Effect of the autohydrolysis treatment on the integral revalorisation of Ziziphus lotus

Saad, Sara; Dávila, Izaskun; Mannai, Faten; Labidi, Jalel; Moussaoui, Younes

doi:10.1007/s13399-022-02457-6

Cited by 7 publications

(8 citation statements)

References 45 publications

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“…The cake is a by-product of oil extraction from prickly pear seeds. The chemical composition of prickly pear cake was determined according to TAPPI standardized methods as previously described [43][44][45][46][47], namely, ash content T211 om-07,lignin T222 om-06, holocellulose Wise et al method [48], and α-cellulose T 203 cm-99. Elemental analysis of prickly pear cake was performed with the Thermo Scientific Flash 2000 CHNS-O Analyzer.…”

Section: Prickly Pear Seed Cake Characterizationmentioning

confidence: 99%

Optimization of the Preparation of Activated Carbon from Prickly Pear Seed Cake for the Removal of Lead and Cadmium Ions from Aqueous Solution

et al. 2022

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In this study, we evaluated the use of prickly pear seed cake, a by-product of prickly pear seed oil extraction, as a new precursor for producing activated carbon by phosphoric acid activation, and the obtained carbon’s capacity for heavy metal removal from aqueous solution. Response surface methodology based on the full factorial design at two levels (24) was developed to reduce the number of experiments and reach optimal preparation conditions for the removal of cadmium and lead ions from aqueous solutions. Design Expert 11.1.2.0 Trial software was used for generating the statistical experimental design and analyzing the observed data. Factors influencing the activation process, such as carbonization temperature, activation temperature, activation time, and impregnation ratio, were studied. Responses were studied in depth with an analysis of variance to estimate their significance. Each response was outlined by a first-order regression equation demonstrating satisfactory correspondence between the predicted and experimental results as the adjusted coefficients of correlation. Based on the statistical data, the best conditions for the removal of heavy metals from aqueous solution by the obtained activated carbon were indicated. The maximum iodine number and methylene blue index were 2527.3 mg g−1 and 396.5 mg g−1, respectively, using activated carbon obtained at the following conditions: Tc = 500 °C, Ta = 500 °C, impregnation ratio = 2:1 (g H3PO4: g carbon), and activation time of two hours. The maximum adsorption reached 170.2 mg g−1 and 158.4 mg g−1 for Cd2+ and Pb2+, respectively, using activated carbon obtained at the following conditions: Tc = 600 °C, Ta = 400 °C, impregnation ratio = 2:1 (g H3PO4: g carbon), and activation time of one hour. The activated carbon obtained was characterized by Boehm titration, pH of point of zero charge (pHPZC), Brunauer–Emmett–Teller surface area (SBET), and scanning electron microscopy. Adsorption was performed according to different parameters: pH solution, adsorbent dosage, temperature, contact time, and initial concentration. Regeneration experiments proved that the obtained activated carbon still had a high removal capacity for Cd2+ and Pb2+ after five regeneration cycles.

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Section: Prickly Pear Seed Cake Characterizationmentioning

confidence: 99%

Optimization of the Preparation of Activated Carbon from Prickly Pear Seed Cake for the Removal of Lead and Cadmium Ions from Aqueous Solution

et al. 2022

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“…The trunk of Ziziphus lotus was collected in Gafsa (Southwest of Tunisia). This biomass was composed by 30.8 ± 0.5 wt.% of glucan, 20.7 wt.% of hemicellulose, 19.6 ± 0.5 wt.% of Klason lignin and 1.49 wt.% of ash, as it was previously analyzed [23]. Prior to the extraction of the cellulose, the obtained feedstock was air-dried, milled and sieved to obtain particle size smaller than 5 mm.…”

