Preparation of magnesium Ferrite-Doped magnetic biochar using potassium ferrate and seawater mineral at low temperature for removal of cationic pollutants

Qin, Wen; Chen, Yijia; Rao, Xin; Yang, Run Qing; Zhao, Yiming; Li, Jihui; Xu, Song; Liang, Zhenyi

doi:10.1016/j.biortech.2022.126860

Cited by 24 publications

(7 citation statements)

References 44 publications

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“…[47] Raman spectroscopy is an excellent tool for biochar characterization with an easy sample preparation, and shows high sensitivity with low interference. [48] Raman spectrographs 20.20 - [a] 0.0042 [40] Seawater derived magnetic biochar 84.05 - [a] 4.38 - [a] 0.0819 [40] Pomelo peel pristine biochar 211.55 - [a] 5.39 - [a] 0.04 [39] Pomelo peel-derived magnetic biochar 71.69 - [a] 4.21 - [a] 0.11 [39] Rice husk-derived biochar 165.9…”

Section: Modelsmentioning

confidence: 99%

Easy Recovered Magnetic Bark Biochar for Methylene Blue Removal: Preparation Characterization and Adsorption Parameters Study

Zeghioud,

Mouhamadou

2023

ChemistrySelect

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In this study, two types of magnetic biochars (Magnetic Bark Biochar with protocol 1 (MBB1) and Magnetic Bark Biochar with protocol 2 (MBB2)) were synthesized using pristine poplar bark biochar (PBB) via co‐precipitation. The two prepared magnetic biochars were tested to investigate the aqueous methylene blue (MB) removal performances. MB dye was used as a common pollutant for biochar quality evaluation and the obtained performance in this work was compared with literature. Different analysis techniques such as Scanning Electron Microscope (SEM), Energy Dispersive X‐ray Spectroscopy (EDS), Brunauer‐Emmett‐Teller (BET), porosimetry, Raman spectrometry and Fourier Transform Infrared spectroscopy (FTIR) were used to characterize the obtained materials. Biochars have a microporous structure with an average pore diameter of less than 0.26 nm. Magnetization of bark biochar leads to a loss in specific surface area (from 263.45 m2/g for PBB to 39.22 and 73.02 m2/g for MBB1 and MBB2, respectively) and an increase in total porosity by 85.11 and 12.72 %, respectively. MB adsorption process on MBB1 and MBB2 was best described by the pseudo‐first‐order kinetic model (R2=0.98) and by pseudo‐second‐order kinetic model for PBB (R2=0.9). The Langmuir monolayer adsorption and Marczewski‐jaroniec (M‐J) models presented the best fit for both PBB and MBB2 showing favourable adsorption process. Based on maximum adsorption capacity (qm: 32.98 mg/g) and the highest R2 value (0.96), MBB1 adsorption isotherm was well described by Langmuir model. Isotherm study revealed that MBB2 has the highest adsorption capacity of 49.02 mg/g followed by PBB with 37.85 mg/g. MB‐biochar interactions are dominated by chemisorption regarding the PBB and by physisorption concerning the magnetic biochars.

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Section: Modelsmentioning

confidence: 99%

Easy Recovered Magnetic Bark Biochar for Methylene Blue Removal: Preparation Characterization and Adsorption Parameters Study

Zeghioud,

Mouhamadou

2023

ChemistrySelect

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“…In the present study, R L values were between 0-1, indicating that the adsorption process under experimental conditions is conducive to proceeding [67]. Magnetic biochar nanocomposite from raw avocado peel 62.1 [71] Seawater/K 2 FeO 4 -derived magnetic biochar from jackfruit peel 129.61 [72] Magnetic biochar from agricultural waste 55.0 [73] Fenton-modi ed biochar from rubber tree bark 258.14 [74] Hydrochar magnetic adsorbents from Chinese medicine industry waste 60 [75] Citric acid-modi ed Juncus effusus pith powders loaded with Fe 3 O 4 nanoparticles…”

Section: Adsorption Isothermmentioning

confidence: 69%

Easily separated and sustainable cellulose-based adsorbent using a facile two-steps modification for highly efficient methylene blue removal

Zhou

Yan

Zhang

et al. 2022

Preprint

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Eco-friendly cellulose-based magnetic adsorbents have attracted great attention in the field of dye adsorption recently. Herein, we utilized the pith of biomass Juncus effusus (JE) to synthesize a novel type of magnetic adsorbents for the treatment of wastewater containing methylene blue (MB). After esterification and magnetization two-steps modification, the obtained magnetic citric acid-modified JE pith powders (M-CA/JEPP) showed outstanding adsorption properties. For 50 mg/L MB dye solution, the adsorption efficiency could reach 98.34% within 10 minutes under basic condition and the maximum adsorption capacity was 293.132 mg/g at 303 K. The adsorption efficiency could also keep a high level in five cycles. Moreover, magnetization overcomes the disadvantages of JE powders density being small which is very difficult to collect, and a 24.8 emu/g saturation magnetization was achieved. In the other words, this magnetic adsorbent has excellent reusability and it is easily to be separated from water, which provides new insights for development of cellulose-based adsorbents to remove dye in aqueous systems.

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“…The significant decrease in I D /I G values indicated that the higher pyrolysis temperature improved the graphitization degree of biochar microspheres. For the higher degree of graphitization, the biochar microspheres might have had a stronger affinity for oil agents [ 20 , 21 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Biochar Composite Microspheres and Their Ability for Removal with Oil Agents in Dyed Wastewater

Shen,

Jin,

Chen

et al. 2023

Materials

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Oil agents produced from the degreasing treatment of synthetic fibers are typical pollutants in wastewater from printing and dyeing, which may cause large-scale environmental pollution without proper treatment. Purifying oily dye wastewater (DTY) at a low cost is a key problem at present. In this study, biochar microspheres with oil removal ability were prepared and derived from waste bamboo chips using the hydrothermal method. The structure of the biochar microsphere was regulated by activation and modification processes. Biochar microspheres were characterized, and their adsorption behaviors for oily dye wastewater were explored. The results show that the adsorption efficiency of biochar microspheres for oily dye wastewater (DTY) was improved significantly after secondary pyrolysis and the lauric acid grafting reaction. The maximum COD removal quantity of biochar microspheres for DTY was 889 mg/g with a removal rate of 86.06% in 30 min. In addition, the kinetics showed that chemisorption was the main adsorption manner. Considering the low cost of raw materials, the application of biochar microspheres could decrease the cost of oily wastewater treatment and avoid environmental pollution.

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Preparation of magnesium Ferrite-Doped magnetic biochar using potassium ferrate and seawater mineral at low temperature for removal of cationic pollutants

Cited by 24 publications

References 44 publications

Easy Recovered Magnetic Bark Biochar for Methylene Blue Removal: Preparation Characterization and Adsorption Parameters Study

Easy Recovered Magnetic Bark Biochar for Methylene Blue Removal: Preparation Characterization and Adsorption Parameters Study

Easily separated and sustainable cellulose-based adsorbent using a facile two-steps modification for highly efficient methylene blue removal

Preparation of Biochar Composite Microspheres and Their Ability for Removal with Oil Agents in Dyed Wastewater

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