Photodegradation of methylene blue dye by hematite-biochar composite prepared from Dendrocalamus asper using microwave-assisted pyrolysis (MAP)

Astuti, W; Meysanti, D; Salsabila, M T; Sulistyaningsih, T; Rusiyanto,

doi:10.1088/1755-1315/1203/1/012053

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…Under these conditions, the adsorption capacity could reach to 67.46 ± 0.17 mg/g. Compared with the adsorption effect of other biochar on MB (Table 2 ) (Yu et al 2021 ; Pinky et al 2023 ; Astuti et al 1203 ; Roy et al 2022 ), we could see that KBBC-900 had a great removal effect. However, it was worth noting that it had the possibility of further improvement.…”

Section: Resultsmentioning

confidence: 69%

Removal of methylene blue by porous biochar obtained by KOH activation from bamboo biochar

Peng

Liu

et al. 2023

Bioresour. Bioprocess.

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A series of activated biochar (KBBC-700, KBBC-800 and KBBC-900) which were modified by KOH and pyrolysis at various temperatures from ball-milling bamboo powder were obtained. The physicochemical properties and pore structures of activated biochar were investigated by scanning electron microscopy (SEM), fourier transform infrared spectoscopy (FT-IR), X-ray diffraction (XRD) and N2 adsorption/desorption. The adsorption performance for the removal of methylene blue (MB) was deeply studied. The results showed that KBBC-900 obtained at activation temperature of 900 °C exhibited a great surface area which reached 562 m2/g with 0.460 cm3/g of total pore volume. The enhancement of adsorption capacity could be ascribed to the increase of surface oxygen-containing functional groups, aromatization and mesoporous channels. The adsorption capacity was up to 67.46 mg/g under the optimum adsorption parameters with 2 g/L of adsorbent dose, 11 of initial solution pH and 298 K of the reactive temperature. The adsorption capacity was 70.63% of the first time after the material was recycled for three cycles. The kinetics indicated that the adsorption equilibrium time for MB on KBBC-900 was of about 20 min with the data fitted better to the pseudo-second-order kinetics model. The adsorption process was mainly dominated by chemical adsorption. Meanwhile, the adsorption isotherm showed that the Langmuir model fitted the best, and thermodynamic parameters revealed that the adsorption reaction was the endothermic nature and the spontaneous process. Adsorption of MB mainly attributed to electrostatic interactions, cation-π electron interaction and redox reaction. This study suggested that the activated biochar obtained by KOH activation from bamboo biochar has great potentials in the practical application to remove MB from wastewater. Graphical Abstract

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Section: Resultsmentioning

confidence: 69%

Removal of methylene blue by porous biochar obtained by KOH activation from bamboo biochar

Peng

Liu

et al. 2023

Bioresour. Bioprocess.

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The application of magnetite biochar composite derived from parthenium hysterophorus for the adsorption of methylene blue from aqueous solution

Teweldebrihan,

Gnaro,

Dinka

2024

Front. Environ. Sci.

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The removal of toxic and harmful dyes like methylene blue (MB) from textile wastewater is necessary to reduce environmental pollution. Therefore, this study is aimed at removing MB from an aqueous solution using magnetite-doped biochar of parthenium hysterophorus. Biochar was prepared through pyrolysis techniques at 500 ℃ for 2 h whereas the magnetite and composite material were developed using coprecipitation methods. Herein, NaNO3 and FeSO4. 7H2O were utilized as precursor materials and NaOH as a precipitating agent for preparation of magnetite. Furthermore, pH point of zero charge (pHpzc), Scanning Electron microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and X-ray Diffraction (XRD) are characterization techniques used to evaluate the nature of the composite material. On the other hand, a full factorial design involving four factors at two levels (24) such as pH (3 and 9), contact time (10 and 40 min), initial dye concentration (100 and 150 mg/L) and adsorbent dosage of 0.01 and 0.04 g/100 mL was used to design and optimize the batch adsorption of MB from an aqueous solution. As a result, a maximum removal efficiency of 99.99% was attained at optimum operating conditions of pH 9, contact time 40 min, initial MB concentration 100 mg/L and adsorbent dosage of 0.04 g/100 mL. Langmuir, Freundlich and Temkin isotherm models were used to investigate the adsorption isotherm in which Freundlich isotherm with a maximum R2 of 0.98 was found to describe the adsorption process inferring multilayer and heterogeneous surface interaction. Additionally, the thermodynamics study depicts that the nature of the adsorption is spontaneous, endothermic and feasible. On the other hand, the chemosorption nature is revealed by the pseudo second kinetics model with a maximum R2 of 0.99. Finally, the remarkable reusability ranging from 99.98% to 97.6% for five consecutive cycles proved that the magnetic biochar derived from parthenium hysterophorus can be used as an effective adsorbent for the decolourization of MB saturated effluent at an industrial scale.

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Photodegradation of methylene blue dye by hematite-biochar composite prepared from Dendrocalamus asper using microwave-assisted pyrolysis (MAP)

Cited by 2 publications

References 21 publications

Removal of methylene blue by porous biochar obtained by KOH activation from bamboo biochar

Removal of methylene blue by porous biochar obtained by KOH activation from bamboo biochar

The application of magnetite biochar composite derived from parthenium hysterophorus for the adsorption of methylene blue from aqueous solution

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