IEG 환경지질연구정보센터

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(1)]æ~>Æ·~ã²æ. òY. Vol. 9, No. 1, pp. 87~94, 2004. «ç9êö ~ JÆ.(o-cresol)~ WO j>' æ;. R5 ÁBÏ~ 1. 2. BÞã&v ~ã¦, & ~ãê 2. 1. Sorption of o-Cresol by Granular Activated Carbon (GAC) and Abiotic Transformation on GAC Surface. Á. Ihnsup Han1 Yong Hwan Kim2 1. Department of Environmental Engineering, The University of Seoul 2 Division of Environmental Science, Shinheung College. ABSTRACT The effects of pretreatment of GAC and dissolved oxygen (DO) on the sorption capacity for o-cresol were investigated using pretreated GAC under oxic and anoxic conditions. Virgin GAC was used with pretreated GACs by O2, acid and base as sorbents. Sorption capacity of GAC was dependent on the oxygen conditions according to the pretreatment methods. Virgin GAC showed increased sorption capacity when DO was present in the solution, while O2-pretreated GAC did not show any considerable capacity change. Acid- and base-pretreated GACs were relatively more influenced by presence of DO as compared with virgin GAC. Both acid and base-pretreated GACs showed a rapid sorption rate at the initial stage, but as contact time became longer the sorption was slower. Sorbed o-cresol was extracted with micro-Soxhlet extraction apparatus using the GAC separated from the rate experiments. Within 1 hour both acid and base-pretreated GACs showed the decrease in extraction efficiencies under both oxic and anoxic conditions. After 1 hour such a trend (the increase as contact time was longer) was not observed and showed relatively constant efficiencies of 35~50%. According to the results of this study O2 contacted with GAC before sorption as well as DO present in the solution during sorption could influence the GAC sorption capacity. Key words : GAC, o-cresol, pretreatment, oxic condition, anoxic condition. º £ ^. b7~ o-cresolj OÁB H b *¾Ò GAC~ OËj Ò~ B>º æ;>wj &V ~ *¾Ò 5 ö 8 ÏÖ²& GAC OËö ~º 'Ëj Ò~& . *¾Ò¢ ~æ pf ö GACf Ö², Ö 5 "V *¾Ò GAC¢ OB ÒÏ~& FÖ² 5 ZÖ²j 'Ï~ þj >¯~& . o-Cresolö & OËf GAC *¾ÒO»ö 8¢ b7~ ÏÖ²ö ~ ² 'Ëj A~ . ¯ ö GAC~ ã Ö Ï7ö DO& Ò ãÖ GAC~ OË Ã&~&b¾ Ö² *¾Ò GAC~ ãÖ DO Ò¦f Z& ~² ê OË~ æz& &V>æ p~ . $ Ö¾Ò 5 "V¾Ò GACº ö GACö j ç&'b DO~ 'Ëj ² Af ©b &V>î . Ö¾Ò GAC 5 "V¾Ò GAC Îv .Vêö ² o-cresolj O~º ©b &V>îb 7/* ^Úî> ç&'b 6N O ¶Jr . ¾ Ö¾Ò GAC~ ãÖ £ 5¢ ï;ö ê~&b¾ "V¾Ò GACº 10¢ ç 7/~¢ò ï;ö ê~º ©b &V>î . O³ê. þöB &V 6ö ªÒB GAC¦8 ²; soxhlet ÏÂV¢ Ï~ OB o-cresolj ÏÂ~& . .V £ 1*Úö v (Ö $º "V¾Ò GAC ÒÏ) ÎvöB ÏÂN 6²~º ãËj ¾æÚî . £ 1* êöº ÏÂN~ 6² $º Ã& ãË &V>æ p~b ç&'b ¢; ãËj ¾æÚÚ £ 35~50%~ ÏÂ Nj ¾æÚî . þÖ"ö 8 O 7 Ïö Ò~º ÏÖ²º b &çbî O*ö GAC f 7/Î O ê GAC OËö 'Ëj ~º ©b &V>î . *Ú : «çWê, o-cresol, *¾Ò, FÖ², ZÖ² 2. *Corresponding author : [email protected] : 2004. 1. 30 : 2004. 3. 22 : 2004. 6. 30. ö%>¢ î~ # Æ~. ²Òß¢ Hæ. 87.

