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研究生:吳明傑
研究生(外文):Wu, Ming-Chien
論文名稱:Fenton試劑改善化學混凝去除三鹵甲烷有機前質之研究
論文名稱(外文):Removal of Trihalomethane Organic Precusors by Fenton's Reagent- Enhanced Chemical Coagulation
指導教授:許聖哲許聖哲引用關係
指導教授(外文):Sheng-Che Hsu
學位類別:碩士
校院名稱:淡江大學
系所名稱:水資源及環境工程學系
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:1996
畢業學年度:84
語文別:中文
論文頁數:89
中文關鍵詞:混凝三鹵甲烷生成潛能腐質酸
外文關鍵詞:Fenton法coagulationFentonTHMFPphenolhumic acid
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由於台灣地區水源水質正逐漸惡化,傳統處理程序所處理之水質已漸
不符所需,應用高級處理程序於淨水處理必為趨勢。本研究探討同時兼具
氧化及混凝效果之Fenton高級氧化法,視其對有機物與濁度去除之效果,
實驗中以腐質酸與酚分別模擬水中高分子量與低分子量有機物,高嶺土模
擬水中懸浮物質,以瓶杯實驗分別探討:1)各種混凝劑,包括硫酸亞鐵、
氯化鐵、多元氯化鋁之加藥量對混凝去除有機物與濁度之比較,2)pH、過
氧化氫加藥量、亞鐵加藥量對 Fe2+/H2O2程序去除高分子量,低分子量有
機物與濁度之影響,並與傳統混凝做一比較。3)三價鐵對 Fe2+/H2O2程序
配合三價鐵混凝去除高分子量與低分子量有機物與濁度之影響。4)三鹵甲
烷生成潛能與替代指標DOC、UV254之相關性。化學混凝去除酚的效果約只
有20%,酚的去除需依靠Fe2+/H2O2程序所生成之氫氧自由基,將之氧化去
除。於不同pH(3.0,4.0,5.0)時,Fe2+/H2O2程序氧化酚之效果隨pH之降低
而去除效果更為佳;隨亞鐵加藥量之增加,其去除效果亦佳,但當亞鐵過
量時,亞鐵易干擾氫氧自由基之氧化作用;過氧化氫加量之增加亦可有效
改善 Fe2+/H2O2程序去除酚之效果。於高嶺土與酚之人工原水系統中,
TTHMFP之去除與酚去除趨勢相同,因此推斷酚是主要生成三鹵甲烷之有機
前質,其經氧化後之產物較不易生成三鹵甲烷。水中腐質酸大分子物質,
主要是依靠化學混凝去除之。於pH為5.0時,Fe2+/H2O2程序去除腐質酸亦
是以混凝方式為主,氧化去除效果不佳。化學混凝劑混凝去除腐質酸與濁
度於pH為 5.0時,所需加藥量之大小順序為二價鐵>三價鐵> PAC,過氧化
氫加入對三價鐵混凝沒有幫助,但可有效減少亞鐵混凝所需之加藥量,但
仍較三價鐵混凝所需加藥量多。三鹵甲烷生成潛能之殘留則隨著腐質酸被
混凝去除而減少,且發現鐵鹽混凝時,混凝劑會先和腐質酸中易生成THMs
之成份形成複合物去除之。濁度之去除需等到腐質酸被去除之後,且懸浮
物質之存在有助於腐質酸之混凝去除。於pH為5.0時,Fe2+/H2O2程序配合
三價鐵混凝三價鐵加入有助於 Fe2+/H2O2程序混凝去除腐質酸,同時更能
發揮其氧化酚之效果,對三鹵甲烷之去除亦具不錯之效果,是一項值得再
深入探討之方法。當水體中腐質酸佔大多數時,TTHMFP與替代指標DOC、
UV254之相關性良好;含酚時,其相關性變差,由此可知,替代指標之使
用與水體中有機物性質息息相關。

The objective of this research is to discuss the removal
efficient of org-anic substances and turbidity by Fenton process
which is one of the advancedoxidation process(AOPs) with both
coagulation and oxidation function.This stu-dy used humic acid(
HA),phenol and kaolin to simulate the high-molecular-weight,low-
molecular-weight organic substances and turbidity.The method of
experime-nt is jar test.The discussed terms of the study are as
following:1. How is theremoval of organic substances and
turbidity influenced by different coagulantsdosage(Fe2SO4,FeCl3,
PAC).2.How do pH, the dose of hydrogen peroxide and ferro-us
iron influence the removal of HA,phenol and turbidity by
Fenton's Reagent.3.How does the ferric dosage influence the
removal of HA ,phenol and turbidityby Fnton's Reagent-Enhanced
ferric coagulation. 4. The relation between thesurrogate
parameter (DOC,UV254) and trihalomethane formation potential(
THMFP).The removal of phenol by chemical coagulation is about
20%. However, it can beremoved effectively by oxidation of
Fenton's Reagent. The removal of phenol byFenton's Reagent
increased with decreased pH,increased ferrous dosage and inc-
reased hydrogen peroxide. Ferrous iron will interfere the
oxidation funtion ofhydroxyl radicals when it is over dosage. In
the synthetic raw water of kaolinand phenol,the removal tendency
of THMFP is the same with phenol.Therefore,ph-enol is the major
THMs organic precusor of this system, and its product is noteasy
to form THMs after oxidation.The removal of HA depends on
chemical coagu-lation,not oxidation.The order of the needed
coagulant dosage is ferrous>ferr-ic>PAC when pH is 5.0. The
addition of hydrogen peroxide reduced the coagulantdosage of
ferrous iron,but the dose is still more than that of ferric
iron.Theresidual of THMFP decreases with the removal of HA. The
turbidity was removedafter HA has been removed,and the mineral
clay suspention can help the coagul-ation of HA.When pH is
5.0,the addtion of ferric iron can help the coagulationof
Fenton's Reagent with the removal of HA. Beside, the removal of
phenol andTHMFP can be more effective.When most of water organic
substance is HA,the re-lation between THMFP and surrogate
parameter of DOC,UV254 is good.But it beco-mes bad when it
contain more phenol. Therefore,the used of surrogate parameterin
water treatment relates with the quality of organic substances
in natual w-ater.

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