Lingfeng Huang,

Jianfu Zhuo, Weidong Guo, Robert G.M. Spencer, Zhiying Zhang, Jing Xu.Marine

Pollution Bulletin, 2013, 71:74–82

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.

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