A novel study on synthesis of egg shell based activated carbon for degradation of methylene blue via photocatalysis

Ahmad, Awais; Jini, D.; Aravind, M.; Parvathiraja, C.; Ali, Rabia; Kiyani, Maryam Zaheer; Alothman, Asma A.

doi:10.1016/j.arabjc.2020.10.002

Cited by 100 publications

(44 citation statements)

References 32 publications

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“…3B). Similar morphological features were reported by Minakshi et al (2019) and Ahmad et al (2020), showing the structure of eggshells-CaCO 3 having an irregular surface structure with a size distribution~200 nm and 89 nm, respectively. The morphology of the RHSiO 2 , as shown in Fig.…”

Section: Fesem/edx Analysissupporting

confidence: 85%

Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO₂/CaCO₃) nanocomposite synthesized from waste eggshells and rice husks

Bwatanglang¹,

Magili²,

Kaigamma³

2021

PeerJ Physical Chemistry

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A bio-based Silica/Calcium Carbonate (CS–SiO2/CaCO3) nanocomposite was synthesized in this study using waste eggshells (ES) and rice husks (RH). The adsorbents (ESCaCO3, RHSiO2 and, CS-SiO2/CaCO3) characterized using XRD show crystallinity associated with the calcite and quartz phase. The FTIR of ESCaCO3 shows the CO−23 group of CaCO3, while the spectra of RHSiO2 majorly show the siloxane bonds (Si–O–Si) in addition to the asymmetric and symmetric bending mode of SiO2. The spectra for Chitosan (CS) show peaks corresponding to the C=O vibration mode of amides, C–N stretching, and C–O stretching. The CS–SiO2/CaCO3 nanocomposite shows the spectra pattern associated with ESCaCO3 and RHSiO2. The FESEM micrograph shows a near monodispersed and spherical CS–SiO2/CaCO3 nanocomposite morphology, with an average size distribution of 32.15 ± 6.20 nm. The corresponding EDX showed the representative peaks for Ca, C, Si, and O. The highest removal efficiency of phenol over the adsorbents was observed over CS–SiO2/CaCO3 nanocomposite compared to other adsorbents. Adsorbing 84–89% of phenol in 60–90 min at a pH of 5.4, and a dose of 0.15 g in 20 ml of 25 mg/L phenol concentration. The result of the kinetic model shows the adsorption processes to be best described by pseudo-second-order. The highest correlation coefficient (R2) of 0.99 was observed in CS-SiO2/CaCO3 nanocomposite, followed by RHSiO2 and ESCaCO3. The result shows the equilibrium data for all the adsorbents fitting well to the Langmuir isotherm model, and follow the trend CS-SiO2/CaCO3 > ESCaCO3 > RHSiO2. The Langmuir equation and Freundlich model in this study show a higher correlation coefficient (R2 = 0.9912 and 0.9905) for phenol adsorption onto the CS–SiO2/CaCO3 nanocomposite with a maximum adsorption capacity (qm ) of 14.06 mg/g compared to RHSiO2 (10.64 mg/g) and ESCaCO3 (10.33 mg/g). The results suggest good monolayer coverage on the adsorbent’s surface (Langmuir) and heterogeneous surfaces with available binding sites (Freundlich).

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Section: Fesem/edx Analysissupporting

confidence: 85%

Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO₂/CaCO₃) nanocomposite synthesized from waste eggshells and rice husks

Bwatanglang¹,

Magili²,

Kaigamma³

2021

PeerJ Physical Chemistry

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“…In addition, the peaks of CCM at 39.5, 47.5, 48.5, and 57.5° represent the crystal phases of the different keratin-based biochars. The diffraction peaks at 39.5, 47.5, 48.5, and 57.5 correspond to the Bragg reflection planes of 107, 206, 304, and 314, respectively [ 44 ]. Both KCMa–C and KCMa–T have a wide diffraction peak in the range of 20–30°.…”

