Distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in sludge organic matter pools as a driving force of their fate during anaerobic digestion

Autor: Claire Cheron, Sabine Houot, Jean-Philippe Steyer, Dominique Patureau, Julie Jimenez, Quentin Aemig, Nadine Delgenès
Přispěvatelé: Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA), Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Jazyk: angličtina
Rok vydání: 2016
Předmět:
anaerobic digestion
[SDV]Life Sciences [q-bio]
0208 environmental biotechnology
digestion anaérobie
organic matter characterization
02 engineering and technology
caractérisation de la matière organique
010501 environmental sciences
Chemical Fractionation
Wastewater
01 natural sciences
Waste Disposal
Fluid
hydrocarbone aromatique polycyclique
Organic matter
Anaerobiosis
Organic Chemicals
Polycyclic Aromatic Hydrocarbons
Waste Management and Disposal
bioaccessibilité
0105 earth and related environmental sciences
micropolluant organique
chemistry.chemical_classification
Biological Oxygen Demand Analysis
Principal Component Analysis
boue d'épuration
Sewage
Chemical oxygen demand
Extraction (chemistry)
3D fluorescence spectroscopy
Biodegradation
spectrométrie de fluorescence
6. Clean water
bioaccessibility
020801 environmental engineering
Anaerobic digestion
Spectrometry
Fluorescence
organic micropollutants
sludge
chemistry
13. Climate action
Environmental chemistry
Polycyclic Hydrocarbons
Sewage treatment
Sludge
Water Pollutants
Chemical
Zdroj: Waste Management
Waste Management, Elsevier, 2016, 48, pp.389-396. ⟨10.1016/j.wasman.2015.11.045⟩
ISSN: 0956-053X
Popis: The fate of organic matter during anaerobic digestion of sewage sludge was studied in batch systems thanks to a sequential chemical fractionation of the particulate phase coupled to fluorescence spectroscopy. Polycyclic Aromatic Hydrocarbons (PAHs) distribution within the organic pools was characterized from their analysis in the residual fraction after each extraction. Both methods were combined to understand the link between PAHs presence in organic pools and their spectral characterization after extraction. Two batch systems (sludge and inoculum mixture) were set up to study the impact of PAHs spiking on their fate and distribution. The sequential fractionation allowed us to extract and characterize about 50% of total Chemical Oxygen Demand. Moreover, fluorescence spectroscopy helped us to understand the organic pools evolution: the most easily extracted pools composed of protein-like molecules were highly degraded meaning that chemical accessibility mimics the bioaccessibility to degrading microorganisms. PAHs were present in all pools of organic matter but native PAHs were mainly present in low accessible (hardly extractable) fractions and during anaerobic digestion, they accumulated in the non-accessible (non extractable) fraction. Spiked PAHs were more dissipated during anaerobic digestion since spiking made them present in more accessible fractions. During the anaerobic digestion, contrary to native PAHs, spiked ones relocated toward less accessible organic fractions confirming the ageing phenomenon. PCA analysis showed that, in spiked mixture, PAHs presence in organic pools is linked to both PAHs physical–chemical properties and quality/quantity of the associated organic pools.
Databáze: OpenAIRE
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