A novel approach to developing a reusable marine macro-algae adsorbent with chitosan and ferric oxide for simultaneous efficient heavy metal removal and easy magnetic separation

Son, Eun-Bi; Poo, Kyung-Min; Mohamed, Hend Omar; Choi, Yun-Jeong; Cho, Wan-Cheol; Chae, Kyu-Jung

doi:10.1016/j.biortech.2018.03.077

Cited by 97 publications

(22 citation statements)

References 35 publications

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“…In contrast with other carbon materials (e.g., activated carbon and carbon black), biochar usually possesses abundant surface functional groups, as Figure 8 depicts. These surface functional groups are very helpful for biochar functionalization [15,81]. For example, the loading of metal precursors into biochar, a critical step for the synthesis of biochar-supported metal catalysts, can be facilitated by surface functional groups clinching metal cations [9,13,14].…”

Section: Surface Functional Groupsmentioning

confidence: 99%

Preparation and Application of Biochar-Based Catalysts for Biofuel Production

Cheng

2018

Catalysts

217

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Firstly, this paper reviews two main methods for biochar synthesis, namely conventional pyrolysis and hydrothermal carbonization (HTC). The related processes are described, and the influences of biomass nature and reaction conditions, especially temperature, are discussed. Compared to pyrolysis, HTC has advantages for processing high-moisture biomass and producing spherical biochar particles. Secondly, typical features of biochar in comparison with other carbonaceous materials are summarized. They refer to the presence of inorganics, surface functional groups, and local crystalline structures made up of highly conjugated aromatic sheets. Thirdly, various strategies for biochar modification are illustrated. They include activation, surface functionalization, in situ heteroatom doping, and the formation of composites with other materials. An appropriate modification is necessary for biochar used as a catalyst. Fourthly, the applications of biochar-based catalysts in three important processes of biofuel production are reviewed. Sulfonated biochar shows good catalytic performance for biomass hydrolysis and biodiesel production. Biodiesel production can also be catalyzed by biochar-derived or -supported solid-alkali catalysts. Biochar alone and biochar-supported metals are potential catalysts for tar reduction during or after biomass gasification. Lastly, the merits of biochar-based catalysts are summarized. Biochar-based catalysts have great developmental prospects. Future work needs to focus on the study of mechanism and process design.

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Section: Surface Functional Groupsmentioning

confidence: 99%

Preparation and Application of Biochar-Based Catalysts for Biofuel Production

Cheng

2018

Catalysts

217

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“…Use of the biochar-based magnetic materials to remove the heavy metal pollutants from the aqueous solutions not only exhibits high removal performance but also enables the spent adsorbents to be easily disposed using a low strength magnetic separation device [ 14 ]. In the recent literature, studies concerning the magnetic biochars used for controlling the heavy metal pollution, a variety of magnetic components were loaded/coated on the biochars derived from a wide range of biomass sources, thus, improving the structure and functionality [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. The most commonly utilized magnetic substances are magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ).…”

Section: Introductionmentioning

confidence: 99%

Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

Zhao

Cai

et al. 2020

Molecules

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A series of the magnetic CuFe2O4-loaded corncob biochar (CuFe2O4@CCBC) materials was obtained by combining the two-step impregnation of the corncob biochar with the pyrolysis of oxalate. CuFe2O4@CCBC and the pristine corncob biochar (CCBC) were characterized using XRD, SEM, VSM, BET, as well as pHZPC measurements. The results revealed that CuFe2O4 had a face-centered cubic crystalline phase and was homogeneously coated on the surface of CCBC. The as-prepared CuFe2O4@CCBC(5%) demonstrated a specific surface area of 74.98 m2·g−1, saturation magnetization of 5.75 emu·g−1 and pHZPC of 7.0. The adsorption dynamics and thermodynamic behavior of Pb(II) on CuFe2O4@CCBC and CCBC were investigated. The findings indicated that the pseudo-second kinetic and Langmuir equations suitably fitted the Pb(II) adsorption by CuFe2O4@CCBC or CCBC. At 30 °C and pH = 5.0, CuFe2O4@CCBC(5%) displayed an excellent performance in terms of the process rate and adsorption capacity towards Pb(II), for which the theoretical rate constant (k2) and maximum adsorption capacity (qm) were 7.68 × 10−3 g·mg−1··min−1 and 132.10 mg·g−1 separately, which were obviously higher than those of CCBC (4.38 × 10−3 g·mg−1·min−1 and 15.66 mg·g−1). The thermodynamic analyses exhibited that the adsorption reaction of the materials was endothermic and entropy-driven. The XPS and FTIR results revealed that the removal mechanism could be mainly attributed to the replacement of Pb2+ for H+ in Fe/Cu–OH and –COOH to form the inner surface complexes. Overall, the magnetic CuFe2O4-loaded biochar presents a high potential for use as an eco-friendly adsorbent to eliminate the heavy metals from the wastewater streams.

