Biopolymer composite from cellulose nanocrystals of almond (Prunus dulcis) shell as effective adsorbents for Cu2+ ions from aqueous solutions

Maaloul, Najeh; Oulego, Paula; Rendueles, Manuel; Ghorbal, Achraf; Dı́az, Mario

doi:10.1016/j.jece.2021.105139

Cited by 36 publications

(15 citation statements)

References 98 publications

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“…The regeneration and reusability of LR-NaOH for heavy metals Cu 2þ were evaluated by five consecutive adsorption-desorption cycles (Figure 9). It showed that LR-NaOH has good reusability for Cu 2þ , the adsorbability remained higher than 74% after five consecutive adsorption-desorption cycles, consistent with other reports (Shi et al 2020;Tan et al 2020;Nm et al 2021), which indicated that the LR-NaOH is a suitable potential adsorbent for the removal of the heavy metal ions Cu 2þ from water.…”

Section: Adsorption Isothermsupporting

confidence: 89%

Preparation of bio-absorbents by modifying licorice residue via chemical methods and removal of copper ions from wastewater

Yin

Zhang²,

et al. 2021

Water Science and Technology

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In this paper, a series of bio-adsorbents (LR-NaOH, LR-Na2CO3 and LR-CA) were successfully prepared by modifying Licorice Residue with NaOH, Na2CO3 and citric acid, which were used as the adsorbents to remove Cu2+ from wastewater. The morphology and structure of bio-adsorbents were characterized by Fourier Transform Infrared, SEM, TG and XRD. Using static adsorption experiments, the effects of the adsorbent dosage, the solution pH, the adsorption time, and the initial Cu2+ concentration on the adsorption performance of the adsorbents were investigated. The results showed that the adsorption process of Cu2+ by the bio-adsorbents can be described by pseudo-second order kinetic model and the Langmuir model. The surface structure of the LR-NaOH, LR-Na2CO3 and LR-CA changed obviously, and the surface-active groups increased. The adsorption capacity of raw LR was 21.56 mg/g, LR-NaOH, LR- Na2CO3 significantly enhanced this value up to 43.65 mg/g, 43.55 mg/g, respectively. After four adsorption-desorption processes, the adsorption capacity of LR-NaOH also maintained about 73%. Therefore, LR-NaOH would be a promising adsorbent for removing Cu2+ from wastewater, and the simple strategy towards preparation of adsorbent from the waste residue can be as a potential approach using in the water treatment.

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Section: Adsorption Isothermsupporting

confidence: 89%

Preparation of bio-absorbents by modifying licorice residue via chemical methods and removal of copper ions from wastewater

Yin

Zhang²,

et al. 2021

Water Science and Technology

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“…The sharp peak present at 1032 cm À1 of the untreated AS particle and 1026 cm À1 of the alkaline treated AS particle indicates that the alkaline treatment does not affect the polysaccharide cellulose in the AS particles. 30 Quiles-Carrillo et al 31 made a similar observation on the cellulose and hemicellulose peaks in untreated almond shell filler.…”

Section: Ft-ir Analysis Of Surface Treated As Particlementioning

confidence: 67%

A spatial distribution effect of almond shell bio filler on physical, mechanical, thermal deflection and water absorption properties of vinyl ester polymer composite

