https://scholars.lib.ntu.edu.tw/handle/123456789/408328
標題: | Biosorption of Hg(II) onto goethite with extracellular polymeric substances | 作者: | Song W. Pan X. Mu S. Zhang D. Yang X. Lee D.-J. |
關鍵字: | Chroococcus sp.;Extracellular polymeric substances;Goethite;Mercury | 公開日期: | 2014 | 卷: | 160 | 起(迄)頁: | 119-122 | 來源出版物: | Bioresource Technology | 摘要: | This study characterized the interactions of goethite, EPS from cyanobacterium Chroococcus sp. and Hg(II) using excitation emission matrix (EEM) spectra and adsorption isotherms. Three protein-like fluorescence peaks were noted to quench in the presence of Hg(II). The estimated conditional stability constant (logKa) and the binding constant (logKb) of the studied EPS-Hg(II) systems ranged 3.84-4.24 and 6.99-7.69, respectively. The proteins in EPS formed stable complex with Hg(II). The presence of proteins of Chroococcus sp. enhanced the adsorption capacity of Hg(II) on goethite; therefore, the goethite-EPS soil is a larger Hg(II) sink than goethite alone soil. Biosorption significantly affects the mobility of Hg(II) in goethite soils. ? 2013 Elsevier Ltd. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408328 | ISSN: | 09608524 | DOI: | 10.1016/j.biortech.2013.12.052 |
顯示於: | 化學工程學系 |
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