Facile synthesis of magnetic biochar/Fe3O4 nanocomposites using electro-magnetization technique and its application on the removal of acid orange 7 from aqueous media

Jung, Kyung-Won; Choi, Brian Hyun; Jeong, Tae-Un; Ahn, Kyu‐Hong

doi:10.1016/j.biortech.2016.09.035

Cited by 109 publications

(17 citation statements)

References 17 publications

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“…The sharpness of the XRD reflection peaks indicated that the Fe 3 O 4 phase deposited on the surfaces of the WB sheets was highly crystalline. This probably explains why the magnetic properties as well as the face-centered cubic structure of Fe 3 O 4 were maintained [9]. A peak related to amorphous graphite can be seen at 26.6 • (see Figure 2A(b)) [21].…”

Section: Resultsmentioning

confidence: 75%

“…To address this issue, the electron-transfer reaction has been improved by using high-performance iron nanoparticles in the presence of SO 4 −• radicals in a manner similar to that of the Fenton reaction [8]. In this process, a suitable magnetic oxide (namely, iron oxide) and its composite are used for PS oxidation to yield an effective reactive species because iron oxide is a more effective and stable catalyst as compared to soluble Fe 2+ ions for the catalytic oxidation of organic pollutants [9][10][11]. Biochar is a readily available porous carbonaceous material that is produced as a solid by-product by the thermal decomposition of organic materials under oxygen-limited conditions and subsequent modification by chemical and physical methods [12].…”

Section: Introductionmentioning

confidence: 99%

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Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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Abstract:In this study, we investigated the ability of a magnetic wood biochar (WB)-based composite catalyst (Fe 3 O 4 -WB) to catalyze sodium persulfate (PS) for the remediation of estuary sediment contaminated with polycyclic aromatic hydrocarbons (PAHs). The effects of various critical parameters, including the catalyst dose and initial pH, were investigated. The degradation of the PAHs was found to be related to the number of rings in their structure. The results showed that Fe 3 O 4 -WB is an efficient catalyst for the removal of high-ring PAHs (HPAHs), with the highest degradation rates for the 6-, 5-, and 4-ringed PAHs being 90%, 84%, and 87%, respectively, for a PS concentration of 2 × 10 −5 M, catalyst concentration of 3.33 g/L, and pH of 3.0. That the reduction rate of the HPAHs was greater than that of the low-ring PAHs can be attributed to the strong affinity of the HPAHs for biochar derived from wood biomass. Overall, this study revealed that the WB-mediated electron transfer catalysis of the surface functional groups in a wide range of pH in the Fe 3 O 4 -WB/PS system and potentially application in the remediation of sediments contaminated with PAHs.

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Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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“…Zazycki et al [157] used pecan nutshell biochar as low-cost adsorbent for removing Reactive Red 141 from aqueous solutions with an uptake of up to 130 mg/g, which was comparable with results achieved by Netpradit et al [158], who used metal hydroxides. Jung et al [159] produced a magnetic iron-decorated biochar from the pyrolysis of marine macroalgae for the adsorption of Orange 7 from aqueous media with comparable performances to those of metal frameworks [160]. The iron tailoring enabled a higher adsorption performance along with an easier separation and recovery process in the post-adsorption stage when using a simple magnet.…”

Section: Organic Pollutants Removalmentioning

confidence: 99%

A Review of Non-Soil Biochar Applications

et al. 2020

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Biochar is the solid residue that is recovered after the thermal cracking of biomasses in an oxygen-free atmosphere. Biochar has been used for many years as a soil amendment and in general soil applications. Nonetheless, biochar is far more than a mere soil amendment. In this review, we report all the non-soil applications of biochar including environmental remediation, energy storage, composites, and catalyst production. We provide a general overview of the recent uses of biochar in material science, thus presenting this cheap and waste-derived material as a high value-added and carbonaceous source.

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“…Since then, the synthesis of magnetic adsorbents has drawn considerable attention, as indicated by the growing number of publications. Diverse effective adsorbents have been reported to incorporate magnetic particles, such as metal oxides [ 26 , 27 ], silica-based materials [ 28 , 29 , 30 , 31 , 32 ], carbon-based materials [ 33 , 34 , 35 ], graphene oxide [ 36 ], biopolymers, such as lignin [ 37 ], cellulose [ 38 ], chitosan [ 39 ], synthetic polymers [ 40 , 41 , 42 ], molecularly imprinted polymers [ 43 ], metal organic frameworks [ 44 ], and biowaste [ 45 , 46 ]. Magnetic adsorbents can be prepared using physical methods, such as mechanical agitation (stirring, vibration, milling, and ultrasonication) at room or elevated temperatures in some cases, along with the addition of adhesives.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Adsorbents for Wastewater Treatment: Advancements in Their Synthesis Methods

et al. 2022

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The remediation of water streams, polluted by various substances, is important for realizing a sustainable future. Magnetic adsorbents are promising materials for wastewater treatment. Although numerous techniques have been developed for the preparation of magnetic adsorbents, with effective adsorption performance, reviews that focus on the synthesis methods of magnetic adsorbents for wastewater treatment and their material structures have not been reported. In this review, advancements in the synthesis methods of magnetic adsorbents for the removal of substances from water streams has been comprehensively summarized and discussed. Generally, the synthesis methods are categorized into five groups, as follows: direct use of magnetic particles as adsorbents, attachment of pre-prepared adsorbents and pre-prepared magnetic particles, synthesis of magnetic particles on pre-prepared adsorbents, synthesis of adsorbents on preprepared magnetic particles, and co-synthesis of adsorbents and magnetic particles. The main improvements in the advanced methods involved making the conventional synthesis a less energy intensive, more efficient, and simpler process, while maintaining or increasing the adsorption performance. The key challenges, such as the enhancement of the adsorption performance of materials and the design of sophisticated material structures, are discussed as well.

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Facile synthesis of magnetic biochar/Fe3O4 nanocomposites using electro-magnetization technique and its application on the removal of acid orange 7 from aqueous media

Cited by 109 publications

References 17 publications

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

A Review of Non-Soil Biochar Applications

Magnetic Adsorbents for Wastewater Treatment: Advancements in Their Synthesis Methods

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