Characterization and biological activities of synthesized citrus pectin-MgO nanocomposite

Supreetha, R.; Bindya, S.; Deepika, P.; Vinusha, H.M.; Hema, B. P.

doi:10.1016/j.rechem.2021.100156

Cited by 16 publications

(10 citation statements)

References 25 publications

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“…In the XRD spectrum of PMP film, along with characteristic peaks of pectin and PVP, additional peaks at 2θ values of 36.9°, 38.1°, 43.2°, 62.4° and 74.6° were found, which corresponds to the presence of MgO nanoparticles. The results are in par with the studies reported previously [ 23 ]. It is also noted that the percentage crystallinity of PP and PMP films was 60.21% and 86.40% as specified by the XRD results.…”

Section: Resultssupporting

confidence: 89%

“…Biodegradation studies of pectin films incorporated with Salicornia ramosissima showed great potential as a sustainable food packaging material of the future [ 22 ]. From the literature survey, it is prominent that the incorporation of MgO nanoparticles into pectin matrix enhances the antimicrobial properties [ 23 ]. Bionanocomposite film with magnesium oxide nanoparticles also displayed increased antioxidant activity, low solubility, and decreased water vapor permeability [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pectin/PVA and pectin-MgO/PVA films: Preparation, characterization and biodegradation studies

Suhasini¹,

Rajeshwari²,

Bindya³

et al. 2023

Heliyon

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Pectin/PVA and pectin-MgO/PVA films: Preparation, characterization and biodegradation studies

Suhasini¹,

Rajeshwari²,

Bindya³

et al. 2023

Heliyon

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“…Although the raw materials above are potential materials for dye removal in wastewater, it might be better if they could increase their material efficiencies for high dye removal in the case of high-strength wastewater. As a result, many studies have developed material efficiency by adding several metal oxides like titanium dioxide (TiO 2 ), aluminum oxide (Al 2 O 3 ), copper oxide (CuO), manganese oxide (MnO), iron(II,III) oxide (Fe 3 O 4 or Fe 2 O 3 ), and zinc oxide (ZnO). − Among these, Fe 3 O 4 or Fe 2 O 3 and ZnO are popularly used for improving material efficiencies to remove the dye in many articles. − Therefore, this study attempts to synthesize dye-adsorbent materials from lemon peels modified with iron(III) oxide-hydroxide and zinc oxide in a bead form to increase material efficiency and make it feasible to be an alternative dye adsorbent for an industrial application.…”

Section: Introductionmentioning

confidence: 99%

Comparative Reactive Blue 4 Dye Removal by Lemon Peel Bead Doping with Iron(III) Oxide-Hydroxide and Zinc Oxide

2022

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The increasing concern of dye contamination in wastewater results in the toxicity of aquatic life and water quality, so wastewater treatment is required to treat the low water quality standard for safety purposes. Lemon peel beads-doped iron(III) oxide-hydroxide (LBF) and lemon peel beads-doped zinc oxide (LBZ) were synthesized and characterized to investigate their crystalline structure, surface morphology, chemical compositions, chemical functional groups, and ζ potentials by X-ray diffraction, field emission scanning electron microscopy and focused ion beam, energy dispersive X-ray spectroscopy, Fourier transform infrared, and zetasizer techniques. Their effects of dose, contact time, temperature, pH, and concentration for reactive blue 4 (RB4) dye removal efficiencies were investigated by batch experiments, and their adsorption isotherms, kinetics, and desorption experiments were also studied. LBF and LBZ demonstrated semicrystalline structures, and their surface morphologies had a spherical shape with coarse surfaces. Five main elements of carbon (C), oxygen (O), calcium (Ca), chlorine (Cl), and sodium (Na) and six main function groups of O–H, CN, CC, C–OH, C–O–C, and C–H were detected in both materials. The results of ζ potential demonstrated that both LBF and LBZ had negative charges on the surface at all pH values, and their surfaces increased more of the negative charge with the addition of the pH value from 2–12. For batch tests, the RB4 dye removal efficiencies of LBF and LBZ were 83.55 and 66.64%, respectively, so LBF demonstrated a higher RB4 dye removal efficiency than LBZ. As a result, the addition of iron(III) oxide-hydroxide helped in improving the material efficiency more than zinc oxide. In addition, both LBF and LBZ could be reused in more than five cycles for RB4 dye removal of more than 41%. The Freundlich model was a good explanation for their adsorption patterns relating to physiochemical adsorption, and a pseudo-second-order kinetic model was a well-fitted model for explaining their adsorption mechanism correlating to the chemisorption process with heterogeneous adsorption. Therefore, LBF was a potential adsorbent to further apply for RB4 dye removal in industrial applications.

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“…This suggests a highly branched polysaccharide with only some regular association of the linear chains (Mark et al ., 2017). The low relative CrI may indicate that the extraction solvents were not able to dissolve and remove crystalline forms of pectin from the substrate, especially considering that another study showed a higher CrI value (~68%) for extracted pectin (Hassan et al ., 2021; Supreetha et al ., 2021). From this study's data, differences in crystallinity were small, with the acid extract showing the highest crystallinity and thus a slightly more ordered structure.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound‐assisted enzymatic extraction of orange peel pectin and its characterisation

Bosch,

Malgas

2023

Int J of Food Sci Tech

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SummaryCitrus processing waste (CPW) accumulates in vast amounts worldwide during fruit processing and its disposal through landfilling is environmentally damaging. However, CPW is also a renewable source of economically and medically relevant compounds such as pectin. There is a need for new methods of extracting pectin from CPW, as conventional methods are unsustainable. Therefore, this study proposed a new environmentally friendly method, which combines ultrasound cavitation with cellulase preparation, Celluclast) into one extraction procedure (UAE), and compared it to conventional acid extraction. The yield and productivity of each method were measured and the extracts were analysed for composition and structural characteristics. UAE and acid extraction pectin yields (26.9 vs 22.1 %) and productivity (0.10 vs 0.09 %/min) values were comparable. The extracts consisted mainly of galacturonic acid and galactose residues, but the ratio was different for each method; 1: 0.34 and 0.84: 1 for acid and UAE extracted pectin, respectively. FTIR was used to estimate the degree of esterification of the pectin extracts; 8% and 55% for acid and UAE extracted pectin, respectively. TGA revealed a higher ash content in UAE pectin, while XRD revealed similar degrees of polymer crystallinity. Viscosimetry revealed that the acid pectin had a higher molecular weight (70.22 kDa) compared to UAE pectin (197.78 kDa). In conclusion, the UAE procedure is a viable alternative to acid extraction.

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Characterization and biological activities of synthesized citrus pectin-MgO nanocomposite

Cited by 16 publications

References 25 publications

Pectin/PVA and pectin-MgO/PVA films: Preparation, characterization and biodegradation studies

Pectin/PVA and pectin-MgO/PVA films: Preparation, characterization and biodegradation studies

Comparative Reactive Blue 4 Dye Removal by Lemon Peel Bead Doping with Iron(III) Oxide-Hydroxide and Zinc Oxide

Ultrasound‐assisted enzymatic extraction of orange peel pectin and its characterisation

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