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題名 | 結合自營氫細菌與零價鎳去除三氯乙烯之研究=Reductive Dechlorination of Trichlorethylene by Combining Autotrophic Hydrogen-Bacteria and Zero-Valent Iron Particles |
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作者姓名(中文) | 曾四恭; 王上銘; | 書刊名 | 國立臺灣大學工程學刊 |
卷期 | 96 2007.05[民96.05] |
頁次 | 頁83-90 |
專輯 | 環境工程專輯 |
分類號 | 445.6 |
關鍵詞 | 三氯乙烯; 氫自營菌; 脫氯反應; 零價鐵; TCE; Zero-valent iron; Dechlorination; Autotrophic hydrogen bacteria; |
語文 | 中文(Chinese) |
中文摘要 | 本篇報告之研究目的是為了討論結合零價鐵與氫氣自營菌對三氯乙烯(初始濃度為180μmol 1[fed2][fec1])之去除效率以及合併物化及生物 系統所產生之協同效用(synergetic effect)。在單純零價鐵之試驗當中,上部空間為氫氣之實驗組(Fe□/H[feaf])其三氯乙烯去除效率比上部 空間為氮氣之組別(Fe□/H[feaf])增加26.6%的去除效果,鐵粉消耗量(Fe□/H[feaf])也比(Fe□/H[feaf])來的少。這個現象顯示氫氣除了對 零價鐵粉具有相當好的保護作用,也能促進鐵粉以催化反應的方式進行脫氯作用。在零價鐵與氫氣自營菌結合使用的實驗部份,脫氯效果也比 零價鐵和氫氣自營菌單獨使用時好。而這種正面的協同效用是由於硫酸還原菌(sulfate reducing bacteria, SBR)在厭氧狀態下將硫酸根還原為琉 離子後產生之硫化鐵(FeS)造成的。FeS因為具有良好的催化效果,所以可以更快速的去除效率來進行反應。本實驗之最終產物為甲烷、乙烯 以及乙烷,其他的中間產物(如VC及cis-DCE)所測到的含量均非常低。這些現象都顯示結合零價鐵與氫氣自營菌具有相當的應用潛力來進行 受到含氯有機化合物污染廠址之現地復育。 |
英文摘要 | The objective of this study was to evaluate the dechlorination rate (from an initial concentration of 180 μmol per liter) and synergistic effect of combining commercial Fe□ and autotrophic hydrogen-bacteria in the presence of hydrogen during TCE degradation process. In the batch test, the treatment using Fe□ in the presence of hydrogen (Fe□/H[feaf]) showed more effective dechlorination and less iron consumption than Fe□ utilized only (Fe□/N[feaf]), meaning that catalytic degradation had promoted transformation of TCE and the iron was protected by cathodic hydrogen. The combined use of Fe□ and autotrophic hydrogen-bacteria was found to be more effective than did the individual exercise even though the hydrogen was insufficient during the batch test. Crystal of FeS transformed by sulfate reducing bacteria (SRB) was detected on the surface of iron after the combined treatment Because of the better catalytic property than Fe□, FeS strongly accelerated the reaction of combined system. The terminal products of this study were methane, ethane and ethane (the concentration of intermediates such as vinyl chloride and cis-DCE was very low). Results from batch experiments revealed that the proposed combined method has the potential to become a cost-effective remediation technology for the chlorinated-solvent contaminated site. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。