多環芳香烴化合物（PAHs）為疏水性有機物，因為疏水的特性，容易吸附到其它介質上，因此也造成高生物累積性，加上其高度的生物毒性及致突變性，這類污染物在環境中的傳輸及污染物的處理一直是重要的課題。由於污染物特性的關係，通常是利用活性汙泥來處理，而利用水生植物的處理方式因為其成本低而效用高，已廣受重視。

本研究藉由批次動力學實驗，描述水生植物陽明柳(Najas graminea Del.) 對污染物 acenaphthene (Acp)，fluorene (Flu)，phenanthrene(Phe)及pyrene(Pyr)的吸附行為，並討論不同污染物間的相互作用及植物狀態對吸附現象的影響。由動力學實驗，各種污染物達成平衡的快慢和其疏水性有很大的關係，越疏水的污染物達成平衡的時間越快，動力學常數和污染物的Kow值呈現高度相關。在吸附平衡的部份，植物對各種PAHs的吸附平衡常數也和PAHs的Kow值有高度的相關，表示污染物的疏水性強弱是影響吸附表現的主要因素。在背景污染物的存在下，疏水性強的物種，Pyr便會使植物對目標汙染物的吸附量減少，吸附平衡常數也會降低，但沒有出現大幅的影響，整體的總吸附量也沒有降低的趨勢，疏水性弱的物種Flu，對Phe吸附的影響便不顯著。顯示不同污染物間雖然存在競爭的效應，疏水性越強的污染物競爭能力較強，但並不影響植物整體的吸附表現。將植物烘乾後進行吸附實驗發現烘乾後的植物吸附效能顯著提高，在使用上可以有更多不同的用途及方式，對於採用植物來吸附污染物的應用來說，可以提供更大的使用彈性。

PAHs are hydrophobic organic compounds, which have received considerable attention because of their high bioaccumulation, toxicity, carcinogenicity, and mutagenicity. Because of their hydrophobic characteristics, PAHs intent to adsorb on particles, most of PAHs contained in wastewaters are treated biologically, especially in activated sludge systems. But due to the low construction cost and high efficiency, macrophyte-based treatment systems received increasing attention lately.
In this work, batch experiments were conducted to study the adsorption behaviors between the aquatic plant (Najas graminea Del.) and PAHs aqueous solutions, including acenaphthene (Acp), fluorene (Flu), phenanthrene (Phe) and pyrene (Pyr). The interactions between different PAHs and if the plant conditions affected the adsorption were also discussed. The kinetic studies showed that the more hydrophobic the PAHs are, the faster the equilibriums achieve, The kinetic constants were found to correlate with Kow. Linear adsorption isotherms were observed in all the adsorption experiments. The adsorption equilibrium constants (K) increase with the Kow indicates that the hydrophobicity of the PAHs dominates the adsorption behaviors. The existence of small mount of Pyr could lower the adsorption of Phe on the plant, while Flu couldn’t. Because the hydrophobicity of Flu is too weak to compete with Phe, so the competition was not observed. The plant after dry process had even better performances in both kinetic and adsorption experiments, which provide more flexibility when put this technology into practice.

中文摘要……………… ………………………………………………Ⅰ
Abstract/英文摘要……………………………………..……………….Ⅱ
目錄……………………………………………………….……………..Ⅲ
圖目錄…………………………………………………………Ⅴ
表目錄…………………………………………………...………………Ⅵ
附錄目錄………………………………………………...…………….. Ⅶ
第一章 前言…………………………………………………………….1
第二章 文獻回顧
2-1疏水性污染物於水相及固相間的吸附機制………………...3
2-2 動力學模式…………………………………………………..4
2-3用來描述水相中吸附模式…………………………….…6
2-4 其它材質對PAHs的吸附能力…………………………...7
2-5 植物對PAHs分布及宿命的影響……………………… …..8
2-6 人工溼地的相關研究………………………………………..9
2-7陽明柳的特性……………………………………………….11
第三章 實驗材料及方法
3-1材料………………………………………………………….13
3-2方法
3-2-1批次動力學實驗………………………………………15
3-2-2水相中PAH濃度測定………………………………...15
3-2-3 植物相的PAH濃度-固相萃取流程…………………16
3-2-4植物含水量……………………………………………17
3-3品質管制………………………………..………………...17
第四章 結果與討論
4-1動力學實驗………………………………………………….18
4-2吸附平衡實驗……….……………………………………....22
4-3不同PAHs物種間的相互影響……………………………...26
4-4植物體上的PAHs質量平衡結果 ………………………….31
4-5植物不同部位的吸附作用……… ………………………....32
第五章 結論與建議………………………………………………….. 34
參考文獻………………………………………………………………...36
附錄……………………………………………………………………...40

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