KHOA HQC C 6 M 0 MOHt
l\IGHl£l\l CLTU H i i u QUA XLT LY M A U V A C H A T H L I I J CO TROIVG (VLrOC T H A I MLTC ll\l Q A M G C O I V G I M G H C
OXY HOA B A C C A O UV/O3
T r i n Thi Nhung", VO Van Nghj' T6MTAT
Qud trinh oxy hfta bac cao UV/Oj dugc ling dung d i xii ly d0 m^u vd chdt hflu ca trong nuftc thdi myc in;
thyc hiin nghi&n ctiu diin hinh cho nuftc thai sau xu ly bdng keo tu tao bdng clia nha mdy sdn xudt myc in Tan Dfing Duong - Khu CSng nghiip Bifin H6a 1 - Ddng Nai. Kit qua khao sdt dya trfin mfi hinh phfing flii nghidm cho thdy, hfi UV/O3 cfi khd nang loai bfi 83,4% d0 mAu vd 54,3% chdt huu ca co trong nufic thai tai 1 cdc diiu kiin tdi mi: pH = 9; ham lugng O3 cung cdp Id 43,2 mg/gift, thfti gian xu ly 80 phiit vd dfin UV cfi i buftc sfing 254 nm. Sau xu ly bang UV/0,. nufic fliai oia nhd mdy d?t QCVN 40:2011/BTNMT - c«t A vfi dfi mdu vd cfit B vi COD. Ddng thdi, cdc anion vo ca nhu Ct, SOA HCO," (hdm lugng tuong ling 0,034 mol/L, 0,014 mol/L va 0,024 mol/L) dugc chiing minh Id lam giam hi$u qua cua qud trinh AOP ndy. Kit qua nghifin Cliu cfi dfi tin cdy cao khi cac tfai nghidm dugc tiin hanh trfin hai loai ninic thai (nuoic thai ty tao va nuftc thai thyc) va cho hi^u qua xii ly tuong ddng vdi nhau.
Tit khfia: Qud tiinh 6xy hoa tt^c cao (AOP), O3, UV/0^xuiynu6cthaimiicin.
1. MAfUUI
Nudc thdi myc in phdt sinh tir cdc cdng dogn cua qud trinh sfa xudt, v i sinh thiit bj mdy mdc vd tir qud trinh v i sinh xuftng khi muc in bj trfa dd vfti cdc chdt d nhiim chinh Id acryhc resin dang nhQ tuong hfta tan trong nudc vd bdt mdu. Nft cOng chiia hfag chuc phu gia nhu chdt dn dinh, tdc n h t a k h i hgt, hogt chdt b i m$t, chdt bdo quta..., dfti khi cdn chiia nhiing chdt lie c h i phfa iing sinh hgc vd ion kim loai nang. Ddy Id mftt trong nhiing loai nuftc thdi cdng nghiip rdt khft phfa hiiy smh hgc. Cdc phuang phdp chii y i u d i xir ly loai nuftc thdi ndy Id keo ta (Wy D. et al., 2002; Cai Y., Zhang Z., 2006;
Tapas N. et al., 2003), hdp phy (Zhou D. et al., 2007;
Zhang G. et al., 2010; Metes A et al., 2004), diin gidi (Wang W., 2007; Zhang G. J. et al., 2004), xir Ij?
sinh hgc (Wu G., Yang R., 2005) vd oxy hfta sii dyng NaClO, KMnOi, CJiiO,... Tuy nhiin, cdc phuang phdp ndy vfa tdn tai nhiiu han c h i (Lichao D. et al., 2011) nhu cd t h i gdy d nhiim thii cdp hay chi phi cao.
Hiin nay, t r i n t h i gidi, viic ling dyng qud trinh oxy hfta b j c cao (Advanced Oxidation Process - AOP) trong xu ly cdc lo?i nuftc thdi cd dd mdu vd hdm lugng chdt huu c a cao nhu nuftrc thai sdn xudt cd p h i hfta tan (Masahu-o T., 2006; Teresa Zayas P. et al., 2007), nuftc thai d$t nhudm (Azbar
' Cong ty Nuftc vd Mfii tmdng Blnh Minh ' Dai hgc Khoa hgc Tw nhien - TP. Ho Chi Minh
N. et al., 2004)...da dem lai nhiing kft qua khd quan. AOP Id qud trinh p h t a huy cdc chdt ft nhiim hfiu ca, ddc b i i t la nhiing chat hiiu c a khft phSn hiiy sinh hgc, dya vdo gdc tu do hogt ddng hydroxyl OH* duac tao ra ngay trong qud trinh xii ly. Ddi vfti nuftc thai myc in, mdt sd phuong phdp AOP nhu Fenton (Ma X. J., Xia H. L , 2009), UV/Fenton (Chen X., 2010), UV/TiOj (Si A. E., Ma E. K., 2009)... da dugc nghiin ciiu ling dung.
