Structural, morphological, and optical properties of country egg shell derived activated carbon for dye removal

Aravind, M.

doi:10.1016/j.matpr.2020.09.311

Cited by 23 publications

(11 citation statements)

References 19 publications

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“…It is evident from the spectra that functional groups are present in all the samples. The band at 3400–3450 cm −1 represents the O−H vibration that is because of the stretching of surface ‐OH groups or the adsorbed water molecules onto the samples [21] . Small peaks at 2900–2920 cm −1 are assigned to the vibrations of C−H bonds.…”

Section: Resultsmentioning

confidence: 99%

“…The band at 3400-3450 cm À 1 represents the OÀ H vibration that is because of the stretching of surface -OH groups or the adsorbed water molecules onto the samples. [21] Small peaks at 2900-2920 cm À 1 are assigned to the vibrations of CÀ H bonds. The peak observed at 1610-1634 cm À 1 is allocated to the presence of carbonyl group and C=C stretching.…”

Section: Physicochemical Properties Of the Pineapple Peel Derived Activated Carbonmentioning

confidence: 99%

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Electrolytic Study of Pineapple Peel Derived Porous Carbon for All‐Solid‐State Supercapacitors

et al. 2021

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Biowaste derived carbon materials are recently gaining attention owing to their high specific surface area (SSA) and decent electrical conductivity. Herein, pineapple peel derived porous carbon nanosheets have been synthesized at different activation temperatures (PP‐600, PP‐700 and PP‐800). This shows that its high SSA along with hierarchal pore size distribution makes it a suitable electrode material for supercapacitors. Further, the electrochemical performance of the as prepared electrode material was carried out in three different electrolytes viz. acidic (1 M H2SO4), basic (6 M KOH) and neutral (1 M Na2SO4) and among them 1 M H2SO4 electrolyte shows superior electrochemical performance. Furthermore, PP‐800 electrode material displayed highest specific capacitance of 368.8 F/g in 1 M H2SO4 electrolyte, which is much higher when tested and compared in 6 M KOH (34 F/g) and 1 M Na2SO4 (102.7 F/g) electrolytes at a constant current density of 1 A/g. Additionally, symmetrical solid‐state supercapacitor was fabricated by utilizing PP‐800 electrodes and PVA gel electrolyte, that rendered remarkable energy density of ∼43 Wh/kg at a high‐power density of ∼1 kW/kg. The as fabricated PP‐800//PP‐800 device displayed an extraordinary cycle life exhibiting capacitance retention of 83 % after 10000 ultra‐long charge‐discharge cycles.

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Section: Resultsmentioning

confidence: 99%

Section: Physicochemical Properties Of the Pineapple Peel Derived Activated Carbonmentioning

confidence: 99%

Electrolytic Study of Pineapple Peel Derived Porous Carbon for All‐Solid‐State Supercapacitors

et al. 2021

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“…The AC was of interest due to its excellent characteristics such as high surface area, porous surface, high mechanical strength, a large number of active pores, as well as a well-defined porous structure. 16 These characteristics make AC an excellent absorbent medium. 17 In addition, commercial AC is widely used for the removal of organic compounds but is not so effective for the removal of metal ions and inorganic pollutants from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Integrating Ultrafiltration Membranes with Flocculation and Activated Carbon Pretreatment Processes for Membrane Fouling Mitigation and Metal Ion Removal from Wastewater

Matebese

Moutloali

2023

ACS Omega

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The presence of metal ions in an aqueous medium is an ongoing challenge throughout the world. Processes employed for metal ion removal are developed continuously with the integration of these processes taking center stage. Herein, an integrated system consisting of flocculation, activated carbon (AC), and an ultrafiltration (UF) membrane was assessed for the removal of multiple metal ions contained in wastewater generated from a university chemistry research laboratory. The quality of the wastewater was established before and further determined after treatment with inductively coupled plasma optical emission spectrometry (ICP-OES) for metal content, total dissolved solids (TDS), turbidity, electrical conductivity (EC), and pH. Assessing the spent AC indicated minimal structural changes, indicating a potential for further reuse; for instance, the BET for both the pristine and spent AC exhibited type I isotherms with a mesoporous structure, indicating no major structural changes due to metal complexation. The relative performance of the integrated system indicated that the use of flocculation improved the water quality of metal-laden wastewater for safe disposal. The integrated treatment systems exhibited high removal efficiencies between 80 and 99.99% for all the metal ions except for Mn (<0.008 mg L–1) and Cr (<0.016 mg L–1) both at ca. 70%, indicative of the positive influence of the polyelectrolyte in the treatment process. The fabricated UiO-66-NH2@GO membranes (Z4 and Z5) exhibited high fouling resistance and reusability potential as well as relatively high pure water flux. Consequently, the integrated process employed for the treatment of laboratory metal-containing wastewater is promising as a generic approach to improving the quality of metal-containing wastewater to meet the standards of discharging limits in South Africa.

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“…Among the large number of adsorbents, activated carbons (ACs) exhibited advantages over other adsorbents for their high surface area, microporous character, chemical nature of their surface, and high adsorption capacity when used on wastewater with different dye molecules [ 12 ]. Most of the activated carbon materials used for adsorption research come from fruit peel [ 13 ], rubber tires [ 14 ], textile sludge [ 15 ], crab shell [ 16 ], and egg shell [ 17 ]. Recently, agricultural wastes have received considerable attention due to their abundant surface functional groups, porous structures, additional inorganic minerals, and high surface area.…”

Section: Introductionmentioning

confidence: 99%

A Study on Machine Learning Methods’ Application for Dye Adsorption Prediction onto Agricultural Waste Activated Carbon

et al. 2021

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The adsorption of dyes using 39 adsorbents (16 kinds of agro-wastes) were modeled using random forest (RF), decision tree (DT), and gradient boosting (GB) models based on 350 sets of adsorption experimental data. In addition, the correlation between variables and their importance was applied. After comprehensive feature selection analysis, five important variables were selected from nine variables. The RF with the highest accuracy (R2 = 0.9) was selected as the best model for prediction of adsorption capacity of agro-waste using the five selected variables. The results suggested that agro-waste characteristics (pore volume, surface area, agro-waste pH, and particle size) accounted for 50.7% contribution for adsorption efficiency. The pore volume and surface area are the most important influencing variables among the agro-waste characteristics, while the role of particle size was inconspicuous. The accurate ability of the developed models’ prediction could significantly reduce experimental screening efforts, such as predicting the dye removal efficiency of agro-waste activated carbon according to agro-waste characteristics. The relative importance of variables could provide a right direction for better treatments of dyes in the real wastewater.

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Structural, morphological, and optical properties of country egg shell derived activated carbon for dye removal

Cited by 23 publications

References 19 publications

Electrolytic Study of Pineapple Peel Derived Porous Carbon for All‐Solid‐State Supercapacitors

Electrolytic Study of Pineapple Peel Derived Porous Carbon for All‐Solid‐State Supercapacitors

Integrating Ultrafiltration Membranes with Flocculation and Activated Carbon Pretreatment Processes for Membrane Fouling Mitigation and Metal Ion Removal from Wastewater

A Study on Machine Learning Methods’ Application for Dye Adsorption Prediction onto Agricultural Waste Activated Carbon

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