Section: Raw Materialsmentioning

confidence: 99%

“…Except for the fruit and leaves, the employment of the remaining part of this bush is scarce. Nevertheless, in the latest years, the Ziziphus lotus was subjected to a biorefinery process for the obtaining of oligosaccharides, lignin and cellulose nanofibers [23]. In this work, one of the main fractions of this feedstock, the cellulose, was employed for the production of adsorption membranes that could remove harmful dyes and heavy metal ions from wastewaters [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, the present work evaluates the influence of two commonly employed cellulose extraction procedures (an alkaline process and a delignification-bleaching treatment based on a TAPPI (Technical Association of the Pulp and Paper Industry) standard method (T 203 cm-99)) [23,30] on the characteristics of the obtained CMC. The CMC with the most adequate properties will be cross-linked with citric acid to produce an eco-friendly adsorption membrane.…”

Section: Introductionmentioning

confidence: 99%

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Cross-Linked Carboxymethylcellulose Adsorbtion Membranes from Ziziphus lotus for the Removal of Organic Dye Pollutants

et al. 2022

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The goal of this study is to assess Ziziphus lotus’s potential for producing carboxymethylcellulose adsorption membranes with the ability to adsorb methyl green from wastewaters by the revalorization of its cellulosic fraction. The cellulose from this feedstock was extracted by an alkaline process and TAPPI standard technique T 203 cm-99 and afterwards they were carboxymethylated. The obtained carboxymethylcelluloses were deeply characterized, being observed that the carboxymethylcellulose produced from the alkaline cellulose presented the higher solubility due to its lower crystallinity degree (53.31 vs. 59.4%) and its higher substitution degree (0.85 vs. 0.74). This carboxymethylcellulose was cross-linked with citric acid in an aqueous treatment in order to form an adsorption membrane. The citric acid provided rigidity to the membrane and although it was hydrophilic it was not soluble in water. By evaluating the potential of the produced membrane for the removal of pollutant dyes from wastewater, it was observed that the adsorption membrane prepared from the carboxymethylcellulose’s produced from the Ziziphus lotus was able to remove 99% of the dye, methyl green, present in the wastewater. Thus, this work demonstrates the potential of the Ziziphus lotus for the production of a novel and cost-effective carboxymethylcellulose adsorption membrane with high capacity to treat wastewaters.

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“…The manufacture of lignocellulosic material as a substitute for wood sources is among the most intriguing ways tovalue cellulose fibers [ 3 , 6 , 7 , 8 ]. Cellulose is one of the most important natural polymers on Earth, and it can play an important part in worldwide ecology, since it is produced in quantities that surpass 10 12 tons per year [ 4 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Nanofibers from Schinus molle: Preparation and Characterization

et al. 2022

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Schinus molle (SM) was investigated as a primary source of cellulose with the aim of discovering resources to generate cellulose nanofibers (CNF). The SM was put through a soda pulping process to purify the cellulose, and then, the fiber was treated with an enzymatic treatment. Then, a twin-screw extruder and/or masuko were utilized to help with fiber delamination during the nanofibrillation process. After the enzymatic treatment, the twin-screw extruder and masuko treatment give a yield of 49.6 and 50.2%, respectively. The optical and atomic force microscopy, morfi, and polymerization degrees of prepared cellulosic materials were established. The pulp fibers, collected following each treatment stage, demonstrated that fiber characteristics such as length and crystallinity varied according to the used treatment (mechanical or enzymatic treatment). Obviously, the enzymic treatment resulted in shorter fibers and an increased degree of polymerization. However, the CNF obtained after enzymatic and extrusion treatment was achieved, and it gave 19 nm as the arithmetic width and a Young’s modulus of 8.63 GPa.

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Effect of the autohydrolysis treatment on the integral revalorisation of Ziziphus lotus

Cited by 7 publications

References 45 publications

Optimization of the Preparation of Activated Carbon from Prickly Pear Seed Cake for the Removal of Lead and Cadmium Ions from Aqueous Solution

Optimization of the Preparation of Activated Carbon from Prickly Pear Seed Cake for the Removal of Lead and Cadmium Ions from Aqueous Solution

Cross-Linked Carboxymethylcellulose Adsorbtion Membranes from Ziziphus lotus for the Removal of Organic Dye Pollutants

Cellulose Nanofibers from Schinus molle: Preparation and Characterization

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