Bin canh dd, h i oxy hfta bgc cao UV/O3 theo \j thuyit cung cd k h a nang tuong ty, tay nhiin cdc thyc nghiim k i i m chiing tinh hiiu qua cua nfi trong x u ly mdu vd chat htiu c a cua logi nuftc thdi ndy chua dugc nghiin ciiu ndo Uin hfah. Do dd, dufti ddy Id quy trinh khao sdt hiiu qud ciia qui trinh ozon quang hfta thdng qua cdc thi nghiim xdc dinh diiu kiin xii ly tdi uu, ddp img nhu cdu thyc a i n vd tao nghiin ciiu n i n tang v i khd nang ling dyng cdng n g h i AOP ddi vfti mdt trong nhiing loai nuftc thai cdng nghiip khft xir 1^ nhdt.
2. NGUVtNViTltUVt PHUONG PHAP N G H A O i l 2.1. Ddi tugng nghiin cihi
Nuftc thdl Clia nhd mdy sfa xudt myc in Tan Ddng Duong - Khu Cdng nghiip Biin Hda 1, tinh Ddng Nai dugc sir dung d i tiin hdnh nghifa a h i . Gid trj cdc thftng sd cdn thiit ciia chdt lugng nuftc thdi truftc vd sau xir ly bdng keo hj tgo bdng du^c xdc dinh (Bdng 1).
58 N O N G NGHlfP vA PHAT TRIEN N 6 N G TH6N - Kt 1 - THANG 9/2013
Bdng 1: Mftt sd thftng sd chdt luyng nuftc thdi cfa thift
Chi tifiu
pH COD (mg/L) Dfi mau (Ft-Co)
Nufic thdi truftc xu
»bdng keo ty tgo
bfing 7,3 2.560 27.000
Nudc thdi sau xuly bdng keo ty
tgo bdng 4,9 254 223
QCVN 40-.2011/BTNMr
A 6-9
75 50
B 5,5-9
150 150 D^ tang dd tin cay v^ hi^u qua xu ly, nghifin cuu du9c t i ^ h ^ h song song tr^n mSu nu6c Ihai thuc vk mau nu6c thai tu tao:
M5u nu6c thai thuc sau xir 1^ keo tu tao bong c6 dd mau 254 Pt-Co v^ COD 223 mg/L;
MSu nu6c thai thuc chua xu ly dupc pha b a n g 9 lan d^n dp mdu 3000 Pt-Co v i COD 240 mg/L d^ phu hpp voi quy m6 md hinh thi nghidm;
Ckc mSu nu6c thai tvr tao dupc pha tvi 4 mku muc in l^y t ^ nhk vnky: mku xanh, mku do, m^u h6ng, mku tim vk t6ng hpp 4 mku. Gik trj dO miu cua cic mau tu tao l i 600 Pt-Co v i gii tri COD l i 240 m g / L
22. M6 hlnh nghifin cihi v i quy trinh thvc n g h i ^
M6 hinh thyc nghidm d^ dinh gii hi^u q u i xu ly miu v i ch^t hOu c a trong nu6c thii muc in dua trfin UV/O3 dupc thi^t k^ nhu hmh 1. Hai thi^t bj chinh cua m6 hinh UV/O3 l i miy t^o khi O3 hifiu Resun - RO 25 v i dfin UV 14 W hifiu Aquapro 254 nm.
Xk djnh d9 nun, COD liuoc miy M&-tokhuay .DenUV
Yttriyymau
Xac ^ dp m k COD sau xu ly
Hinh 1: Mft hlnh n^^fin cihi
Quy trinh thuc nghidm:
- 0,8 L nu6c thii dupc cho vio b^ chiia c6 kich thu6c 11x11x17 cm ( c h i ^ dii x chi^u rfing x chi^u cao), xic dinh COD (mg/D v i dO m i u (Pt - Co) ban dku;
- Sue khi O3 vio b^, b&t mo-ta khu^y voi ^ db 100 vdng/phiit d^ khi O3 k h u ^ h tin d ^ , lupng O3 cdn du dupc h ^ thu vio dung djch KI 2%;
- Xkc dmh COD v i dp miu sau moi 20 phiit cua q u i trinh xu ly.
