IEG 환경지질연구정보센터

전체 글

(1)]æ~>Æ·~ã²æ. òY. Vol. 9, No. 1, pp. 104~111, 2004. j²R J"* Æ·ö R Æ·^¿8»~ ÏW \. ;9 *ÁRç¢ ÁË 1. 1. 2. 7Ú&v ~ã" *Ê~ :Î&v ÆÏ~ã" 1. 2. Application of Soil Washing Technology for Arsenic Contaminated Soil. Á. Á. Jung-Sung Hwang1 Sang-il Choi1 Min Jang2 1. Department of Environmental Engineering, Kwangwoon Universiy 2 Department of Civil and Environmental Engineering, University of Wisconsin-Madison. ABSTRACT Several tests were conducted to optimize design parameters of soil washing technique for arsenic contaminated tailings and soils. Arsenic contaminated tailings and soils have been sampled from the N mine, Kwangwondo and the K mine, Kyungsangbukdo, respectively. According to the result of sequential extraction procedure, total arsenic concentrations were 21,028 190, 443 7, and 37 3 mg/kg, for mine tailings, dry field, and river sedimentary soil, respectively. The subtotal of weakly bonded and easily releasable arsenic concentrations which were 2,284 100 (10.9%), 151 5 (34.0%), 15 3 (39.5%)mg/kg for mine tailings, dry field, and river sedimentary soil, respectively. Kinetics of arsenic extraction using NaOH showed that arsenic was extracted more than 90% after 6 hours for all samples. The optimized concentration of NaOH were 200 mM for all samples while the optimized dilution ratio were different to have 1:10 (mine tailings) and 1:5 (dry field, river sedimentary soil), respectively. Results of sequential soil washing tests using NaOH showed that arsenic concentrations obtained by Korean Standard Test Procedure were decreased to meet the regulation for both river sedimentary soil and dry field while they were not decreased largely for mine tailings, even though NaOH had much higher efficiencies of arsenic extraction than other extractants.. Û. Û. Û. Û. Û. Û. Key words : arsenic, soil washing, NaOH, sequential extraction method, sequential soil washing. º £ ^. j² J"* Æ·ö & Æ·^¿8»j 'Ï~8 * '~ Ú*j êÂ~¶ þj >¯~& . &ç òº ;öê N7Ö~ 7f ãç§ê K7Ö ~~~ S Æ·" ~Â' Æ·j F;~& . ³ºÂ» þ Ö", j²~ Cïf 21,028Û190(7), 443Û7(S Æ·), 37Û3(~Â' Æ·)mg/kgb Ò~&b, ÖK £~ £² ÏÂ &Ë j²~ ³êº . 4ê ³ºÂö ~ Cïb 2,284Û100[7(10.9%)], 151Û5[S Æ ·(34.0%)], 15Û3[~Â' Æ·(39.5%)]mg/kgb ¾æÒ . >Öz¾Þj Ï *ö V ÏÂ þ Ö", 3&æ Æ· ÎL 'Ï³ê(50, 100 mM)öB 6* ê¦V 90%ç~ j² ÏÂ ÎNj &b, ^¿B~ ' ³êº Î ãÖö & 200 mMî êûjº '' 1:10(7)" 1:5(S Æ·, ~Â' Æ·)& ' î. . >Öz¾Þö ~ ³ Æ·^¿ þ Ö", ~Â' Æ·" S Æ·f ³ Æ·^¿ö ~ ^¿* Æ· Ú~ º j² ³ê& 6²j r > ®îb¾, 7~ ãÖº ~ æz& ìî . *Ú : j², Æ·^¿8», >Öz¾Þ, ³ºÂ», ³ Æ·^¿ *Corresponding author : [email protected] : 2004. 3. 5 : 2004. 3. 22 : 2004. 6. 30. ö%>¢ î~ # Æ~. ²Òß¢ Hæ. 104.

