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Pollution and health risk of potentially toxic metals in urban road dust in Nanjing, a mega-city of China.
Sci Total Environ. 2014 Apr 01; 476-477:522-31.ST

Abstract

Spatial variations in concentrations of a suite of potentially toxic metals (Ba, Cr, Cu, Fe, Mn, Ni, Pb and Zn) and Ca in road dusts (n=99) from urban trunk roads (TR) in Nanjing, a mega-city in China, were established. Metal pollution levels, sources and human health risk (non-carcinogenic) were studied. In contrast to previous studies, we labeled the indicative metals relating to non-exhaust traffic emissions by comparing metal pollution between crossroad and park road dusts, and then anthropogenic sources of metals in TR dusts were assessed combining their spatial pollution patterns, principal component analysis and Pb isotopic compositions. Results showed that the metals were enriched in TR dusts compared to background soil concentrations with mean enrichment factors (EFs) of 2.2-23, indicating considerable anthropogenic influence. The degrees of metal pollution ranged from minimal to extremely high and ranked by Ca>Cu>Pb≈Zn>Cr≈Fe>Ni≈Ba>Mn on average. Pollution of Cr, Cu, Fe, Mn, Ni, Pb and Zn in TR dusts resulted primarily from industrial emissions (e.g., coal combustion and smelting) and high pollution levels were found close to suburb industrial complexes, whereas pollution of Ba and Ca was mainly related to construction/demolition sources and was generally distributed homogeneously. The relatively minor contribution of non-exhaust traffic emissions to metal pollution in TR dusts was considered to be due to overwhelming industrial and construction/demolition contributions, as well as to the dilution effect of natural soil particles. Ingestion appears to be the major route of exposure for road dust for both adults and children, followed by dermal contact. The non-carcinogenic health risk resulting from exposure to the potentially toxic metals in TR dusts was within the safe level based on the Hazard Index (HI), except in pollution hotspots where exposure to Pb, Cr, and Cu may be hazardous to children.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Liu E
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. Electronic address: efliu@niglas.ac.cn.
Yan T
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
Birch G
School of Geosciences, University of Sydney, Sydney, NSW 2006, Australia.
Zhu Y
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.

MeSH

AdultAutomobilesChildChinaCitiesDustEnvironmental ExposureEnvironmental PollutionHumansMetals, HeavyRisk AssessmentSoil Pollutants

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24496025

Citation

Liu, Enfeng, et al. "Pollution and Health Risk of Potentially Toxic Metals in Urban Road Dust in Nanjing, a Mega-city of China." The Science of the Total Environment, vol. 476-477, 2014, pp. 522-31.
Liu E, Yan T, Birch G, et al. Pollution and health risk of potentially toxic metals in urban road dust in Nanjing, a mega-city of China. Sci Total Environ. 2014;476-477:522-31.
Liu, E., Yan, T., Birch, G., & Zhu, Y. (2014). Pollution and health risk of potentially toxic metals in urban road dust in Nanjing, a mega-city of China. The Science of the Total Environment, 476-477, 522-31. https://doi.org/10.1016/j.scitotenv.2014.01.055
Liu E, et al. Pollution and Health Risk of Potentially Toxic Metals in Urban Road Dust in Nanjing, a Mega-city of China. Sci Total Environ. 2014 Apr 1;476-477:522-31. PubMed PMID: 24496025.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pollution and health risk of potentially toxic metals in urban road dust in Nanjing, a mega-city of China. AU - Liu,Enfeng, AU - Yan,Ting, AU - Birch,Gavin, AU - Zhu,Yuxin, Y1 - 2014/02/01/ PY - 2013/08/25/received PY - 2014/01/15/revised PY - 2014/01/16/accepted PY - 2014/2/6/entrez PY - 2014/2/6/pubmed PY - 2014/9/23/medline KW - Health risk KW - Metals KW - Pollution KW - Road dust KW - Source SP - 522 EP - 31 JF - The Science of the total environment JO - Sci Total Environ VL - 476-477 N2 - Spatial variations in concentrations of a suite of potentially toxic metals (Ba, Cr, Cu, Fe, Mn, Ni, Pb and Zn) and Ca in road dusts (n=99) from urban trunk roads (TR) in Nanjing, a mega-city in China, were established. Metal pollution levels, sources and human health risk (non-carcinogenic) were studied. In contrast to previous studies, we labeled the indicative metals relating to non-exhaust traffic emissions by comparing metal pollution between crossroad and park road dusts, and then anthropogenic sources of metals in TR dusts were assessed combining their spatial pollution patterns, principal component analysis and Pb isotopic compositions. Results showed that the metals were enriched in TR dusts compared to background soil concentrations with mean enrichment factors (EFs) of 2.2-23, indicating considerable anthropogenic influence. The degrees of metal pollution ranged from minimal to extremely high and ranked by Ca>Cu>Pb≈Zn>Cr≈Fe>Ni≈Ba>Mn on average. Pollution of Cr, Cu, Fe, Mn, Ni, Pb and Zn in TR dusts resulted primarily from industrial emissions (e.g., coal combustion and smelting) and high pollution levels were found close to suburb industrial complexes, whereas pollution of Ba and Ca was mainly related to construction/demolition sources and was generally distributed homogeneously. The relatively minor contribution of non-exhaust traffic emissions to metal pollution in TR dusts was considered to be due to overwhelming industrial and construction/demolition contributions, as well as to the dilution effect of natural soil particles. Ingestion appears to be the major route of exposure for road dust for both adults and children, followed by dermal contact. The non-carcinogenic health risk resulting from exposure to the potentially toxic metals in TR dusts was within the safe level based on the Hazard Index (HI), except in pollution hotspots where exposure to Pb, Cr, and Cu may be hazardous to children. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/24496025/Pollution_and_health_risk_of_potentially_toxic_metals_in_urban_road_dust_in_Nanjing_a_mega_city_of_China_ DB - PRIME DP - Unbound Medicine ER -