Section: Resultsmentioning

confidence: 99%

Preparing Biochars from Cow Hair Waste Produced in a Tannery for Dye Wastewater Treatment

Song

Wang

et al. 2021

Materials

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A large amount of cow hair solid waste is produced in leather production, and a reasonable treatment should be developed to reduce the pollution. In this study, cow hair waste was utilized as the carbon precursor, and N2 was determined to be the most appropriate atmosphere for biochar preparation. We performed a comparison of the properties of biochars that were prepared with different methods, including direct pyrolysis, KOH activation, and the MgO template method. The characterization results show that the highest specific surface area reaches 1753.075 m2/g. Subsequently, the keratin that was extracted from cow hair and purified was used to prepare a biochar with the MgO template method, obtaining an orderly sponge structure. The biochar from cow hair waste was further used to absorb direct blue dye wastewater, and its adsorption capacity reached 1477 mg/g after 10 h with a high efficiency of regeneration. This study successfully utilized keratin-containing hair waste and provides a new source for synthesizing carbon materials for dye wastewater treatment.

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“…This novel polysaccharide has potential applications in all aspects of food, drug delivery [23], gene delivery, tissue engineering [24], and wound dressing [25][26][27] and for wastewater treatment [28]. Na-Alg has novel applications in the field of drug delivery; for instance, it has been used for the delivery of 5 FU [29], Cur [30], anticancer agents (microcapsules) [31], ibuprofen [32], and RIF. The drug delivery technology of sodium alginate plays a key role in the field of biotechnology.…”

Section: Application Of Sodium Alginatementioning

confidence: 99%

A Critical Review on the Synthesis of Natural Sodium Alginate Based Composite Materials: An Innovative Biological Polymer for Biomedical Delivery Applications

et al. 2021

Self Cite

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Sodium alginate (Na-Alg) is water-soluble, neutral, and linear polysaccharide. It is the derivative of alginic acid which comprises 1,4-β-d-mannuronic (M) and α-l-guluronic (G) acids and has the chemical formula (NaC6H7O6). It shows water-soluble, non-toxic, biocompatible, biodegradable, and non-immunogenic properties. It had been used for various biomedical applications, among which the most promising are drug delivery, gene delivery, wound dressing, and wound healing. For different biomedical applications, it is used in different forms with the help of new techniques. That is the reason it had been blended with different polymers. In this review article, we present a comprehensive overview of the combinations of sodium alginate with natural and synthetic polymers and their biomedical applications involving delivery systems. All the scientific/technical issues have been addressed, and we have highlighted the recent advancements.

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A novel study on synthesis of egg shell based activated carbon for degradation of methylene blue via photocatalysis

Cited by 100 publications

References 32 publications

Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO₂/CaCO₃) nanocomposite synthesized from waste eggshells and rice husks

Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO₂/CaCO₃) nanocomposite synthesized from waste eggshells and rice husks

Preparing Biochars from Cow Hair Waste Produced in a Tannery for Dye Wastewater Treatment

A Critical Review on the Synthesis of Natural Sodium Alginate Based Composite Materials: An Innovative Biological Polymer for Biomedical Delivery Applications

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A novel study on synthesis of egg shell based activated carbon for degradation of methylene blue via photocatalysis

Cited by 100 publications

References 32 publications

Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO2/CaCO3) nanocomposite synthesized from waste eggshells and rice husks

Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO2/CaCO3) nanocomposite synthesized from waste eggshells and rice husks

Preparing Biochars from Cow Hair Waste Produced in a Tannery for Dye Wastewater Treatment

A Critical Review on the Synthesis of Natural Sodium Alginate Based Composite Materials: An Innovative Biological Polymer for Biomedical Delivery Applications

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Product

Resources

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Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO₂/CaCO₃) nanocomposite synthesized from waste eggshells and rice husks

Adsorption of phenol over bio-based silica/calcium carbonate (CS-SiO₂/CaCO₃) nanocomposite synthesized from waste eggshells and rice husks