Palaniyappan¹,

Veiravan

Rajkumar

et al. 2022

Polymer Composites

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The present work deals with the effective utilization of almond shell bio-waste fillers in the production of vinyl ester polymer composites. The almond shell particle surface was chemically modified by alkaline treatment. The almond shell particles with varying weight percentages of 5%-30% were used to prepare the vinyl ester polymer composite. The experimental results show that a 25% addition of alkaline-treated almond shell particles significantly improved the mechanical properties of the composite when compared to pure vinyl ester and untreated almond-filled composite samples. The highest tensile, flexural, impact strength, and Shore D hardness of the 25% alkaline-treated almond shell composite were 54, 142 MPa, 31, and 79 kJ/m 2 , respectively. This was due to the alkaline treatment of almond shell particles, which improved the interfacial adhesion between the vinyl ester matrix and almond particles. The heat deflection temperature of the 25% alkaline treated almond shell particlefilled vinyl ester matrix composite was 72 C. The thermal insulating characteristics of alkali-treated almond shells were improved due to the reduction of quickly thermal degradable materials such as hemicelluloses and lignin, as indicated by Fourier transform infrared spectroscopic data, and more exposure of minerals to the surface, as confirmed by energy dispersive X-ray analysis. The addition of alkaline-treated almond shell particles improves the characteristics of the vinyl ester matrix and allows the development of biocomposites. K E Y W O R D S alkaline treatment, almond shell, bio-composite, mechanical properties, thermal deflection, vinyl ester

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“…Therefore, the name "NC" was assigned to them. [41] Additionally, the aspect ratio of NC obtained through DES LG pretreatment was signi cantly higher than that obtained through sulfuric acid hydrolysis for 30 min (61 ± 24) (Figure S1a). This can be attributed to the mild reaction conditions in DES LG pretreatment and the inhibitory effect of non-cellulosic components in CS on cellulose hydrolysis during the DES LG processing.…”

Section: Eco-friendly Preparation Of Nc and Hbl From Csmentioning

confidence: 92%

“…In contrast, sulfuric acid is too strong and can hydrolyze both the amorphous and crystalline regions of cellulose. [41] Furthermore, the NC obtained through DES LG processing showed excellent dispersion in distilled water with a polydispersity index of 0.7, and the NC suspension remained stable without aggregation for up to 3 months. This is likely due to the presence of lactate moieties on NC, which introduce negative charges that repel each other, as indicated by the zeta potential of -24 mV for the NC suspension.…”

Section: Eco-friendly Preparation Of Nc and Hbl From Csmentioning

confidence: 93%

Eco-friendly and practical plastic food-packaging alternatives of all-biomass-derived nanocomposite films

Chi

Ding

Zhang

et al. 2023

Preprint

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Approximately 60% of plastic pollution originates from the food and beverage packaging. Complete degradation of the bio-based plastic packaging presently available, relies on garbage sorting, recycling, and composting. Herein, we showcase that naturally-degradable bioplastics as food packaging alternatives can be accomplished with all-biomass nanocomposite encompassing pullulan, nanocellulose (NC) and/or hydrophobic lignin (HBL) using simple approaches. NC and HBL were derived from corn stalk using a recyclable eco-friendly deep eutectic solvent (DES). Optimal dispersion of NC in pullulan through high-pressure homogenization produced a pullulan-NC (PNC) bio-nanocomposite film with mechanical strength enhanced to 76.6 ± 1.9 MPa. Single PNC film could serve as food inner-packaging; while it collaborated with kraft paper wrapping to compensate its inadequate water resistance, performing as packaging for dry powders, biscuits, and oil. Remarkably, a sandwich-like film, created by hot-pressing two outer layers of HBL-NC (LNC) films and one PNC film layer, exhibited desirable mechanical strength and water resistance. Varying the number of LNC and PNC layers achieved diverse composite films as food outer-packaging, including preserving and shopping bags, disposable cups and straws. Significantly, all these films are biosafe and readily degraded in nature without counting on composting or recycling, underlining their prospects in future industrialization and sustainability.

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Biopolymer composite from cellulose nanocrystals of almond (Prunus dulcis) shell as effective adsorbents for Cu2+ ions from aqueous solutions

Cited by 36 publications

References 98 publications

Preparation of bio-absorbents by modifying licorice residue via chemical methods and removal of copper ions from wastewater

Preparation of bio-absorbents by modifying licorice residue via chemical methods and removal of copper ions from wastewater

A spatial distribution effect of almond shell bio filler on physical, mechanical, thermal deflection and water absorption properties of vinyl ester polymer composite

Eco-friendly and practical plastic food-packaging alternatives of all-biomass-derived nanocomposite films

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