(2) R5ÁBÏ~. 88. 1.. * . Wê(activated carbon; AC)f ç> 5 ~Áö>¾Ò ö 'Ï>Ú FÁZV J"bîö & OBB 6Ò ÒÏ>Úz . Wêf «¶~ ;ö V¢ «çWê (granular activated carbon; GAC) 5 ªöWê(powdered activated carbon; PAC)b &ê>, GAC& 6Ò ÒÏ> ® . GAC O;j 'Ï~ b 7ö Ò ~º ß;J"bîj ãB' Î"'b B~V * Bº ¾Ò&çzb~ OßW 5 O¾Ò~ ~ã " ¾Ò &ç>~ bÒz' W Oö ~º 'Ëö & & F¯>Ú¢ . "¾ö Ú GAC Oº ¾Ò;7~ z' 5 b' æ;>wb &

(3) Îjæ ® . æ;>wf O~ã 5 'Ï>º zb~ bÒz' ßWö V¢ ¢ æº, &çzbö & GAC OËj Ã&Ò > ®b >& 6²Ò >ê ® . $ GAC Ò ê ÒÒÏ Gj J æ;>w Wê~ ÒÒÏN ($º >«)ö 'Ëj ~² B . çö Ò~º Ö²(¯ DO) $º VÚ Ö²& GAC f 7/~² >, GACº Ö²¢ O~ Rö ÖW ·ÏV¢ ¦ª'b ;W~, Ö" GAC R~ z ' Wî :2² B . DO& Wê Rö O~ ² > ÖzW ·ÏV& ;W>Ú GAC~ R W Ã&~, V¢B Wj &ê zb~ ãÖ, ·ÏVf Ïî~ ç^·Ïö ~ OË Ã&>¾ 6²~² B . >ö Wj æ pº zb~ ãÖ, OË 6²~² B . DO Ob ¢V>º GAC R~ z ' Wî~ æzº j'b FV 5 ZVW J"bî ö & O ßWö 'Ëj "² B . GAC~ ß; R ·ÏVº Oö jî¢ O ~ z' >wj Û~ ç~ J"bî" F' b >w~ ß® DO $º ÖzW bî Ò ~º öBº F' >wW æ² B . .¢. , ¾¦ê zb~ ãÖ DO& Ò~ GAC Rö B ÖzW Ö(oxidative coupling) $º 7>wj ¢ bÊº ©b > ® . Û ¾¦ê zb Öz~² > ''~ ¾¦ª¶($º ·ÏV)¦V >² ö¶& B>Ú 7* ê~ ¢:¢j ;W~² >º. 7* ê~ ¢:¢f >Ö >wV~ ortho- $º para- *~ö ê²-Ö² êö ~ Ö~² B . ¾¦ê zbf >wê~ ~ã~ 'Ëj Aj z ', 7z', b' 5 bÒz' >wj Û~ 1-3). 4). 4). 5,6). 2). Journal of KoSSGE Vol. 9, No. 1, pp. 87~84, 2004. æ; B . GAC¢ FV J"bî~ Bö ÒÏ r ÖzW Ö $º 7>wö ~ Ò >F> GAC OË~ 6²& væ² ¾æÆ > ® . º ÖzW Ö $º 7>wj Wê R~ Ö¶ Ò& ' 5 z' O»b j*® Ò~º © ® &Ë~V r^b > ® . ö¾~ J"bî O; 7 æ;>Ú ëW OW ·f Wb :: ãÖ O;j bf *® ^B¢ Ú

(4) ~² B . Æ·ö $º ç> 5 ~Áö> ¾Òö GAC ¢ ÒÏ~¶ röº O>w V· 5 >wj BÚ~º ~ã¶ö &~ Úê' & jº~, êö¢ Î"' ' GAC O¾Ò;j BB > ® . $ J"bî~ O 5 æ;";ö & >wV· «{~² «> îO 5 Ò j

(5) O ;j B*Êº ôf 6 ®² B . æ öBº b 7~ FVJ"bîj OÁ B r b *¾Ò GAC~ OËj Ò~ B>º æ;>wj &V~ *¾Ò 5 Ï Ö²(dissolved oxygen: DO)& OËö ~º 'Ëj Ò~¶ ~& . 7,8). 2.. þÒò 5 O». ¾Òçz> # þ Òò ¾Ò&ç J">îB Aldrich Ò~ o-cresolj êê~ ;B ì ÒÏ~& WOB Filtrasorb 400 GAC (Calgon Carbon Corp., USA)¢ ÒÏ~& . o-Cresolf p- 5 m-cresolö j Wê WO 7 z' æ; Ï ~² B~º ©b >Ú ¾Ò&ç>î F ~& . Wêj 2ê~ Úî~ ¢;V~ «¶ V( R&Ú #80Ü100)¢ áf ê ²«¶¢ B ~V *~ îN>¢ Ï~ .r2 ^¿ ê , ÒÏ *ræ ê&ö 8ö &~& . Væ Î >Ï" òº &{ ¾ÒB îN Ã~> (distilled, deionized water; DDW)¢ ÒÏ~ &j~&. . NWO 5 ³ê þö ÒÏB o-cresol Ïf NaCl 0.05 M~ N;ê .~ &j~& . Î .¶V 5 ÏVº 4N HNO Ïö 24* ç & ¹f ê DDW ^¿~ ÒÏ~& . 2.1. 3,5,6). 3. ~ *¾Ò ªêÁÚîê ^¿ÁB Calgon CarbonÒ~ F400 GAC¢ r O»ö 8¢ O , Ö 5 "V *¾ 2.2 GAC. 2.

