42 5 Journal of South China University of Technology Vol. 42 No Natural Science Edition May DON DON DBPFP

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1 42 5 Journal of South China University of Technology Vol 42 No Natural Science Edition May X * DON 0 57 ~ 1 69 mg /L 3 DBPFP DOC DON DBPFP DBPFP > > > > X52 doi /j issn X AOM EOM IOM 3 1 DON N- 1 1 DBPs Microcystic Aeruginosa * 2012ZX sina com

2 5 49 FACHB-912 BG mm mm 25 ± lx 12 h 18% DON 95% 7000 r /min min 0 45 μm DOC DON Whatman TOC TOC-V CPH UV 254 EOM HACHDR 2800 EEM 3 F-4500 Hitachi / r /min 5 min 0 45 μm 3 USEPA IOM XAD-8 XAD-4 Fisher Scientific USA TG-5Ms Amberlite 30 m 0 25 mm 0 5 μm 6% DPD-FAS MTBE TN μm ph DON XAD-8 XAD-4 DOC /DON 2 40 ~ 7 52 HPI 0 1 mol /L NaOH XAD GC-MS-MS Thermo 2 DON 0 82 XAD mg /L SUVA 254 UV 254 HPO TPI 100 /TOC L / mg m > > 80% ph DOC UV V 0 02 mol /L em ex 0 05 mol /L EOM IOM Table 1 DOC / mg L Water quality parameters for fractions of algae organic matters TN / mg L - 1 DON / mg L - 1 UV 254 / cm - 1 DOC DON SUVA 254 / L mg - 1 m - 1 HPO TPI HPI HPO TPI HPI

3 50 42 em > 380 nm ex > 250 nm 2 3 IOM EOM IOM EOM EOM em = 420 nm ex = 350 nm em < 380 nm THMs ex > 250 nm HKs HANs 2 EOM IOM em < 380 nm ex > 250 nm IOM THMs NOM 12 1 Fig μg /mg DOC HKs DCP TCP μg /mg > > > > HANs DCAN DCAN μg /mg 2 EOM C- N-DBPs IOM EOM IOM % EEMs for fractions of algae organic matters N-DBPs 15 2 Table 2 Disinfection by-products formation potential of algae organic matters μg / mg THMs HKs CHCl 3 CCl 4 TCP DCP CHCl 2 CN HANs CHCl 3 CN HPO EOM TPI HPI HPO IOM TPI HPI

4 DBPFP SUVA DOC / DBPFP DON 3 > > DBPFP DBPFP THMs HKs HANs DBPFP DBPFP DBPFP DOC /DON DOC /DON > > HKs HANs DOC /DON THMs DOC /DON DBPFP DOC /DON DON 3 Fig 3 SUVA 254 Relationship between disinfection by-products formation potential of algae organic matters and SUVA % 9 56% 66 54% % 6 20% 78 50% DOC /DON % = Fig 2 Relationship between disinfection by-products formation potential of algae organic matters and DOC /DON value μg /mg % μg /mg SUVA C- N-DBPs SUVA C-DBPs THMs HKs DBPFP SUVA % 67 40% N-DBPs THMs HKs HANs DBPFP SUVA 254

5 % > > > > 3 > > DOC /DON DON 4 DBPFP DBPFP > > > > 4 C- N-DBPs Fig 4 Total yield of C- N-DBPs for fractions of algae organic matters 3 1 Zhang X J Chen C Ding J Q et al The 2007 water crisis in Wuxi China analysis of the origin J Journal of Hazardous Materials /2 / Zhang X J Chen C Lin P F et al Emergency drinking water treatment during source water pollution accidents in china origin analysis framework and technologies J Environmental Science & Technology Ma M Liu R P Liu H J et al Chlorination of microcystis aeruginosa suspension cell lysis toxin release and degradation J Journal of Hazardous Materials Chang H Chen C Wang G Characteristics of C- N-DBPs formation from nitrogen-enriched dissolved organic matter in raw water and treated wastewater effluent J Water Research Lee W Westerhoff P Croue J P Dissolved organic nitrogen as a precursor for chloroform dichloroacetonitrile N-nitrosodimethylamine and trichloronitromethane J Environmental Science & Technology SUVA Dotson A Westerhoff P Krasner S W Nitrogen enriched dissolved organic matter DOM isolates and their affinity to form emerging disinfection by-products J Water Science and Technology Fang J Y Yang X Ma J et al Characterization of algal organic matter and formation of DBPs from chlor am ina- 2 tion J Water Research Li L Gao N Y Deng Y et al Characterization of intrace- & extracellular algae organic matters AOM of mi- llular > > crocystic aeruginosa and formation of AOM-associated dis-