(2) j²R J"* Æ·ö R Æ·^¿8»~ ÏW \ 1.. * V. ÖÒ¾¢öB Æ·J"ö & Ò²' & Ã&>V · Vº 1990j& ê, " ~ã¦~ 7.³ J"ö & »'B ;z ZÁö7Ö" 7.³ J" æ ~ Æ·J" ^Bö & & &v> ® . *Ò Úöº 1910j& ê¦V BB>î~ .³7 Ö 900B²7, 7.³j ï F ZÁö7Ö 894 B²& ÖÒ~ ® . ZÁö7Öf " 7Öÿb '. ~ ì O~B 7ÖöVb(öC 5 ö7)~ F " WÚ FÂ>ö ~~ æ~>, "æ³ãæ 5 ~ ÂÆ· 7.³ö ~ J"> ® . ZÁö7Ö~ 7ÖöVböº F 7.³ j ², Ú, Ò, Ï, >f, j ï F~ ®. . ß® j²º ëW ; ö²7ö ~¾, ¶ê ÚöB ZVb arsenate[As(V)]f arsenite[As(III)], Ò FVb organic arsenic compounds(As-C-)~ ç Ò . ¢>'b ZVj²º jÖ"(Özç)" jjÖ"(~ öç) ; " Æ·" > îÚö Ò~, jjÖ "f jÖ" 25~60V &ï z Fë~ . j²ö & *~ "B Âãº j² J"bîj

(3) ~º Æ·, b, rb S, j²bb~ «, b¦ Â j > ® . Ú F«B j²ö & /Wf b¦, ^ê, ²zVê, ãê V&ö ö ë W ¾æ¾, ¶ Ã^¢ . òW' Â~ ãÖöº z.ö Ê·¾ s ¾æ¾, *Ë~ ¶ç, .&»², >öB~ .·Ï *» ¾æ¾º ©b > ® . $ j²& Ú~ ö, b¦ V&öB zj FBÊº BzW bî rJ^ ®b , j²~ ëWö & 'Ëf æj, ., O&¢, ã Òj, jj " ? æ~> J"ö ~ 'Ë j Af ¾¢ ~ ¢ Û~ rJ^ ® . f ? j²º ' ~ãJ"öb ¦'> ®b, ¢> ' ¾ÒVFº ;z/n;z, ã¾Ò, Æ· CÆ, FÒz, b;z», Æ·^¿» ® . º j² ¾Ò¢ *~ J"B Æ·~ J"¦b¢ ² 6²Ò > ®b, J"bî ·j V*ö *¢ > ®º G" ãBW 5 ÎNW j J VF Æ ·^¿V»j F;~& . Æ·^¿V»f Æ·Ú O > Ú®º J"bîj ^¿B(b, Ö, "V, êWB, O" bî )f Vê' îVKö ~ ÏÂÊº V» . ^¿B Öj Ï, Ôf pHö ~ Nz *çb 1-3). 4,6). 105. Æ·Ú &¦ª~ 7.³ ÏÂ>Ú F' º Â 5 B& ®&b~² B . $, O"bîj Ï 7.³~ ÏÂf ^¿, Æ·Úö 7.³" n;B ç Ozbj ;W~² >Ú >Ïb~ ªÒ& >ú ~æ p º 6 ® . >Ï ç~ j²º 11 ç~ pHöB .³W z>ö WO ~ Úææ p º ©b rJ^ ® . 8¢B, öBº pilot Î~ þö & .j þ ²ª þj Û~ F ' j² ºÂ 5 B¢ * Nv~ öÒ¢ Ï ~V * z>î >Öz¾Þj 'Ï~& . $ j² J"Æ·ö &~ Æ·^¿V» Ú* ãB' ¾Òf ^¿Bö ~~ ÏÂ &Ë j²~ Ò;¢ rj¶ · ºÂÏ ¢ Ï ³ºÂ» (sequential extraction method)j >¯~& . ¢ :û b Æ· ^¿V»~ &Ë 7º Ú* *" ³ ê j 'z ~º Ï'j vî . 2.. þÒò 5 O». òj. þ &ç òº j² J" &kV&(&æ: 15 mg/kg, ¾æ: 50 mg/kg) ." æ ;öê N7Ö~ 7f ãç§ê K7Ö ~~~ S Æ·" ~Â' Æ·j F; ~& . j Æ· 7 «ã «¶ 5 7Ç>î¢ B ê, Æ·~ ¢Wj *~ R& Ú #20(0.833 mm) j Û"~º Æ·òj þö ÒÏ~& . ' Æ·~ V. ßW7 pH, Æ·«¶ &ê(particle density), FÎã(effective size D10), ê>(uniformity coefficient), FV> ï (organic content)f Æ·zªC»ö ~~ >¯~&b, 2.1. 5). 6). 7,8). 9). Table 1. The Characteristics of the soil Measurement Property. Mine Tailings. Dry Field. pH particle density (g/cm3) effective size (D10) uniformity coefficient (D60/D10) organic content (%) CEC (meq/100g). 2.50. 6.18. River Sedimentary Soil 6.66. 1.82. 1.67. 1.82. 0.33. 0.34. 0.26. 6.96. 2.65. 2.31. 3.3. 1.0. 2.2. 21.3. 8.2. 14.2. Journal of KoSSGE Vol. 9, No. 1, pp. 104~111, 2004.

