Porosity enhancement of spherical activated carbon: Influence and optimization of hydrothermal synthesis conditions using response surface methodology

Bedin, Karen C.; Cazetta, André L.; Souza, Isis P.A.F.; Pezoti, Osvaldo; Souza, Lucas S.; Souza, Patrícia S.C.; Yokoyama, Jéssica T.C.; Almeida, Vitor C.

doi:10.1016/j.jece.2017.12.069

Cited by 44 publications

(11 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XRD patterns of the natural biochar depicted two broad diffraction peaks centered at 2θ = 22° and 43°, corresponding to the (0,0,2) planes of graphite and the (1,0,1) reflection stemming from the in‐plane structure of graphitic crystallites, respectively. Similar results have been reported in the literature 61‐63 . However, after the impregnation of bismuth, the diffraction intensity of Bi@WBC was notably higher than those of Bi@CBC and Bi@BBC, suggesting that Bi@WBC exhibited a stronger degree of crystallinity and graphitization than the others.…”

Section: Resultssupporting

confidence: 89%

See 1 more Smart Citation

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

In this study, three different types of biochar (biomass materials were beech wood, corncob, and bamboo) were loaded with bismuth to form bismuth impregnated biochars (named respectively as Bi@WBC, Bi@CBC, and Bi@BBC) to investigate their properties (pore structure and surface chemistry characteristics) on methylene blue (MB) removal capacities. Three bismuth impregnated biochars made from different biomass materials were ranked for their adsorption capacity of MB as follows: Bi@WBC > Bi@CBC > Bi@BBC, in which Bi@WBC showed the largest Langmuir adsorption capacity of 178.59 mg g −1 . While the specific surface area (SSA) and pore volume of Bi@WBC were the largest (accounting for 477.74 m 2 g −1 and 0.15 cm 3 g −1 , respectively), according to the FTIR and XPS results, Bi@WBC (72.3%) exhibited a higher proportion of Bi O bonds than the Bi@CBC (52.3%) and Bi@BBC (48.4%) did. Conclusively, the rich porous structure and surface functional groups of Bi@WBC affected the adsorption capacity of MB, and the chemical adsorption provided the main contribution.

show abstract

Section: Resultssupporting

confidence: 89%

“…Similar results have been reported in the literature. [61][62][63] However, after the impregnation of bismuth, the diffraction intensity of Bi@WBC was notably higher than those of Bi@CBC and Bi@BBC, suggesting that Bi@WBC exhibited a stronger degree of crystallinity and graphitization than the others. In Fig.…”

Section: Surface Chemistry Of Bibc Xrd Investigationmentioning

confidence: 98%

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…Table S2 shows the ANOVA for the response model. The response model has a reasonable F-value of 27.04 and a p-value of 0.0001 (less than 0.05), as well as a lack of fit p-value of 0.37 (higher than 0.05) 31 .…”

Section: Resultsmentioning

confidence: 91%

Optimized production, Pb(II) adsorption and characterization of alkali modified hydrochar from sugarcane bagasse

Malool

Moraveji

Shayegan

2021

Sci Rep

View full text Add to dashboard Cite

Today, sugarcane bagasse (SB) is used for bioethanol and biodiesel production, energy generation, and adsorbent synthesis. The goal of this project is to determine the optimized conditions for producing adsorbent from sugarcane bagasse using hydrothermal carbonization (HTC) and KOH activation. To optimize process parameters such as reaction temperature, residence time, ZnCl2/SB mixing ratios, and water/SB mixing ratios, response surface methodology was used. The results revealed that the optimum modified adsorption occurred at 180 °C, 11.5 h, a water to biomass ratio of (5:1), and a ZnCl2 to precursor ratio of (3.5:1). The physicochemical features of optimum activated hydrochar were investigated, as well as batch adsorption experiments. The pseudo-second-order kinetic model and the Langmuir isotherm model were found to fit the experimental results in batch adsorption studies [$${q}_{max}=90.1$$ q max = 90.1 (mg/g)]. Thermodynamic experiments further confirmed the spontaneous and exothermic adsorption mechanism.

show abstract

“…The overlapping bands with peaks at 1695 cm −1 and 1606 cm −1 are due to carbonyl (C=O) stretching vibrations and the stretching of C=C in aromatic rings, respectively [49]. The broad band at 1298 cm −1 is ascribed to C-O bending vibrations [50]. The band at 798 cm −1 is attributed to the C-H vibration in aromatic structures [49].…”

Section: Resultsmentioning

confidence: 99%

Porous Carrageenan-Derived Carbons for Efficient Ciprofloxacin Removal from Water

et al. 2018

View full text Add to dashboard Cite

Porous carbon materials derived from biopolymers are attractive sorbents for the removal of emerging pollutants from water, due to their high specific surface area, high porosity, tunable surface chemistry, and reasonable cost. However, carrageenan biopolymers were scarcely investigated as a carbon source to prepare porous carbon materials. Herein, hydrochars (HCs) and porous activated carbons (ACs) derived from natural occurring polysaccharides with variable sulfate content (κ-, ι- and λ-carrageenan) were prepared and investigated in the uptake of ciprofloxacin, which is an antibiotic detected in water sources and that poses serious hazards to public health. The materials were prepared using hydrothermal carbonization and subsequent chemical activation with KOH to increase the available surface area. The activated carbons were markedly microporous, presenting high specific surface area, up to 2800 m2/g. Activated carbons derived from κ- and λ-carrageenan showed high adsorption capacity (422 and 459 mg/g, respectively) for ciprofloxacin and fast adsorption kinetics, reaching the sorption equilibrium in approximately 5 min. These features place the ACs investigated here among the best systems reported in the literature for the removal of ciprofloxacin from water.

show abstract

Porosity enhancement of spherical activated carbon: Influence and optimization of hydrothermal synthesis conditions using response surface methodology

Cited by 44 publications

References 61 publications

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

Optimized production, Pb(II) adsorption and characterization of alkali modified hydrochar from sugarcane bagasse

Porous Carrageenan-Derived Carbons for Efficient Ciprofloxacin Removal from Water

Contact Info

Product

Resources

About