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Mnafki R, Morales A, Sillero L, Khiari R, Moussaoui Y, Labidi J. Integral Valorization of Posidonia oceanica Balls: An Abundant and Potential Biomass. Polymers (Basel) 2024; 16:164. [PMID: 38201829 PMCID: PMC10780897 DOI: 10.3390/polym16010164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 12/26/2023] [Accepted: 12/29/2023] [Indexed: 01/12/2024] Open
Abstract
Posidonia oceanica balls (POB), a kind of seagrass, are a significant environmental issue since they are annually discharged onto beaches. Their current usefulness limits interest in their management and enhances the environmental problem. Therefore, in this research, the potential of this lignocellulosic biomass was studied from a holistic biorefinery point of view. To this end, an in-depth study was carried out to select the best pathway for the integral valorization of POBs. First, an autohydrolysis process was studied for the recovery of oligosaccharides. Then, a delignification stage was applied, where, in addition to studying different delignification methods, the influence of the autohydrolysis pre-treatment was also investigated. Finally, cellulose nanofibers (CNFs) were obtained through a chemo-mechanical treatment. The results showed that autohydrolysis not only improved the delignification process and its products, but also allowed the hemicelluloses to be valorized. Acetoformosolv delignification proved to be the most successful in terms of lignin and cellulose properties. However, alkaline delignification was able to extract the highest amount of lignin with low purity. CNFs were also successfully produced from bleached solids. Therefore, the potential of POB as a feedstock for a biorefinery was confirmed, and the pathway should be chosen according to the requirements of the desired end products.
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Affiliation(s)
- Rim Mnafki
- Organic Chemistry Laboratory (LR17ES08), Faculty of Sciences of Sfax, Sfax 3018, Tunisia
- Faculty of Sciences of Gafsa, University of Gafsa, Gafsa 2112, Tunisia
| | - Amaia Morales
- Biorefinery Processes Research Group, Department of Chemical and Environmental Engineering, University of Basque Country (UPV/EHU), 20018 Donostia-San Sebastian, Spain
| | - Leyre Sillero
- Biorefinery Processes Research Group, Department of Chemical and Environmental Engineering, University of Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
| | - Ramzi Khiari
- Department of Textile, Higher Institute of Technological Studies (ISET) of Ksar-Hellal, Ksar-Hellal 5070, Tunisia
- CNRS, Grenoble INP, LGP2, University of Grenoble Alpes, 38000 Grenoble, France
| | - Younes Moussaoui
- Organic Chemistry Laboratory (LR17ES08), Faculty of Sciences of Sfax, Sfax 3018, Tunisia
- Faculty of Sciences of Gafsa, University of Gafsa, Gafsa 2112, Tunisia
| | - Jalel Labidi
- Biorefinery Processes Research Group, Department of Chemical and Environmental Engineering, University of Basque Country (UPV/EHU), 20018 Donostia-San Sebastian, Spain
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Restaino OF, Giosafatto CVL, Mirpoor SF, Cammarota M, Hejazi S, Mariniello L, Schiraldi C, Porta R. Sustainable Exploitation of Posidonia oceanica Sea Balls (Egagropili): A Review. Int J Mol Sci 2023; 24:ijms24087301. [PMID: 37108463 PMCID: PMC10138933 DOI: 10.3390/ijms24087301] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/09/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Posidonia oceanica (L.) Delile is the main seagrass plant in the Mediterranean basin that forms huge underwater meadows. Its leaves, when decomposed, are transported to the coasts, where they create huge banquettes that protect the beaches from sea erosion. Its roots and rhizome fragments, instead, aggregate into fibrous sea balls, called egagropili, that are shaped and accumulated by the waves along the shoreline. Their presence on the beach is generally disliked by tourists, and, thus, local communities commonly treat them as waste to remove and discard. Posidonia oceanica egagropili might represent a vegetable lignocellulose biomass to be valorized as a renewable substrate to produce added value molecules in biotechnological processes, as bio-absorbents in environmental decontamination, to prepare new bioplastics and biocomposites, or as insulating and reinforcement materials for construction and building. In this review, the structural characteristics, and the biological role of Posidonia oceanica egagropili are described, as well as their applications in different fields as reported in scientific papers published in recent years.
