Non-conservative behaviors of chromophoric dissolved organic matter in a turbid estuary: Roles of multiple biogeochemical processes

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	Non-conservative behaviors of chromophoric dissolved organic matter in a turbid estuary: Roles of multiple biogeochemical processes
	Yang, Liyang ; Guo, Weidong ; Hong, Huasheng ; Wang, Guizhi ; Hong HS(洪华生) ; Guo WD(郭卫东) ; Wang GZ(王桂芝)
刊名	http://dx.doi.org/10.1016/j.ecss.2013.09.007
	2013
关键词	FLUORESCENCE CARBON OCEAN RIVER WATERS CDOM DISSOLUTION PARTICLES SEDIMENTS SORPTION
英文摘要	Fundamental Research Funds for the Central Universities [201112G011]; National Natural Science Foundation of China [40810069004, 41276064, 41006041]; Science Foundation of Fujian Province [2010Y0064]; Chromophoric dissolved organic matter (CDOM) may show notable non-conservative behaviors in many estuaries due to a variety of biogeochemical processes. The partition between CDOM and chromophoric particulate organic matter (CPOM) was examined in the Jiulong Estuary (China) using absorption and fluorescence spectroscopy, which was also compared with microbial and photochemical degradations. The absorption coefficient of water-soluble CPOM (acpom(280)) at ambient Milli-Q water pH (6.1) ranged from Oil to 7.94 m(-1) in the estuary and was equivalent to 5-101% of CDOM absorption coefficient. The acpom(280) correlated significantly with the concentration of suspended particulate matter and was highest in the bottom water of turbidity maximum zone. Absorption spectral slope (S275_295) and slope ratio (SR) correlated positively with salinity for both CPOM and CDOM, suggesting decreases in the average molecular weight with increasing salinity. The adsorption of CDOM to re-suspended sediments (at 500 mg L-1) within 2 h was equivalent to 4-26% of the initial amom(280). The adsorption of CDOM to particles was less selective with respect to various CDOM constituents, while the microbial degradation resulted decreases in S275-295 and SR of CDOM and preferential removal of protein-like components. The partition between CPOM and CDOM represented a rapid and important process for the non-conservative behavior of CDOM in turbid estuaries. (C) 2013, Elsevier Ltd. All rights reserved.
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87928]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Yang, Liyang,Guo, Weidong,Hong, Huasheng,et al. Non-conservative behaviors of chromophoric dissolved organic matter in a turbid estuary: Roles of multiple biogeochemical processes[J]. http://dx.doi.org/10.1016/j.ecss.2013.09.007,2013.
APA	Yang, Liyang.,Guo, Weidong.,Hong, Huasheng.,Wang, Guizhi.,洪华生.,...&王桂芝.(2013).Non-conservative behaviors of chromophoric dissolved organic matter in a turbid estuary: Roles of multiple biogeochemical processes.http://dx.doi.org/10.1016/j.ecss.2013.09.007.
MLA	Yang, Liyang,et al."Non-conservative behaviors of chromophoric dissolved organic matter in a turbid estuary: Roles of multiple biogeochemical processes".http://dx.doi.org/10.1016/j.ecss.2013.09.007 (2013).