(4) ;9ÁRç¢ÁË . 106. Table 2. Sequential Extraction Scheme for Fractionation of Soil-Fixed Arsenic Step 1 2 3 4 5 6 7. Fraction. Extraction procedure. soluble adsorbed carbonate soil organic matter easily reducible oxides amorphous oxides crystalline minerals. 0.25 M KCl (2h) 0.1 M Na2HPO4 (pH 8, 20h) 1 M sodium acetate (pH 5, 1+4 h), then 0.1 M Na2HPO4 (pH 8, 20 h) 5% NaOCl (pH 9.5, 0.5h boil, repeated once) 0.1M NH2OH (pH 2, 0.5 h) followed by 0.1 M KOH (20 h) 0.25M NH2OH/HCl (0.5 h at 50oC) followed by 0.1M KOH (20 h) aqua regia (HCl + HNO3). ·N ~~Ïï(cation exchang capacity, CEC)f EPA Method 9080[1986]ö ~~ >¯~& . Æ·~ *>' V. ßWf Table 1ö ¾æÚî . 7, S Æ·, ~ Â' Æ·~ .V j² J"³êº Æ·J";þ» ö ~~ G;~&b, '' 984Û16, 141Û4, 17Û1 mg/kgªj r > ®î . ³ºÂ»ö ~R Æ·Ú j²~ Ò ßW k 7, S Æ·, ~Â' Æ·ö &~ j² B Î NW 5 ãB' ¾Ò¢ * j² Ò ßWj C 7ê ~ ³ºÂ»(sequentail extraction method)ö ~~ > ¯~& . $ þ~ ;{ê¢ *~ 7.³ö & * ÏÂ» EPA Method 3050B¢ 3&æ Æ·ö &~ >¯~& . ¢>'b EPA Method 3050Bº 7êö >¯>º aqua regiaö j~ 10~30%;ê z ÏÂ >º ©b rJ^ ® . ' êê þO»f r" ?b, Table 2ö º£ ;Ò~& . 2.2.. 6). j Ï “soluble fraction”~ ºÂ Æ· 2.5 gj 250 ml â'2¢Êö ~ BB 0.25 M~ KClj 25 ml If ê, 2* ÿn v> ~& . Step 2: 0.1M Na HPO (pH8)j Ï “absorbed fraction”~ ºÂ Step 1~ Æ·ö 0.1M Na HPO 25 ml¢ If ê, 20* ÿn v> ~& . Step 3: 1 M sodium acetate(pH5)j Ï “carbonate fraction”~ ºÂ Step 2~ Æ·ö 1 M sodium acetate 25 ml¢ If ê, 5* v> ~& . 3-2. 0.1 M Na HPO 25 ml If ê, 20* ÿn v > ~& . Step 4: 5% NaOCl(pH9.5)j Ï “soil organic matter fraction”~ ºÂ Step 3~ Æ·ö 1 M sodium acetate 10 ml¢ If ê, Step 1: 0.25M KCl. 2. 4. 2. 2. 4. 4. Journal of KoSSGE Vol. 9, No. 1, pp. 104~111, 2004. Nê 70Û0.5 C¢ Fæ~ 30ª* &~& (1² >). Step 5: 0.1 M NH OH(pH2)f 0.1M KOHj Ï “easily reducible oxide fraction”~ ºÂ Step 4~ Æ·ö NH OH 25 ml¢ If ê 30ª* v > ~& . 0.1 M KOH¢ 25 ml If ê 20* ÿn v> ~& . Step 6: 0.25M NH OH/HClj Ï “amorphous oxides fraction”~ ºÂ Step 5~ Æ·ö 0.25 M NH OH/HCl 25 ml¢ If ê, Nê 50Û0.5æ¢ Fæ~ 30ª* v> ~& . 