(6) «ç9êö ~R JÆ.(o-cresol)~ WO j>' æ;. Ò~ ö GAC(virgin GAC)f þ þö ÒÏ~& . 1) ö GAC: êê~ *¾Ò ì ^¿Áê~ GAC ¢ & ÒÏ~& . 2) O ¾Ò GAC: îïV&b ö GAC 10 gj 500 mL DDWö I Bê Ö²&Ê¢ ÒÏ~ ¢; Fï(50 mL/min)b 6*

(7) V ê "~& . ê 500mL DDW 2² ^¿(1² ^¿ 5ªÒÏ) ê. "~ ~ ê&ö 8ö &~& . 3) Ö 5 "V¾Ò GAC: îïV&b ö GAC 10 gj 1N HCl(Ö¾Ò) $º 1N NaOH("V¾Ò) 200 mLö I 24* 7/Î ê "~& . Ú 300 mL DDW 5² ^¿(1² ^¿ 5ªÒÏ) ê "~ ~ ê&ö 8ö &~& . 2. NWO þ GAC~ WOËj 2k~V * 250 mL j*b ²ª >wV(completely mixed batch reactors; CMBRs)¢ Ï~ N(22Û2 C)öB NWO þj >¯~& . bWOB .V³ê¢ 1.3 mM(140Û0.5 mg/L) 5 13 mM (1400Û10 mg/L) .~&, GAC~ 4ïj 0.012.00 g/L æzÊB þ~& . >wVö jòê Î Ïf &Þj ÒÏ~ >Ï~ îïj /;~ ¦ b ~Ö~& o-cresol V 7b F >º ©j O æ~V *~ Â÷" RÒö n * ì j* ~² jòæ teflon z+B Â÷j ÒÏ~ &/~&. . CMBRs j ²* v>VöB ï;ö ê r ræ 14¢ ÿn v>~& . NWO þf ZÖ²(~0.04 mg/L~ DO) 5 FÖ²(êê~ *' DO ³ê . ì 4.6Û0.5 mg/L) öB >¯>î . ZÖ² ö B~ þö ÒÏF .B>º DDW¢ î²&Ê ² 24*ç

(8) V~ DO~ &¦ªj B~ anaerobic glove box TZ ê î²&Ê 2* ç

(9) V ~ &j~& . GAC¢ 4~æ p ¾Ò&ç zb òj If >wV¢ blankB &j~ >wV 5 Væ ºö ~ ¶ 5 zb~ æ;j 6¦ > ®ê ~& . .;B 7/*(14¢) êö GAC¢ öªÒ~ ¢;ï~ çû>¢ ~ çöB~ o-cresol~ ³ê ¢ G;~& . çöB Ò¢ê ·f Îv ç ¯, W ê Rö WOB ©b bî>æ¢ &;~ NWO j ~& . 2.3.. o. WO³ê þ # Soxhlet ÏÂ þ NWO þöB ÒÏ ©" ÿ¢ j*b ²ª 2.4.. 89. >wV¢ ÒÏ~ WO³ê þj >¯~& . NWO. þöB ZÖ² 5 FÖ²öB~ WOË~ N& ² ¾æÂ GAC¢ F~ FÖ² öB þj >¯~& . Soxhlet ÏÂ þö ÒÏF Ïª ·~ GAC¢ áV * 250 mL >wVö 13 mM~ o-cresol Ïj I GAC¢ 0.500 gj 4~& . ç~²* v >V¢ Ï~ ¢;*j 7/Î ê 6öB >wV¢ v>V¦8 ªÒ~ GAC¢ "ÁªÒ~ 7~ o-cresol ³ê¢ G;~& . 6 çb¦ 8 ªÒ GAC¢ soxhlet ÏÂ þö ÒÏ>î . o-Cresol"~ 7/* '' GAC ò¢ FV ÏB(methanol 5 methyl chloride)¢ Ï~ .²; soxhlet ÏÂV(Ïï 50 mL)¢ ÒÏ~ ÏÂ~& . Ï " ªÒB GAC¢ methanol 24* ÏÂÎ ê. methyl chloride 24* ÏÂ~& . Methanol 5 methyl chloride ÏÂÎ j '' 30 mL ¾ ê v Ïj b~ ªCö ÒÏ~& . ÏÂB ò~ ¢ ;ïj ~ '. ªCO»j Ï~ Ò~º z bj ªC~& . ªCO» >Ïç~ o-cresol ³êº HP 8452 Diode-Array Spectrophotometer¢ Ï~ 268 nmöB W7ê ªC ~&b, GAC¦8 ÏÂÎ òº GC(Hewlett Packard, HP5890 Series II) 5 GC/MS(Hewlett Packard 8000 Series & VCT Autospec(Fison))¢ ÒÏ~ ªC ~& . GAC~ *6(point of zero charge; pzc)f - ï ;O»j ÒÏ~ G;~& . .V pH¢ ² . 0.1 M NaCl Ï 50 mLö B GAC 0.20 gj 4 ~ 60*ÿn 7/Î ê GACf Ïj ªÒ, pH¢ G;~ æz& ìº Ï~ pH¢ GAC~ *6 pH Ö;~& . 2.5.. 3.. Ö # 8. NWO þ Wêj ÒÏ~ b 7ö Ò~º o-cresolj WOÁ ¾Ò~¶ r WO 5 Wê~ *¾Ò& WOö ~º 'Ëj ï&~& . Ö 5 "V *¾Ò GAC (~ '' Ö¾Ò GAC 5 "V¾Ò GAC) 5 O

