Population exposure to PAHs in Tianjin area

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1 Acta Scientiae Circumstantiae Vol. 25,No. 7 Jul., 2005,,,. [J ].,2005,25 (7) : LI Xinrong, LI Bengang, TAO Shu, et al. Population exposure to PAHs in Tianjin area[j ]. Acta Scientiae Circumstantiae,2005,25 (7) : , 1, 1, 3, 1, 1, 1, 1, 1, 2 11,, , : : : : PAHs, -, 16 PAHs., 313 g kg - 1 d - 1, g kg - 1 d %, 20 %, 5 %. 8 PAHs 0138 g kg - 1 d - 1, g kg - 1 d - 1. : ; ; ; : (2005) :X80214 :A Population exposure to PAHs in Tianjin area LI Xinrong 1, LI Bengang 1, TAO Shu 1, 3, GUO Miao 1, CAO Jun 1, WANG Xuejun 1, LIU Wenxin 1, XU Fuliu 1, WU Yongning 2 1. Laboratory for Earth Surface Processes, College of Environmental Sciences, Peking University, Beijing , China 2. Institute of Nutrition and Food Hygiene, Chinese Academy of Preventive Medicine, Beijing , China Received 29 October 2004 ; received in revised form 15 April 2005 ; accepted 25 April 2005 Abstract : The population exposure to PAHs in Tianjin area was estimated based on field test data and other data from the literature. A multimediaπmulti2pathway human exposure model was employed to calculate the populations Chronic Daily Intake (CDI) of PAHs. The population s lifelong CDI was 313 g kg - 1 d - 1 in this area. And the daily exposures of child, youth and adult were 413, 318, and 311 g kg - 1 d - 1, respectively. Diet exposure was the most important route, accounting for around 75 % of total dose. Respiration ranked second, and contributed 20 % of the total dose. Lifelong CDI of eight carcinogenic PAHs was 0138 g kg - 1 d - 1, and it were 0148, 0145 and 0136 g kg - 1 d - 1 respectively in the three sub2populations. Keywords :population exposure ; PAHs ; food ; respiration ( PAHs), [1 ].,., -.,, (NHEXAS) 46 [2 ]. Van den Berg [3 ]., 16 PAHs ( PAH 16 ),. 1 EPA [4 ].,, : ( , ), (2003CB415004), : (1975 ),, ; 3 ( ) Foundation item :National Scientific Foundation of China (No , ) ; National Basic Research Program(No. 2003CB415004) Biography :LI Xinrong(1975 ), female, Ph. D. candidate ; 3 Corresponding author

2 990 25,.,, (0 6 ) (6 18 ) ( > 18 ) 3., [10 ], [4,11 ].,.,, 50.,. 100 %,., ,, 3 PAH g kg - 1 d g kg - 1 d - 1.,.., 77 g d g d - 1, 177 g d PAHs (PAH 8 ), 0138 g kg - 1 d g kg - 1 d g d - 1. PAH 8 (3112, ( ) ( ) ( ) ( ). g d - 1 ) [12 ] PAH 16 PAH 8. 70,. 2, (13 ) (9 ), 22, [ 5 ], [1 ], [6 ], 5. [7 9 ]. 2. 1, PAHs. 75 % % 75 % 74 %.,, PAH %., ( PAHs ).,, 1314 % %.,,. (24 ) (12 ). 1 PAH 16 PAH 8 (a) PAH 16 ; (b) PAH 8 Fig. 1 Contributions of various pathways to Tianjin s population exposure of PAH 16 and PAH 8 1 PAH 8. PAH 16,. PAH 8,

3 7 : 991, 617 % 815 %., 912 %. PAH 16, PAH 8,3 40 %. PAH 8, 10 [8 ]. 213 PAHs, PAH. 3., 2 16 PAH Fig. 2 Life2time average exposure of Tianjin s residence to 16 PAH compounds,,., 60 %,, 11 % 6 % Van den Berg 11 PAHs 1 [3 ].,Van den Berg,., [1 ]., PAHs [13 ].,. 1 PAHs.,.,, 80, ,. 1 PAHs 1) Table 1 Comparison of dietary intakes of PAHs between Tianjin and other countries PAHs (1983) [15 ] (1990) [13 ] (1991) ( ) [9 ] (2000) [16 ] (Nap) (Any) (Ane) (Fle) (Phe) (Ant) (Fla) (Pyr) (a) (Baa) (Chr) (b) (Bbf) (k) (Bkf) (a) (Bap) (1,2,32cd) ( I1p) (a,h) (Daa) (ghi) (Bgp) PAHs ) :1) ;2)

4 992 25, PAH 8 96 % [12 ], PAHs 93 % 97 % [14 ].,, PAH g d g d g d % 1715 % 2111 %, 20 %. 3 % 7 % [12,14 ]..,., g d - 1 PAHs [12 ]., PAHs PAHs., (90 %). 3,,, PAHs., 4 25 PAHs,., ( ), 3 PAHs Fig. 3 Distribution pattern of PAHs with various numbers of rings in major exposure routes and media,. 4, PAHs g kg - 1 d - 1,., 3Π4, 1Π5,.. : (1950 ),,.. :. E2mail urban. pku. edu. cn ( References) : [ 1 ] Tao S, Cui Y H, Xu F L, et al. Polycyclic aromatic hydrocarbons in agricultural soil and vegetables from Tianjin [J ]. Sci Total Environ, 2004, 320 : [ 2 ] Sexton K, Kleffman D, Callahan M. An introduction to the national human exposure assessment survey [ J ]. Expo Anal Environ Epidemiol, 1995, (5) : [ 3 ] Van den Berg R. Human exposure to soil contamination : a qualitative analysis towards proposals for humane toxicological intervention values (partly revised edition) [ R]. No Netherlands : National Institute of Public Health and Environmental Protection, 1994 : 1 93 [ 4 ] USEPA, Exposure factors handbook : EPAΠ600ΠP295Π002Fa [ CD ], Washington, DC 20460, Office of Research and Development, National Center for Environmental Assessment, U. S. Environmental Protection Agency, 1997 :sec [ 5 ] Wu S P, Zuo Q, Lan T, et al. PAHs in Airborne Particles from Tianjin in Winter Season [ J ]. Environmental Science, 2004, 25 (4) : (in Chinese) [ 6 ] Cui Y H. Bioavailability of Soil PAHs to Plant Uptake [D]. Beijing :

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