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녹조현상 원인조류들의 염소처리에 의한 소독부산물 생성 및 microcystins 유출
박혜경 ( Hae Kyung Park ),서용찬 ( Yong Chan Seo ),조일형 ( Il Hyung Cho ),박병황 ( Byung Hwang Park ) 한국물환경학회 ( 구 한국수질보전학회 ) 2006 한국물환경학회지 Vol.22 No.3
The effect of chlorination on disinfection byproducts (DBPs) production from bloom-forming freshwater algae including 7 strains of cyanobacteria and 6 strains of diatoms was investigated. The release and degradation of hepatotoxin (microcystins) by the chlorination on Microcystis under differential condition of the chlorination time and dose were also investigated. The disinfection byproducts formation potentials (DBPFP) of cyanobacterial species and diatoms were ranged from 0.017 to 0.070 μmol DBPs/㎎ C and from 0.129 to 0.708 μmol DBPs/㎎ C respectively. Among three major groups of DBPs, haloacetonitrils (HANs) was major product in most test strains except Aphanizomenon sp. and Oscillatoria sp. Haloacetic acids (HAAs) was less than 5 % of total DBPs. Chloroform and dichloroacetonitril (DCAN) were dominant compounds in trihalomethanes (THMs) and HANs respectively. After 4 hours chlorination of toxic Microcystis aeruginosa under the dose range of 0.5 to 10 ㎎ Cl2/L, the concentration of intracellular microcystins decreased, but dissolved dissolved microcystins concentration increased with the treatment of more than 3 ㎎ Cl2/L. However the total amount of microcystins was almost constant even at 10 ㎎ Cl2/L of chlorination. To conclude, our results indicate that the chlorination causes algal cell lysis and release of intracellular microcystins in the intact form to surrounding waters.
LC/MS법 및 LC/UVD(EPA-631)를 이용한 수계 중 Benomyl의 분석법 평가
김기동,최원규,서용찬,박병황,최혜경,Kim, Kee D.,Choi, Won Gyu,Seo, Yong Chan,Park, Byung Hwang,Choi, Hye Kyung 대한화학회 2001 대한화학회지 Vol.45 No.1
내분비계 장애물질 중의 하나인 농약 benomyl의 환경잔류실태를 조사하기 위해 수질중의 benomyl 농도를 정량 하였다. 일반적으로 benomyl은 가수분해하여 carbendazim으로 변하며 본 분석법은 carbendazim을 정량 하는 간접법이다. 수질중의 잔여 benomyl은 가수분??후 적절한 용매로 추출하여 농축, 정제되었다. 농축된 시료의 carbendazim 농도를 LC/MS (TOF)로 분석하였으며 그 결과 방해물질에 의해 발생할 수 있는 오차를 제거할 수 있었다. 검출한계는 LC/UVD법(EPA-631)에 비하여 약 1,600배 낮았으며 spike의 회수율도 약 80~118%로 양호하였다. Benomyl, one of the known endocrine disrupting chemicals, was analyzed to understand the its fate in water. Benomyl analysis process in water sample include the following sequential steps. Hydrolysis of benomyl into carbendazim, solvent extraction, concentration, and the concentration of final carbendazim solution was determined by LC/MS (TOF). Recoveries of the spiked samples were good with the range of 80.6 to 118.6% and the MDL was 1,600 times lower than that of LC/UVD method. The use of LC/MS (TOF) successfully eliminated the positive error incurred by interferencing materials in the matrix.