Source apportionment of heavy metals in urban road dust in a continental city of eastern China: Using Pb and Sr isotopes combined with multivariate statistical analysis

Liu, Zhao; Hu, Gongren; Yu, Yongtae; Yu, Ruilian; Cui, Jinlong; Wang, Xiaoming; Yan, Yan

doi:10.1016/j.atmosenv.2018.12.050

Cited by 82 publications

(14 citation statements)

References 63 publications

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“…In addition, available phosphorus content (AP) was determined using molybdenum–antimony–scandium colorimetry after soil extraction with ammonium bicarbonate. Also, flame photometry was applied to quantify available potassium (AK) in ammonium acetate soil extracts [ 34 ]. Turbidimetry with barium sulphate was used to determine available sulfur (AS) after soil extraction with calcium chloride.…”

Section: Methodsmentioning

confidence: 99%

Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar

Zhu

Chen

et al. 2020

IJERPH

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Cadmium presence in soil is considered a significant threat to human health. Biochar is recognized as an effective method to immobilize Cd ions in different soils. However, obtaining effective and viable biochar to remove elevated Cd from postmining soil remains a challenge. More modifiers need to be explored to improve biochar remediation capacity. In this investigation, pot experiments were conducted to study the effects of poplar-bark biochar (PBC600) and thiourea-modified poplar-bark biochar (TPBC600) on Cd speciation and availability, as well as on soil properties. Our results showed that the addition of biochar had a significant influence on soil properties. In the presence of TPBC600, the acid-soluble and reducible Cd fractions were transformed into oxidizable and residual Cd fractions. This process effectively reduced Cd bioavailability in the soil system. Compared to PBC600, TPBC600 was more effective in improving soil pH, electrical conductivity (EC), organic matter (SOM), total nitrogen (TN), ammonium nitrogen (NH4+-N), nitrate nitrogen (NO3--N), available potassium (AK), available phosphorus (AP), and available sulfur (AS). However, this improvement diminished as incubation time increased. Results of Pearson correlation analysis, multivariate linear regression analysis, and principal component analysis showed that soil pH and available phosphorus played key roles in reducing the available cadmium in soil. Therefore, TPBC600 was shown to be an effective modifier that could be used in the remediation of soil polluted with Cd.

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Section: Methodsmentioning

confidence: 99%

Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar

Zhu

Chen

et al. 2020

IJERPH

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“…Slime, which is a mixture of coal, clay, and water, is the main domestic fuel in these rural areas, and a large amount of smoke dust is generated by coal combustion and residual coal ash and poured into the soil, causing the accumulation of heavy metals in soil. It is generally believed that the source of Pb is the emissions of automobile exhaust that enters the soil through atmospheric deposition; this Pb can remain in the soil environment for a long time [61,65]. It could be concluded that Factor 2 indicates a comprehensive source of pollution caused by atmospheric subsidence of coal burning and traffic emissions.…”

Section: Source Identification Of Metals By Pmfmentioning

confidence: 99%

Ecological Health Risk Assessment and Source Identification of Heavy Metals in Surface Soil Based on a High Geochemical Background: A Case Study in Southwest China

Ziwan

Xu²,

Duan

et al. 2022

Toxics

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A total of 28,095 surface soil samples were collected in areas with high natural background levels; the potential ecological risk is generally low, and the high-risk area is small and mainly affected by lead–zinc mines. The contribution to the potential ecological risk factor (RI) is as follows: Hg > Cd > As > Pb > Cu > Ni > Cr > Zn, with noncarcinogenic chronic risks of Cr > As > Cd > Pb > Ni > Cu > Hg > Zn; furthermore, dermal contact is the main pathway of exposure causing health risks. The total carcinogenic risks caused by heavy metals were as follows: Cr > Cd > As > Pb; and the risks posed by Cr, Cd, and As were higher than the threshold value (1.0 × 10−4); people face a higher threat to heavy metals in soils in Zhenxiong, Ludian, Huize, Weixin, and Zhaoyang. The evaluation result of the EPA PMF model shows that the soil heavy metals are mainly composed of five sources, of which basalt, Permian, and Triassic carbonate rock parent material constitute the natural background source, while the mining activities of lead–zinc mines and the emissions of coal burning by residents constitute the anthropogenic source. The contribution was ranked in order of lead–zinc mining (26.7%) > Triassic carbonate (23.7%) > basalt (20.9%) > coal burning and automobile emissions (16.1%) > Permian carbonate (12.6%).

