Chemical composition and pulp characterization of Tunisian vine stems

Mansouri, Samar; Khiari, Ramzi; Bendouissa, Najoua; Saadallah, Seif; Mhenni, Farouk; Mauret, Évelyne

doi:10.1016/j.indcrop.2011.07.036

Cited by 66 publications

(40 citation statements)

References 19 publications

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“…The lignin content of the stems is relatively low. The comparison with vine stems (Mansouri et al, 2012) confirms that the quantities of extractives fractions in the Phragmites australis are elevated. Concerning structural components, the Phragmites australis stems and roots are characterized by low lignin content and great quantity of hemicellulose, while the content in cellulose is relatively comparable.…”

Section: Chemical Composition Of Phragmites Australismentioning

confidence: 53%

Valuation of Biomaterial: <i>Phragmites australis</i> in the Retention of Metal-Complexed Dyes

Kesraoui

Mabrouk

Seffen

2017

American Journal of Environmental Sciences

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Abstract:The purpose of this research was to estimate the potential of cellulosic fibers of highly available and renewable Tunisian biomass Phragmites australis for the biosorption of an anionic metal complexed dye: Alpacide blue. The present study shows that the Phragmite australis were used successfully for the adsorption of Alpcide blue from aqueous solution. Equilibrium was reached after 5 h at 20°C and at pH 2. Optimal adsorption parameters for adsorption of dye onto fibers extract of upper rods were accomplished after 5 h of biosorption using an initial dye concentration of 50 mg L −1 , biosorbent amount of 0.5 g of Phragmites australis, pH 2 and a granulometry size between 250 and 500 µm. In these conditions, the adsorbed amount of Alpacide blue is 6.11 mg g −1 and the biosorption percentage is 85.9%. When the temperature increases until 60°C, the retention rate increases also to reach a value of 90.5%. Regarding fibers extracted from roots, we notice improvement of the adsorbed amount which reaches 7.0 mg g −1 and the overall retention rate of 92.6% at 20°C. While at 60°C the amount adsorbed is 7.4 mg g −1 and the fixation rate reached 94%. The biosorption phenomenon seems to be endothermic. Moreover the adsorption process is fast, following the model of pseudo-second order for both parts of the plant stems and roots. Finally, mathematical modeling of adsorption isotherms showed that the Freundlich model perfectly describes the biosorption of organic dye studied by these fibers of Phragmites australis for both stems and roots.

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Section: Chemical Composition Of Phragmites Australismentioning

confidence: 53%

Valuation of Biomaterial: <i>Phragmites australis</i> in the Retention of Metal-Complexed Dyes

Kesraoui

Mabrouk

Seffen

2017

American Journal of Environmental Sciences

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“…The wood samples decayed by F. fomentarius were characterized by a relatively low lignin content of 23.32%, 1% NaOH extractives of 36.3%, and ethanol-benzene extractives of 6.8%, whereas the holocellulose content remained high at 50.89%. Lignin and the aforementioned extractives have a negative influence on chemical recovery during the alkaline pulping process, which is supposed to be a positive feature when considering the pulp yield and chemical consumption for their removal (Mansouri et al 2012). As the results indicate, F. fomentarius was considered the most suitable fungus for the biological pretreatment process in pulping production.…”

Section: Changes In the Main Chemical Composition Of The Decayed Woodmentioning

confidence: 91%

Degradation Mechanism and Chemical Component Changes in Betula platyphylla Wood by Wood-Rot Fungi

Shang¹,

Shaopeng²,

Wang³

2013

BioResources

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“…This requires the cleaning of the vineyards every autumn after grape harvesting [32]. This biomass is characterized by relatively high amounts of extracts, lignin, and interesting amounts of holocellulose compared to annual, non wood and wood plants [32]. In the present study, the valorization of this biomass to produce CMCNa, which have not been reported before, was conducted as well as the investigation of the water absorbent behavior of the prepared materials.…”

Section: Introductionmentioning

confidence: 95%

“…The delignification procedure was carried out as mentioned by Mansouri et al [32]. Briefly, the preparation of extractedbleached cellulose is conducted in two steps.…”

Section: Extraction and Bleaching Of Cellulose From Vine Stemmentioning

confidence: 99%

“…Owing to grape production, significant quantities of vine fragments accumulate on Tunisian agricultural lands. This requires the cleaning of the vineyards every autumn after grape harvesting [32]. This biomass is characterized by relatively high amounts of extracts, lignin, and interesting amounts of holocellulose compared to annual, non wood and wood plants [32].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Carboxymethyl Cellulose from Tunisian Vine Stem: Study of Water Absorption and Retention Capacities

et al. 2014

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The aim of this work was to study the effect of the degree of substitution (DS) and the purity of sodium carboxymethyl cellulose (CMCNa) prepared from Tunisian vine stem on the absorption and retention of water. Vine stem was first delignified using souda-anthraquione, then bleached and finally chemically modified, in order to synthesize different CMCNa derivatives. The carboxymethylation reaction was carried out in presence of NaOH (40 %) and monochloroacetic acid (ClCH 2 COOH), in n-butanol as a reaction solvent. The obtained CMCNa derivatives were characterized using different tools such as the DS, Fourier transforms IR techniques, CP-MAS 13 C-NMR, the exchange capacity as well as the determination of modification reaction yield. The performance of the prepared derivatives in term of absorption capacities and retention capacities was established. The performance of CMCNa derivatives was compared with that achieved by commercial counterparts and it was concluded that the prepared ones exerted higher efficiency.

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Chemical composition and pulp characterization of Tunisian vine stems

Cited by 66 publications

References 19 publications

Valuation of Biomaterial: <i>Phragmites australis</i> in the Retention of Metal-Complexed Dyes

Valuation of Biomaterial: <i>Phragmites australis</i> in the Retention of Metal-Complexed Dyes

Degradation Mechanism and Chemical Component Changes in Betula platyphylla Wood by Wood-Rot Fungi

Synthesis and Characterization of Carboxymethyl Cellulose from Tunisian Vine Stem: Study of Water Absorption and Retention Capacities

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