Preparation and characterisation of raw chars and physically activated carbons derived from marine Posidonia oceanica (L.) fibres

Ncibi, Mohamed Chaker; Jeanne-Rose, Valérie; Mahjoub, Borhane; Jean-Marius, Corine; Lambert, Jacques; Ehrhardt, J.J.; Bercion, Y.; Seffen, Mongi; Gaspard, Sarra

doi:10.1016/j.jhazmat.2008.09.126

Cited by 84 publications

(29 citation statements)

References 34 publications

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“…Elemental analysis and proximate analysis of the sargassum presented in Table 1 revealed that sargassum has high carbon content and low ash content, indicating that sargassum is suitable for the preparation of AC with high yield. Besides, sargassum has relatively higher nitrogen content compared with those activated carbon precursors reported previously, such as wheat-straw [10], rice straw [11], and marine posidonia oceanica [12] with nitrogen content of 0.44%, 0.65%, and 1.52%, respectively. Since nitrogen functional groups are active species of AC-based catalyst in the SCR reactions at low temperatures [2,13], it is expected that there is a relatively high concentration of nitrogen functional groups on the surface of the SAC samples as prepared.…”

Section: Methodsmentioning

confidence: 71%

Utilization of sargassum based activated carbon as a potential waste derived catalyst for low temperature selective catalytic reduction of nitric oxides

Tan

Shi

et al. 2015

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Section: Methodsmentioning

confidence: 71%

Utilization of sargassum based activated carbon as a potential waste derived catalyst for low temperature selective catalytic reduction of nitric oxides

Tan

Shi

et al. 2015

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“…An aliquot of ground sample (10 mg) was placed in a platinum cup and heated under N 2 (gas flow 100 mL min −1 ) at 10°C min −1 (Yang et al, 2006; Ncibi et al, 2009) to 600°C. Universal Analysis software (TA Instruments) was used to aid the identification and quantification of mass loss within specific temperature intervals.…”

Section: Methodsmentioning

confidence: 99%

A Global Assessment of the Chemical Recalcitrance of Seagrass Tissues: Implications for Long-Term Carbon Sequestration

et al. 2017

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Seagrass ecosystems have recently been identified for their role in climate change mitigation due to their globally-significant carbon sinks; yet, the capacity of seagrasses to sequester carbon has been shown to vary greatly among seagrass ecosystems. The recalcitrant nature of seagrass tissues, or the resistance to degradation back into carbon dioxide, is one aspect thought to influence sediment carbon stocks. In this study, a global survey investigated how the macromolecular chemistry of seagrass leaves, sheaths/stems, rhizomes and roots varied across 23 species from 16 countries. The goal was to understand how this seagrass chemistry might influence the capacity of seagrasses to contribute to sediment carbon stocks. Three non-destructive analytical chemical analyses were used to investigate seagrass chemistry: thermogravimetric analysis (TGA) and solid state 13C-NMR and infrared spectroscopy. A strong latitudinal influence on carbon quality was found, whereby temperate seagrasses contained 5% relatively more labile carbon, and tropical seagrasses contained 3% relatively more refractory carbon. Sheath/stem tissues significantly varied across taxa, with larger morphologies typically containing more refractory carbon than smaller morphologies. Rhizomes were characterized by a higher proportion of labile carbon (16% of total organic matter compared to 8–10% in other tissues); however, high rhizome biomass production and slower remineralization in anoxic sediments will likely enhance these below-ground tissues' contributions to long-term carbon stocks. Our study provides a standardized and global dataset on seagrass carbon quality across tissue types, taxa and geography that can be incorporated in carbon sequestration and storage models as well as ecosystem valuation and management strategies.

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“…The leaves consist primarily of polysaccharides (roughly 60%, two thirds of which corresponds to holocellulose), and the remaining material is largely composed of various phenolic constituents, more specifically lignin, tannin and free and ester-bound phenolic acids (Zapata and McMillan 1979;Agostini et al 1998;Arnold and Targett 2002;Torbatinejad et al 2007). Reported lignin contents of P. oceanica leaves and agaepropili are in the range of 25-30% of their dry weight (Ncibi et al 2009;Khiari et al 2010;Bettaieb et al 2015). However, this is operationally defined Klason lignin (acid-insoluble residues), only a small portion of which corresponds to "true" polyphenolic lignin (Klap et al 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Tannins stored in tannin cells 1 It is worth mentioning here that this P. oceanica beach material causes annoying flies, odours and beach size reduction in touristic areas along the Mediterranean coast, and associated expenditure on removal (Khiari et al 2010;Simeone and De Falco 2012;Plis et al 2014). On the other hand, it is a potential feedstock for biofuel, animal fodder, cellulose and activated charcoal (Torbatinejad et al 2007;Ncibi et al 2009;Coletti et al 2013;Bettaieb et al 2015), even though the ecological consequences of such usages have not been assessed. Knowledge on the molecular composition of Posidonia raw materials is obviously valuable to these potential future applications.…”

Section: Introductionmentioning

confidence: 99%

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

et al. 2016

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Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat.Aquatic Botany http://dx.doi.org/10. 1016/j.aquabot.2016.05.009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Graphical abstract Highlights-Analytical pyrolysis applied to Posidonia seagrass organs and marine mat deposit -Posidonia phenolic composition dominated by p-hydroxybenzoic acids -Peat-like mat deposits composed predominantly of root, rhizome and sheath materials -We suggest a link between Posidonia chemistry and C accumulation in mats AbstractPosidonia oceanica forms extensive peat-like deposits (mats) in Mediterranean coastal waters, which have a potential as carbon sinks and archives of environmental change.Nonetheless, the organic chemistry of both P. oceanica plant materials, as well as the environmental and diagenetic effects on the composition of its detritus, is poorly understood.We analyzed plant organs of P. oceanica and the coarse organic matter from a mat core spanning 750 yrs using pyrolysis techniques (PY-GC-MS and THM-GC-MS) to improve our understanding of their molecular properties and their preservation upon mat development. It

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Preparation and characterisation of raw chars and physically activated carbons derived from marine Posidonia oceanica (L.) fibres

Cited by 84 publications

References 34 publications

Utilization of sargassum based activated carbon as a potential waste derived catalyst for low temperature selective catalytic reduction of nitric oxides

Utilization of sargassum based activated carbon as a potential waste derived catalyst for low temperature selective catalytic reduction of nitric oxides

A Global Assessment of the Chemical Recalcitrance of Seagrass Tissues: Implications for Long-Term Carbon Sequestration

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

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