One-step preparation of environment-oriented magnetic coal-based activated carbon with high adsorption and magnetic separation performance

Liu, Yin; Zhu, Zejie; Cheng, Qian; Ren, Hengdong; Wang, Sheng; Zhao, Yan; Li, Jianjun; Zhu, Jinbo; Kong, Ling Bing

doi:10.1016/j.jmmm.2020.167517

Cited by 22 publications

(10 citation statements)

References 43 publications

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“…1(B)), in 2 θ above 10°, presents a broad amorphous halo at 25° (168) and 35° (104), characteristic of carbonaceous matrices. For CCACM the halos become more defined, as can be seen for peaks close to 25° (553) and 35° (455), due to the crystalline structure found in Fe 3 O 4 , which also promotes the graphitization of amorphous carbon 29,44‐46 …”

Section: Resultsmentioning

confidence: 93%

“…A change in the textural properties of the CCACM support can also be observed after the metallization process, where there was a reduction of about 33.04% of the surface area when compared to the original matrix. This behavior can be attributed to the insertion of metallic particles into the pores of the material during the metallization process, indicating that some micropores and mesopores were blocked, as can be seen by the reduction in the surface area of the matrix 46 …”

Section: Resultsmentioning

confidence: 97%

“…For CCACM the halos become more defined, as can be seen for peaks close to 25°(553) and 35°(455), due to the crystalline structure found in Fe 3 O 4 , which also promotes the graphitization of amorphous carbon. 29,[44][45][46] The point of zero charge (pH PZC ) is one of the properties that must be evaluated in adsorbents, as it is related to the surface charge and is a function of the activation method used. The pH PZC can be defined as the pH value in which there is no net charge on the solid surface; 47 i.e., at solution pH above the pH PZC value, the surface of the support is positively charged and thus adsorption of anions is favored, whereas adsorption of cations is preferred at a solution pH below the pH PZC value.…”

Section: Resultsmentioning

confidence: 99%

“…This behavior can be attributed to the insertion of metallic particles into the pores of the material during the metallization process, indicating that some micropores and mesopores were blocked, as can be seen by the reduction in the surface area of the matrix. 46 SEM and EDX of supports SEM was used to evaluate the structure of the CCAC and CCACM samples (Fig. 3(A,B)).…”

Section: Measurement Of Porosity and Bet Surface Areamentioning

confidence: 99%

See 3 more Smart Citations

Incorporation of metallic particles in activated carbon used in lipase immobilization for production of isoamyl acetate

Oliveira

Santos

Brito

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND: Biotechnology has revolutionized the use of enzymes for application in industrial processes. The present work evaluated the effect of functionalizing activated carbon with metallic nanoparticles obtained from corn cob residue on lipase immobilization. The aim was to improve the enzymatic activity of the immobilized enzyme and subsequent application of derivatives in the synthesis of isoamyl acetate ester (banana flavor). RESULTS:The activated carbon (CCAC) had a mesoporous structure and specific surface area of 1135 m 2 g −1 , characteristic of supports from precursor material with a high cellulose content, which was reduced in metalized carbon (CCACM) due to the insertion of metallic particles (760 m 2 g −1 ). CCACM showed a slightly higher lipase absorptive capacity than CCAC (280.72 ± 0.27 mg g −1 and 276.46 ± 0.03 mg g −1 , respectively). Furthermore, for derivatives the optimal reaction medium conditions were pH 7.0 and 30 °C, confirming the advantage associated with lipase immobilization, obtaining activity values of 84.0 ± 2.12 U, 72.3 ± 1.7 U and 31.4 ± 1.9 U, for lipase immobilized on CCACM, CCAC and native form, respectively. The derivatives showed potential application in the synthesis of isoamyl acetate ester, with conversions above 90% and stability during five cycles of use. CONCLUSION:The activated carbon metallization process showed an increase in lipase immobilization efficiency and proved to be a promising support, since there was an increase in its enzymatic activity and the derivatives obtained showed potential application in aroma synthesis, reaching conversion above 90%.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Measurement Of Porosity and Bet Surface Areamentioning

confidence: 99%

See 2 more Smart Citations

Incorporation of metallic particles in activated carbon used in lipase immobilization for production of isoamyl acetate