(10) V~ &j GAC(O ¾Ò GAC), *¾Ò¢ ~æ pf GAC(ö GAC)¢ ÒÏ~ b 7ö Ò~º o-cresol B 3.1.. 2. 2. Journal of KoSSGE Vol. 9, No. 1, pp. 87~94, 2004.

(11) R5ÁBÏ~. 90. Fig. 2. o-Cresol Isotherm of O2-pretreated GAC.. Fig. 1. o-Cresol Isotherm of virgin GAC.. þj >¯~& . FÖ² 5 ZÖ² öB Ï ~ pH¢ Îv 6.0b .~ ''~ GACö &~ NWO þj >¯~& . þöB áÚê Î N WO þÖ"º Freundlich NWOb '.~² R *>î (R >0.8). ö GAC¢ ÒÏ~ FÖ² 5 ZÖ² öB >¯ þ Ö"¢ Fig. 1ö ¾æÚî . Fig. 1öB º :f ? o-cresolö & GAC~ WOËf DO~ Ò¦ö V¢ æz~& . ¯, Ï 7ö DO& Ò ãÖö o-cresolö & GAC~ WOË Ã&~ & . .¢ 5 mM~ çï;³ê¢ V&b ÚÚ FÖ²~ GACº ZÖ²~ GAC ocresolj WO · £ 25% ©b &V>î . Freundlich NWOç> 7 (1/n)~ 8 ZÖ²öB ç&'b ·bæ(Table 1 ^) çï;³ê ¯, W OB ·f Ôf çï;³êöB N& z× Ã&~&. . .¢ 0.1 mMöBº FÖ²~ WO· £ 40% ©b &V>î . þöB &VB FÖ² " ZÖ²öB~ WOË~ Nº Vidic &V Nf jv~ ç&'b ·f 8j ¾æÚî. . ¯ ~ Ö"öB WOËf £ 2.8V~ 2. 5,6). Ã& ãËj &b¾ þöBº £ 1.3V~ Nò j ¾æÚî . Wê~ *¾Ò& GAC~ o-cresol WOËö ~º 'Ëj ï&~V *~ O ¾Ò GAC(O -pretreated), Ö ¾Ò GAC(acid-pretreated), "V¾Ò GAC(base-pretreated) ¢ ÒÏ~ NWO þj >¯~& Ö"¢ ö GAC(virgin-GAC)f jv~& . Fig. 2ö O *¾Ò GAC¢ ÒÏ~ >¯ FÖ² 5 ZÖ²öB~. þÖ"¢ ¾æÚî . O *¾Ò GAC~ ãÖ, ocresolö & ö GAC~ WOßW"º ãËj &. . ¯ £ 2 mM~ çï;³ê¢ V&b ÚÚ O *¾Ò GACº Ôf ³êº*öBº FÖ ²öB WOËj & 2 mM ¸f çï ;³êº*öBº ZÖ²öB WOË ©b ¾ æÒ . ¾ Fig. 2~ þ Ö"¶ò~ Úö" Table 1~ OËê>~ JNº*¢ ÚÚ DO~ Ò¦f ² &N ìº ©b C > ® . DO& Ò~º öBº ¢N~ >wb ;W B «~~ ¢:¢(radical) ¾¦zb~ Ö>w ö &~º ©b >î . ¾¦f DOf ç7 > 2. 2. 2. 2. 2. 3). Table 1. Freundlich isotherm equation parameters for o-cresol* KF [(mmol/g)(L/mmol)1/n] oxic 1.316 (0.023) virgin anoxic 0.997 (0.009) oxic 1.268 (1.010) O2-pretreated anoxic 1.189 (0.012) oxic 0.618 (0.007) Acid-pretreated anoxic 0.435 (0.004) oxic 1.600 (0.004) Base-pretreated anoxic 1.185 (0.010) *Numbers on the parenthesis are the standard deviation of the data. GAC type. isotherm type. Journal of KoSSGE Vol. 9, No. 1, pp. 87~84, 2004. 1/n 0.105 0.206 0.120 0.206 0.211 0.136 0.190 0.163. (0.009) (0.004) (0.007) (0.006) (0.006) (0.010) (0.005) (0.005). R2 0.814 0.952 0.826 0.880 0.898 0.807 0.900 0.905.