Mdi dpt chay md hinh k^o dii 120 phiit; ti^n hanh cic thi nghifim trfin hfi O3 v i h§ UV/O3. Ddi vdi hfi O3, khdng b i t dfin UV trong suot thdd gian xu ly.
Cic y^u td khio sit bao gdm: pH, him lupng O3, thdi gian xu ly tdi uu, anh hudng cua cic anion vd c a HCO3-, C1-, S04^.
Su dung phuang phip phin tich trong phdng thi nghifim xic djnh cic thdng sd: pH, COD, dp m i u trudc v i sau phin ung, him lupng O3 ban dau v i him lupng O3 du:
- Cic thdng sd pH, COD dupc xic djnh theo SMEWW {Standard Methods for the Exammmatlon of Water and Wastewater- cic phuong phip chuin cho viic kiim dfnh nudc vi nudc thii); pH dupc di^u chinh tdi cic gii trj cin khao s i t b ^ g dung djch NaOH 1N v i H2SO4 0,025 N.
- Him lupng O3 dupc x i c djnh theo hudng din v^ do dac him lupng ozon trong q u i trinh tao khi tir miy Ozon {Guidelme for Measurement of Ozone Concentration in the process Gas hom an Ozone Generatoi);
- Dd miu dupc x i c dinh b ^ g phuang phip so miu trfin miy quang ph6;
Hi$u q u i xii ly COD v i dO m i u cua nudc thii dupc xic djnh nhu sau:
H ( % ) = ( ^ ) x l O O
Trong dd: H: Hi^u q u i xii ly miu v i COD (%); x:
Gii tri COD (mg/1) hoic dd miu (Pt-Co) ban dku; y.
Gii trj COD (mg/1) ho?c dO miu (Pt-Co) sau khi xu iybang03,UV/03.
8. K^QlUvATHAOlUJiN
3.1. Dinh gii i n h hudng ciia pH v i x i c d|nh pH t^iuu
N 6 N G NGHlfP VA PHAT TRI^N N 6 N G T H 6 N • Kt 1 - T H A N G 9/2013
KHOA HQC C O M O MOHt
K^t qud khdo sdt dnh hu6ng ciia pH d^n hi^u qud xu ly mdu vd COD bdng H O, vd UV/O3 dui?c thi hi^n trong hmh 2 vd hinh 3.
Hinh 2: Anh hu6ng dia pH din hi^u qud xii 1^
mdu hi UV/O3 (trdO vd hi O3 ftihdO
Jt^^^^~-±:;~^
\ p^'
^^^^*^^--i ' ' *L---'''*~~~~-^
1 «—.-
J ! pH
I * II - • - M l i i l m - x - M k i u h
D6ng thdi, h i sd h ^ thu phdn tut ciia 03&bu6i;
s6ng 254 nm khd cao (3,300 M'^cm'O nin si^ quang phdn Clia O3 trong ntnk: du6i dnh sdng hi ngo^i- kh6ng b) hsn chi CTrdn M?nh Tri, Trdn Manh Trung, 2005).
Su khde nhau vi hiiu qud xii 1^ giua cdc mdu nin>c thdi ti,r t^o tir 4 mdu muc in d u ^ gidi thich trin CCT SCf d$c tinh cua hot mdu hiiu ca su dyng trong qufi ^ trinh sdn xudt cua nhd mdy vd khd ndng h ^ thu biic xa UV Clia tiing mdu muc. D6i v6i mdu nu6c thdi.
thuc chua xu 1]^ pha loang 9 Idn, hiiu qud khii mdu vd loai COD thdp vi nu6c thdi ndy chua qua mOt cfing doan xii \^ ndo khde.
Ttr nhiing kit qud phdn tich trin ca sa di& biin hiiu qua xu Iy, chpn pH - 9 di Hin hdnh xdc djnh Iuong O3 toi uu cho qud trinh oxy h6a bdng O3 vd UV/O3.
