Fluorescence excitation-emission matrix spectra coupled with parallel factor and regional integration analysis to characterize organic matter humification.

TitleFluorescence excitation-emission matrix spectra coupled with parallel factor and regional integration analysis to characterize organic matter humification.
Publication TypeJournal Article
Year of Publication2013
AuthorsHe X-S, Xi B-D, Li X, Pan H-W, An D, Bai S-G, Li D, Cui D-Y
JournalChemosphere
Volume93
Issue9
Pagination2208-15
Date Published2013 Nov
Abstract

The present several humification indexes cannot provide the whole fluorescence information on organic matter composition and the evaluation results from them are inconsistent sometimes. In this study, fluorescence excitation-emission matrix spectra coupled with parallel factor analysis and fluorescence regional integration analysis were utilized to investigate organic matter humification, and the projection pursuit cluster (PPC) model was applied to form a suitable index for overcoming the difficulties in multi-index evaluation. The result showed that the ratio between the volume of humic- and fulvic-like fluorescence region and the volume of protein-like fluorescence region not only revealed the heterogeneity of organic matter, but also provided more accurate information on organic matter humification. In addition, the results showed that the PPC model could be used to characterize integrally the humification, and the projected characteristic value calculated from the PPC model could be used as the integrated humification evaluation index.

DOI10.1093/abbs/gmt079
Alternate JournalChemosphere