0.1 M KOH¢ 25 ml If ê 20* ÿn v> ~& . Step 7: HCl/HNO ¢ Ï “crystalline minerals fraction” ~ ºÂ HCl/HNO = 30 ml/10 ml ~ Nê 70Û0.5 C¢ F æ~ 1* ÿn v> ~& . C 7ê~ v> f 120 rpmb ~&b, ' êî Æ·Ú º~º j²¢ B~V *~ 0.25M (mol/L) KCl 20 ml¢ If ê, 2ª* z Ú "º · ëj ÷¯~& . ò jº 10 mlO çj ª ~ &b, öªÒ¢ 3200rpmöB 20ª* ê, æ (0.45 µm)¢ Û"Î j ICP(Model : ICPS-1000VI SHIMADZU) ªC~& . o. 2. 2. 2. 2. 3. o. 3. 10). ²ª Æ·^¿ þ ²ª Æ·^¿ þf pilot Î~ þö & .j. þb, ' þî v ¢ Ï~ v>B òº 10 mlO ª ê öªÒ¢ 3200rpmöB 20ª* ~& b, ªÒB f Æ·~ã*»~ V&³ê ' ¦ 6êj * Æ·J";þ»öB Ï>º æ(5B, 0.1 mm)¢ Û"B HNO 1%¢ Î& ê ICP ªC~& . 2.3.. 3. *ö V ÏÂ þ ' Æ· òö &~ >Öz¾Þö ~ j² ÏÂ 2.3.1.

(5) j²R J"* Æ·ö R Æ·^¿8»~ ÏW \. ï;ö ê~º *j rj ~ . ^¿*f Æ ·^¿V» 'Ï jº "º Ú*¶ Ê~ J êf ÎN' Ú*ö 7º~ . 7.³ Bö ÎN'b rJê "Ö 5 citric acid ¢ '' 50 mM" 100 mM 'Ï~ ^¿Ö"¢ >Öz¾Þ" jv~&b Ã~>ö ~ ÏÂ>º j²~ ·ê rj~ . ' *ê(1, 2, 3, 6, 14, 24 hr) çj 10 mLO ª~&b , þf 500 mL â' 2¢Êö 15 g~ Æ·" 300 mL~ ^¿Ïj b ê, Nê¢ 20Û0.5 C Fæ~ 300 rpm~ êû ³êöB 24* ÿn v ¢ Ï ~ êû~& . 11). 12). o. ' ³ê F; þ >Öz¾Þj ³ê 50, 200, 300, 500, 750, 1000 mM F;~ ^¿ þj ~& . ^¿ê º~º j²~ ³êº Æ·J";þO» ö ~~ rj~ . 250 mL â' 2¢Êö 10 g~ Æ·" >Öz¾Þ Ï 200 mL¢ b ê Nê¢ 20Û0.5 C Fæ~ 300 rpmöB 6* ÿn êû~&b, çj 12 mLO ª ~& ªCO»f *öB VF ©" ¢~ .. ³ Æ·^¿ þ >Öz¾Þö ~ ³ Æ·^¿ þ ³ Æ·^¿ þf 3&æ Æ·ö & ^¿ÎNj ËçÒ > ®º Onj Îï~V *~ >¯~&. . >Öz¾Þ 200 mM¢ Ï~ ' Æ·ö & ' êûj 1:10, 1:5, Ò 1:5 ³ Æ·^¿j ~ & . 6* *Ïb ³ Æ·^¿ þf C 5²ö ö >¯~&b, ' ²Nö V¢ ^¿ê º~º j² ~ ·j Æ·J";þO»b ºÂ ê ªC, jv ~& . Nê¢ 20Û0.5 C Fæ~ 300 rpmöB 6* ÿn v v>~& . 2.4.. 2.4.1. o. 3.. 2.3.2. 13). o. êûj F; þ Æ·^¿V»j Î"'b 'Ï~V * ÎN' ãB' êûj(Æ·7ï: ^;Ï ¦b)~ F;f Ö 7º æ> . ' ³ê F; þöB áf ' ³ ê¢ 'Ï~, S Æ·" ~Â' Æ·f êûj¢ ' ' 1:3, 1:5, 1:10, 1:20, 1:30~ j 'Ï þ~& 7 ~ ãÖº êûj¢ '' 1:5, 1:10, 1:20, 1:30, 1:50 ~ &b, Nêº 20Û0.5 C~ Nê Fæ~ 300 rpmö B 6* ÿn v ¢ Ï~ êû~& . 2.3.3. o. 107. þÖ # Æ~. ³ºÂ»ö ~R Æ·Ú j²~ Ò ßW k %, S Æ·, ~Â' Æ·ö &~ j²~ Ò ßW j rjV * ³ºÂ»(squential extraction method). þ Öº Table 3ö B :f ?b, ³ºÂ»ö ~~ ÏÂB j²~ C ·f '' 21,028Û190, 443Û7, Ò 37Û3 mg/kg %& &Ë ¸~ . EPA Method 3050Bf ³ºÂ»ö ~~ ÏÂB j²~ * ïj jL ªC Ö %, S Æ·, ~Â' Æ·~ %JN º '' £ 13%, 16%, 19% ³ºÂ» þ jL ' ;{~² Úrrj r > ®î . ³ºÂ»ö ~ ~ j²~ ª