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“…Surface deposited sediment is often used as an indicator in urban geochemical studies [15][16][17][18][19] . Sediments are lithologically and geochemically associated with the territory of the city, thus they reflect the geochemical conditions of the surrounding area.…”

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confidence: 99%

Urban geochemical changes and pollution with potentially harmful elements in seven Russian cities

Seleznev

Yarmoshenko

Malinovsky

2020

Sci Rep

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This paper presents results of an analysis of potentially harmful elements (PHEs, Pb, Zn and Cu) and conservative element (CE, Fe) concentrations in urban surface deposited sediment (USDS). The study was conducted in seven large Russian cities located in different geographic and climatic zones, and in territories with different geology and anthropogenic pressures: Chelyabinsk, Magnitogorsk, Nizhniy Novgorod, Nizhniy Tagil, Rostov-on-Don, Tyumen, and Ufa. The initial geochemical baseline relationships between PHEs and CE concentrations in the USDS were reconstructed for each city applying an approach based on linear weighted fitting of PHE as a function of CE with lower weights assigned to more polluted samples. The reconstructed average initial baseline Pb, Cu, and Zn concentrations varied between 17-52, 25-196, and 91-413 mg kg −1 , respectively. Several new criteria for assessing the degree of geochemical transformation and pollution of the urban environment, such as the percentage of polluted samples, average pollutant concentration in polluted samples, and weighting degree index δ, were suggested and compared with common criteria, such as the PHE concentration and the geo-accumulation index. The environmental rank of a city significantly differed depending on whether the criterion for ranking was total pHe pollution or changes in comparison with the initial geochemical baseline. An urban landscape is an environment formed as an upper geological strata of the Anthropocene 1,2. The content of elements in environmental compartments in an urban area changes as a result of anthropogenic activities during landscape forming. The transformation of geochemical conditions in an urban area is a permanent environmental process governed by natural and artificial components. The content of elements in compartments of the urban environment at some initial moment, that either existed in reality or is assumed, before artificial and natural components of the environment were subject to any anthropogenic impact after creation of the landscape, is considered as initial geochemical baseline (IGB) conditions. Geochemical transformation and change of the IGB is a complex process affecting all components of the urban environment 3. The primary driving forces of the geochemical transformation include pollution of the environmental compartments by point and nonpoint sources 4 and erosion and degradation of the environmental compartments as a result of natural and anthropogenic impacts 5. Geochemical transformation in the urban environment consists of altering mineral and elemental composition, modification of physicochemical properties of the urban soil 6 , urban surface deposited sediment (USDS) formation, in particular road deposited sediment 4,5,7 , changes in volume of the surface stormwater runoff 8,9 , redistribution of pollutants 3,10 , and forming geochemical barriers 7 among others. USDS is an environmental compartment that is involved with the majority of geochemical transformation processes. In the urban environment, the ra...

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Source apportionment of heavy metals in urban road dust in a continental city of eastern China: Using Pb and Sr isotopes combined with multivariate statistical analysis

Cited by 82 publications

References 63 publications

Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar

Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar

Ecological Health Risk Assessment and Source Identification of Heavy Metals in Surface Soil Based on a High Geochemical Background: A Case Study in Southwest China

Urban geochemical changes and pollution with potentially harmful elements in seven Russian cities

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