Pollution characteristics, source apportionment, and health risk of heavy metals in street dust of Suzhou, China
To analyze the pollution characteristics, source apportionment, and health risk of heavy metals (HMs) in street dust of Suzhou, China, 23 sampling sites were selected and periodically sampled for 12 months. A total of 276 samples were collected, and the concentrations of selected HMs (e.g., Cr, Cu, Fe, Mn, Pb, V, and Zn) were examined with an X-ray fluorescence spectrum analyzer. Results showed that the mean concentrations of Cr, Cu, Fe, Mn, Pb, V, and Zn in the street dust of Suzhou were 112.9, 27.5, 19941.3, 410.3, 45.2, 75.6, and 225.3 mg kg−1, respectively. Cr, Cu, Pb, and Zn exceeded their background values in local natural soils by 1.3–3.6-fold, whereas Fe, Mn, and V were all within their background values. However, enrichment factor analysis revealed that Cr, Cu, Mn, Pb, V, and Zn, especially Cr, Cu, Pb, and Zn, were enriched in Suzhou street dust. The HMs showed no significant seasonal changes overall, but spatial distribution analysis implied that the high values of Cr, Cu, Mn, Pb, V, and Zn were mainly distributed in areas with frequent human activities. Results of multivariate techniques (e.g., Pearson correlation, hierarchical cluster, and principal components analyses) suggested that Pb and Zn had complicated sources; Cu and V mainly originated from traffic sources; Fe and Mn mainly came from natural sources; and Cr was dominantly related to industrial district. Health risk assessment revealed that a single heavy metal might not cause both non-cancer and carcinogenic risks to local residents. Nevertheless, the sum of the hazard index of all selected HMs for children slightly exceeded the safety value, thereby implying that the HMs from Suzhou street dust can possibly produce significant risk to children. Cr was the priority pollutant in the study area because of its high concentration, high enrichment, and high contribution to non-cancer risk values.
KeywordsStreet dust Heavy metal Pollution characteristic Source apportionment Health risk assessment Coal resource city
This work was supported by the National Natural Science Foundation of China (41373095) and the open projects of collaborative innovation center of Suzhou regional development (2015SZXTZXKF04). The authors thank Muneeb Ur Rehman Muhammad from Beihang University for his help in the English revision of this study.
Compliance with ethical standards
Conflict of Interest
The authors declare that they have no conflict of interest.
- BMRIEP (Bejing Municipal Research Institute of Environmental Protection) (2009) Environmental Site Assessment Guideline, DB11/T656–2009. Bejing Municipal Administration of Quality and Technology Supervision, Beijing (in Chinese)Google Scholar
- Bourliva A, Christophoridis C, Papadopoulou L, Giouri K, Papadopoulos A, Mitsika E, Fytianos K (2016) Characterization, heavy metal content and health risk assessment of urban road dusts from the historic center of the city of Thessaloniki. Greece Environ Geochem Health. doi: 10.1007/s10653-016-9836-y Google Scholar
- CNEMC (China National Environmental Monitoring Centre) (1990) Background values of elements in China soil. China Environmental Science Press, Beijing, pp. 342–378Google Scholar
- Huang J, Li F, Zeng G, Liu W, Huang X, Xiao Z, Wu H, Gu Y, Li X, He X, He Y (2016) Integrating hierarchical bioavailability and population distribution into potential eco-risk assessment of heavy metals in road dust: a case study in Xiandao District, Changsha city, China. Sci Total Environ 541:969–976. doi: 10.1016/j.scitotenv.2015.09.139 CrossRefGoogle Scholar
- Li Q (2015) Water quality trend analysis and water quality evaluation of the main river in Suzhou City. Dissertation, AnHui University of Science and Technology, Huainan, pp 9-12. (in Chinese)Google Scholar
- Li XY (2013) Influence of season change on the level of heavy metals in outdoor settled dusts in different functional areas of Guiyang City. Environ Sci 34:2407–2415 (in Chinese) doi: 0250-3301(2013)06-2407-09Google Scholar
- RAIS (Risk Assessment Information System) (2014) US Department of Energy’s, Oak Ridge Operations Office. http://rais.ornl.gov/Google Scholar
- Tang RL, Ma KM, Zhang YX, Mao QZ (2012) Health risk assessment of heavy metals of street dust in Beijing. Acta Sci Circumstantiae 32:2006–2015 (in Chinese) doi: 0253-2468(2012)08-2006-10Google Scholar
- USEPA (United States Environment Protection Agency) (1989) Risk assessment guidance for superfund, vol I: Human health evaluation manual. EPA/540/1-89/002. Office of Solid Waste and Emergency Response, WashingtonGoogle Scholar
- USEPA (United States Environment Protection Agency) (1996) Soil screening guidance: technical background document, EPA/540/R–95/128, Office of Solid Waste and Emergency Response: Washington.Google Scholar
- USEPA (United States Environment Protection Agency) (2002) Supplemental guidance for developing soil screening levels for superfund sites. OSWER 9355.4-24. Office of Solid Waste and Emergency Response, WashingtonGoogle Scholar
- Wang K, Li QC (2014) Seasonal variation of heavy metals and health risk assessment in street dust in Wuhan. Chin J Soil Sci 45:716–721 (in Chinese)Google Scholar
- Yang M, Li XY (2014) Dynamic changes and cause analysis of heavy metals in street dust in Guiyang City, China. Acta Sci Circumst 34:2070–2076 in ChineseGoogle Scholar
- Yuan XT, Zhang CL (2013) Distribution and evaluation on potential ecological risk of heavy metals in soils of Suzhou. Chin J Soil Sci 44:232–235 (in Chinese) doi: 0564-3945(2013)01-0232-04Google Scholar