(6) ³ê¢ , %, S Æ·, ~Â' Æ· Îv 7ê(crystalline minerals)ö Ò~º j²& 18,53Û281(88.1%), 276Û1(62.3%), 20Û0(53.1%)mg/kg~ ³ê ¸² Ò~& . v ® ôf j²~ ïf %f S Æ·~ ãÖ 4ê(soil organic matter)öB ' ' 1,262Û75(6.0%)f 55Û3 mg/kg(12.4%), ~Â' 3.1.. Table 3. Sequential Extraction Concentration for Arsenic in the Soil Step 1 2 3 4 5 6 7. Fraction soluble adsorbed carbonate soil organic matter subtotal easily reducible oxides amorphous oxides crystalline minerals total EPA Method 3050. Mine Tailings mg/kg dry soil 4 0 552 0 466 25 1,262 75 2,284 100 180 9 32 0 18,532 81 21,028 190 24,239. Û Û Û Û Û Û Û Û Û. % 0.0 2.6 2.2 6.0 10.9 0.9 0.2 88.1 100. Dry Field mg/kg dry soil 1 0 46 0 48 2 55 3 151 5 10 1 7 0 276 1 443 7 528. Û Û Û Û Û Û Û Û Û. % 0.2 10.5 10.9 12.4 34.0 2.2 1.5 62.3 100. River Sedimentary mg/kg dry soil 3 1 4 1 5 1 3 0 15 3 2 0 1 0 20 0 37 3 46. Û Û Û Û Û Û Û Û Û. Soil % 6.9 11.6 13.7 7.3 39.5 4.6 2.8 53.1 100. Journal of KoSSGE Vol. 9, No. 1, pp. 104~111, 2004.

(7) ;9ÁRç¢ÁË . 108. Æ·f 3ê(carbonate)~ j² ï 51 mg/kg(13.7%) ¸² Ò~& . ³ºÂ»ö ~ ê7 Æ· j ²~ ÖK £~ £² ÏÂ &Ë ßWj <º ê º 4êræ rJ^ ® . V¢B %, S Æ·, Ò ~Â' Æ·Úö ÏÂ>V Ú j²~ ·f '' 2,284Û100(10.9%), 151Û5(34.0%), Ò 15Û3(39.5%) mg/kg~ ³ê Ò~ ®rj r > ®î . V¢B, ³ºÂ»~ Ö¢ :ûb j²~ WOßWj 2k j² Bö & Î' ¾ÒO» ãBWj J ^ ¿B~ F; >ú~ Î'¢ ©b 6B . 6). ²ª Æ·^¿ þ 3.2.1 *ö V ÏÂ þ *ö V ÏÂ þ Ö, %º >Öz¾Þ cirtic acid¾ "Öö j~ 10~20V, S Æ·f >Öz ¾Þ cirtic acid £ 1.2V;ê Ö>~&b, ~ Â' Æ·f cirtic acid& >Öz¾Þ jÝ~¾. ² Ö^~& (Fig. 1). ~æò, ~Â' Æ·~ ãÖ citric acidf >Öz¾Þ~ ãB' /j J~ >Öz¾Þ ãB'¢ ©b 6B . Ã~> ö ~ j²~ ÏÂ·f 12(%), 14(S Æ·), Ò 6(~Â' Æ·)mg/kg~ ³ê Î ãÖö &~ ©b ¾æÒ . %f S Æ·ö &~ >Öz ¾Þ~ ³ê 50 mM 100 mM~ j² ÏÂ NZj j 3.2.. L~ , .V~ ÏÂ· 50 mM 100 mMöB z ©b ¾æÒb £ 6* êöº j²~ ÏÂ· ~ ¢;~& 90%ç~ ÏÂÎ¢ & . ~Â ' Æ·~ ãÖöê £ 6* êöº j² ÏÂ· ~ ¢;~& . ' ³ê F; þ %~ ãÖöº >Öz¾Þ~ ³ê& 100 mMöB 200 mM Ã&Nö V¢ j²~ ÏÂ /Ï® Ã&>î b, ç~ ³êöBº ÏÂ ÎN jÝ~& (Fig. 2). S Æ· ~Â' Æ·~ ãÖöê 200 mM¢ r j² ÏÂ & ÎNj &b¾, >Öz¾Þ~ ³ê & çb Ã&> j² ÏÂ ÎN ² 6²> º º^¢ & . ^¿ê Æ·~ º~j² ³ê¢ ÚÚ (Fig. 3), %~ ãÖ >Öz¾Þ 200 mM 'Ï ²8(138 mg/kg)j &, S Æ· ~Â' Æ·~ ãÖöê 200 mMöB ²8(21 mg/kg, 4 mg/kg)j ¾æ Úîb ç~ ³êöBê jÝ 8 j & . V ¢B, ãBW ÎNW /öB 3&æ Æ· Îv >Öz ¾Þ 200 mM~ 'Ï '¢ 6>î . 