(12) «çR9êö ~R JÆ\.(o-cresol)~ WO j>' æ;. w~ ¾¦.Þ ¢:¢ (phenolate radical; PhO·)" HO · ¢:¢j ;W > ® (>w (1)). $ Ï~ pHö V¢ ¾¦ Nz ¾¦.Þ Nê DOf > w~ ¾¦.Þ ¢:¢ 5 HO · ¢:¢j ;W > ® (>w (2)-(4)). ¢N~ >wö ~ ;WB ¾¦.Þ 5 HO · ¢:¢f ¾¦ª¶f >w > ® . ß® HO · ¢:¢~ ãÖ ¾¦" >w~ ¾¦. Þ ¢:¢" "Öz>²¢ W (>w (5)). ;WB "Öz>²º r" ? ¾¦ª¶f >w~ ¾ ¦.Þ¢:¢ 5 HO · ¢:¢j W (>w (6)2. 2. 2. 2. 2. (7)). (1) PhO· + HO · PhOH + O PhO + H (2) PhO + O PhO· + O (3) (4) O + H HO PhOH + O · PhO· + H O (5) (6) PhOH + H O PhO· + H O + HO· PhOH + HO· PhO· + H O (7) >w f ¢>'b NÁ{ ~öB ¢Ú ¾º ©b >îb¾ Özæª, Özj ~ 7>î FWª ~ '. / & Ò~ NÁ &V{ ~öBê ¢ÚÆ > ®º ©b > ®. . þ" ? GAC R / ·Ï~² > DO& Ò~º FÖ²öB NöBê ¢:¢ WF > ®b V¢B NÁ&V{ öBê Öz W Ö>w ê¯F > ® º > ® . FÖ² öB ;W>îj ¢:¢ f > 7ö Ò~º êÖ N 5 7êÖN ¯ ¢:¢~ Ê¶n& j ~º Nö ~ ²F > ®bæ W>º ¢: ¢j ;ï~Vº Ï~æ p . $ O *¾Ò GAC~ ãÖ GAC Rö ÖW Öz·ÏV& Ã&~² > V¢B FVbö & OßW æz~²B . DO ¢ O GACº RW Ã&>Ú FVÏî~ W 5 Nzö V¢ OË Ã&~Vê ~ >& 6² ~Vê . Ö DO~ Òö ~ GAC~ OË ~ æz .Gf Ö Ç J«j jº ~²B . O *¾Ò GACº ö GAC OË ² 6 ²~&b¾ Fig. 2¢ ÚÚ DO~ Ò¦ö V¢ OË~ æz& Ö ·rj r > ® (Table 1 ^). PhOH + O2. 2. −. 2. −. − 2. +. − 2. 2. +. 2. 2. 2. 2. 2. 2. 2. 2. 6). 2. 91. 6*ÿn

