29 9 2008 9 ENVIRONMENTAL SCIENCE Vol. 29,No. 9 Sep.,2008,,, 3,, (, 510640) : (PAHs), 2003 4 ( ) 2002 7 ( ), GC2MS PAHs., ( :410 3911 ngπl ; :1519 18214 ngπl) ( :216 2616 ngπl, :1310 2813 ngπl). PAHs. 3 PAHs, 5,6 PAHs, 3 PAHs,. PAHs ( K p ),. (lg K OC ) Π (lg K OW ),. : (PAHs) ; ; :X142 ; X131 :A :025023301(2008) 0922385207 Distribution and Partition of Polycyclic Aromatic Hydrocarbons in Surface Water from the Pearl River Estuary LUO Xiao2jun, CHEN She2jun, YU Mei, MAI Bi2xian, SHENG Guo2ying, FU Jia2mo (State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China) Abstract :To obtain the temporal and spatial distribution and partition of PAH between water and particles in coastal area, water samples were collected from the Pearl River Estuary in July 2002 ( summer) and April 2003 ( spring) and polycyclic aromatic hydrocarbons ( PAHs) were analysed with GC2MS in the present study. Total PAH concentrations in water samples were higher in spring ( c p : 41023911 ngπl ; c w : 15192 18412 ngπl) than in summer ( c p : 21622616 ngπl ; c w : 131022813 ngπl). Suspended particle matter (SPM) content, photogradation and riverine discharge were the major factors controlling the PAH concentrations in water. The 32ring PAHs were the dominant PAHs in water samples. The 5 and 6 ring PAHs are more enriched in the inner estuary samples than in outside estuary samples, and the 3 ring PAHs are more enriched in summer samples than in spring samples. The differences in composition and source of SPM might be responsible for this observation. The partition coefficient ( K p ) increased with the particular organic carbon content of SPM and salinity of water and decreased with the SPM content of samples, which were consistent with the PAH partition theory. A linear correlation between lgk OC and lg K OW were found in two sampling periods. The observed values of lgk OC exceed their predicted values calculated form linear free energy relationship between lgk OC and lg K OW. Key words :polycyclic aromatic hydrocarbons ( PAHs) ; Pearl River Estuary ; partition 2,, ( ),,., [1 ]., (80 % ) [2 ],,. (PAHs),. PAHs [3 5 ], PAHs. 2 PAHs, PAHs, PAHs. :2007209210 ; :2007210231 : (40525012) ; (973) (2003CB415002) : (1972 ),,,,,E2mail :luoxiaoj @gig. ac. cn 3,E2mail :nancymai @gig. ac. cn
2386 29 1 111 6 (1 6 ), 5 (7 11 ), 1. 2002 7 ( ) 2003 4 ( ) ( 2 ) (015 m).. 50 L 100 L,. 500mL (SPM) ( POC)., 1. 112 [ 6 ],. 017 m, XAD 1 1) Table 1 Information of sample 1 Fig. 1 Map of the sampling location ( E) (N) 1 113 4115 2 113 4717 3 113 4412 4 113 4515 5 113 4510 ΠL Π SPM Πmg L - 1 POC Π% 22 4015 4011 5416 0 0 3818 4116 1116 1111 22 3610 10810 5415 8 0 1313 2513 1145 1102 22 3213 10616 5316 10 3 1513 3010 1155 1115 22 2510 10217 10815 22 6 2417 3517 1120 0191 22 2910 10413 10315 22 10 1311 3617 1118 0191 6 113 4610 22 2110 10114 9717 24 14 1616 3118 0198 0190 7 113 5014 8 114 0415 9 114 1510 10 114 3410 11 113 2716 22 1010 9516 10813 28 35 9140 4190 3180 1134 21 510 10612 10913 30 32 4180 9100 1109 0172 22 0610 5416 10812 28 36 9180 5180 4145 1173 22 1215 10818 10819 30 32 5190 5190 2147 1140 22 5310 11011 Π 29 Π 6150 Π 2160 Π 1) 2002 7, 2003 4,,,, 1 ml ;,,, 1 ml., 70 ml Π (3 7, ),,,. [7 ].,. : 2d 8 : 4119 % 6 % ; 2d 10 : 63 % 711 % ; 2d 10 : 7913 % 419 % ; 2d 12 : 8418 % 1218 % ; 2d 12 : 9010 % 1215 %. : 2 d 8 : 37 % 15 % ; 2d 10 :57 % 711 % ; 2d 10 :7013 % 715 % ; 2d 12 :7418 % 719 % ; 2d 12 : 111 % 2115 %.,.,., 80 %. 