3.2. Ddnh gid dnh hudng dia hdm Iupng O3 vd xdc djnh hdm lugng O3 tdi uu
Hinh 3: Anh hn6ng dia pH din hiiu qud xii I^ COD hi UV/O3 (Udi) vd hi O3 (phdi) Cd hai hi O3 vd UV/O3 diu c6 khd nang xil I^
mdu vd loai hb COD cia cdc mlu nuoc thai. Tuy nhiin, hiiu qud xu ly phu thuic vdo gid trt pH vd dat tdi uu khi pH - 9, nguyin nhdn Id do h-ong mii trudng kiim, ozon di bj phdn hiiy hon trong mfii trudng axit (Nguyin Vdn Phudc vd cpng su 2010;
Rein I^!unt, 2001). Theo Nguyin Van Phudc vd cdng su (2010), CT pH thdp, chdt hQu CCT hi oxy hda truic hip bdi phdn bi ozon; d pH > 8,5, ngodi O3, cdc chdt hiiu ca cdn hi oxy hda bdi tdc nhdn hydroxyl OH* tao ra tir qud trinh phdn buy O3 theo phdn ling:
303-fH20-.2 0H- + 403
Hiiu qud xu ly mdu vd COD d hi UV/O3 cao hon hi O3 do gdc OH" dupc sinh ra nhiiu hon dudi tdc dung ciia blic X? UV (Kang C, Tang X., 2009) theo CCT chi phdn ling:
O3 -f HjO -f hv -> O2+ H A 2O3+H2O2 + hv -• 20H* * 302
Hmh 4: Anh hudng cia hdm Iupng O3 din hiiu qud xii ly mdu h i UV/O3 (trdi) vd h i O3 (phdO
60
Hhih 5: Anh hudng ciia hdm Iupng O, din hiiu qui xii ly COD h i UV/0, (trdO vd hi O, (phdi) 6 cd hai hi O3 vd UV/O3, khi lupng O3 cung c ^ cdng nhiiu, lupng O3 phdn ling cdng Idn thi hiiu qud xii ly mdu vd Io?d COD ciia nudc thdi cdng ldng. Tuy nhiin, khi d?t din mit gidi hfin nhdt djnh, cdng tdng
N 6 N G NGHlfP VA PHAT TRI^N N 6 N G T H 6 N - K t 1 - T H A N G 9/2013
lupng O3 thi hi^u qua khdng ting nua, t h ^ chi giim xuong. Di^u niy dupc giai thich li do hifiu suit su dung O3 giam khi him Iupng O3 cung cip ting qui ngudng gidi h9n. Luu lupng sue khi ldn lam cho lupng bpt khi sinh ra nhi^u hon, lim ting tin suit va cham giua cic bpt khi vdi nhau, tao thinh nhOng chiun bpt khi ldn va n6i Ifin trfin b^ mat dung dich.
Khi dd, difin tich b^ mgt ti^p xiic giua pha khi vi pha ldng giim lim cho khi ning khu^h tin khi O3 trong pha khi vi trong dung dich nudc thai giam theo.
Lupng O3 hda tan trong dung djch vi viy ciing it hon khi^n cho hi^u qua xu ly giam din. Lupng O3 t<5i uu d^ xu ly cic miu nudc thii tu tao vi miu nudc thii thi;rc d h§ O3 vi hfi UV/O3 la 43,2 mg/gid tuong iing vdi Iuu lupng 3 L/phiit. K^t qua khao sit anh huong cua him lupng O3 dupc minh hpa trong hinh 4 vi hinh 5.
3.3. Tlidi gian t6iwid6xdl^ nudc thii mvc in cuah^OsViheUV/Os
Hi^u qua xu ly miu vi lo^ COD ciia cic miu nudc thii b ^ g h§ UV/O3 trong cic di^u kifin pH vi O3 toi uu dupc trinh biy trong hinh 6. Vdi tong thdi gian thi^c nghidm li 120 phiit, k^t qui cho thiy xu hudng chung li dp miu vi COD giim manh trong 80 phlit diu cua qui trinh xu ly vi d4n 6n djnh trong 40 phlit cdn lai. Cin cii vio diin bi^n hi§u qui xii ly, cd th^ xic djnh thdi gian tdi uu d^ xu ly nudc thii muc in bang tic nhin O3 vi UV/O3 li 80 phiit
- * Mtohiit - * - U k i 4 d
• UkiiAii|b«|i - e - M f a t a i B i * i }
-O-Mtatm - • - M k u i t - — u f a M c ( t a i * l f
--*• UiuWmi - * - ) A i u * i
• Mkilliibcip - 0 - M i u t v c m >
Hhih 6: Hiiu qud xii ly mdu (trdi) vd COD 0>hdi) bung diiu kiin pH vd 0, tdi uu bdng UV/0, 3.4. Hiiu qud xii ly nudc tfadi muc m thvc sau keo ty t^o bdng cua nhd mdy
Hinh 7 cho thdy, sau xii ly bdng hi O3, nudc thdi sau keo bj tao bdng d?t cOt B - QCVN 40:2011 d cd chi Uiu COD vd dd mdu; sau xii ly bang hi UV/O3, nudc thdi sau keo hi tao bdng d^t cOt A - QCVN 40:2011 vi dd mdu vd cdt B - QCVN 40:2011 vi COD.