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“…That is because Cd pollution was the most serious threat in China according to the national general survey of soil contamination (2013). Moreover, most of the literature was published in the journal of "Bioresource Technology" (Chen et al 2018;Ifthikar et al 2018;Jung et al 2018;Shi et al 2018;Son et al 2018;Trakal et al 2016;Yoon et al 2017;Zuo et al 2016). The modification methods were more diverse than those in 2011-2015.…”

Section: Heavy Metals' Immobilizationmentioning

confidence: 99%

“…The research about biochar remediation for heavy metals/metalloids contamination is well documented (Beesley and Marmiroli 2011; Cao et al 2009;Chen et al 2016;Lu et al 2012b;Qian et al 2017;Trakal et al 2014). With deeper understanding, the structures and surface properties of biochar have been modified with diverse methods, which deserves an increased attention globally (Chen et al 2011;Creamer et al 2018;Deng et al 2017Deng et al , 2018aLing et al 2017;Son et al 2018;Yao et al 2013;Zhang et al 2013a).…”

Section: Introductionmentioning

confidence: 99%

A scientometric review of biochar research in the past 20 years (1998–2018)

Ata-Ul-Karim

Singh

et al. 2019

Biochar

183

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Biochar is the carbon-rich product obtained from the thermochemical conversion of biomass under oxygen-limited conditions. Biochar has attained extensive attention due to its agronomical and environmental benefits in agro-ecosystems. This work adopts the scientometric analysis method to assess the development trends of biochar research based on the literature data retrieved from the Web of Science over the period of 1998-2018. By analysing the basic characteristics of 6934 publications, we found that the number of publications grew rapidly since 2010. Based on a keyword analysis, it is concluded that scholars have had a fundamental recognition of biochar and preliminarily found that biochar application had agronomic and environmental benefits during the period of 1998-2010. The clustering results of keywords in documents published during 2011-2015 showed that the main research hotspots were "biochar production", "biochar and global climate change", "soil quality and plant growth", "organic pollutants removal", and "heavy metals immobilization". While in 2016-2018, beside these five main research hotspots, "biochar and composting" topic had also received greater attention, indicating that biochar utilization in organic solid waste composting is the current research hotspot. Moreover, updated reactors (e.g., microwave reactor, fixed-bed reactor, screw-feeding reactor, bubbling fluidized bed reactor, etc.) or technologies (e.g., solar pyrolysis, Thermo-Catalytic Reforming process, liquefaction technology, etc.) applied for efficient energy production and modified biochar for environmental remediation have been extensively studied recently. The findings may help the new researchers to seize the research frontier in the biochar field.

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A novel approach to developing a reusable marine macro-algae adsorbent with chitosan and ferric oxide for simultaneous efficient heavy metal removal and easy magnetic separation

Cited by 97 publications

References 35 publications

Preparation and Application of Biochar-Based Catalysts for Biofuel Production

Preparation and Application of Biochar-Based Catalysts for Biofuel Production

Study on the Adsorption of CuFe2O4-Loaded Corncob Biochar for Pb(II)

A scientometric review of biochar research in the past 20 years (1998–2018)

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