1Spatial distribution, Health risk assessment and isotopic

2composition of lead contamination of street dusts in different

3functional areas of Beijing, China

4Lanfang Han a, b, Bo Gao a, c, *, Xin Wei b, Dongyu Xu a, c, Li Gao a, b

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8a State key laboratory of simulation and regulation of water cycle in river basin, China Institute of

9Water Resources and Hydropower Research, Beijing, 100038, China

10b State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal

11University, Beijing 100875, China

12c Department of Water Environment, China Institute of Water Resources and Hydropower

13 Research, Beijing, 100038, China

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24*Correspondence should be addressed to [email protected].

1 1 2 25 26 27Table S1 ESS-1 certified values, analytical values and recovery Element Analytical values (mg/kg) Certified values Recovery (%) (mg/kg) Pb 22.80 23.60 96.60

3 2 4 Table S2 Comparison of Pb isotopic compositions between this study and other specific sources Samples 206Pb/207Pb 208Pb/207Pb Reference Anthropogenic Pb sources Coal in Shanghai 1.140 2.395 (Zheng et al. 2010) Coal in Shanghai 1.163 2.462 (Tan et al. 2006) Coal in Shanghai 1.163 2.456 (Tan et al. 2006) Coal in Beijing 1.155 N/Aa (Widory et al. 2010) Northern China coal 1.178 2.503 (Zheng et al. 2010) Vehicle exhaust (leaded) 1.110 2.434 (Chen et al. 2005) Vehicle exhaust (unleaded) 1.147 2.435 (Chen et al. 2005) Cement (Hebei) 1.179 N/Aa (Widory et al. 2010) Cement (Beijing) 1.161 N/Aa (Widory et al. 2010) Cement (Hebei) 1.142 N/Aa (Widory et al. 2010) Cement (Shanghai) 1.163 2.447 (Tan et al. 2006) Ore (Hebei) 1.072 2.452 (Zhu 1995) Ore (Hebei) 1.090 2.438 (Zhu 1995) Ore (Qinling) 1.118 2.432 (Zhu 1995) Ore (Qinling) 1.129 2.432 (Zhu 1995) Aerosol in Beijing 1.142-1.172 N/Aa (Li et al. 2013) Aerosol in Beijing 1.148 2.444 (Bing-Quan et al. 2002) Aerosol in Tianjin 1.160-1.170 N/Aa (Cheng and Hu 2010) Aerosol in Dalian 1.136 2.441 (Bing-Quan et al. 2002) Aerosol in Xiamen 1.166 2.459 (Zhu et al. 2010) Aerosol in Taipei 1.145 2.405 (Hsu et al. 2006) Aerosol in Hong Kong 1.161 2.450 (Lee et al. 2007) Aerosol in Shanghai 1.162 2.445 (Chen et al. 2005) Aerosol in Guangzhou 1.168 2.457 (Lee et al. 2007) Aerosol in Chongqing 1.166 2.457 (Bollhöfer and Rosman 2001) Aerosol in Ho Chi Minh, Vietnam 1.155 2.430 (Bollhöfer and Rosman 2001) Aerosol in Bangkok, Thailand 1.127 2.404 (Bollhöfer and Rosman 2001) Aerosol in Kuala Lumpur, Malaysia 1.141 2.410 (Bollhöfer and Rosman 2001) Aerosol in Jakarta, Indonesia 1.131 2.395 (Bollhöfer and Rosman 2001) This study HDTA (N=36) 1.145 ± 0.009 2.436 ± 0.014 This study TA (N=20) 1.155 ± 0.006 2.450 ± 0.008 This study EA (N=26) 1.147 ± 0.009 2.439 ± 0.013 This study RA (N=10) 1.139 ± 0.010 2.444 ± 0.007 This study a not available. 28 29Literatures cited in Table S2: 30

5 3 6 31Bing-Quan Z, Yu-Wei C, Xiang-Yang C (2002) Application of Pb isotopic mapping to environment 32 evaluation in China. Chem Speciation Bioavailability 14: 49-56 33Bollhöfer A, Rosman K (2001) Isotopic source signatures for atmospheric lead: the Northern 34 Hemisphere. Geochim Cosmochim Acta 65: 1727-1740 35Chen J, Tan M, Li Y, Zhang Y, Lu W, Tong Y, Zhang G, Li Y (2005) A lead isotope record of Shanghai 36 atmospheric lead emissions in total suspended particles during the period of phasing out of 37 leaded gasoline. Atmos Environ 39: 1245-1253 38Cheng H, Hu Y (2010) Lead (Pb) isotopic fingerprinting and its applications in lead pollution studies in 39 China: a review. Environ Pollut 158: 1134-1146 40Hsu S-C, Liu SC, Jeng W-L, Chou CC, Hsu R-T, Huang Y-T, Chen Y-W (2006) Lead isotope ratios in 41 ambient aerosols from Taipei, Taiwan: Identifying long-range transport of airborne Pb from 42 the Yangtze Delta. Atmos Environ 40: 5393-5404 43Lee CS, Li X-D, Zhang G, Li J, Ding A-J, Wang T (2007) Heavy metals and Pb isotopic composition of 44 aerosols in urban and suburban areas of Hong Kong and Guangzhou, South China—evidence 45 of the long-range transport of air contaminants. Atmos Environ 41: 432-447 46Li H, Qian X, Hu W, Wang Y, Gao H (2013) Chemical speciation and human health risk of trace metals 47 in urban street dusts from a metropolitan city, Nanjing, SE China. Sci Total Environ 456: 212- 48 221 49Tan M, Zhang G, Li X, Zhang Y, Yue W, Chen J, Wang Y, Li A, Li Y, Zhang Y (2006) Comprehensive 50 study of lead pollution in Shanghai by multiple techniques. Anal Chem 78: 8044-8050 51Widory D, Liu X, Dong S (2010) Isotopes as tracers of sources of lead and strontium in aerosols (TSP 52 & PM 2.5) in Beijing. Atmos Environ 44: 3679-3687 53Zheng N, Liu J, Wang Q, Liang Z (2010) Health risk assessment of heavy metal exposure to street dust 54 in the zinc smelting district, Northeast of China. Sci Total Environ 408: 726-733 55Zhu B (1995) The mapping of geochemical provinces in China based on Pb isotopes. J Geochem 56 Explor 55: 171-181 57Zhu L, Guo L, Gao Z, Yin G, Lee B, Wang F, Xu J (2010) Source and distribution of lead in the surface 58 sediments from the South China Sea as derived from Pb isotopes. Mar Pollut Bull 60: 2144- 59 2153 60 61 62

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