TY - JOUR
T1 - Spectroscopic characteristics of different molecular weight dissolved organic matter in water from Yangtze River estuary
AU - Huang, Wen Dan
AU - Zhou, Li Min
AU - Zheng, Xiang Min
AU - Huang, Jing
AU - Chen, Shi Ji
PY - 2013/4
Y1 - 2013/4
N2 - Cross flow ultrafiltration systems and three dimensional fluorescence spectrum were used to investigate the fluorescence characterization of different molecular weight dissolved organic matter in water of wet season and dry season from Yangtze River estuary, in order to find out the sources and influencing factors. The results showed that four types of dissolved organic carbon (DOM) fluorescence peaks were observed in the water: humic-like fluorescence peak A and C, and protein-like fluorescence peak B and D. Fluorescent substances mainly existed in the truly dissolved organic matter (UOM, <1 kDa), secondly in low and medium molecular weight of colloidal organic matter (1~500 kDa). Protein of DOM in water mainly originated from anthropogenic sources, then from autochthonous sources. Compared to protein, humic acid of DOM in wet season was both terrigenous and autochthonous sources, while in dry season mainly from terrestrial organic matter. In addition, humic acid in UOM was mainly derived from biological decomposition, however, in colloidal organic matter (COM) came from terrestrial organic matter and was affected by resuspension effects. There was linear correlation between fluorescence intensity and environmental parameters. It was revealed that the complex environmental conditions would influence the fluorescent substance of DOM in water from Yangtze River estuary.
AB - Cross flow ultrafiltration systems and three dimensional fluorescence spectrum were used to investigate the fluorescence characterization of different molecular weight dissolved organic matter in water of wet season and dry season from Yangtze River estuary, in order to find out the sources and influencing factors. The results showed that four types of dissolved organic carbon (DOM) fluorescence peaks were observed in the water: humic-like fluorescence peak A and C, and protein-like fluorescence peak B and D. Fluorescent substances mainly existed in the truly dissolved organic matter (UOM, <1 kDa), secondly in low and medium molecular weight of colloidal organic matter (1~500 kDa). Protein of DOM in water mainly originated from anthropogenic sources, then from autochthonous sources. Compared to protein, humic acid of DOM in wet season was both terrigenous and autochthonous sources, while in dry season mainly from terrestrial organic matter. In addition, humic acid in UOM was mainly derived from biological decomposition, however, in colloidal organic matter (COM) came from terrestrial organic matter and was affected by resuspension effects. There was linear correlation between fluorescence intensity and environmental parameters. It was revealed that the complex environmental conditions would influence the fluorescent substance of DOM in water from Yangtze River estuary.
KW - Colloid
KW - Dissolved organic matter
KW - Three dimensional fluorescence spectrum
KW - Yangtze River estuary
UR - https://www.scopus.com/pages/publications/84876013385
U2 - 10.3964/j.issn.1000-0593(2013)04-1000-05
DO - 10.3964/j.issn.1000-0593(2013)04-1000-05
M3 - 文章
AN - SCOPUS:84876013385
SN - 1000-0593
VL - 33
SP - 1000
EP - 1004
JO - Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
JF - Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
IS - 4
ER -