3.2.2. êûj F; þ Æ·^¿V» 'Ï '~ ^¿Ï ³êf êûj¢ Ö;~V *~ ' Æ·ö & êûj¢ æzÊ. 3.2.3. Û. Fig. 1. Arsenic extraction kinetics of arsenic-contaminated soil using NaOH, citric acid, and HCl [mine tailings (a), dry field (b), and river sedimetary soil (c), solution conc. = 50(A), 100(B)mM, dilution ratio = 1: 20, shaking time = 24 hr, temperature = 20 0.5oC, Rpm = 300 rpm]. Journal of KoSSGE Vol. 9, No. 1, pp. 104~111, 2004.

(8) j²R J"* Æ·ö R Æ·^¿8»~ ÏW \. Fig. 2. Arsenic extraction tests of arsenic contaminated soil with various concentrations of NaOH[mine tailings (A), dry field (B), and river sedimentary soil (C), dilution ratio = 1 : 20, shaking time = 6 hr, temperature = 20 0.5oC, Rpm = 300 rpm].. Û. þ Ö", êûj& öö 8¢ 7º ÏÂ³ê~ æ z& ¢;~&b, S Æ·~ ãÖöº ÏÂ³ê& Ã& º >¾ æ æ p~ . ~Â' Æ·f êûj&. öö 8¢ ÏÂ³ê& 6²~& (Fig. 4). Æ·^¿ êûj& ôf ·~ ^¿Ï ²º>Ú ãBW Ôjææ, J"Æ·ö & Æ·^¿Ë~ Ú* ö Ú*&Ò¢ * '~ ^¿Ï êûj¢ Ö;~º © Zí 7º~ . 8¢B 7, S Æ·, Ò ~Â' Æ·ö & ²*~ ¶ Oæ 5 ÎNW" ã B' Gj J êûjº '' 1:10, 1:5, Ò 1:5& '~& . ³ Æ·^¿ þ 3.3.1 >Öz¾Þö ~ ³ Æ·^¿ þ 3.3.. 109. Fig. 3. Remaining arsenic tests of arsenic contaminatied soil washed with various concentrations of NaOH[test = Korean Standard Test Methods for Soil, mine tailings (A), dry field (B), and river sedimentary soil (C), dilution ratio = 1:5, shaking time = 30 min, temperature = 30 0.5oC, solution = HCl(1N)].. Û. >Öz¾Þö ~ ³ Æ·^¿ þ Ö"(Fig. 5), 7, S Æ·, ~Â' Æ·ö &~ Æ·J";þ O»j Ï .V j² J"³ê¢ :ûb 3&æ Æ ·ö & 1N ^¿ '' 104, 29, Ò 3 mg/kg 6²~ £ 90, 80, 82%~ BÎNj &b, 7º C 5Nræ ^¿ Ö" º~º j²~ ³êº ~ ¢ ;~& . S Æ·~ ãÖöº 3N ^¿ê j²~ ³ê& Æ·~ã*»~ ÖJV& ¾æ(20 mg/kg)ö ò>º ³ê(18 mg/kg)¢ &b, C 5N ^¿ê~ ³ê& 8 mg/kg ÖJV& &æ(6 mg/kg)ö &rÚ ³ê(6kg/mg) 94%& ^¿>î . ~Â' Æ·f 1N ^¿ê ³ê & ÖJV& &æ~ ³êö ' ³ê(£ 3 mg/kg) Journal of KoSSGE Vol. 9, No. 1, pp. 104~111, 2004.

