Tracing organic matter removal in polluted coastal waters via floating bed phytoremediation

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• 作者：Lingfeng Huang^a ; ^b ; Jianfu Zhuo^a ; Weidong Guo^a ; ^b ; ^{wdguo@xmu.edu.cn} ; Robert G.M. Spencer^c ; Zhiying Zhang^a ; Jing Xu^a
• 关键词：Phytoremediation ; Floating beds ; Organic pollution ; Fluorescence EEM ; Parallel factor analysis ; Sesuvium portulacastrum
• 刊名：Marine Pollution Bulletin
• 出版年：2013
• 出版时间：15 June, 2013
• 年：2013
• 卷：71
• 期：1-2
• 页码：74-82
• 全文大小：1389 K

文摘

Organic matter removal by cultured Sesuvium portulacastrum in constructed floating beds was studied during a 20 day greenhouse experiment and an 8 month field campaign in the polluted Yundang Lagoon (southeastern China). Experiments were traced via dissolved organic carbon (DOC) concentration, fluorescence excitation-emission matrix and absorption spectroscopy. Two ¡®terrestrial¡¯ humic-like, one ¡®marine¡¯ humic-like and one protein-like components were identified by parallel factor analysis. The ¡®terrestrial¡¯ humic-like and protein-like components, DOC and absorption coefficient (a280) decreased during the greenhouse experiment. The intensities of four fluorescence components were all reduced during the field experiment. These results demonstrate the clear potential of floating bed phytoremediation techniques for reducing organic pollution degree in brackish environments. The rhizosphere may play an important role during phytoremediation. Our results show that spectrophotometric measurements such as fluorescence provide a useful tool for examining the removal of different organic moieties during various bioremediation processes.