.. D. To-dr and P. J. Février, Maddock from the federal university of Niteroi for the sampling campaign and on site help. Part of this work was supported by the CAPES-COFECUB fund

U. K. Ahmad, Z. Ujang, Z. Yusop, and T. L. Fong, Fluorescence technique for the characterization of natural organic matter in river water, Water Science and Technology, vol.46, issue.9, pp.117-125, 2002.

C. A. Andersson and R. Bro, The N-way toolbox for Matlab. Chemometrics and Intelligent Laboratory Systems, pp.1-4, 2002.

A. Baker and R. G. Spencer, Characterisation of dissolved organic matter from source to sea using fluorescence and absorbance spectroscopy. The Science of the Total Environment, pp.1-3, 2004.

C. Barcellos and L. D. Lacerda, Cadmium and zinc source assessment in the Sepetiba Bay and basin region, Environmental Monitoring and Assessment, vol.40, issue.40, pp.183-199, 1994.
DOI : 10.1007/BF00546874

J. Y. Benaim and S. Mounier, Metal transport by organic carbon in the Amazon Basin, Croatica Chemica Acta, vol.71, issue.2, pp.405-419, 1998.
URL : https://hal.archives-ouvertes.fr/hal-01394628

J. Boehme, P. Coble, R. Conmy, and A. Stovall-leonard, Examining CDOM fluorescence variability using principal component analysis: seasonal and regional modeling of three-dimensional fluorescence in the Gulf of Mexico, Marine Chemistry, vol.89, issue.1-4, pp.3-14, 2004.
DOI : 10.1016/j.marchem.2004.03.019

R. Bro, PARAFAC. Tutorial and applications, Chemometrics and Intelligent Laboratory Systems, vol.38, issue.2, pp.149-171, 1997.
DOI : 10.1016/S0169-7439(97)00032-4

R. Bro and H. A. Kiers, A new efficient method for determining the number of components in PARAFAC models, Journal of Chemometrics, vol.398, issue.5, pp.274-286, 2003.
DOI : 10.1002/cem.801

S. E. Cabaniss and M. S. Shuman, Synchronous fluorescence spectra of natural waters: tracing sources of dissolved organic matter, Marine Chemistry, vol.21, issue.1, pp.37-50, 1987.
DOI : 10.1016/0304-4203(87)90028-4

G. P. Coble, Characterization of marine and terrestrial DOM in seawater using excitation-emission matrix spectroscopy, Marine Chemistry, vol.51, issue.4, pp.325-346, 1996.
DOI : 10.1016/0304-4203(95)00062-3

A. M. De-la-peña, N. M. Díez, D. B. Gil, A. C. Olivieri, and G. M. Escandar, Simultaneous determination of flufenamic and meclofenamic acids in human urine samples by second-order multivariate parallel factor analysis (PARAFAC) calibration of micellar-enhanced excitation???emission fluorescence data, Analytica Chimica Acta, vol.569, issue.1-2, pp.250-259, 2006.
DOI : 10.1016/j.aca.2006.03.077

J. C. Esteves-da-silva, M. J. Tavares, and R. Tauler, Multivariate curve resolution of multidimensional excitation???emission quenching matrices of a Laurentian soil fulvic acid, Chemosphere, vol.64, issue.11, pp.1939-1948, 2006.
DOI : 10.1016/j.chemosphere.2006.01.027

N. M. Faber, R. Bro, and P. K. Hopke, Recent developments in CANDECOMP/PARAFAC algorithms: a critical review, Chemometrics and Intelligent Laboratory Systems, vol.65, issue.1, pp.119-137, 2003.
DOI : 10.1016/S0169-7439(02)00089-8

R. P. Galapate, A. U. Baes, K. Ito, T. Mukai, E. Shoto et al., Detection of domestic wastes in Kurose river using synchronous fluorescence spectroscopy, Water Research, vol.32, issue.7, pp.2232-2239, 1998.
DOI : 10.1016/S0043-1354(97)00426-0

R. A. Harshman, Foundations of the PARAFAC procedure: Models and conditions for an "explanatory" multi-modal factor analysis, UCLA Working Papers in Phonetics, vol.16, issue.10, pp.1-84, 1970.

R. A. Harshman, Determination and proof of minimum uniqueness conditions for PARAFAC1. UCLA Working Papers in Phonetics, (UMI Serials in Microform, vol.22, issue.10, pp.111-117085, 1972.

R. A. Harshman and M. E. Lundy, PARAFAC: Parallel factor analysis, Computational Statistics & Data Analysis, vol.18, issue.1, pp.39-72, 1994.
DOI : 10.1016/0167-9473(94)90132-5

R. D. Holbrook, J. H. Yen, and T. J. Grizzard, Characterizing natural organic material from the Occoquan Watershed (Northern Virginia, US) using fluorescence spectroscopy and PARAFAC, Science of The Total Environment, vol.361, issue.1-3, pp.1-3, 2006.
DOI : 10.1016/j.scitotenv.2005.11.020

R. Jaffé, J. N. Boyer, X. Lu, N. Maie, C. Yang et al., Source characterization of dissolved organic matter in a subtropical mangrove-dominated estuary by fluorescence analysis, Marine Chemistry, vol.84, issue.3-4, pp.195-210, 2004.
DOI : 10.1016/j.marchem.2003.08.001

C. S. Karez, V. F. Magalhaes, W. C. Pfeiffer, and G. M. Amado, Trace metal accumulation by algae in Sepetiba Bay, Brazil, Environmental Pollution, vol.83, issue.3, pp.351-356, 1987.
DOI : 10.1016/0269-7491(94)90157-0

P. Kowalczuk, J. Sto-egiert, W. J. Cooper, R. F. Whitehead, and M. J. Durako, Characterization of chromophoric dissolved organic matter (CDOM) in the Baltic Sea by excitation emission matrix fluorescence spectroscopy, Marine Chemistry, vol.96, issue.3-4, pp.3-4, 2005.
DOI : 10.1016/j.marchem.2005.03.002

. Brasil, Mercury distribution and reactivity in waters of a subtropical coastal lagoon, Journal of the Brazilian Chemical Society, vol.12, issue.1, pp.93-98

R. V. Marins, S. Filho, E. V. Lacerda, and L. D. , Atmospheric Deposition of Mercury over Sepetiba Bay, pp.177-180, 1996.