(9) ;WÁRç¢ÁË ". 110. Û. Fig. 4. Ratio effect on the soil washing with NaOH [mine tailings (A), dry field (B), river sedimentary soil (C), dilution ratio = (A) - 1:5, 1:10, 1:20, 1:30, 1:50, (B)&(C) - 1:3, 1:5, 1:10, 1:20, 1:30, shaking time = 6hr, temperature = 20 0.5oC, Rpm = 300 rpm, NaOH conc. = 200 mM].. Ò~&b, C 5N ^¿ê~ ³êº £ 1 mg/kg 94% & ^¿ >î . *~ þÖ"¢ « , 7º C 5N ³ Æ·^¿ Ö" 90~92%~ ¾ÒÎNf æ ¾, Æ·~ã*»~ V&öº '~æ p~ . º 7 & ^Æ·b Ò~ jR' V H^ö j ²& ï WO>Ú ®º 'Ë" ê' ºÂ»ö ~ Ö"(Table 3)öB æº :f ? &¦ª~ j²& &Ë ÏÂ>V ÚJÚ ¦ª(crystalline minerals)ö Ò~ V H^ ©b 6B . S Æ·~ ãÖöº ÖJV & ¾æö '~&b, C 5N ³ Æ·^¿ Ö" ÖJV& &æö "7 ³ê¢ & . ~Â' Æ· f 1N ^¿ ÖJV& &æö ' Æ·ªj r > ®î . 4.. Fig. 5. Sequential soil washing of arsenic-contaminated soil using NaOH at 200 mM [mine tailings (A), dry field (B), river sedimentary soil (C), dilution ratio = (A) - 1:10, (B)&(C) - 1:5, shaking time = 6 hr, temperature = 20 0.5oC, Rpm = 300 rpm, sequential soil washing = 5 times].. Û. Journal of KoSSGE Vol. 9, No. 1, pp. 104~111, 2004. Ö V. 1. 7, S Æ·, ~Â' Æ·ö &~ ³ºÂ» ö ~ j² Ò ßWj r j Ö", 3&æ Æ·ö & Cïf 21,028Û190, 443Û7, 37Û3 mg/kgb 7 ö Ò~º j²& &Ë ô~b, Æ·Úö ÏÂ>V Ú j²~ ·f 2,284Û100(10.9%), 151Û5(34.0%), 15 Û3(39.5%)mg/kg Ò~ ®rj r > ®î . 2. 3&æ Æ·ö &~ *ö 8 j² ÏÂ þ Ö ", 6* ê ~ ¢; j² ÏÂ·j &b H j²~ Ï Âïf 90%ç Nj r > ®î . 3. ' ³ê F; 5 êûj Ö; þ Ö", 7, S Æ·, ~Â' Æ·ö &~ ÎNW" ãB' Gj J '~ Æ·^¿ f ³ê 200 mMöB êû j¢ 1:10(7), 1:5(S Æ·, ~Â' Æ·) ~ Ú *~º © '~ 6>î . 4. >Öz¾Þö ~~ ³ Æ·^¿(C 5N).

