Simultaneous removal of methyl orange and Cr(VI) using polyethyleneimine-modified corncob-derived carbon material

Liu, Yang; Wang, Song; Zhou, Huan; Li, Xinshu; Duan, Lin; Chen, Shuang; Li, Sanxi; Zhang, Linnan; Zhang, Ailing

doi:10.15376/biores.15.4.7342-7356

Cited by 13 publications

(4 citation statements)

References 31 publications

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“…As cascas do cupuaçu (Theobroma grandiflorum) (Figura 1A) foram adquiridas com produtores rurais na cidade de Rio Preto da Eva, Amazonas e encaminadas para o Laboratório de Processos do DEQ/UFAM. A metodologia adotada seguiu os trabalhos de Hung et al (2023) e Liu et al (2020). Inicialmente, as cascas foram quebradas de forma manual utilizando um martelo (Figura 1B), sendo submetidas a lavagem e secagem em estufa com circulação forçada de ar (Fanem 315SE) a 103 °C ± 2 o C para a determinação da umidade de acordo com a ASTM E871-82 (2006).…”

Section: Preparação E Caracterização Do Carvão Ativadounclassified

Adsorção do corante alaranjado de metila em carvão ativado obtido da casca do cupuaçu

Sousa,

Souza,

Nascimento

et al. 2023

RSD

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A contaminação dos corpos hídricos por substâncias químicas sintéticas, como os corantes têxteis, representa um grave problema ambiental, pois muitos desses compostos são tóxicos e podem causar danos ao meio ambiente e à saúde humana. Este trabalho teve como objetivo avaliar a eficiência do carvão ativado obtido da casca do cupuaçu no processo de adsorção do corante alaranjado de metila. O adsorvente foi preparado por ativação química utilizando ácido fosfórico 85% seguido de carbonização à 500 oC por 60 minutos. Os ensaios de adsorção foram realizados em batelada utilizando diferentes massas do carvão diluídas em solução do corante a 10 mg/L. Os resultados dos testes cinéticos mostraram que o equilíbrio foi alcançado após 10 minutos, com remoção de quase 100%, capacidade máxima de adsorção de 9,50 mg/g (mads = 50 mg) e 19,70 mg/g (mads = 25 mg). Os dados experimentais foram ajustados aos modelos cinéticos de pseudo-primeira ordem, pseudo-segunda ordem e difusão intrapartícula, sendo o de pseudo-segunda ordem o que melhor descreveu o processo, resultando em valores mais aproximados entre a capacidade máxima adsorvida no equilíbrio, experimental e calculado. Desta forma, o carvão ativado da casca do cupuaçu mostrou excelente potencial nos estudos de adsorção do alaranjado de metila tornando-se uma alternativa promissora na remediação de poluentes orgânicos.

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Section: Preparação E Caracterização Do Carvão Ativadounclassified

Adsorção do corante alaranjado de metila em carvão ativado obtido da casca do cupuaçu

Sousa,

Souza,

Nascimento

et al. 2023

RSD

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“…Various techniques for removing these contaminants have been established, namely chemical precipitation, membrane separation, solvent extraction, and physical adsorption. Some of these methods have significant drawbacks, such as limited removal efficiency, high removal cost, and extended removal time [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption has the benefits of being simple to operate, efficient, and inexpensive compared to other approaches. Several efficient adsorbents have been produced in recent years because the adsorbent’s characteristics significantly impact its performance [ 4 ]. The adsorbent chosen in the adsorption process is essential; however, specific adsorbents have a high cost, poor recyclability, and limited capacity, limiting their application.…”

Section: Introductionmentioning

confidence: 99%

Removal of dyes (BG, MG, and SA) from aqueous solution using a novel adsorbent macrocyclic compound

Jalal

Fakhre²

2022

PLoS ONE

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The use of macrocyclic compounds to remove organic dyes is fascinating because they have a wide surface area range and can be used for different things. new (14E, 34E)-7-Hydroxy-7, 8, 22, 23, 24, 25, 26, 27-Octahydro-6H, 16H, 33H Tetrabenzo[f,k,u,z][1,5,13,20]Tetraoxacycloheptacosine-16,33-Dione (HOTTD) was obtained by a simple high-dilution method, and characterized by FTIR, 1H-NMR, FESEM, EDX, and XRD. It worked well in removing organic dyes from aqueous solutions. Contact time, pH, dosage, initial concentration and temperature were studied. The optimum conditions were achieved by using 20 mg/L dye concentration, 50 mg dose of adsorbent and pH 9.0 at room temperature. The adsorption process was remarkably fast and reached equilibrium within 10 min for both Brilliant Green and Malachite Green while 70 min for Safranin. The batch adsorption experiments followed a pseudo 2nd order and Langmuir model with maximum adsorption capacity 19.26 mg/g, 18.28 mg/g, and 14.35 mg/g for Brilliant Green, Malachite green and Safranin respectively. The process was endothermic and spontaneous in nature. Adsorbent regeneration test provides an excellent value 5 times.

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“…In recent years, using natural minerals and wastes to develop new materials has become a new trend. [38] Since using waste to prepare material has the advantage of low cost, heterogeneous base catalysts derived from waste have attracted extensive attention in the field of GC synthesis [39]. These catalysts exhibit an outstanding catalytic performance in the synthesis of GC and could be easily recycled and reused.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Glycerol Carbonate from Glycerol and Dimethyl Carbonate Catalyzed by Solid Base Catalyst Derived from Waste Carbide Slag

Wang

Wang²,

Liu

et al. 2021

International Journal of Polymer Science

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Na2CO3 was loaded onto waste carbide slag (CS) by impregnation-calcination method to prepare the solid base catalyst, which was used to synthesize glycerol carbonate (GC) by the transesterification of glycerol with dimethyl carbonate (DMC). The prepared catalysts were characterized by a scanning electron microscope (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and Brunner−Emmet−Teller (BET) techniques. The catalyst 15 wt.% Na2CO3-CS-800, which was prepared by impregnating CS to the Na2CO3 solution with the concentration of 15 wt.% weight of CS and calcined at 800°C for 3 hours, showed an excellent catalytic ability. When it was applied in the catalytic synthesis of GC, 98.1% glycerol conversion and 96.0% GC yield were achieved in 90 mins at 75°C with the catalyst dosage of 3 wt.% to total reactants and the DMC to glycerol molar ratio of 5. More importantly, the loading of Na2CO3 can effectively improve the reusability of catalyst. The 15 wt.% Na2CO3-CS-800 can still achieve 83.6% glycerol conversion and 80.5% GC yield after five-time reuse. Meanwhile, under the same reaction conditions, the CS-800, which was obtained by calcining CS at 800°C for 3 hours, experienced significant activity reduction with only 15.2% glycerol conversion and 14.1% GC yield after five-time reuse. FTIR and XRD characterization revealed that CO32- might play a key role in preserving active catalytic CaO component by forming protective CaCO3 shell on the catalyst surface.

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Simultaneous removal of methyl orange and Cr(VI) using polyethyleneimine-modified corncob-derived carbon material

Cited by 13 publications

References 31 publications

Adsorção do corante alaranjado de metila em carvão ativado obtido da casca do cupuaçu

Adsorção do corante alaranjado de metila em carvão ativado obtido da casca do cupuaçu

Removal of dyes (BG, MG, and SA) from aqueous solution using a novel adsorbent macrocyclic compound

Synthesis of Glycerol Carbonate from Glycerol and Dimethyl Carbonate Catalyzed by Solid Base Catalyst Derived from Waste Carbide Slag

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