—OCVTuo-Jsii-B - - <3CVT;«
Hhih 7: Hiiu qud xii ly d*. mdu (frdi) vd COD (phdi) cua nudc thdi thyc sau keo tu t?o bdng bdng O, vd
UV/Oa d cdc diiu kiin pH, O, vd thdi gian tdi uu 3.5. Anh hudng dia cdc anion Ct, HCO3, SO,^
din hiiu qud xuly
Kit qua nghiin cliu cho thdy, khi nudc thdi chiia cdc anion vd ca nhu Cf (0,034 mol/L), HC03- (0,024 mol/L), SO/ (0,014 mol/L), hiiu qua xii ly mdu vd COD d cd hi Oj vd hi UV/O3 ddi vdi timg mdu nudc thdi diu gidm so vdi khi nudc thdi khdng chiia cdc anion ndy. Anh hudng ciia cdc ion ndy dupc thi hiin trong hinh 8.
Hinh 8: Anh hudng dia anion din hiiu qud xii ly nudc thdi thyc sau keo h^ t ^ bdng hi UV/O3 Theo Joseph vd cOng su (2004), cdc anion vd ca ldm gidm hiiu qud ciia qud trinh AOP do chiing tim diit cdc gdc OH' theo ca chi:
OH* + HCOj- — HCOs" * OH 0H'+C1-.C10H"- 0 H ' + S 0 / - . S 0 4 ' +0H-
Cdc gdc OH* mdt khd nang phdn ling oxy hda hoac tao thdnh nhihig phiic chdt khdng hoat ddng.
Sw hiin diin ciia ion SO/ it ldm dnh hudng din hiiu qud xir ly hon hai ion cdn lai Id do hdng sd tdc dp phdn ling cua gdc SO," vdi cdc chdt hiiu co h'ong nudc thdi (10* - 10") thdp hon hdng sd tdc dd phdn ling dia gdc OH* (10* - 10'°) nhung l?i cao ban hai
N 6 N G NGHlfP VA PHAT TRI^N N O N G THON - KY 1 - T H A N G 9/2013 61
KHOA HQC C O M O MOHt
gdc ion cdn lai Id HCOj* vd ClOH*" (Itf - IO') (Nguyin van Phudc et al., 2010).
4. KfrUHN
Hiiu qud xu ly mdu vd COD cua hi O3 vd hi UV/O3 ddi vdi mdu nudc thdi hr t?o vd mdu ntldc thai thuc cd su hrong ddng vdi nhau nin kit qua nghiin Cliu cd dd tin cdy cao. Hi UV/O3 xu ly mdu vd chdt huu ca tdt hon hi O3 nhd biic xa UV cd tdc dung tao ra nhiiu gdc tu do OH* hon. Hiiu qud khii mdu vd loai COD bdng hi UV/O3 ddi vdi nudc thdi muc in sau keo tu tao bdng ciia nha mdy Tdn Ddng Duong Idn lupt Id 83,4% vd 54,3% tai cdc diiu kiin tdi uu vdi pH - 9, hdm lupng O3 43,2 mg/gid vd thdi gian 80 phlit Nudc thdi sau xir ly bdng qua trinh AOP ndy dat cdt A- QCVN 40:2011/BTNMT.
Qud trinh thuc nghiim cho thay rdng, ngodi cdc yiu td anh hudng chinh nhu pH vd hdm lupng O3, su hiin diin cua cdc anion vd ca thudng gap nhu Cl", HCOs", 8 0 / hong nudc thdi cung ldm gidm hiiu qud ciia qud trinh oxy hda bac cao, do dd di ddm bdo hiiu qud cdn cd biin phdp khir ho$c han chi dnh hudng cua chiing.