(10) j²R J"* Æ·ö R Æ·^¿8»~ 'ÏW \. þ Ö", ~Â' Æ·f 1N ^¿ê ÖJV& &æö '~&b, C 5N ^¿ 1 mg/kg dry soil~ ³ê £ 94%& ^¿Nj r > ®î . S Æ·~ ãÖ, 3N^ ¿ ÖJV& ¾æ ö '~&b, C 5N ^¿ 8 mg/kg dry soil~ ³ê& Nj r > ®î . 7~ ãÖ öº C 5N ^¿ ÎN 90~92%&b, ^¿ê º~º j²~ ·f 83~100 mg/kg dry soilb ~ ¢;~&. . 7~ ãÖ ¾Ò ÎNW 'f ©f ÏÂ ¾ >æ pf crystalline mineralsö Ò~º j²~ · ï 6" ^Æ·Ò~ · ôf F 6>î . *~ Ö"¢ « , j² J"B 3&æ Æ·ö & >Öz¾Þ~ 'ÏWf Ö Ö>j r > ®î. . ß® ~Â' Æ·" S Æ·~ ãÖ 'ÏW. ^¿Bö j~ Ö Ö>~æò, j²~ ³ê& ³ê 7~ ãÖöº j²~ ¾ÒÎN ^¿B ö j ç&'b ú~&b¾, º~~º j²~ · Æ·~ã*»ç~ V&~¢ ."~æ ê³ ¾Ò; ö & On jº~ 6>î .. 5.. 5.. 6.. 7.. 8.. 9.. Ò Ò º 2003jê ~ã¦~ N^&

(11) ~ã8FB* Òë \j æöö ~ >¯>îb` ö 6Òãî .. 10.. ^^ò ;Ï~, JBW, Oçö, f;, ·Ò~, ·\, Æ·J"æ ~ &Ò 5 öOn I, ~ã;kï&ö B(RE-07) (2002). 2. ~ã¦, ö.³7Ö Æ·J" ;&Ò(2003). 3. ·Ò, W¢, F&~, ²'V, W&Ï, "~, “Iron-Coated Sand~ ëW 3& j² WOWË”, &~ã²æ, 25(7),. 11.. 1.. pp. 853-859 (2003). 4. Kim, M.J., Ahn, K.H., and Jung, Y.J., “Distribution of inor-. 111. ganic arsenic species in mine tailings of abandoned mines from Korea”, Chemosphere, 49, pp. 307-312 (2002). , , , , , , ,“ , 3(2), pp. 13-29 -”, (1998). Tye, A.M., Young, S.D., Crout, N.M.J., Zhang, H., Preston, S., Bailey, E.H., Davison, W., McGrath, S.P., Paton, G.I., and Killham, K., “Predicting arsenic solubility in contaminated soils using isotopic dilution techniques”, Environmental Science and Technology, 36, pp. 982-988 (2002). Kim, J.Y., Davis, A.P., and Kim, K.W., “Stabilization of available arsenic in highly contaminated mine tailings using iron”, Environmental Science and Technology, 37, pp. 189-195 (2003) Tokunaga, S., and Hakuta, T., “Acid washing and stabilization of an artificial arsenic-contaminated soil”, Chemosphere, 46, pp. 31-38 (2002). U.S. Envionmental Protection Agency, “Arsenic treatment technologies for soil, waste, and water”, EPA/542/R/02/004, (2002). , , , ,“ , ”, 2003 , , pp. 318-321 (2003). Tokunaga, T.k., Lipton, D.S., Benson, S.M., Yee, A.W., Oldfafather, J.M., Duckart, E.C., Johannis, P.W., and Halvorsen, K. E., “Soil Selenium Fractionation, Depth Profiles and Time Trends in a Vegetated Site at Kesterson Peservoir”, Water, Air, and Soil Pollution, 58, pp. 31-41 (1991). Benschoten, B.J.V., Reed, B.E., Matsumoto, M.R., and McGrvey, P.J., “Metal Removal by Soil Washing for an Iron Oxide Coated Sandy Soil”, Water Environment Reserach, 66(2), pp. 168-174 (1994). , , ,“ , 2(2), pp. ”, 53-60 (1997). , , pp. 160 (2002).. Î" Jfã Ú ;Ç¶ ã# WÏ fF ö 7Ö æ~ j²J"ö & öÏR J; ¾ ÆæÏê ¢ J 7"O» Æ·~ã²æ. ¢ö 7R ÆÎ fãë j² J" Æ· ~Â ' > 5 7~ öj * Æ· ^¿ ; BBö & j æ~>Æ·~ã² ºêFBR² æ~ >Æ·~ã². ;ÿÆ æ\ ç¢ 7.³ö ~ J"* Æ·ö & Æ·^¿V»~ 'ÏW Æ·~ã²æ 13. ~ã¦ Æ·J";þO». 12.. Journal of KoSSGE Vol. 9, No. 1, pp. 104~111, 2004.

(12)