臺灣博碩士論文加值系統

本研究主要探討氯酚類化合物對不同吸附劑之吸附反應。所使用氯酚類化
合物包括：2,4-二氯酚、2,6-二氯酚、2,4,6-三氯酚與五氯酚四種。而吸
附劑則為蒙特土及三氧化二鋁(AlO)，進而研究腐植酸與不同pH值下之界
面活性劑(Triton X-100、Brij-35、SDS)對氯酚類化合物在蒙特土表面吸
附反應之效應，並由氯酚類化合物與界面活性劑在蒙特土溶液中之界達電
位(zeta-potential)來預測其吸附行為。結果顯示在不同吸附劑中，氯酚
類化合物的吸附量皆隨著氯酚類化合物之疏水係數(Kow) 增加而增加，亦
隨著氯酚類化合物之氯取代基增多而提高，由此可推論此吸附反應之可能
驅動力為疏水性作用力(hydrophobic interaction) 。當加入腐植酸(50
毫克/升) 及界面活性劑濃度低於臨界微胞濃度(CMC) 時，都會增加氯酚
類化合物之吸附量。再由熱力學之觀點來看，其自由能變化皆為負值 (△
G＜0)，可知此吸附反應為一自發反應。

The characteristics of the adsorption reaction of chlorophenols
on hydrous montmorillonite and AlO were investigated. The
effects of surfactants and humic acid on the adsorption of
chlorophenols,under acidic and alkaline pH ranges at montmori-
llonite/electrolyte interfaces were examined. Three types of
surfactant :Triton X-100, Brij-35 and SDS were used. Chloro-
phenols,such as, 2,4-dichlorophenol、2,6-dichlorophenol、2,4,6-
trichlorophenol were studied. Through electrokinetic and batch
adsorption studies, we investigated the adsorption mechanism of
chlorophenols. It was found that the adsorption of chloro-
phenols increased when octanol/water coefficient of chloro-
phenol(Kow) increased.The adsorption on solid/water interface
increased with increasing number of substituent groups. It was
therefore proposed that the major driving force of these reac-
tions was hydorphobic interaction.For 2,6-chlorophenol, the
adsorption increased in the presence of humic acid. The adsorp-
tion also increased in the presence of surfactant. Additionally
,we calculatedthe free energy change(△G) of these adsorption
reaction. Thenegative free energy change indicated were
spontaneous.