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標題: | "顆粒狀活性碳於批次反應器及小管柱試驗去除水中內分泌干擾物質和藥物與個人保健用品—以Octylphenol,Caffeine和Carbamazepine為例" Adsorption of EDCs/PPCPs in Aqueous Solution onto Granular Activated Carbon in Batch Reactors and RSSCT – Exemplified by Octylphenol, Caffeine and Carbamazepine |
作者: | Teng-Ting Wang 王騰霆 |
指導教授: | 蔣本基 |
關鍵字: | 顆粒狀活性碳,辛基酚,咖啡因,卡巴氮平,等溫吸附,非競爭,競爭,貫穿曲線,小管柱試驗, GAC,octylphenol,caffeine,carbamazepine,Langmuir isotherm,non-competitive,competitive,Yoon-Nelson model,RSSCT, |
出版年 : | 2013 |
學位: | 碩士 |
摘要: | 近年來內分泌干擾物質以及藥物與個人保健用品存在於自然水體中受到國人及社會的關注。本研究中,以辛基酚、咖啡因、卡巴氮平三種中性化合物為例,利用顆粒狀活性碳(F400)探討汙染物於批次反應器及管柱試驗的吸附行為。在單一物質的溶液中,三個化合物皆符合Langmuir等溫吸附模式,然而在多物質的系統中,需導入校正係數於競爭模式中,來改變汙染物吸附於活性碳上的親和性,透過吸附比率及校正係數的關係,可精確預測汙染物於多物質系統中的吸附量。
於小管柱試驗中,咖啡因與卡巴氮平的貫穿曲線可由Yoon-Nelson模式描述之,而辛基酚可透過更改的Yoon-Nelson模式來表達吸附行為。在單一系統中,由於受到接觸時間的影響,管柱實驗所得到的吸附量會小於Langmuir等溫吸附模式之預測值;另外,辛基酚具有揮發性,因此在三物質的混合系統中,咖啡因與卡巴氮平並不會受到辛基酚如同批次反應器中的競爭,使得由等溫吸附模式得到的預測值會低估兩者的吸附量。 Presence of endocrine disrupting chemicals (EDCs) and pharmaceuticals and personal care products (PPCPs) in the aquatic environment have caused great public health concern in recent years. The purpose of this study is to investigate the adsorption behavior of EDC/PPCPs onto the granular activated carbon, F400. Three neutral target compounds including, octylphenol, caffeine and carbamazepine, were used in this study for conducting the adsorption experiments in both batch reactors and columns. The adsorption data of target compounds were fitted to the Langmuir isotherm in the mono-component systems; however, the correction coefficients needed to be introduced for modifying the competitive isotherm that the affinity of target compounds onto F400 was varied in the multi-component systems. By the relationship of correction coefficients and the fraction adsorbed on the adsorbent, the adsorption capacity could be predict accurately. The breakthrough profiles in RSSCTs were fitted in Yoon-Nelson models for caffeine and carbamazepine, and modified Yoon-Nelson models for octylphenol to evaluate the breakthrough behavior. The GAC adsorption capacity of the columns were found to be less than that predicted by Langmuir isotherm in the mono-component systems mainly due to incomplete contact was provided in the column tests. Moreover, the volatilization of octylphenol caused the difference on competition behaviors that octylphenol was not predominant over the adsorption process. Therefore, the adsorption capacity of caffeine and carbamazepine were underestimated in the column tests because there was no such competition from octylphenol in the tertiary-component systems as the conditions in the batch reactors. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/17479 |
全文授權: | 未授權 |
顯示於系所單位: | 環境工程學研究所 |
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