Production of activated biochar from coconut fiber for the removal of organic compounds from phenolic

Bispo, Mozart Daltro; Schneider, Jaderson K.; Oliveira, Diego da Silva; Tomasini, Débora; Maciel, Gabriela Pereira da Silva; Schena, Tiago; Onorevoli, Bruna; Bjerk, Thiago Rodrigues; Jacques, Rosângela Assis; Krause, Laíza Canielas; Caramão, Elina Bastos

doi:10.1016/j.jece.2018.04.029

Cited by 36 publications

(11 citation statements)

References 49 publications

(6 reference statements)

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“…In addition, based on elemental analysis of CHN, it was found that the content was equal to C: 46.04%, H: 6.18%, and N: 0.77%. These values are similar to those obtained by other researchers during analyses of organic materials (Bispo et al 2018;Chwastowski et al 2017).…”

Section: Materials Characterizationsupporting

confidence: 92%

Equilibrium and Kinetic Study of Ammonium Sorption by Raphia farinifera

Staroń

Sorys

Chwastowski

2019

Water Air Soil Pollut

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The study investigated the sorption capacity of biosorbent-raphia sp. against ammonia. Raphia fibers were used without and with the modification of its surface with NaCl, NaNO 3 , and K 2 SO 4 . The data was analyzed in the state of equilibrium using four isotherm models such as Langmuir, Freudlich, Temkin, and Dubinin-Radushkevich. The equilibrium of ammonia sorption for all studied systems was best described by the Freudlich isotherm model. On its basis, it can be assumed that the studied process is of chemical nature, which results from the value of the coefficient 1/n < 1. In order to confirm the sorption mechanism, analysis of the kinetics of the ammonia sorption process on raphia fibers was performed. Four kinetic models of sorption were calculated: pseudo-first-order model, pseudosecond-order model, Elovich model, and Webber-Morris intermolecular diffusion model. The sorption kinetics of the modeled ammonia waste were carried out using unmodified palm fibers and all kinds of surface modification. This process was best described by the pseudo-second-order sorption model, which can be considered as a confirmation of the chemical nature of ammonia sorption on raphia sp. fibers.

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Section: Materials Characterizationsupporting

confidence: 92%

Equilibrium and Kinetic Study of Ammonium Sorption by Raphia farinifera

Staroń

Sorys

Chwastowski

2019

Water Air Soil Pollut

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“…The results showed that the content of elements were equal to: C-46.04%, H-6.18%, and N-0.77%. The contents of C, H, and N in raphia are similar to the content of these elements in materials of organic origin (Bispo et al 2018;Chwastowski et al 2017). The presence of these elements is also observed in the FTIR analysis.…”

Section: Sorbent Characterizationsupporting

confidence: 68%

Sorption behavior of methylene blue from aqueous solution by raphia fibers

Staroń

Chwastowski

Banach

2019

Int. J. Environ. Sci. Technol.

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This research shows a method of elimination of methylene blue from aqueous solutions using raphia fiber. Sorption was applied in a bath system and in the system with mixing and online measurement. The obtained data in equilibrium can suggest adjusting the sorption isotherm model and calculation of the maximum sorption capacities. The Langmuir isotherm model has the highest correlation coefficient R 2 which shows that the adsorption process of methylene blue on the raphia fibers is a monolayer adsorption process. On the other hand, the Freundlich isotherm is also well fitted, which may indicate that the isotherm is also well adapted, while in the system with mixing and online measurement, the highest matching factor is characterized by the Freundlich isotherm model. The pseudo-second-order rate model is best fit for the sorption kinetics, on basis of which it can be concluded that the sorption rate-limiting step is chemisorption.

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“…In addition, it was known that biochar is characterized by low surface area. Hence, to increase its capacity as adsorbent, it is beneficial to conduct the activation process using chemical such as sodium carbonate [45]. Besides, the post physical treatment such as ultrasound treatment [46] and pulverization is also beneficial since it help to create new external surface area [42].…”

Section: Brunauer-emmett-teller (Bet)mentioning

confidence: 99%

Methylene Blue Removal Using Coconut Shell Biochar Synthesized Through Microwave-Assisted Pyrolysis

et al. 2020

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Indonesia is the world’s second largest producer of coconut. This at the same time resulted in huge generation of coconut shell waste that need to be properly managed to prevent environmental contamination such as water, air and soil pollution. Current techniques of physical and thermal processing are time and energy consuming. This study reports on the conversion of coconut shell biomass into biochar using microwave-assisted pyrolysis (MAP). The MAP processes were carried out at different microwave power (550-650W) and residence time (15-25 minutes). Two of the highest biochar yields were obtained at 550W with the residence times of 15 minutes (91.31 wt%, termed as S1) and 20 minutes (83.88 wt%, termed as S2), respectively. Both values were higher than biochar yield obtained using conventional pyrolysis process i.e. 30.10 wt%. Both S1 and S2 showed considerable capacity to remove 0.6875 mg.g-1 and 0.5165 mg.g-1 methylene blue which had the initial concentration of 25 mg.L-1. The adsorption efficiencies of S1 and S2 biochars were 55.00% and 41.32%, respectively. Results obtained from the FTIR, FESEM and BET analysis also supported the methylene blue removal properties of both S1 and S2, respectively. As a conclusion, coconut shell showed potential as a useful raw material to produce biochar that can be used for methylene blue removal from solution. Nevertheless, more investigation need to be carried out prior to commercialization venture of the coconut-shell based biochar.

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Production of activated biochar from coconut fiber for the removal of organic compounds from phenolic

Cited by 36 publications

References 49 publications

Equilibrium and Kinetic Study of Ammonium Sorption by Raphia farinifera

Equilibrium and Kinetic Study of Ammonium Sorption by Raphia farinifera

Sorption behavior of methylene blue from aqueous solution by raphia fibers

Methylene Blue Removal Using Coconut Shell Biochar Synthesized Through Microwave-Assisted Pyrolysis

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