期刊論文
| 學年 | 87 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 1999-03-01 |
| 作品名稱 | Influence of Chlorination on Chromophores and Fluorophores in Humic Substances |
| 作品名稱（其他語言） | |
| 著者 | Korshin, Gregory V.; Kumke, Michael U.; 李奇旺; Li, Chi-wang; Frimmel, Fritz H. |
| 單位 | 淡江大學水資源及環境工程學系 |
| 出版者 | American Chemical Society (ACS) |
| 著錄名稱、卷期、頁數 | Environmental science and technology 33(8), pp.1207-1212 |
| 摘要 | Three types of fluorophores (decay times 1.2, 4.3, and 10.7 ns, respectively) participate in the fluorescence of Suwannee River hydrophobic acid (HPOA). The emission of the fast-decaying fluorophores (FDF) is red-shifted compared with that of longer-decaying groups. Upon chlorination, the FDF contribution (IFDF) to the emission declines, the specific absorbance at 254 nm (SUVA254) decreases, and the electron-transfer absorbance band in the UV spectra of HPOA contracts. On the basis of the literature data and experimental evidence, the width of the electron-transfer absorbance band (ΔET) is found to be proportional to the gyration radii (Rg) of the humic molecules. The Rg values of chlorinated HPOA are also well-correlated with the energy of the emission band maximum (Emax) and emission bandwidth (Δem). These consistent changes reflect the destruction of aromatic halogen attack sites accompanied by the breakdown of the humic molecules into smaller fragments. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0013-936X |
| 期刊性質 | 國內 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44689 ) |