(13) V ©ö ~ GAC R o-cresol O *ö O

(14) z>îbÒ¢ 6 > ® . V¢B FÖ²öB þÏ 7~ DO& GAC R ~ ßW æzö ê 'Ëj "æ á~æ ö GAC~ ãÖf jv~ FÖ²~ OË" ZÖ²öB ~ OË ² æ pf ©b 6B . O *¾Ò GAC& OËf ö GACf jÝ O Ëj FÖ²öB~ þÖ"fº Ò ZÖ² öB ö GAC~ OË. ² OËj & . ¯ O *¾Ò GACº þÏö "«>V *ö Ïª DO¢ O ç OB DO 7~ ¢¦ & ZÖ² þ 7ö Ï 7b îO>Ú Ôf ³ êZ ~æò o-cresol~ ÖzWÖ($º 7)>wö & > ®b, $º ^¿ 7öº îO>æ pf DO& GAC¢ / ~ GAC RçöB ¾¦" Væ bî " >w~ ¢:¢j ;W >ê ® . V¢B O *¾Ò GACº ZÖ² O 7ö ²* DO~ ' Ëj A~b V¢B ö GAC OËj º ©¢ º > ® . Ö $º "V *¾Ò GAC¢ ÒÏ~ >¯ O þÖ"¢ Fig. 3ö ¾æÚî . Öb *¾Ò GAC 5 "V *¾Ò GACº ö GACf jv~ DO~ Ò ¦ö V¢ '' ç OË æz¢ &. . º ö GAC 5 O , Ö 5 V¾Ò GAC~ * 6 pH& æzB ;êf ² Z&~æ pf ©b ê (Table 2 ^). O ¾Ò GACº ö GAC~ pzcf jv~ £*~ *6 pH~ æz& ®îb $ OË~ æzê Ö 'î . ¾ pzc& ² Ôjê Ö¾Ò GACº FÖ² 5 ZÖ² ÎvöB OË ² 6² > pzc& ² ¸jê "V¾Ò GAC º æ FÖ²öBò OË Ã&~& . ö GAC f jv~ Ö¾Ò GAC~ o-cresol OËf DO~ Ò¦f Z&~² öB ² 6²® º ©j r > ® . .¢ , FÖ²~ ãÖ Ö¾Ò GAC º 1 mM~ çï;³êöB ÿ¢ Ö²~ ö GAC ö OB · 50% ç 6²B ·~ o-cresolj O2. 2. 2. 2. 2. 2. 2. Table 2. Points of zero charge (pzc) of the virgin and pretreated GACs. 2,4). 2. Type of GAC virgin O2-pretreated Acid-pretreated Base-pretreated. pzc 9.6 9.1 3.4 11.7. Journal of KoSSGE Vol. 9, No. 1, pp. 87~94, 2004.

(15) 92. 5ÁBÏ~. N;ê

(16) > $ O¶Ò¢ ¹ ¾Ò&ç bî" ãçO~º Î bî F > ® . ¯ O" &N Î 5 bî GAC~ R ß Wj æzÊ V¢B GAC~ OßW æ~² > Ö OË ¢æ² B . GAC¢ *¾Ò~² > ¯, þ~ ãÖ ö GACf jvB O ¾Ò GAC, Ö 5 "V¾Ò GAC~ ãÖ¾" R·ÏV& æz> V ¢B OË æz>º ©b 6B . OË .B GACº Ò~ ÒÏ~² >º Òj r 'Ï~º O»ö V¢ GAC& º OË" ÒN ¢æ $ DOö ~ 'Ëj A º ;ê& ¢ > ® . O 7ö >Ïö Ò~º DOf z®Ú ÒB ê~ DO³êê OË 5 ÒNö 'Ëj ~² B . $ O&Ë æ6j v ¾Ò &çbî" ãçj ~º Ïî(Oãçbî)ê DO³êö V¢ OËö ;ê ¾Ò &çbî jò Oã çÏîö 'Ëj ~² B . 2. 7,8). WO³ê # Soxhlet ÏÂ Ö 5 "V *¾Ò GAC(«ã: ] R&Ú #80Ü 100)¢ ÒÏ~ FÖ²öB WO³ê þj >¯~ & . .V³ê 13 mM~ o-cresol Ï 250 mLö GAC ¢ 0.500 gj 4(¯, 2.000 g-GAC/L-(o-cresol solution)) ~& êê~ Nê . ì NöB FÖ²~. þj >¯~& . Fig. 4 5 5ö o-cresol WO³ê 5 ÏÂÎN þÖ¢ ¾æÚî . Ö¾Ò GAC 5 "V¾ Ò GAC Îv .Vêö ² o-cresolj WO~º © b V>îb 7/* ^Úî> ç&'b 6 N WO ¶Jr . .¢ Ö¾Ò 5 "V¾Ò GAC º WOF > ®º o-cresol ³ê(.V³êf ï;³ê~ N)~ £ 80%¢ £ 20* Úö B~& . ¾ 7/* ^Úî> v GAC~ WO ·ç ² ¾æÒ . Ö¾Ò GAC~ ãÖ £ 5¢ ï;ö ê~ &b¾ "V¾Ò GACº 10¢ç 7/~¢ò ï;ö ê~º ©b V>î . Ö¾Ò GAC 5 "V¾Ò GAC~ WOßWf NWO þöB áÚê Öf F Ò~² ¾æÒ . Ö¾Ò GAC~ ãÖ £ 70% B>Ú ï;ö ê~& ÿ¢ Ïï GAC ·j ÒÏ "V¾Ò GACöBº ï;öB £ 85% ç~ BN V>î . B~ \¶ f BB >~ ÏÂ þj >¯ ~ Ö²¢ j ÖzB& Ò~º öB 50% ò~ ÏÂ ÎNj áî. . ®Ïª ÏÂ Î 3.2.. Fig. 3. Freundlich Isotherm (a) Acid-pretreated and (b) Base-pretreated GACs.. O~& . ZÖ²~ ãÖ 1 mM çï;³êöB GACö OB ·f Ö¾Òö ~ ö GAC OË~ æ 45% òj &V > ®î (Fig. 3(b)). $ Ö¾ Ò GACº ö GACö j ç&'b DO~ 'Ëj ² Af ©b &V>î . ¯, ö GAC~ ãÖ FÖ² öB £ 1.25V Ã&~º ©ö > Ö¾Ò GAC OËf ZÖ²ö j FÖ²öB £ 1.5V Ã& ©b &V>î . Öb *¾Ò GACö ~ OB ·f ö GAC~ OË ² 6² > "V *¾Ò GACö ~ OB ·f ² Ã&~& . Fig. 3(b)ö FÖ² öB "V¾Ò GAC~ NO þÖ"¢ ¾æÚî. . 1 mM~ çï;³ê¢ V&b ÚÚ "V¾Ò GACö ~ OB ·f ö GACö j FÖ² 5 ZÖ²öB £ 20% Ú~ OË Ã&& &V> î . GACº >Ï 7öB 7~º ~ã' ö ~ ¾Ò(O)&çbîö & OË æ~² B . r ~ã" 7~º 6f O *~ *" O ¢ Ú¾º * Ò Oj Þ ê~ * Îv¢

