Three-dimensional fluorescence spectral characterization of soil dissolved organic matters in the fluctuating water-level zone of Kai County, Three Gorges Reservoir

被引:11
作者
Fang, Fang [1 ]
Yang, Yan [1 ]
Guo, Jinsong [1 ]
Zhou, Hong [1 ]
Fu, Chuan [1 ]
Li, Zhe [1 ]
机构
[1] Chongqing Univ, Minist Educ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Chongqing 400045, Peoples R China
来源
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING IN CHINA | 2011年 / 5卷 / 03期
关键词
water-level-fluctuation zone (WLFZ); soil; dissolved organic matter (DOM); three-dimensional fluorescence spectra; EMISSION MATRIX CHARACTERIZATION; HUMIFICATION INDEX; EXCITATION; AMENDMENTS; NITROGEN; SEA;
D O I
10.1007/s11783-010-0264-4
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Three-dimensional fluorescence spectroscopy was used to investigate the fluorescent properties of soil dissolved organic matter (DOM) in the water-level-fluctuation zone (WLFZ) of Kai County, Three Gorges Reservoir (TGR). Most of the soil DOM analyzed in this study was found to contain four fluorescence peaks. Peaks A and C represent humic-like fluorescence, whereas peaks B and D represent tryptophan-like fluorescence. Peaks E and F, which represent tyrosine-like fluorescence, only appeared in certain soils. Soil humus was the main source of DOM in soil, and higher concentration of soil DOM was found in the exposed soil than submerged soil. Compared to the peaks A and B, the fluorescence intensities of peaks C and D were strongly influenced by the fluctuating water level. Analysis of fluorescence intensities of different peaks in soil DOM showed that WLFZ soil was not contaminated significantly. Soil DOM contained at least two types of humic-like fluorescence groups and two types of protein-like fluorescence groups. The proportion of the content of peak A in soil organic matter was quite stable. The soil DOM in exposed soil had relatively high humification and aromaticity, and periodic submerging and exposure of soil had an impact on the humification of soil DOM.
引用
收藏
页码:426 / 434
页数:9
相关论文
共 24 条
[1]   Fluorescence of leachates from three contrasting landfills [J].
Baker, A ;
Curry, M .
WATER RESEARCH, 2004, 38 (10) :2605-2613
[2]   Fluorescence excitation - Emission matrix characterization of river waters impacted by a tissue mill effluent [J].
Baker, A .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (07) :1377-1382
[3]   Fluorescence excitation-emission matrix characterization of some sewage-impacted rivers [J].
Baker, A .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (05) :948-953
[4]   Effect of topography on the composition of soil organic substances in a perhumid sub-tropical montane forest ecosystem in Taiwan [J].
Chen, JS ;
Chiu, CY .
GEODERMA, 2000, 96 (1-2) :19-30
[5]   CHARACTERIZATION OF DISSOLVED ORGANIC-MATTER IN THE BLACK-SEA BY FLUORESCENCE SPECTROSCOPY [J].
COBLE, PG ;
GREEN, SA ;
BLOUGH, NV ;
GAGOSIAN, RB .
NATURE, 1990, 348 (6300) :432-435
[6]   Characterization of marine and terrestrial DOM in seawater using excitation emission matrix spectroscopy [J].
Coble, PG .
MARINE CHEMISTRY, 1996, 51 (04) :325-346
[7]   Distribution and optical properties of CDOM in the Arabian Sea during the 1995 Southwest Monsoon [J].
Coble, PG ;
Del Castillo, CE ;
Avril, B .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 1998, 45 (10-11) :2195-2223
[8]   Effect of organic amendments on herbicide sorption as related to the nature of the dissolved organic matter [J].
Cox, L ;
Celis, R ;
Hermosín, MC ;
Cornejo, J ;
Zsolnay, A ;
Zeller, K .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (21) :4600-4605
[9]  
DOU S, 2010, SOIL ORGANIC MATTER, P250
[10]  
FU PQ, 2004, THESIS CHINESE ACAD