6 5 53 infection byproducts and odor & taste compounds J Water Research Lee W T Westerhoff P Dissolved organic nitrogen measurement using dialysis pretreatment J Environmental Science & Technology Yan M Q Wang D S Ni J R et al Mechanism of natural organic matter removal by polyaluminum chloride effect of coagulant particle size and hydrolysis kinetics J Water Research M Xu B Gao N Y Sun X F et al Characteristics of organic material in Huangpu River and treatability with the O-3- BAC process J Separation and Purification Technology Ou H Gao N Y Deng Y et al Immediate and long-term impacts of UV-C irradiation on photosynthetic capacity survival and microcystin-lr release risk of Microcystis aeruginosa J Water Research Chen Z Valentine R L Formation of N-nitrosodimethyl- 11 Weishaar J L Aiken G R Bergamaschi B A et al Evaluation of specific ultraviolet absorbance as an indicator of amine NDMA from humic substances in natural water the chemical composition and reactivity of dissolved or- J Environmental Science & Technology ganic carbon J Environmental Science & Technology Sharp E L Parsons S A Jefferson B Seasonal variations 12 Hyun-Chul K Yu M J Characterization of aquatic humic in natural organic matter and its impact on coagulation in substances to DBPs formation in advanced treatment water treatment J Science of the Total Environment processes for conventionally treated water J Journal of /2 / Hazardous Materials / D Characteristics of Disinfection By-Products Formation from Algae Organic Matters in the Process of Chlorination Gao Nai-yun 1 Zhu Ming-qiu 1 Zhou shi-qing 1 Li Lei 1 Rong Wen-lei 2 Zhou Sheng-dong 2 Lu Na-xin 2 1 State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai China 2 Wuxi Waterworks Co Ltd Wuxi Jiangsu China Abstract Six kinds of nitrogen-enriched intracellular and extracellular algae organic matters of Microcystic aeruginosa with different characteristics were obtained via the fractionation electrodialysis of hydrophilic and hydrophobic components with the mass concentrations of dissolved organic nitrogen DON ranging from 0 57 to 1 69 mg /L Then the 3D fluorescence spectrography was adopted to analyze the composition of hydrophilic and hydrophobic components finding that the former was mainly composed of humus-like substances and the latter mainly composed of protein Afterwards the formation characteristics of carbonaceous nitrogenous disinfection byproducts from different organic matters were analyzed and compared after a 3-day chlorination The results show that 1 hydrophobic intracellular and extracellular organic matters are of maximum trihalide methane formation potential especially for chloroform 2 there is a significant correlation between haloketone formation potential and intracellular and extracellular organic matters 3 the hydrophilic component in intracellular organic matters is of the greatest nitrogenous disinfection by-products formation potential DBPFP 4 the disinfection by-products formation potential of each component is not only determined by the value of DOC /DON namely the mass concentration ratio of dissolved organic carbon to DON but also by the characteristics of DON 5 the DBPFP of extracellular organic matters is positively correlated with the content of aromatic organic materials while that of intracellular organic matters is mainly influenced by the properties of aromatic organic materials and 6 the disinfection by-products produced by extracellular organic matters are in a content order of hydrophobic by-products > hydrophilic by-products > transphilic by-products while those produced by intracellular matters are indicative of the following order hydrophilic by-products > hydrophobic by-products > transphilic by-products Key words Microcystic aeruginosa disinfection by-product hydrophilicity hydrophobicity dissolved organic nitrogen chlorination