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(18) «ç9êö ~R JÆ\.(o-cresol)~ WO j>' æ;. ~& . .V £ 1*Úö Ö $º "V¾Ò GAC Ò Ï v ÎvöB ÏÂN 6²~º ãËj ¾æÚ î . £ 1*êöº ÏÂN~ 6² $º Ã& ãË V>æ p~b ç&'b ¢; ãËj ¾æÚÚ £ 35~50%~ ÏÂNj ¾æÚî . B~ WO³ê þ öBº ZÖ²~ þÖf jL~ FÖ²ö B~ WO ï;ö ê~º * ^îb ï;ö ê ~º * Z ¢> ÏÂÎN ç&'b · f ©b >îb¾ ÿ¢ DO öB >¯B . þÖº ç Ö¢ ¾æÚî . ¯ Ö¾Ò GACf jL~ "V¾Ò GAC& ï;ö ê~º * R ^îb¾ v GAC Îv .V~ 6² ãË êö jÝ ÏÂÎNj ¾æÚî . ¢ Væ æ;B bîj ª C~V * ÏÂ~ GC/MS~ ªCÖ( ¢^ö ¾ æÚæ pr)f jL~ J«~, *6 pH~ 6ö B GAC R~ *V' ßWö V¢ *~ ãö V Ö¾Ò 5 "V¾Ò GAC Rö O>º · 5 ³ê&. v GAC ÎvöB ;ï &Ë ;ê~ æ;b î ÏÂ>æ pf Öf ¢~j r > ® .. Fig. 4. rate and extraction efficiencies of o-cresol.. 4.. Fig. 5. Rate and extraction efficiencies at the initial stage.. N n£ >î>æ& æ.ræ GAC RöB B> º ¾Ò &ç >î~ z' æ; >wö & ;{ ;¢ áæ á~² ~º öî . F-400 GACf ocresolj ÒÏ~ WO³ê þj >¯ Vidic f 7 /.V 12*ræ DOö ~ 'Ëj Aæ p~b ê DO¢ VB ZÖ²öB ² ï;³êö ê ~& (1¢ Ú) DO& ¢;³ê Ò~º FÖ² öBº £ 12¢ æ¾B ï;ö ê~ WO³ê& DO~ 'Ëj Aº ©b ~& . \¢ ocresol methyl ·ÏV~ ~~*~& m-cresol pcresolj ÒÏ~ NWO 5 ºÂ($º Ò) þb {Ë $ \öB Vidic f ·ÏV~ ~~ * ~ö V¢ DO~ 'Ëj ² Aº º ©j C&Úî. . ¯ WOî GACö WOF r WOî~ bÒz' ßW DO~ 'Ëj ² A² ~& . WO³ê þöB V 6ö ªÒB GAC¦8 ² ; soxhlet ÏÂV\¢ Ï~ WOB o-cresolj ÏÂ 5). 6). 93. º£ # ÖV. FVJ"bîö & b *¾Ò GAC~ OËj Ò~ B>º æ;>wj V~ *¾Ò 5 ö V ÏÖ²& GAC OËö ~º ' Ëj Ò~& . o-cresolö & *¾Ò¢ ~æ pf ö GACf Ö², Ö 5 "V *¾Ò GAC¢ OB ÒÏ~& FÖ² 5 ZÖ²j 'Ï~ þj > ¯~& . o-Cresolö & OËf GAC *¾ÒO»ö V¢ b7~ ÏÖ²ö ~ ² 'Ëj A~ . ¯ ö GAC~ ãÖ Ï7ö DO& Ò ãÖ GAC~ OË Ã&~&b¾ Ö² *¾Ò GAC~ ãÖ DO Ò¦f Z~² ê OË~ æz& V>æ p~ . $ Ö¾Ò 5 "V¾Ò GACº ö GACö j ç&'b DO~ 'Ëj ² Af ©b V>î . Öb *¾Ò GACö ~ OB ·f ö GAC~ OË ² 6² > "V *¾Ò GACö ~ OB ·f ² Ã&~& . Ö¾Ò GAC 5 " V¾Ò GAC Îv .Vêö ² o-cresolj O~ º ©b V>îb 7/* ^Úî> ç&'b 6N O ¶Jr . ¾ 7/* ^Úî> v GAC~ O ·ç ² V>î . Ö¾Ò GAC ~ ãÖ £ 5¢ ï;ö ê~&b¾ "V¾Ò GAC Journal of KoSSGE Vol. 9, No. 1, pp. 87~94, 2004.

