Monthly Archives: juin 2013

Quantification of natural organic matter

Quantification of natural organic matter: caveats and needs

M. Filella1,2

1 Institute F.-A. Forel, Université de Genève, 10 route de Suisse, CH-1290 Versoix, Switzerland
2 SCHEMA, Rue Principale 92, L-6990 Rameldange, Luxembourg

Natural organic matter (NOM) plays an important role in many environmentally-relevant processes. NOM includes many different types of compounds, not all of which behave similarly. Much effort has gone into characterising some fractions of NOM (e.g., humic substances) in the different environmental compartments, in finding tracers to ascertain their origin, etc. –sometimes by using extremely sophisticated techniques–, but no comparable effort has been put into developing quantification techniques. As a result, field studies have often limited themselves to measuring only total (TOC) or dissolved (DOC) organic carbon or some surrogate parameter.

Quantification of NOM fractions in waters is not straightforward. Any analytical method measures a property of an analyte (or its reaction product) but the operationally defined nature of some NOM categories, together with the concomitant elusive and non-constant composition and structure of some of these substances, makes it difficult to find such an intrinsic property for them. Moreover, results have to be expressed as a function of the response of a standard, which is perceived as unsatisfactory by some users and, more importantly, remains largely misunderstood by many.

Four different cases will be discussed:

  • carbohydrates (or “when not all sugar is glucose”),

  • thiols,

  • TEP (a completely operational category),

  • humics’ (the most difficult case?).

The importance of being able to quantify different types of NOM will be discussed in three different fields: thermodynamic modelling of trace element speciation (and implications for their use in ecotoxicology models such as BLM), understanding the fate of natural colloids and nanoparticles in freshwaters, studying long-term trends of NOM concentrations in relation to global climatic change.

IHSS Program

Day 4 – Friday 19 – IHSS Day

IHSS Day 2013

9h00-9h10h

Introduction

9h15-9h35

Julien GUIGUE, Olivier MAMTHIEU, Stéphane MOUNIER, Yves LUCAS, Rémi LAFFONT, Philippe AMIOTTE-SUCHET, Jean LEVEQUE. (IHSS-4)

The use of 3D-Fluorescence and potential biodegradability for the comparison of extraction procedures of water-extractable organic matter in soils

9h35-10h55

Madi ABAKER, Nicola RAPETTI, Stéphane MOUNIER. (IHSS-3)

L’absorption UV-Visible et la spectroscopie de fluorescence indicateurs de suivi de l’évolution des composts de déchets vert.

10h55-10h15

Jean-Pierre GAGNE, Mathieu MILLOUR et Émilien PELLETIER (IHSS-7)

Interactions entre les nanoparticules d’argent et la matière organique dissoute sous des conditions environnementales estuariennes

10h15-11h15

Poster Session – Pause

11h15-12h00

Monserrat FILELLA

Quantification of natural organic matter: caveats and needs

12h00-13h30

Lunch

14h00-14h20

MBA EKOMO Vitalys, MOUNIER Stéphane, TRICHET Jean. (IHSS-5)

Etude de la de matière organique incluse dans les minéraux (phosphate ou ambre) par spectroscopie

14h20-14h40

Ezzhora NKHILIi, Patrycja BOGUTA, Romualda BEJGER, Ghislain GUYOT, Zofia SOKOLOWKA,Claire RICHARD (IHSS-2)

Sensitizing properties of WEOMs extracted from soils

14h40-16h00

General Assembly + Communication – Price

16h00-16h30

Pause

16h30-17h30

General Assembly + Staff meeting

IHSS – Poster list :

IHSS-6

M. FILELLA, S. MOUNIER, F. QUENTEL, J.-C. RODRIGUEZ-MURILLOo.

The need for quantification of natural organic matter:

evaluation of a simple, handheld fluorometer in freshwaters

IHSS-1

Yuzhe GUO, Phuong Than NGUYEN, Caroline BONNOT, Gilles VARRAULT, Marc BENEDETTI, Marie-Ange CORDIER, Edith PARLANTI

Optical Properties of dissolved organic matter in the Sein River Catchment (France).

IHSS-8

Olsen MOULOUBOU, Pascale PRUDENT, Bruno COULOMB, Frederic THERAULAZ

Spectroscopic developments for the study of Soil Organic Matter (SOM) in liquid extracts and on solid phase

IHSS-9

Duc Huy DANG, Véronique LENOBLE, Gaël DURRIEU, Jean-Ulrich MULLOT,
Stéphane MOUNIER and Cédric GARNIER

The porewater size/reactivity model for marine sediment organic matter dynamics: an assessment by UV absorbance and 3D fluorescence

 

Poster Session

P01- ROHIA et al – (Finland) – Characterizing lake DOM across boreal and arctic landscapes

P02- ROYER et al – (France) – Error analysis of low-rank three-way tensor factorization approach to blind source separation

P03- ASSAAD et al – (France) – Characterization of dissolved organic matter in industrial rivers

P04 – GUIGUE et al – (France) – The use of 3D-Fluorescence and potential biodegradability for the comparison of extraction procedures of water-extractable organic matter in soils

P05 – GADIO et al – (France) – Organic matter sources by Time-Resolved Spectra

P06 – DAOUK et al – (Switzerland) – Multiple interactions between the herbicide glyphosate, dissolved organic matter (DOM) and copper in a vineyard environment assessed with UV/Vis fluorescence spectroscopy

P07 – GUYOT et al – (France) – The Triplet States of Dissolved Organic Matter observed by Phosphorescence Spectroscopy at 77 K

P08 – CHIRANJEEVULU et al – (India) – Diel changes of dissolved fluorescence related to microbial activity in the tropical western Bay of Bengal.

P09 -COELHO et al – (France)- Assessing oxydation mechanisms of wine phenolic compounds via fluorescence signatures of composted winery organic matter.

P10 – GAGNE et al – (Canada) – Extraction préparative de substances humiques marines dissoutes des eaux de l’estuaire du Saint-Laurent, Québec, Canada

P11 – GIOVANELA et al – (Brasil) -Fluorescence characteristics of aquatic fulvic and humic acids from varied origins as viewed by excitation/emission matrix (EEM) spectroscopy

P12 -GUO et al – (France) – Optical properties of dissolved organic matter in the Seine river catchment (France).

P13 – GUO et al – (China) – DOM in groundwater_coastal Dagu River watershed