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Source identification and health risk assessment of heavy metals with mineralogy: the case of soils from a Chinese industrial and mining city

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Abstract

Understanding the precise sources of heavy metals (HMs) in soil and the contribution of these sources to health risks has positive effects in terms of risk management. This study focused on the HMs in the soil of five land uses in an industrial and mining city. The sources of HMs in soils were identified, and the soil mineralogical characteristics and health risks of HMs were discussed. The results showed that the HMs (Cu, Zn, Ni, Cd, Pb) found in the soil of the five land uses were affected by human activities. For example, the Cu in grassland, gobi beach, woodland, green belt, and farmland is 22.3, 3.5, 22.5, 16.7, and 21.3 times higher than the soil background values in Gansu Province, respectively. The Positive Matrix Factorization model (PMF) results revealed that traffic emissions and industrial and agricultural activities were the primary sources of HMs in the soil, with industrial sources accounting for the largest share at 55.79%. Furthermore, various characteristics proved that the studied HMs were closely related to smelting products. Concentration-oriented health risk assessments showed that HMs in the different soil types held non-carcinogenic and carcinogenic risks for children and adults. Contamination source-oriented health risk assessments of children and adults found that industrial activities controlled non-carcinogenic and carcinogenic risks. This study highlighted the critical effects of smelting on urban soil and the contribution of pollution sources to health risks. Furthermore, this work is significant in respect of the risk control of HMs in urban soils.

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Data Availability

The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

HMs:

Heavy metals

HM:

Heavy metal

PMF:

Positive Matrix Factorization model

Igeo :

Geoaccumulation index

EF:

Enrichment factor

PI:

Nemerow pollution index

CSI:

Contamination safety index

PCA:

Principal component analysis

CA:

Cluster analysis

APCS:

Absolute Principal Component Scores

MLR:

Multiple Linear Regression

HAR:

Human health risk

EC:

Electric conductivity

SOM:

Soil organic matter

XRD:

X’Pert Pro diffractometer

STEM:

Scanning transmission electron microscopy

HRTEM:

High-resolution transmission electron microscopy

EDS:

Energy-dispersive spectrometer

XPS:

X-ray photoelectron spectroscopy

HI:

Total exposure hazard index

TCR:

Total carcinogenic risk

CV:

Coefficient of variation

AF:

SkinAdherence factor

BW:

Average body weight

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Funding

This work was supported by the National Key Research and Development Program of China (2018YFC1802905).

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Authors

Contributions

JX helped in conceptualization, methodology, data collection and analysis, writing the original draft. YW was involved in performing the experiment, investigation, revision of the original draft. SW contributed to review, conceptualization, resources, supervision. YW and SD helped in performing the experiment and treatment of samples. ZC performed soil sampling and treatment of samples. LH investigated and visualized the study.

Corresponding author

Correspondence to Shengli Wang.

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The authors declare they have no conflict of interests.

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Xu, J., Wu, Y., Wang, S. et al. Source identification and health risk assessment of heavy metals with mineralogy: the case of soils from a Chinese industrial and mining city. Environ Geochem Health 45, 7255–7274 (2023). https://doi.org/10.1007/s10653-023-01548-1

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  • DOI: https://doi.org/10.1007/s10653-023-01548-1

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