(19) 5ÁBÏ~. 94. º 10¢ç 7/~¢ò ï;ö ê~º ©b V >î . O³ê þöB V 6ö ªÒB GAC ¦8 ²; soxhlet ÏÂV\¢ Ï~ OB o-cresol j ÏÂ~& . .V £ 1*Úö v (Ö $º " V¾Ò GAC ÒÏ) ÎvöB ÏÂN 6²~º ãËj ¾æÚî . £ 1*êöº ÏÂN~ 6² $º Ã& ãË V>æ p~b ç&'b ¢; ãËj ¾ æÚÚ £ 35~50%~ ÏÂNj ¾æÚî . þ Öö V O 7 Ïö Ò~º ÏÖ²º b &çbî O*ö GACf 7/Î O ê GAC OËö 'Ëj ~º ©b V>î . $ *¾Ò ö ~ RßW æzB GACº ÏÖ²ö ~ A º 'Ëê æz>º ©b j ÏÖ²~ 'Ëf GAC~ RßW &7 ê& ®º ©b º > ® . 2. Ò Ò ¢^f 2001jê *Þã&L .\`9jö ~~ \>îr. ^^ò 1. Abuzaid, N.S. and Nakhla, G.F., “Dissolved Oxygen Effects on Equilibrium and Kinetics of phenolics Adsorption by Activated Carbon”, Environ. Sci. Technol., 29, pp. 216-221. Journal of KoSSGE Vol. 9, No. 1, pp. 87~84, 2004. (1994). 2. Grant, T.M. and King, C.J., “Mechanisms of Irreversible Adsorption of Phenolic Compounds by Activated Carbons”, Ind. Eng. Chem. Res., 29, pp. 264-271 (1990). 3. Vidic, R.D., Suidan, M.T., Traegner, U.K. and Nakhla, G.F., “Adsorption Isotherms: Illusive Capacity and Role of Oxygen”, Wat. Res., 24, pp. 1187-1195 (1990). 4. Prober, R., Pyeha, J.J. and Kidon, W.E., “Interaction of Activated Carbon with Dissolved Oxygen”, AIChE Jour., 21, pp. 1200-1203 (1975). 5. Vidic, R.D., Suidan, M.T., Sorial, G.A. and Brenner, R.C., “Molecular Oxygen and the Adsorption of Phenols-Effect of Functional Groups”, Wat. Environ. Res., 65, pp. 156-161 (1993). 6. Vidic, R.D., Suidan, M.T. and Brenner, R.C., “Oxidative Coupling of phenolics on the GAC surface”, Environ. Sci. Technol., 27, pp. 2079-2085 (1993). 7. , , GAC : I. , , 17(4), pp. 493-503 (2001). 8. , , GAC : II. , , 17(4), pp. 504-516 (2001). 9. Vidic, R.D. and Suidan, M.T., “Operating Capacity of GAC Adsorbers-Dissolved Oxygen and extended Service Life”, Water Environ. Res., 64, pp. 798-804 (1992). 10. Abuzaid, N.S., and Farooq, S. “Activated Carbon Adsorption of Phenolics in Oxic Systems. Effect of pH and Temperature Variations”, Water Environ. Res., 66, pp. 842-850 (1994).. S Ï ~ z' # ' Ò Ò ê WO ßW FÖ² ]b~ã²æ S Ï ~ z' # ' Ò Ò ê WO ßW ZÖ² # Ï ÂF8bî~ 'Ë ]b ~ã²æ.

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