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題名 | 陰離子及非離子界面活性劑對單環芳香烴化合物之吸持及微胞增溶效應=Sorption and Micellar Solubilization of Monocyclic Aromatic Compounds in the Presence of Nonionic and Anionic Surfactants |
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作者 | 董瑞安; 雷文剛; | 書刊名 | 中國環境工程學刊 |
卷期 | 7:3 1997.09[民86.09] |
頁次 | 頁219-227 |
分類號 | 445.463 |
關鍵詞 | 界面活性劑; 單環芳香烴化合物; 臨界微胞濃度; 吸持; 現地復育; Surfactant; Monocyclic aromatic compounds; Critical micellar concentration; Sorption; In-situ remediation; |
語文 | 中文(Chinese) |
中文摘要 | 本研究利用陰離子及非離子性界面活性劑來探討單環芳香烴化合物在水溶液相及 土壤環境中之增溶及吸持(Sorption)效應,以作為添加界面活性劑來增加現地生物復育效 果可行性之評估依準。苯、氯苯及苯乙烯因對人體的致畸及致癌性而被選為本研究之標的污 染物,Triton-X-100(TX-100) 及十二烷基磺酸鈉 (SDS) 則為非離子及陰離子界面活性劑的 典型代表。 研究結果顯示 SDS 及 TX-100 的臨界微胞濃度分別為 2300mg/L 及 267mg/L。 而 SDS 對單環芳香烴化合物的微胞增溶效應則遠大於 TX-100。單環芳香烴化合物的液相濃 度在添加 TX-100 的環境中雖隨界面活性劑添加量的增加而增加,但增溶效應則小於 10%, 但在 SDS 的系統則可增加至 20-43%。在土壤環境的吸持動力方面,當界面活性劑濃度達臨 界微胞濃度時,土壤對芳香烴化合物的吸持幾可達最大飽和吸附值,而 TX-100 系統對土壤 吸持的效果則較 SDS 好。雖然苯乙烯及氯苯在 SDS 系統的吸持有多層吸附的現象,但所有 系統的吸持動力以單層吸附的 Langmuir 方程式均可得良好的模擬結果,其最大飽和吸附容 量介於 323-736u/g 間。在復育工程的應用,添加界面活性劑來降低揮發性單環芳香烴化合 物的揮發,以增加其生物有效性及處理效果是相當可行之復育技術。因應各種疏水性有機污 染物的物化特性,妥慎選擇適切的界面活性劑種類及濃度,將有助於提昇有機污染物的水溶解 度而有效進行受污場址之復育。 |
英文摘要 | A study was conducted on the effect of anionic and nonionic surfactants on the sorption and micellar solubilization of momocyclic aromatic compounds in soil-free and soil-water systems to examine the feasibility of in-situ remediation. Benzene, chlorobenzene, and styrene (BCS) were selected as the target compounds for their suspected carcinogenicities and mutagenicities. Sodium dodecyl sulfate (SDS) and Triton X-100 were used to represent the anionic and nonionic surfactants, respectively. The addition of Triton X-100 had little effect on the solubilization of BCS. In soil-free systems, the effect of the anionic surfactant on the micellar solubilization of BCS was higher than that of the nonionic surfactant. The solubilization of aromatic compounds increased linearly with the increase of SDS concentration. 20% to 43% of enhanced solubilization in the SDS-amended system was demonstrated. The adsorption isotherms of BCS with Triton X-100 can conveniently be fitted by Langmuirian expression. Multilayer adsorption of chlorobenzene and styrene were further observed in SDS-amended systems. Triton X-100 was shown to have a more significant effect on the determination of maximum adsorption capacity than did SDS. Moreover, a correlation between the maximum sorption capacity and partition coefficient was established. Through the proper selection of a suitable type and concentration of surfactant, the results obtained from this study highlighting the use of surfactants as chemical amendments for enhancing sorption and solubilization is feasible for bioremediating soil environments contaminated with monocyclic aromatic compounds. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。