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研究生:高小萍
研究生(外文):Kao, Sheau-Ping
論文名稱:水中異臭味物質的分析
論文名稱(外文):Analysis of Odorous Compounds in Drinking Water
指導教授:林財富林財富引用關係
指導教授(外文):Lin Tsair-Fuh
學位類別:碩士
校院名稱:國立成功大學
系所名稱:環境工程學系
學門:工程學門
學類:環境工程學類
論文種類:學術論文
論文出版年:1998
畢業學年度:86
語文別:中文
論文頁數:153
中文關鍵詞:異臭味嗅覺層次分析封閉式迴路氣提分析順-110-二甲基-順-9-癸醇飲用水
外文關鍵詞:2-甲基異龍腦OdorFPACLSAGeosmin2-MIBDrinking Water
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本研究分析南台灣飲用水中之臭味物質。分析方法包括兩種﹐一是以
嗅覺層次分析法(Flavor Profile Analysis﹐FPA) 來分析臭味物質及其
強度﹔ 另一種方法則是以封閉式迴路氣提分析法﹐配合 GC/MSD 來鑑定
臭味物種及其濃度值﹐此兩種方法對於飲用水中臭味物質具定性及定量的
能力。 FPA 方法被選擇替代傳統的初嗅數 (Threshold Odor Num-ber,
TON) 是因為 FPA 方法對於臭味物質的強度及描述比 TON 方法來得精確
。FPA 訓練課程共有 11 個﹐經由兩階段的訓練課程發現測試者的準確度
提升。 由實驗中發現﹐FPA臭味強度與 2-MIB 濃度的對數值呈一線性關
係。 在 CLSA-GC/MSD 分析方面﹐ 本研究以兩種常見的臭味物質如
Geosmin 及 2-MIB 為目標物。經由 CLSA 系統可將臭味物質濃縮40,000
倍﹐且此兩種物質在 30 到 500 ng/L 濃度範圍的檢量線呈一線性﹐而
2-MIB 的偵測極限為 12.3 ng/L﹐低於其臭味恕限值 (29 ng/L)。 為了
測試此兩種方析方法﹐我們採集並分析高雄澄清湖給水廠及屏東港西抽水
站的水樣。FPA 測試小組測試水樣之結果﹐發現水樣中常見臭為包含土臭
味、腥味、草味及氯味。根據 CLSA-GC/MSD 實驗結果﹐2-MIB 物質在澄
清湖給水廠在清水中發現一次﹐而在港西抽水站各處理單元則幾乎在所有
水樣中發現 2-MIB 物質的存在。其 2-MIB 物質的濃度在 46 到 403 ng/
L 之間。 此外﹐並採集輸水管沿線及鄰近用戶之用水﹐均發現有2-MIB物
質的存在。 FPA臭味強度與餘氯及 2-MIB 間的關係也被探討﹐氯味與
餘氯濃度間呈現強烈的關係。雖然﹐在未添加氯前﹐水樣中的土臭味可被
FPA 測試小組輕易的感覺到﹐但水樣中 2-MIB 物質的濃度與 FPA 臭味強
度間關係並不像實驗室配製的標準溶液一般有良好的關係存在。此外﹐當
水樣中有餘氯存在時﹐土臭味很難判斷出來﹐這是因為餘氯掩蓋土味的關
係。
Analysis of odorous compounds in the drinking water in
southern Taiwanwas investigated. Two approaches, including
flavor profile analysis (FPA) forodor group and intensity
analysis, and closed loop stripping analysis (CLSA)followed by
gas chromatograph/mass spectrometry detector (GC/MSD) for
odorantspecies and concentration identification, were employed
to qualitatively andquantitatively determine the common odors
observed in the drinking water. FPAwas selected to replace the
traditionally used threshold odor number (TON) me-thod, as it
can describe odor intensity andodor group more precisely. An
odoridentification kit developed by University of Pennsylvania
was first used toscreen the qualified panelists. Eleven classes
were then conducted to trainthe qualified panelists. After
two-stage training courses, higher precisionwas found for each
panelist. Laboratory experiments indicated that FPA
odorintensity is proportional to the logarithmic
concentration of an odorant,2-MIB. In the CLSA-GC/MSD
analysis, two commonly observed earthy odorcompounds,
Geosmin and 2-MIB, were selected as representative odorants.
Afterprocessing in the CLSA system, a 40,000 times of
concentration of bothcompounds were found to be linear between
30 and 500 ng/L, and the detectionlimit of 2-MIB was 12.3 ng/
L, were below its odor threshold (29 ng/L). To test the two
approaches, water samples from Cheng-Chin Lake WaterTreatment
Plant (CCLWTP) in Kaohsiung and Kong-Si Water Treatment
Plant(KSWTP) in Ping-Tung were collected and analyzed. The
panel was able toconduct FPA for all the water samples
collected. The odor groups observed bythe panelmainly
include earthy, fishy, grassy, and chlorine. Based on
theexperiment results of CLSA-GC/MSD, 2-MIB was observed in
CCLWTP for one time,and was observed in KSWTP for almost all the
samples. The concentrations of 2-MIB found were between 46 and
403 ng/L. In addition, samples collected in thetransfer line
and consumers'' houses were also observed to have 2-MIB. The
relation among FPA odor intensity, residual chlorine
concen-trations, and 2-MIB concentrations were also
investigated. The FPA intensityof chlorine odor was found to
correlate with residual chlorine concentration.Although the
earthy odor in water samples can be easily detected by the
FPApanel at the sampling points before chlorine addition,
unlike the laboratorysamples, no strong correlation can be
observed between 2-MIB concentration andassociatd FPA odor
intensity. In addition, no earthy odor was found
withchlorine residual in the samples, as the odor was masked
by the residualchlorine.
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