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Affiliation(s)
- Odile Francesca Restaino
- Department of Chemical Sciences, University of Naples "Federico II", Montesantangelo Campus, Via Cinthia 4, 80126 Naples, Italy
| | - Concetta Valeria L Giosafatto
- Department of Chemical Sciences, University of Naples "Federico II", Montesantangelo Campus, Via Cinthia 4, 80126 Naples, Italy
| | - Seyedeh Fatemeh Mirpoor
- Department of Chemical Sciences, University of Naples "Federico II", Montesantangelo Campus, Via Cinthia 4, 80126 Naples, Italy
| | - Marcella Cammarota
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via De Crecchio 7, 80138 Naples, Italy
| | - Sondos Hejazi
- Department of Chemical Sciences, University of Naples "Federico II", Montesantangelo Campus, Via Cinthia 4, 80126 Naples, Italy
| | - Loredana Mariniello
- Department of Chemical Sciences, University of Naples "Federico II", Montesantangelo Campus, Via Cinthia 4, 80126 Naples, Italy
| | - Chiara Schiraldi
- Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Via De Crecchio 7, 80138 Naples, Italy
| | - Raffaele Porta
- Department of Chemical Sciences, University of Naples "Federico II", Montesantangelo Campus, Via Cinthia 4, 80126 Naples, Italy
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Mirpoor SF, Varriale S, Porta R, Naviglio D, Spennato M, Gardossi L, Giosafatto CVL, Pezzella C. A biorefinery approach for the conversion of Cynara cardunculus biomass to active films. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107099] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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"Neptune Balls" Polysaccharides: Disentangling the Wiry Seagrass Detritus. Polymers (Basel) 2021; 13:polym13244285. [PMID: 34960836 PMCID: PMC8703491 DOI: 10.3390/polym13244285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 11/27/2021] [Accepted: 12/03/2021] [Indexed: 01/21/2023] Open
Abstract
Each year, high amounts of dead seagrass material are washed ashore at beaches world-wide. In the Mediterranean region, the seagrass Posidonia oceanica is responsible for huge agglomerates of ball-like seagrass litter. As these are often removed due to touristic reasons, a reuse method would be a step towards a more ecologically oriented society. In this study, the main polysaccharide components were analyzed, in order to propose possible usage options. To do this, different aqueous fractions were extracted, analyzed by classical carbohydrate analysis methods (GC-FID/MS, colorimetric assay and elemental analysis), and purified by ion-exchange chromatography, as well as selective precipitation with a detecting agent for highly glycosylated glycoproteins. The obtained purified fractions were analyzed in detail and a linkage-type analysis of the most promising extract was conducted via permethylation. Only low amounts of glycoproteins, as well as medium amounts of the characteristic apiogalacturonan were likely to be present, while xylan seemed to be the most abundant polysaccharide in most fractions. A partial structural proposal showed general accordance with land plant xylans, presenting reuse options in the field of biofuel and bioplastic generation.
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Rojas-Lema S, Nilsson K, Trifol J, Langton M, Gomez-Caturla J, Balart R, Garcia-Garcia D, Moriana R. “Faba bean protein films reinforced with cellulose nanocrystals as edible food packaging material”. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.107019] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lignin/Carbohydrate Complex Isolated from Posidonia oceanica Sea Balls (Egagropili): Characterization and Antioxidant Reinforcement of Protein-Based Films. Int J Mol Sci 2021; 22:ijms22179147. [PMID: 34502058 PMCID: PMC8431013 DOI: 10.3390/ijms22179147] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/20/2021] [Accepted: 08/20/2021] [Indexed: 01/29/2023] Open
Abstract
A lignin fraction (LF) was extracted from the sea balls of Posidonia oceanica (egagropili) and extensively dialyzed and characterized by FT-IR and NMR analyses. LF resulted water soluble and exhibited a brownish-to-black color with the highest absorbance in the range of 250-400 nm, attributed to the chromophore functional groups present in the phenylpropane-based polymer. LF high-performance size exclusion chromatography analysis showed a highly represented (98.77%) species of 34.75 kDa molecular weight with a polydispersity index of 1.10 and an intrinsic viscosity of 0.15. Quantitative analysis of carbohydrates indicated that they represented 28.3% of the dry weight of the untreated egagropili fibers and 72.5% of that of LF. In particular, eight different monosaccharides were detected (fucose, arabinose, rhamnose, galactose, glucose, xylose, glucosamine and glucuronic acid), glucuronic acid (46.6%) and rhamnose (29.6%) being the most present monosaccharides in the LF. Almost all the phenol content of LF (113.85 ± 5.87 mg gallic acid eq/g of extract) was water soluble, whereas around 22% of it consisted of flavonoids and only 10% of the flavonoids consisted of anthocyanins. Therefore, LF isolated from egagropili lignocellulosic material could be defined as a water-soluble lignin/carbohydrate complex (LCC) formed by a phenol polymeric chain covalently bound to hemicellulose fragments. LCC exhibited a remarkable antioxidant activity that remained quite stable during 6 months and could be easily incorporated into a protein-based film and released from the latter overtime. These findings suggest egagropili LCC as a suitable candidate as an antioxidant additive for the reinforcement of packaging of foods with high susceptibility to be deteriorated in aerobic conditions.
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Mirpoor SF, Giosafatto CVL, Porta R. Biorefining of seed oil cakes as industrial co-streams for production of innovative bioplastics. A review. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.01.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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