T. M. Miano and N. Senesi, Synchronous excitation fluorescence spectroscopy applied to soil humic substances chemistry. The Science of the Total Environment, pp.41-51, 1992.

J. J. Mobed, S. L. Hemmingsen, J. L. Autry, and L. B. Mcgown, Fluorescence Characterization of IHSS Humic Substances:?? Total Luminescence Spectra with Absorbance Correction, Environmental Science & Technology, vol.30, issue.10, pp.30-3061, 1996.
DOI : 10.1021/es960132l

S. Mounier, L. D. Lacerda, R. V. Marins, and J. Benaim, Copper and Mercury Complexing Capacity of Organic Matter From a Mangrove Mud Flat Environment, pp.519-525, 2001.
URL : https://hal.archives-ouvertes.fr/hal-01394624

T. Ohno and R. Bro, Dissolved Organic Matter Characterization Using Multiway Spectral Decomposition of Fluorescence Landscapes, Soil Science Society of America Journal, vol.70, issue.6, pp.2028-2037, 2006.
DOI : 10.2136/sssaj2006.0005

A. R. Ovalle, C. E. Rezende, L. D. Lacerda, and C. A. Silva, Factors affecting the hydrochemistry of a mangrove tidal creek, Estuarine, Coastal and Shelf Science, issue.5, pp.31-639, 1990.

E. Parlanti, K. Wörz, L. Geoffroy, M. Lamotte, and M. , Dissolved organic matter fluorescence spectroscopy as a tool to estimate biological activity in a coastal zone submitted to anthropogenic inputs, Organic Geochemistry, vol.31, issue.12, pp.31-1765, 2000.
DOI : 10.1016/S0146-6380(00)00124-8

N. Patel-sorrentino, S. Mounier, and J. Benaim, Excitation???emission fluorescence matrix to study pH influence on organic matter fluorescence in the Amazon basin rivers, Water Research, vol.36, issue.10, pp.2571-2581, 2002.
DOI : 10.1016/S0043-1354(01)00469-9
URL : https://hal.archives-ouvertes.fr/hal-01394623

T. Persson and M. Wedborg, Multivariate evaluation of the fluorescence of aquatic organic matter, Analytica Chimica Acta, vol.434, issue.2, pp.179-192, 2001.
DOI : 10.1016/S0003-2670(01)00812-1

J. Riu and R. Bro, Jack-knife technique for outlier detection and estimation of standard errors in PRAFAC models, pp.35-49, 2002.

N. Senesi, T. M. Miano, M. R. Provenzano, and G. Brunetti, CHARACTERIZATION, DIFFERENTIATION, AND CLASSIFICATION OF HUMIC SUBSTANCES BY FLUORESCENCE SPECTROSCOPY, Soil Science, vol.152, issue.4, pp.259-271, 1991.
DOI : 10.1097/00010694-199110000-00004

N. D. Sidiropoulos and R. Bro, On the uniqueness of multilinear decomposition of N-way arrays, Journal of Chemometrics, vol.14, issue.3, pp.229-239, 2000.
DOI : 10.1002/1099-128X(200005/06)14:3<229::AID-CEM587>3.3.CO;2-E

C. A. Stedmon, S. Markager, and R. Bro, Tracing dissolved organic matter in aquatic environments using a new approach to fluorescence spectroscopy, Marine Chemistry, vol.82, issue.3-4, pp.3-4, 2003.
DOI : 10.1016/S0304-4203(03)00072-0

C. A. Stedmon and S. Markager, Behaviour of the optical properties of coloured dissolved organic matter under conservative mixing, Estuarine, Coastal and Shelf Science, vol.57, issue.5-6, pp.1-7, 2003.
DOI : 10.1016/S0272-7714(03)00003-9

C. A. Stedmon and S. Markager, Resolving the variability in dissolved organic matter fluorescence in a temperate estuary and its catchment using PARAFAC analysis, Limnology and Oceanography, vol.50, issue.2, pp.686-697, 2005.
DOI : 10.4319/lo.2005.50.2.0686

O. Trubetskaya, O. Trubetskoj, G. Guyot, F. Andreux, and C. Richard, Fluorescence of soil humic acids and their fractions obtained by tandem size exclusion chromatography???polyacrylamide gel electrophoresis, Organic Geochemistry, vol.33, issue.3, pp.213-220, 2002.
DOI : 10.1016/S0146-6380(01)00153-X

J. L. Vasel and E. Praet, On the use of fluorescence measurements to charaterize wastewater, Water Science and Technology, vol.45, pp.4-5, 2002.

R. G. Zepp, W. M. Sheldon, and M. A. Moran, Dissolved organic fluorophores in southeastern US coastal waters: correction method for eliminating Rayleigh and Raman scattering peaks in excitation???emission matrices, Marine Chemistry, vol.89, issue.1-4, pp.15-36, 2004.
DOI : 10.1016/j.marchem.2004.02.006