15 ( ) PAHs. SPM. SPM, 10 % HCl, 3,,, (115 cm 2 ), Π OCΠEC ( ThermalΠOptical OCEC Aanlyzer, Sunset Laboratory Inc, Forest Grove, OR, USA), 3 POC. 1. 2 211
9 : 2387 PAHs 410 3911 ngπl (445 1 089 ngπg), PAHs 216 2616 ngπl (298 1 337 ngπg). 2, (1 6 ) PAHs (7 11 ), (1 8 ), PAHs ( 2),. 2, PAHs., PAHs, SPM,., PAHs.,2 PAHs. 2 Fig. 2 PAH concentrations in particulate and dissolved phases PAHs (1519 18214 ngπl ) (1310 2813 ngπl). 3 :,.,,,,,, PAHs. 2 PAHs (4 : r = - 0179, p < 0101 ; 7 : r = - 0168, p < 0105).,. PAHs PAHs, ( GFF 017 m) PAHs, SPM, PAHs, PAHs. 2 PAHs SPM (4 : r = 0177, p < 0101 ;7 : r = 0186, p < 0101), SPM PAHs. SPM, PAHs ;, PAHs. [ a ] Π (BaAΠChr) PAHs [8 ], BaAΠChr ( : 0129) ( : 0138),. PAHs [9 ] [10 ] [11 ] PAHs ( 2). SPM. PAHs Susquehanna River [12 ] [10 ] [13 ] [14 ] [15 ] PAHs. [16 ] [17 ] [18 ] PAHs. 212 3 PAHs, 3 PAHs PAHs 53 % 94 %, 82 % 94 %,2 5 6 PAHs PAHs 4 %, PAHs. 3 PAHs ( )
2388 29 2 ( PAHs) Table 2 Total PAH concentrations in water for various estuary systems Πng L - 1 Πng L - 1 N 1) 216 3911 1219 18214 15, 0117 5812 2117 138 15 [15] Susquehanna River 22 11 12 130 36 [12] York River, VA Estuary, USA 2109 123 20 [19] 2713 16616 12 430 18 [10] 211 5104 0107 85 18 [10] Raritan Bay Lake Red (Pyrenees) Lake Gossenkglle (Alps) ver Ne dalsvatn(caledoniam) 4168 0123 4178 0155 [13] 36186 2102 37189 4169 [13] 0141 0113 0127 0119 22 [11] 0157 0134 0135 0119 22 [11] 0150 0108 0156 0106 22 [11] 0113 1125 01183 01214 14 [9 ] 0108 01303 01113 01489 14 [9 ] 01049 01258 01300 01594 14 [9 ] 2 687 4 36 11 [14], 4 228 29 325 ( ) 16 [17], 9 900 474 000( ) 16 [16], 989 9 663 ( ) 10 [18] 1) N PAHs PAHs 44 % 80 %,, 34 % 64 % ; 4 PAHs ( [ a ] ) PAHs 16 % 44 %, 5 6 PAHs 4 % 23 %. PAHs, 5 6 PAHs 3 PAHs ; 4 PAHs 3 PAHs ( 3). PAHs,, SPM, PAHs 5 6 PAHs [4 ] ;, SPM,, Countway [19 ],, PAHs ( ), PAHs. 3 PAHs, [20 ],, POC,, 3 PAHs. 213 Π PAHs 3 Fig. 3 Composition of PAHs in particles. Π K p ( K p = c s Πc l, c s :, c l : ) K OC ( K OC = K p Πf OC,f OC : ). K OC, Π ( K OW ). K OC, K p K OC,. PAH
9 : 2389 K p K OC,. PAH K p,, POC SPM K p. 4, (lg K p ) POC (lgf OC ) ( r = 0157, p = 01009) ( r = 0166, p = 01001),, Zhou [17 ] PAHs [21 ], PAHs., Zhou [22 ] Humber, POC ; Brunk [23 ] PAHs, PAHs,., SPM, K p. [24, 25 ]. 4 (c),, PAHs, SPM, K p, Zhou [22 ] Humber. 2, [24,25 ],,,,,. [26 ],,,,,,., SPM,,,,. SPM,,,,,. 4 ( lgf OC ) ( SPM) Fig. 4 Correlation between distribution coefficient (lg K P ) and particle organic content (lgf OC ), sanility, and total suspended particle matter (SPM) 5, 2 PAHs lg K OC lg K OW [27 ], K OC,,. K OC [28 ],, PAHs [29 ].
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