Oliveira

Santos

Brito

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…Magnetic nanoadsorbents are emerging as significantly effective functional materials with exceptional micropollutant sequestration capabilities and fast adsorption kinetics at the laboratory scale (Abdel Maksoud et al 2020 ; D’Cruz et al 2020 ; Hu et al 2020 ; Mittal et al 2020 ; Ahmad et al 2020a ; Wang et al 2020b , d ; Jafari et al 2020 ; Keykhaee et al 2020 ; Icten and Ozer 2021 ; Xin et al 2021 ). Magnetic nanoadsorbents are generally characterized with high specific surface areas (e.g., 1188 m 2 g –1 for magnetic coal-based activated carbon (Liu et al 2021 )), high pore volumes (Gupta et al 2017 ; Yeap et al 2017 ; Masunga et al 2019 ; Li et al 2020 ; Azam et al 2020 ; Pan et al 2021 ), robust structures (Lingamdinne et al 2019a), and extensively interconnected porous networks (Tan et al 2020 ; Fan et al 2021 ) which collectively promote ultrahigh adsorption capacities for micropollutants.…”

Section: Magnetic Nanoadsorbentsmentioning

confidence: 99%

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Mudhoo

Sillanpää

2021

Environ Chem Lett

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Pure water will become a golden resource in the context of the rising pollution, climate change and the recycling economy, calling for advanced purification methods such as the use of nanostructured adsorbents. However, coming up with an ideal nanoadsorbent for micropollutant removal is a real challenge because nanoadsorbents, which demonstrate very good performances at laboratory scale, do not necessarily have suitable properties in in full-scale water purification and wastewater treatment systems. Here, magnetic nanoadsorbents appear promising because they can be easily separated from the slurry phase into a denser sludge phase by applying a magnetic field. Yet, there are only few examples of large-scale use of magnetic adsorbents for water purification and wastewater treatment. Here, we review magnetic nanoadsorbents for the removal of micropollutants, and we explain the integration of magnetic separation in the existing treatment plants. We found that the use of magnetic nanoadsorbents is an effective option in water treatment, but lacks maturity in full-scale water treatment facilities. The concentrations of magnetic nanoadsorbents in final effluents can be controlled by using magnetic separation, thus minimizing the ecotoxicicological impact. Academia and the water industry should better collaborate to integrate magnetic separation in full-scale water purification and wastewater treatment plants.

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Polyamide film containing a molecularly imprinted polymer prepared on a paper surface by interfacial polymerization and its selective adsorption of benzalkonium chloride

Ichiura,

Kawahara

2023

J of Applied Polymer Sci

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In this study, paper coated with a polyamide film containing a molecularly imprinted polymer (MIP) of benzalkonium chloride (BKC) is prepared. Its BKC adsorption ability and selectivity for BKC adsorption are investigated. The MIP is prepared by agitating an ethylenediamine solution containing an azo initiator, BKC as a template material, and methacrylic acid (MAA) as the functional monomer. First, filter paper soaked in this mixture is impregnated with a cyclohexane solution of terephthaloyl chloride and a BKC–MAA–MIP‐containing polyamide film is prepared on the surface of the paper. Paper containing BKC–MAA–MIP adsorbs BKC. The paper with the highest BKC removal efficiency is prepared under the following conditions: 4 mL MAA functional monomer, 2.5 w/v% ethylenediamine, and 10 min MIP synthesis time. The paper with BKC–MAA–MIP selectively adsorbs BKC from a solution containing BKC, tetracycline hydrochloride, and caffeine. Thus, a polyamide film containing BKC‐MAA‐MIP formed on paper can effectively and selectively remove BKC from aqueous environments.

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One-step preparation of environment-oriented magnetic coal-based activated carbon with high adsorption and magnetic separation performance

Cited by 22 publications

References 43 publications

Incorporation of metallic particles in activated carbon used in lipase immobilization for production of isoamyl acetate

Incorporation of metallic particles in activated carbon used in lipase immobilization for production of isoamyl acetate

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Polyamide film containing a molecularly imprinted polymer prepared on a paper surface by interfacial polymerization and its selective adsorption of benzalkonium chloride

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