Current trends and advances in analytical techniques for the characterization and quantification of biologically recalcitrant organic species in sludge and wastewater: A review

Faixo, Sylvain; Gehin, Nicolas; Balayssac, Stéphane; Gilard, Véronique; Mazeghrane, Sofiane; Haddad, Mathieu; Gaval, G.; Paul, Etienne; Garrigues, Jean‐Christophe

doi:10.1016/j.aca.2021.338284

Cited by 21 publications

(3 citation statements)

References 195 publications

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“…The flow rate was 0.3 mL min −1 , and 1 μL of each extract was injected. In positive mode, the basic chemical functional groups that are most frequently ionized include basic nitrogen (pyridinic), furans, and inorganic cations, while in negative mode, neutral nitrogen (pyrrole), carboxylic acids, and inorganic anions are preferably ionized (De Vijlder et al 2018 ; Steckel and Schlosser 2019 ; Faixo et al 2021 ). Therefore, the mass spectrometric analyses were performed in this study with the electrospray ionization source (ESI) in both negative and positive modes to achieve broader detection and compound identification in each spectrum and thus perform a more comprehensive metabolomic analysis of this plant species.…”

Section: Methodsmentioning

confidence: 99%

The use of ecological analytical tools as an unconventional approach for untargeted metabolomics data analysis: the case of Cecropia obtusifolia and its adaptive responses to nitrate starvation

Cadena-Zamudio

Monribot‐Villanueva

Pérez-Torres

et al. 2022

Funct Integr Genomics

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Plant metabolomics studies haves revealed new bioactive compounds. However, like other omics disciplines, the generated data are not fully exploited, mainly because the commonly performed analyses focus on elucidating the presence/absence of distinctive metabolites (and/or their precursors) and not on providing a holistic view of metabolomic changes and their participation in organismal adaptation to biotic and abiotic stress conditions. Therefore, spectral libraries generated from Cecropia obtusifolia cell suspension cultures in a previous study were considered as a case study and were reanalyzed herein. These libraries were obtained from a time-course experiment under nitrate starvation conditions using both electrospray ionization modes. The applied methodology included the use of ecological analytical tools in a systematic four-step process, including a population analysis of metabolite α diversity, richness, and evenness (i); a chemometrics analysis to identify discriminant groups (ii); differential metabolic marker identification (iii); and enrichment analyses and annotation of active metabolic pathways enriched by differential metabolites (iv). Our species α diversity results referring to the diversity of metabolites represented by mass-to-charge ratio (m/z) values detected at a specific retention time (rt) (an uncommon way to analyze untargeted metabolomic data) suggest that the metabolome is dynamic and is modulated by abiotic stress. A total of 147 and 371 m/z_rt pairs was identified as differential markers responsive to nitrate starvation in ESI− and ESI+ modes, respectively. Subsequent enrichment analysis showed a high degree of completeness of biosynthetic pathways such as those of brassinosteroids, flavonoids, and phenylpropanoids.

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Section: Methodsmentioning

confidence: 99%

The use of ecological analytical tools as an unconventional approach for untargeted metabolomics data analysis: the case of Cecropia obtusifolia and its adaptive responses to nitrate starvation

Cadena-Zamudio

Monribot‐Villanueva

Pérez-Torres

et al. 2022

Funct Integr Genomics

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“…However, these might be considered valuable organic chemicals. This also frequently applies to inorganic substances (Djandja et al, 2020;Faixo et al, 2021). Recovery and prac-tical reuse of important substances is a key component of sustainable treatment, as is minimizing any potential negative effects on the environment and human beings.…”

Section: Composition Of Sewage Sludgementioning

confidence: 99%

A comprehensive review on sewage sludge as sustainable feedstock for bioenergy production

Gizaw,

Periyasamy,

Redda

et al. 2023

Environmental Quality Mgmt

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The greatly rising amounts of sewage sludge from different sources are causing severe concerns around the globe. Disposal of sewage sludge is exceptionally difficult and poses serious environmental problems due to the significant quantity of toxic heavy metals and organic contaminants in its constituents. This review provides an overview of different conversion methods of sewage sludge into energy, that is, pyrolysis, hydrothermal gasification, hydrothermal liquefaction, hydrothermal carbonization, anaerobic digestion, and transesterification. It also focuses on each conversion route's state‐of‐the‐art research advances, features, and drawbacks to ensure financial and ecological responsibility. The detailed descriptions of the methods and respective energy generation could help scholars and industrialists produce energy from sewage sludge to keep the environment harmless.

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“…Several analytic techniques have been used to characterize and quantify these compounds, such as UV-Vis, fluorescence spectroscopy (emission/excitation matrix), infrared (IR) spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy, among many others [15]. However, IR spectroscopy has gained increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Formation of Recalcitrant Compounds during Anaerobic Digestion of Thermally Pre-Treated Sludge: A Critical Macromolecular and Structural Study

Ortega-Martínez

Chamy

Jeison

2022

IJERPH

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Thermal hydrolysis, when used as pre-treatment, enhances the anaerobic digestion of sewage sludge; moreover, due to the high temperature normally applied, undesirable recalcitrant compounds via Maillard reactions may also be formed. However, although the appearance of these recalcitrant compounds is widely reported, more information on the formation, structure, and fate of these compounds is still needed. This study was focused on understanding the amount and whereabouts of such compounds during the anaerobic digestion process with thermal pre-treatment in soluble and total phase and advance in its structural identification by analyzing their infrared (IR) spectra. It was found that, even with the improved methane production and COD degradation, at 165 °C for 30 min, humic-like compounds are formed which could not be degraded at the anaerobic digestion step. These compounds account for 25% of the original sludge. Infrared spectroscopy proved to be a powerful technique, permitting their differentiation from the natural humic-like compounds. This research provides new information about the structure of melanoidins at every stage of the thermal hydrolysis pre-treatment and how they contribute to the dissolved organic nitrogen.

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Current trends and advances in analytical techniques for the characterization and quantification of biologically recalcitrant organic species in sludge and wastewater: A review

Cited by 21 publications

References 195 publications

The use of ecological analytical tools as an unconventional approach for untargeted metabolomics data analysis: the case of Cecropia obtusifolia and its adaptive responses to nitrate starvation

The use of ecological analytical tools as an unconventional approach for untargeted metabolomics data analysis: the case of Cecropia obtusifolia and its adaptive responses to nitrate starvation

A comprehensive review on sewage sludge as sustainable feedstock for bioenergy production

Formation of Recalcitrant Compounds during Anaerobic Digestion of Thermally Pre-Treated Sludge: A Critical Macromolecular and Structural Study

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