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1、 V o , , C .172nm b , M J. S ,2005,25(6):749- 755FENG Xiangfen, HOUHuiqi, ZHUShaolong.Degradationmechanismoforganic dye inwaterby 172nmvacuumnullUVradiationJ.ActaScientiae Circumstantiae,2005,25(6):749- 755172nm b , M 冯祥芬1, 侯惠奇2, 朱绍龙1,*1. 复旦大学电光源研究所, 上海null 2004332. 复旦大学环境科学研究所, 上海null 200433l :2004
2、null09null02null null null :2005null01null07null null null c :2005null01null10K 1 : _ s 0 172nm b , M ) s . _ s 0 ,Q A T B V ( .s Y ) A Y # F KCl, 8 172nm ) s 0 Y V ; s 1 T . T V , ) V , ; s 1 T ,; V B ) Q , ; 0 q 6null8 null 10- 3mol eistein- 1. HO aHO2 O2 - 1 T / ,) 10min B ) Q .) r q r 80% ,COD q
3、 7 S 9v .GCnullMSs V , ; s T / ,) s 0 V l s 0 .1 o M :172nm ; s ; ;COD c I | :0253null2468(2005)06null0749null07null null m s | :X703null1null null D S M :ADegradation mechanismof organic dye in water by172nm vacuumnullUV radiationFENGXiangfen1, HOUHuiqi2, ZHU Shaolong1,*1. Instituteof ElectricLight
4、 Sources, FudanUniversity, Shanghainull 2004332. Instituteof Environmental Science, FudanUniversity, Shanghainull 200433Received 2September 2004; null Received in revisedform 7January 2005; null Accepted10January 2005Abstract: Thedegradationmechanism oforganicdyeclaret inwaterwas investigatedby172nm
5、vacuumnullUV (VUV) radiation emittedfromtheplanarXenullexcimerlamp. Thesolutionwas servedasoneoftheelectrodesofthelamp. Thedyesolutionwasrespectivelysaturatedwithpureoxygenandnitrogen, andKClwasaddedashydroxylradical scavenger. It wasfoundthat direct photolysis playedamain roleinthedegradationproces
6、s of claret dye. Thedegradationbydirect photolysiswasobservedthepseudonullfirstnullorder kinetics in thewhole degradation processwhilethe degradation byHO ,HO2 andO2 - radicals deviated from firstnullorderkinetics after10min. Thequantumyieldof claret dyebydirect photolysiswas6null8null10- 3mol eiste
7、in- 1. Afterthedegradationefficiencyhadgotto80%, therateofCODremovalbegan toincreasesignificantly. SomeorganicbynullproductswereidentifiedbyGCnullMS spectrometryas aresult of photolysis andoxidationproductionof claret dye.Keywords:172nmradiation; photolysis; degradation; CODT e : V o (1977! ),o ,p V
8、 3 ;Enullmail:; * Y Biography:FENG Xiangfen(1977! ), female, Ph.D. candidate, Enullmail:; * Corresponding authornull null ) E (advancedoxidation process,AOPs) - l 1 ) Z E , P , ; 4 ? z P , , 4 , H P . Y V 4 b 4 H2O21,2aFenton3,4 aOzone5,6aTiO27,8 l , HO 1 ? Q P s . ; b Z E M 1 , s 0 ? b , (VUV) P b
9、4 V l ) . VUV ; 0 ? , V l VUV 7 $ s , Y V l VUV 3 1 T ? Q . _ s 0 B d r VUV , B ; s M 1 ,_ s 0 ; 0 ? (7null2eV),; r ( B O 1 l ), ,p ( = ),i O V 1 ! 9 i 9 11. yN , _ s 0 9 l ) . - . - S = Z 7 ,S Z X 25 62005M 6 null null S null null null ActaScientiaeCircumstantiaeVol.25,No.6Jun., 2005 B t T 12 14 , i . t , I n HO 1 s T , ; s 1 T .y N , 172nm s M B . S = X 7 Z $ , B Z L ,6 B Z 172nm s l T B . L ! 9 _ s 0 ,i Q A T B . P M 1 ,L V ,h . Z ,B 172nm l T Y V l VUV 3
