulate matter (PM2.5) (Cooper et al 2019;Wang et al 2020), organic contaminants, such as polycyclic aromatic hydrocarbons (PAHs) (Ma et al 2019;Škrbić et al 2019;Wang et al 2016b), polybrominated diphenyl ethers (PBDEs) (Chou et al 2019), and phthalate esters (PAEs) (He et al 2019;Škrbić et al 2016), and heavy metals (HM) (Cai et al 2019;Lanzerstorfer and Logiewa 2019), such as zinc, lead, nickel, and cadmium, have been used for Responsible Editor: Philipp Gariguess Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-08942-7) contains supplementary material, which is available to authorized users.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of pollution characteristics and human health risk assessment of exposure to heavy elements in road dust from different functional areas of Zhengzhou, China

Wang

Shen

Kang

et al. 2020

Environ Sci Pollut Res

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Road dust from different sources directly contacts the human body and has potential effects on public health. In this study, a total number of 87 road dust samples were collected at 29 sampling sites from five different functional areas (commercial area (CA), residential area (RA), educational area (EA), industrial area (IA), and park area (PA)) in Zhengzhou to study the contamination status, distribution, source identification, ecological risk assessment, and spatial distribution of human health risks due to eight heavy elements. The geo-accumulation index (I geo) and pollution index (PI) revealed that there was very high contamination with Cd and Hg caused by atmospheric deposition, which should be paid special attention. Additionally, the source identification indicated that Cr, Ni, Cu, Zn, Cd, and Pb originate from anthropogenic activities related to traffic, and Hg can originate from medical equipment and agricultural chemicals, while the extremely low level of pollution with As could be explained by geographic sources. Moreover, the calculated ecological risk index values were increased in the order of CA > RA > EA > IA > PA in different functional areas. According to the human health risks of the whole city, children exposed to Pb have the highest health risk, especially for CA and IA, as calculated by the noncarcinogenic hazard index (HI). For adults and children, health risks caused by Cu, Zn, and Pb were higher in the CA, RA, and PA of the downtown area, whereas Cr and Ni had the highest noncarcinogenic exposure risk in northwestern Zhengzhou due to point source pollution. Calculations of the carcinogenic risk (CR) values for Cr, Ni, As, and Cd indicate that the value of Cr is highest (1.17 × 10 −7), especially inside the industrial area (8.55 × 10 −7), which is close to the lower limit of the threshold values (10 −6 to 10 −4). These results can provide a theoretical basis and data support for air treatment, pollution control, and the implementation of public prevention in different functional areas of Zhengzhou.

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Section: Introductionmentioning

confidence: 99%

Spatial distribution of pollution characteristics and human health risk assessment of exposure to heavy elements in road dust from different functional areas of Zhengzhou, China

Wang

Shen

Kang

et al. 2020

Environ Sci Pollut Res

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“…Wang et al [9] used the potential ecological risk index (PERI) to quantify degree of metal pollution and assess the ecological risk of heavy metals in soils. Although the PERI considers the toxicity and total concentrations of heavy metals, a degree of subjective assessment is involved and chemical speciation is ignored [8,10,11], even though toxicity and mobility are strongly dependent on the latter [12,13]. The risk assessment code (RAC) was introduced because of the advantage of comprehensive analysis of heavy metals and other components in soil, providing a better indication of relationships between bioavailability and mobility, as well as environmental risk [8,14].…”

Section: Introductionmentioning

confidence: 99%

Heavy Metals in Agricultural Soils of the Lihe River Watershed, East China: Spatial Distribution, Ecological Risk, and Pollution Source

Chen

Wang

et al. 2019

IJERPH

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Concentrations of cadmium, chromium, copper, nickel, lead, and zinc in agricultural soils at 32 sites in the Lihe River Watershed of the Taihu region, East China, and their potential ecological risks and possible sources were investigated. Enrichment factor analysis demonstrated enrichment in the order Cd > Pb > Zn > Cu > Ni > Cr. The potential ecological risk index and risk assessment code analyses indicated that, of the metals studied, Cd posed the most significant ecological risk in the study area. Statistical analyses, GIS mapping, and enrichment factor analysis suggested that Cd, Pb, Cu, and Zn were derived mainly from anthropogenic sources, including agricultural, industrial, and vehicular emissions, while Cr and Ni were mainly from natural sources. Positive matrix factorization revealed that Cd, Cr, Cu, Ni, Pb, and Zn were sourced from industrial and vehicular emissions (73.7%, 21.3%, 71.4%, 20.3%, 75.0%, and 62.2%, respectively), the agricultural sector (26.3%, 36.3%, 6.8%, 38.9%, 15.7%, and 6.9%, respectively), and parent materials (0%, 42.4%, 21.8%, 40.8%, 9.2%, and 30.9%, respectively). It was recommended that strategies be implemented to reduce industrial point-source pollution.

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“…Soil was collected from an agriculture experimental eld with an annual mean temperature of 15.4℃ and annual precipitation of 1106 mm (Liu et al 2019) at Nanjing, Jiangsu Province, China (32.06°N, 118.54°E). Five 0.5×0.5 m sample plots were randomly selected, and the topsoil (0-20 cm) was collected and mixed.…”

Section: Soil Collectionmentioning

confidence: 99%

After Life Effect of Endophytic Bacterium Bacillus Cereus on Litter Decomposition

Pang

et al. 2021

Preprint

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Background and aims: Endophytic microorganisms exist commonly in plants and are recognized to increase plant growth especially under adverse physical environmental conditions. We here demonstrate that endophytic bacteria (EB) Bacillus cereus can accelerate the decomposition of plant litter and enhance nutrient availability for plant growth.Methods: We first obtained plant litter with and without EB inoculation using a model plant Arabidopsis thaliana in a microcosmic experiment, then conducted a litter decomposition experiment to investigated the effect of EB on litter decay rate, phosphorus availability, and on soil microbial community structure. We further evaluated wheat (Triticum aestivum) biomass growth using soils treated with and without EB.Results: Inoculation of EB significantly increased the mass loss of Arabidopsis litter in the middle stage of decomposition, elevated the activity of alkaline phosphatase in the early stage of decomposition, and increased soil available P at the end of decomposition. Analyses of Illumina MiSeq sequencing and structural equation models also indicated that EB inoculation had pronounced impact on the bacterial abundance and diversity in soil. Finally, the growth of the wheat was significantly promoted in the litter with EB decomposition system. Conclusion: EB mediated host after-life effect likely through accelerating the release of nutrients such as P from decomposing plant litter and regulating the structure of soil microorganisms, promoting the sustainability of nutrient utilization efficiency in a terrestrial ecosystem.

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Chemical speciation, pollution and ecological risk of toxic metals in readily washed off road dust in a megacity (Nanjing), China

Cited by 64 publications

References 64 publications

Spatial distribution of pollution characteristics and human health risk assessment of exposure to heavy elements in road dust from different functional areas of Zhengzhou, China

Spatial distribution of pollution characteristics and human health risk assessment of exposure to heavy elements in road dust from different functional areas of Zhengzhou, China

Heavy Metals in Agricultural Soils of the Lihe River Watershed, East China: Spatial Distribution, Ecological Risk, and Pollution Source

After Life Effect of Endophytic Bacterium Bacillus Cereus on Litter Decomposition

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