EPA-93-U1U1-03-107

093

1,350 千元

2004/12/30

2005/11/30

張裕釧

永續發展室(停用)

財團法人生物技術開發中心 張裕釧

科技計畫

奈米金,苯,一氧化碳,一氧化氮,無氧氨氮氧化反應,,,,,

nanogold,benzene,carbon monoxide,nitrogen monoxide,anammox

張裕釧

02 26956933 轉 1516

ycjang@mail.dcb.org.tw

本研究應用台灣舊礦區篩得的奈米金轉化菌株生產生物性的奈米金材料，並與其他製程所得到的奈米金材料進行功能上的比較，以了解生物性奈米金和其他金奈米材料在污染防治上的應用潛力，在空氣污染物的評估結果顯示苯的降解效能以參考性金奈米材料最為明顯(50％)，甲苯的降解效能則以化學法生產的奈米金和TiO2結合最為明顯(41％)，二甲苯的降解效能則以物理法生產的奈米金和TiO2結合最具明顯效果(40％)。大部分的材料對甲醛都可達到50％的去除率，一氧化氮的去除能力則以化學性和生物性的奈米金較佳，對二氧化氮的去除則以單一材料中的物理性奈米金最好，生物性奈米金則毫無反應。而一氧化碳的去除則以參考性材料最理想。奈米金對污染物的去除能力同時可在機車廢氣的去除評估中被觀察到，唯各材料對廢氣中污染物的去除能力和單一污染物下的測試結果有所差異。生物性奈米金對Escherichia coli及Salmonella choleraesuis的抑菌能力在反應24小時幾乎已達到100％，其他奈米材料則無此現象，對於脫氮反應的影響在有奈米材料存在下普遍產生了抑制性的作用，其中較時別的現象是生物性奈米金可促進脫硝反應的進行，可使脫硝反應的時間由原先的4天縮短成3天，而在氨氮無氧氧化反應的系統中則可以加快系統中亞硝酸氮的去除。綜合本研究結果，顯示奈米金材料值得開發的領域仍很廣泛，值得於研究的深度和廣度上再進一步進行系統性的探討。

奈米金,苯,一氧化碳,一氧化氮,無氧氨氮氧化反應,,,,,

0000115126.pdf

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[期末報告]公開完整版

2006/1/1 上午 12:00:00

In this study, we evaluated the potentiality of air pollution control using biologically transformed nano-sized gold particles, which mediated by microorganism isolated from abandoned mining area, chemically synthesized and commercial nano-sized gold particles. For air pollutant control, the results showed that the reference material could remove 50% of benzene; chemically transformed nanogold mixed with TiO2 could remove 41% of toluene;，physically transformed nanogold mixed with TiO2 could remove 41% of xylene. Most of the tested nano-particles could remove more than 50% of formaldehyde. Biologically and chemically transformed nanogold produced the best result for nitrogen monoxide reduction. For carbon monoxide oxidation, the reference material showed the best result. All the pollutant removing results were also observed in the test, which used the motorcycle exhausted gas as the pollutant source. There were differences of the pollutant-removing rate and the ability between the single pollutant system and the motorcycle exhausted gas. There was no antimicrobial activity for Escherichia coli (BCRC16081) and Salmonella choleraesuis (BCRC10747) in 48-hour test with the physically and chemically transformed nanogold particles, but the biologically transformed nanogold significantly inhibited the bacterial growth. Most of the tested nanoparticles inhibited the nitrogen removing reaction, but the biologically transformed nanogold could shorten the time of de-nitrification from 4 days to 3 days and could also increase the de-nitrification rate in the anammox reaction tested system. All the results showed that the nonogold materials have created some new application field. For successful application of the nanogold in the environmental protection, it is necessary to do the more researches to understand the mechanisms of the pollutant removing reactions.

nanogold,benzene,carbon monoxide,nitrogen monoxide,anammox