Application of eggshell wastes as valuable and utilizable products: A review

Faridi, Hamideh; Arabhosseini, Akbar

doi:10.17221/6/2017-rae

Cited by 152 publications

(42 citation statements)

References 83 publications

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“…The initial pH adjustments were made by HNO 3 (0.1 M) or NaOH (0.1 M) solutions. The influence of three parameters on the adsorption capacity have been studied-adsorbent dosage (0.1 g/L-0.5 g/L), initial pH (2)(3)(4)(5)(6), and initial metal concentration (10 mg/L-100 mg/L). First, the dosage effect was investigated with Cd 2+ and Pb 2+ concentration of 100 mg/L and solution pH (~5.8).…”

Section: Sorption Experimentsmentioning

confidence: 99%

“…The sorption isotherm was modeled with the Langmuir and the Freundlich models, as given in Equations (5) and (6), respectively.…”

Section: Sorption Isothermmentioning

confidence: 99%

“…These waste eggshells have been dumped into landfills without further treatment, causing several environmental consequences [2]. The waste is mainly made up of calcium carbonate (CaCO 3 ) with minor impurities, which has been used in further applications as a source of calcium supplements [3][4][5]. However, the effect of impurities has been minimized with further treatments such as chemical treatment and physical treatment [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Sorption of Cd2+ and Pb2+ on Aragonite Synthesized from Eggshell

Habte

Shiferaw²,

Khan

et al. 2020

Sustainability

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In the present work, waste eggshells were used as a precursor for the synthesis of aragonite crystals through the wet carbonation method. Cadmium (Cd2+) and lead (Pb2+) were removed by the synthesized aragonite from synthetic wastewater. The influence of initial solution pH, contact time, Cd2+ and Pb2+ concentration, and sorbent dosage were evaluated. The major sorption was observed in the first 100 mins and 360 mins for Pb2+and Cd2+ respectively reaching sorption equilibrium at 720 mins (12 hr). The sorption capacity toward Pb2+ was much higher than toward Cd2+. Both heavy metals displayed high sorption capacities at initial pH 6. The pseudo-second-order kinetic model fits well with the experimental data with a higher correlation coefficient R2. Two isotherm models were also evaluated for the best fit with the experimental data obtained. Langmuir isotherm best fits the sorption of the metals on aragonite synthesized from eggshells. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) results of sorbent after sorption showed that the mechanism of sorption was dominated by surface precipitation. Therefore, aragonite crystals synthesized from waste eggshells can be a potential substitute source for the removal of Cd2+ and Pb2+ from contaminated water.

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Section: Sorption Experimentsmentioning

confidence: 99%

“…The sorption isotherm was modeled with the Langmuir and the Freundlich models, as given in Equations (5) and (6), respectively.…”

Section: Sorption Isothermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sorption of Cd2+ and Pb2+ on Aragonite Synthesized from Eggshell

Habte

Shiferaw²,

Khan

et al. 2020

Sustainability

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“…Eggshell is a solid waste which contributes to degradation in the environment. Households, restaurants, and bakeries are the major source of eggshell [3]. The main component is pure calcium carbonate with little porosity [3].…”

Section: Introductionmentioning

confidence: 99%

“…Households, restaurants, and bakeries are the major source of eggshell [3]. The main component is pure calcium carbonate with little porosity [3]. This waste can be transformed into valuable products.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nano-Calcium Oxide from Waste Eggshell by Sol-Gel Method

Shiferaw²,

et al. 2019

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The sol-gel technique has many advantages over the other mechanism for synthesizing metal oxide nanoparticles such as being simple, cheap and having low temperature and pressure. Utilization of waste materials as a precursor for synthesis makes the whole process cheaper, green and sustainable. Calcium Oxide nanoparticles have been synthesized from eggshell through the sol-gel method. Raw eggshell was dissolved by HCl to form CaCl 2 solution, adding NaOH to the solution dropwise to agitate Ca (OH) 2 gel and finally drying the gel at 900 • C for 1 h. The synthesized nanoparticle was characterized by scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), X-Ray fluorescence (XRF) and X-ray diffraction (XRD). The FTIR and XRD results have clearly depicted the synthesis of calcium oxide from eggshell, which is mainly composed of calcium carbonate. The FE-SEM images of calcium oxide nanoparticles showed that the particles were almost spherical in morphology. The particle size of the nanoparticles was in the range 50 nm-198 nm. Therefore, waste eggshell can be considered as a promising resource of calcium for application of versatile fields.

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Eggshell membrane reinforced polypropylene biocomposite and its tactile assessment

Sinha

Lee

et al. 2020

J of Applied Polymer Sci

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Considering the better tactile performance (pleasantness) of different materials for example, leather, fur, feather, and so on, which are known to be the tribopositive materials, herein, the tribo‐positive eggshell membrane (ESM) powders derived from waste eggshell were melt‐mixed with polypropylene (PP) to prepare a low‐cost ESM/PP biocomposite of enhanced tactile property. In this regard, in‐plane coefficient of friction (COF) has been examined and found a decreasing trend with increasing the ESM content which may consider towards improving the pleasantness of the composite, and which is due to the increase of surface smoothness and adhesion property laid by incorporation of polar ESM within the nonpolar PP matrix. However, the decrease of COF was not spontaneous. Alternatively, the increase of tribopositive character of the composite due to addition of tribopositive ESM within the tribonegative PP, as investigated by fabricating a single electrode triboelectric nanogenerator (STENG)‐like device made of the ESM/PP composite may be considered potential to realize the enhancement of touch‐feeling performance. The triboelectric results showed well‐correlation not only with the COF, but also with the thermal and mechanical properties of the composite. It is thus, prejudiced that triboelectric investigation can be used as a potential tool to realize/manage the touch‐feeling properties of different products.

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Application of eggshell wastes as valuable and utilizable products: A review

Cited by 152 publications

References 83 publications

Sorption of Cd2+ and Pb2+ on Aragonite Synthesized from Eggshell

Sorption of Cd2+ and Pb2+ on Aragonite Synthesized from Eggshell

Synthesis of Nano-Calcium Oxide from Waste Eggshell by Sol-Gel Method

Eggshell membrane reinforced polypropylene biocomposite and its tactile assessment

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