Synthesis and characterisation of activated carbon from agroindustrial waste—Preliminary study of 17β-estradiol removal from aqueous solution

Rovani, Suzimara; Rodrigues, Amanda Goulart; Medeiros, Leonardo Ferreira; Cataluña, Renato; Lima, Éder C.; Fernandes, Andreia Neves

doi:10.1016/j.jece.2016.03.030

Cited by 55 publications

(23 citation statements)

References 42 publications

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“…Furthermore, SCGs have a higher calorific value than many organic wastes [15]. On average, SCGs contain up to 20% of lipids [16] and lignocellulosic material, which can be used for bioenergy [17][18][19] along with various applications such as absorbents [20], activated carbon [21][22][23] support for catalyst [24], catalyst source of antioxidants [25][26], biodiesel [13][14] or biofuel pellets [15]. The production of biodiesel is an especially attractive prospect given the urgent need to decarbonise liquid fuels and the limited viable sources of low carbon liquid fuel.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Najdanovic‐Visak

Lee

Tavares

et al. 2017

Journal of Environmental Chemical Engineering

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Resource limits, environmental concerns and unstable petroleum costs have led to an increased effort to develop alternative liquid fuels. Purpose grown feedstocks are expensive and demand additional resources such as land and water. Spent coffee grounds (SCGs) are a good potential low-cost feedstock, however, processing times and costs must be lowered in order to be cost competitive with fossil fuels.In this work, we investigated the kinetics of oil extraction from SCGs to explore if current methods of oil extraction could be hastened and an integrated process which couples oil extraction and conversion to biodiesel stages in one single step (in situ transesterification) which could significantly cut down biodiesel production costs.Kinetics of oil extraction from SCGs using n-hexane as solvent was studied as a function of temperature, solvent to solid ratio and water content. We have found that oil extraction times could be significantly reduced to 10 minutes due to high diffusion coefficients. Further, we demonstrate, for the first time, the successful in situ transesterification of SCGs using different concentration of sodium hydroxide as catalyst and methanol to oil mole ratio, promising lower biodiesel production costs from a ubiquitous waste product around the world.

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Section: Introductionmentioning

confidence: 99%

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Najdanovic‐Visak

Lee

Tavares

et al. 2017

Journal of Environmental Chemical Engineering

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“…However, due to its high cost of production and regeneration, largescale application is limited with an increase in interest in organic matrix alternatives. These matrixes are in line with sustainable development and reduce the total cost of production of activated carbons (DURAL et al, 2011;ROVANI et al, 2016).…”

Section: Introductionmentioning

confidence: 77%

“…In addition, the conversion of these residues into value-added products such as activated carbon could solve environmental problems such as accumulation of agricultural waste, water and air pollution, as well as being efficient in the adsorption of pollutants (Nor et al, 2013). In the last years, numerous studies have reported the use of activated carbon obtained through the use of residues of different biomasses, such as rice husk (KALDERIS et al, 2008), tobacco residues (KILIC; APAYDIN-VAROL; PUTUN, 2011), orange peel (KOSEOGLU; AKMIL-BASAR, 2015), apple bagasse (ROVANI et al, 2016), Phragmites australis (KANKILIÇ et al, 2016;AHMED, 2017) and shell of fruits (ISLAM et al, 2017). Among the various biomass residues studied, tree leaves have also been considered as potentially promising raw material for the production of activated carbon (SUMATHI et al, 2009;NOR et al, 2013;KANKILI et al, 2016;AHMED, 2017).…”

Section: Introductionmentioning

confidence: 99%

Production and Characterization of Activated Biochar of Cássia Fistula L. Leaves

Tomassoni

Schneider

Giroletti

et al. 2020

R. gest. sust. ambient.

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A new activated biochar was produced by carbonizing Cássia fistula L. leaves and its characterization was performed. Scanning Electron Microscopic (SEM) images of the activated biochar showed morphology with numerous irregular cavities and pores. BET surface area and total pore volume of produced adsorbent were 192 m².g-1 and 0.108 cm3.g-1, respectively. Mean porous diameter of the produced biochar was 2.263 nm, characterizing a mesoporous material. Crystallinity and functional groups of the adsorbent were determined by X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy analyses, respectively. The pH of zero charge point (pHzcp) observed was equal to 10, demonstrating that the activated biochar has a negative surface, which facilitates the adsorption of positively charged compounds in water and wastewater treatment. Tree leaves of Cássia fistula L. represent a promising raw material for activated biochar production, given their availability and characteristics of the adsorbent produced. The use of tree leaves for activated biochar production can reduce the operational costs of adsorption process, besides providing the use of a residue for a more noble purpose.

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“…Typically, activation method is a well-established and efficient route to punch pores into carbon media [63][64][65]. The PC prepared by activation method would usually have 4-50 times higher surface area than these non-activated PC [66].…”

Section: Activation Methodsmentioning

confidence: 99%

Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption

et al. 2019

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HIGHLIGHTS• The synthetic methods and corresponding mechanisms of porous carbon (PC)-based nanostructures from biomass resource are reviewed.• The application of biomass-derived PC in microwave absorption is discussed in terms of structure and composition optimization.ABSTRACT Currently, electromagnetic (EM) pollution poses severe complication toward the operation of electronic devices and biological systems. To this end, it is pertinent to develop novel microwave absorbers through compositional and structural design. Porous carbon (PC) materials demonstrate great potential in EM wave absorption due to their ultralow density, large surface area, and excellent dielectric loss ability. However, the large-scale production of PC materials through low-cost and simple synthetic route is a challenge. Deriving PC materials through biomass sources is a sustainable, ubiquitous, and low-cost method, which comes with many desired features, such as hierarchical texture, periodic pattern, and some unique nanoarchitecture. Using the bio-inspired microstructure to manufacture PC materials in mild condition is desirable. In this review, we summarize the EM wave absorption application of biomass-derived PC materials from optimizing structure and designing composition. The corresponding synthetic mechanisms and development prospects are discussed as well. The perspective in this field is given at the end of the article.

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Synthesis and characterisation of activated carbon from agroindustrial waste—Preliminary study of 17β-estradiol removal from aqueous solution

Cited by 55 publications

References 42 publications

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Kinetics of extraction and in situ transesterification of oils from spent coffee grounds

Production and Characterization of Activated Biochar of Cássia Fistula L. Leaves

Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption

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