Kit qud nghiin ciiu ndy Id tiin di cho cdc nghiin oiu ling dung thyc tiin vi xii ly nudc thdi ngdnh cdng nghiip san xudt muc m, tao diiu kiin thudn lpi cho viic xii ly Uip theo d hi thdng xu ly nudc thdi tap tiung ciia khu cdng nghiip.
Till Ilu HUM KHAO
1. Nguyin Vdn Phudc, Nguyin Van DQng, Nguyin Th( Thanh Phupng, Li Qudc Thdng, 2010.
Nghiin cuu xulj^ nudc thai con bing hi quang hda - Ozone (UV/O3). Sci. and Technol. Development Vol.
13, No. M2-2010.
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3. Azbar N., Yonar T, Kestioglu K., 2004.
Comparison of various advanced oxidation processes and chemical tieatment methods for COD and colour removal hrom a polyester and acetate Sher dying efBuent Chemosphere 55, p.3543.
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6. Joseph De L, Giang Truong Le, Bernard L, 2004. A comparative study ofthe effects o/cbloride, sul&t andnitiate ions on the rates of decomposition ofHjOi and organic compounds by Fe(II)/Hfl! and Fedw/Hfii Chemosphere 55, p.715-723.
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School of Res. and Environ. Eng., Jiangxi University of Sdence and Technology, Ganzhou, China.
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Estonian Acad. Sci. Chem., p.59«).
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U'Rpas N., Sunita S., Pathe P, Kaul S., 2003.
Pre - treatment of currency printing ink wastewater through coagulation - flocculation process. Water, Ah Soil Pollutl48, p.15-30.
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Sci. Vol.19, Issue 3, p.300-305.
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utraBlbation membrane buled by banknote printing 19. WangW., "Sffl. Application t^Electrolysis to works wastewater. Joumal of Desali 170, p.271-280. Ink Sewage Treatment Joumal of Maoming Univ.
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Preparation of PAMAM modlBed Zeolite and 20. Wu D., Luo Y, Fu W., Wu Z., 2002. Sbidy Application in Wastewater Treatment of Printing on Treatment of Printing Ink Wastewater and Its i i i Leather Chem. 27(1), p.36-39. Effect on the Water's Chroma by Coagulation
18. Zhou D., Zhao T , Hu S., 2007. Adsorbing ^^""^ Envuon. Protect Sci.28(113), p.16-19.
Properties of Activated carbon for Treating Water - 21. Wu G., Yang R., 2005. Test of sludge based hik - Manu&ctunng Wastewater. EaviToa. Sd. digestion process for treatment of printing ink Technol. 30(3), p.85.86. wastewater hid. Water Wastewater 36(4), p.29-31.
STUDY ON THE EFHCIENCY OF TOEATING COLOR AND ORCSANIC MATTER IN PRINTING-INK WASTEWATER BY THE ADVANCED OXIDATION PROCESS UV/O3
Tian Thi Nhung, Vu Van Nghi Sumniary
This study applied the advanced oxidation process UV/O3 to remove color and organic matter in the printing ink wastewater, case study for the wastewater of Tan Dong Duong Ink Production Factory - Bien Hoa 1 Industrial Zone - Dong Nai after it was treated by coagulation and flocculation. The results of research which based on the laboratorial model showed that the UV/Oj process was able to remove 83.4% of color and 54.3% of organic matter ui tbe printing ink wastewater at the optimum conditions: pH = 9, correlative ozone - starting rate of 43.2 mgOj/h, handling time of 80 minutes with 254 nm UV lamp. After Ueating by this AOP process, the color of wastewater reached QCVN 40:2011/BTNMT - A - The National Technical Standards for Industrial Wastewater; COD reached B - this standard. Also, the results showed that anions such as Ct (0.034 mol/L). HCO,- (0.024 raol/L), SO/ (0.014 mol/L) significantly reduced the efflciency of this AOP process. The results of study are highly reliable because the experiments were conducted with two types of wastewaters (artificial wastewater and real wastewater) and got the similar efQciency.
Keywonls: Advanced oxidation process (AOP), O^ UV/0^ piinting-ink wastewater treatment Ngudi phdn biin: PGS.TSKH. Nguyin Xudn Hdi
Ngdy nhdn bdi: 24/5/2013 Ngdy thdng qua phdn biin: 20/6/2013 Ngdy duyit ddng: 3/7/2013
N 6 N G NGHlfP VA PHAT TRI^N N 6 N G T H 6 N - KY 1 . T H A N G 9/2013
