ࡱ > q` R h bjbjqPqP 2 : : h [ [ [ [ \ T م ] ^ ^ ^ ^ ^ ^ ^ $ ˆ h 3 Z Xc ^ ^ Xc Xc ^ ^ s s s Xc v ^ ^ s Xc s s s ^ ] !kq [ r s s 0 م s s F s s ( ^ ^ | s 0_ d _ ^ ^ ^ s ^ ^ ^ م Xc Xc Xc Xc E I d I allQ(uv͑ё^\[hQ'`Ջxvz [ \O _f[*m1 H_:_1 TpWS1 HeuQ1 ㉆^g2 sfet2 ] l4 0-NV~4lc4l02 0 0 0 t^ ,{1 2 g 0 0Xd:Nnx[W^al4lvallQ(uǏz-N/f&TX[(W͑ё^\k[|~xvzNBhgW^al4lvall-N͑ё^\yr_TO(ualleTQNT-Nv͑ё^\+Tϑ0xvzhf`$BhgW^al4lvall-N͑ё^\+TϑbVvQNW^euNOa$E D T A cSalle͑ё^\vcSs(W2 3 % ^6 0 % ُR͑ё^\ gS iir8T6eb$all g:g YTHe>fW0e(uall YTNe(uvQNevk;z7T;z-Nv͑ё^\+Tϑef>f]_&{TV[hQ0 0 0sQ.͋all QN)R(u ͑ё^\ 0 0-NVR{|SX 7 0 3 0 0e.shƋxA 0 0ezS1 0 0 0 - 4 6 0 2 ( 2 0 0 0 ) 1 2 - 0 0 1 8 - 0 4 R e s e a r c h o n S a f e t y o f H e a v y M e t a l s i n S l u d g e d u r i n g A g r i c u l t u r a l U t i l i z a t i o n Z H A N G X u e - h o n g 1 C H E N Z h i - q i a n g 1 L U B i n g - n a n 1 C H E N W e n - b i n g 1 X I E Q i n g - l i n 2 W A N G D u n - q i u 2 L I J i n - c h e n g 2 ( 1 . S c h o o l o f M u n i c . a n d E n v i r o n . E n g . , H a r b i n I n s t i t u t e . o f T e c h . , H a r b i n 1 5 0 0 9 0 , C h i n a ; 2 . D e p a r t . o f R e s o u r c e a n d E n v i r o n . , G u i l i n I n s t i t u t e o f T e c h . , G u i l i n 5 4 1 0 0 4 , C h i n a ) 0 0 A b s t r a c t I n o r d e r t o d e t e r m i n e t h e p o t e n t i a l t o x i c i t y o f h e a v y metals in municipal wastewater sludge during agricultural utilization,the feature of heavy metal in the wastewater sludge in Guilin city and the heavy metal contents of agricultural products after sludgefertilizer application are systematically studied.The resultsshowed that:(1) the heavy metal contents of the sludge in Guilin are slightly lower than in other cities in China.(2) The extraction rate of heavy metals ranges from 23% to 60% when the sludge is extracted by 0.1 mol of EDTA,i.e.23% ^6 0 % o f m e t a l s m a y b e a b s o r b e d b y p l a n t s . ( 3 ) T h e f e r t i l i z e r e f f e c t o f s l u d g e i s g o o d . T h e r e i s n o o b v i o u s d i f f e r e n c e o f h e a v y m e t a l c o n t e n t s i n r i c e a n d r i c e s t r a w b e t w e e n u s i n g s l u d g e - o r g a n i c - c o m p l e x - f e r t i l i z e r a n d o t h e r f e r t i l i z e r s o l d i n m a r k e t , a n d t h e h e a v y m e t a l i n a g r i c u l t u r a l p r o d u c t a c c o r d s w i t h t h e n a t i o n a l s t a n d a r d . 0 0K e y w o r d s : w a s t e w a t e r s l u d g e ; a g r i c u l t u r a l u t i l i z a t i o n ; h e a v y m e t a l 0 0=\{W^al4lvallYnel gYyFO[bVُ7h N*NSU\-NV[ ~T)R(u$\vQ/fQN)R(ueu/f}Yv b;1 02 =0NdkTeallQ(u_NX[(W@wN!kalgvS'`ُ;NnNall-N+T g N[ϑv͑ё^\Tuk0uSSO0[ukuSI{ g[ir(0xvzhf (uTvXeleS@gmpall-Nu_uirT[ukuSS NO4xOWall-Nv iir{QRFO͑ё^\+TϑؚvalleNQ0uOƖ-NN iirSOv^ǏߘirNuirv O[N{|Nuk[\O(u0:Ndk|~xvzNBhgW^al4lSallv͑ё^\yr_Nnx[vQQ(u[hQ'`0 0 01 all-Nv͑ё^\bR 0 01 . 1 all-N͑ё^\+Tϑ 0 0BhgW^al4lvall͑ё^\+Tϑh1 0 h1 VQYRW^al4lvall͑ё^\+Tϑ m g / k g CQ } A s C d C r C u N i P b Z n Yl Bhg^ 3 7 0 . 9 5 9 4 1 5 4 9 8 1 9 9 5 0 6 )Y%m~^P[ 1 0 3 7 2 8 3 3 6 6 6 9 1 0 9 5 e.s[ 5 ] ^]'YfWl 1 5 5 0 2 2 0 0 4 6 2 2 4 5 1 7 9 0 e.s[ 6 = -NVQ(uhQ 7 5 7 5 5 2 0 6 0 0 1 0 0 0 2 5 0 5 0 0 1 0 0 2 0 0 3 0 0 1 0 0 0 5 0 0 1 0 0 0 x'`WXp H 6 . 5 -N'`Tx'`WXp H e"6 . 5 ^txQall 5 ^1 5 5 0 ^2 0 0 5 0 0 ^1 5 0 0 2 5 ^1 0 0 0 1 0 0 ^3 0 0 1 0 0 0 ^3 0 0 0 e.s[ 4 ] Rb'YhQ 1 0 2 0 1 0 0 0 5 0 0 5 0 0 2 0 0 2 0 0 0 _V 1 0 9 0 0 8 0 0 2 0 0 9 0 0 2 5 0 0 e.s[ 7 = l Bhg^penc:N4 *N7hTvs^GW