So il Geochem ica l Ba seline and Env ironm en ta l Background Va lues of Agr icultura l Reg ion s in Zhejiang Prov ince.

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1 2007, 23 (2) : Journal of Ecology and Rural Environm ent 1, 1, 2, 1 (1., ;, ) 2. :,, 13,,, 52(), : ; ; ; : P632; X8; P59 : A: (2007) So il Geochem ica l Ba seline and Env ironm en ta l Background Va lues of Agr icultura l Reg ion s in Zhejiang Prov ince. WANG Q ing2hua 1, DONG Yan2xiang 1, ZHOU Guo2hua 2, ZHENG W en 1 ( 1. Zhejiang Institute of Geological Survey, Hang2 zhou , China; 2. Institute of Geophysical and Geochem ical Exp loration, Langfang , China) Abstract: Based on the soil geochem ical data obtained during the agricultural geo2environmental survey of Zhejiang Prov2 ince and the basic concep tion of geochem ical background values, the soil geochem ical baseline was divided into 13 statisti2 cal units in light of types of soil parent materials. The three major agricultural regions of Zhejiang Province were fixed as statistical units for soil environmental background values. After repeatedly crossing out anomalous values, mean values, standard deviations and variation coefficients of 52 elements ( or oxides) were obtained, and may be cited as major geo2 chem ical data for formulation of regional soil environmental quality standards, and evaluation and remediation of soil pollu2 tion. Key words: geochem ical baseline; soil environmental background; multipurpose regional geochem ical investigation; Zhejiang Province , ( ),,(X ) 2 (S ),, :X 2S,,, : : R = C V / n ;C V = S /X 100, A C = 100% - R : R, % ; C V, % ; n ; S ; X ; A C, % :R 30%, ; n, 30%, 70%,, 2030,,,,30% : ( ) : ' China Academic Journal Electronic Publishing House. All rights reserved.

2 : (1),, ; ( 2),,,, 1. 2 :, [ 1 ], 1. 3 [ 2 ],,,,,, ( ) (-- ) ( - ), km 2 (DD ), 1 km - 2, 1 ( 4 km 2 ) - 1, 020 cm; 1 ( 4 km 2 ) - 1, 1 (16 km 2 ) - 1 [ 1 ( 16 km 2 ) - 1 ], cm , [ 3 ],, ,,,,,,,, 1,,, (1) , (020 cm ),,, ()()() ()() ()() ()() () () 5

3 2 : 83 1 Table 1Sta tistica l un its of so il geochem ica l ba seline in Zhejiang Prov ince : (:,, ) 144 : : : 74 (: 72 : 55 ) : () 18 : : : : ( ) , 90%, Na 2 O CaO, 70%,, 2, (), (C V < 0. 30) C V > , 676 (52 13) 15% ; C V > , 1% C V < 0. 30, (), C V < Ba Be B i C Cd Ce Ga Ge La L i N Pb Rb Sc , Sn Th U WY Zr A l 2 O 3 SiO 2, ( )Ca ( ) Na ( ) ( C V ) ( ),, F Mo Sb Na,Cl I Sr Ca Na, Co Cr Cu Hg N i P Ti Ca NaCr Mo N i , C V () Na 2 O CaO I Sb P Mn N i F, ,95%,, C V 3, (), > , 6. 2%,

4 Table 2Sta tistica l param eter of so il geochem ica l ba seline in north, ea st and m iddle Zhejiang (144) (152) (420) (329) (74) (72) (55) X C V X C V X C V X C V X C V X C V X C V Ag Au A s B Ba Be B i B r C Cd Ce Cl Co Cr Cu F Ga Ge Hg I La L i Mn Mo N Nb N i P Pb Rb S Sb Sc Se Sr Sn Th Ti Tl U V W Y Zn Zr A l 2 O CaO Fe 2 O K 2 O MgO Na 2 O SiO

5 2 : 85 2Table 2( Con tinued) (18) (247) (540) (51) (27) (21) X C V X C V X C V X C V X C V X C V Ag Au A s B Ba Be B i B r C Cd Ce Cl Co Cr Cu F Ga Ge Hg I La L i Mn Mo N Nb N i P Pb Rb S Sb Sc Se Sr Sn Th Ti Tl U V W Y Zn Zr A l 2 O CaO Fe 2 O K 2 O MgO Na 2 O SiO () : C10-2, Ag Au Cd Hg10-9,10-6

6 Table 3Sta tistica l param eter of top so il env ironm en ta l background in pla in reg ion s of Zhejiang (1 751) (1 124) (328) (276) (477) X X + 2S C V X X + 2S C V X X + 2S C V X X + 2S C V X X + 2S C V Ag A l 2 O A s Au B Ba Be B i B r C CaO Cd Ce Cl Co Cr Cu F Fe 2 O Ga Ge Hg I K 2 O La L i MgO Mn Mo N Na 2 O Nb N i P Pb Rb S Sb Sc Se SiO Sn Sr Th Ti Tl U V W Y Zn Zr () : C10-2, N Ti10-3, Ag Au Cd Hg10-9,10-6

7 2 : , C N P S Se Sn Ag B r Cd Hg Pb 4,( CdHgPb ),, (), 4 Table 4Enr ichm en t coeff ic ien t of elem en ts in top so ils of the survey area s / ( mgkg - 1 ) / ( mgkg - 1 ) / ( mgkg - 1 ) R 1) R R Hg Cd Cr Pb Cr Zn N i A s cm,020 cm; / TiO 2 ) 1) R = ( / TiO 2 ) / ( ,, Cd,Hg N i Cr Zn Cu GB : Cd Hg Pb, A s, N i,4cr ; Zn Cu,,, ( ), 5 Table 5H ighest background va lues of heavy m eta ls in ma2 jor pla in s of Zhejiang mgkg - 1 Cd Hg Pb A s N i Cr Zn Cu ) ) GB ,,,,, ( ),,,

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