Comparative study on characterization of activated carbons prepared by microwave and conventional heating methods and application in removal of oxytetracycline (OTC)

Huang, Lihui; Sun, Yuanyuan; Wang, Weiliang; Yue, Qinyan; Yang, Tao

doi:10.1016/j.cej.2011.05.041

Cited by 202 publications

(89 citation statements)

References 41 publications

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“…CAAC-1 had a prominent peak at 27.49° with the interlayer spacing of 0.3245 nm. All the interlayer spacing data were lesser than those of graphite, 0.335 nm, illustrating non-graphite carbons [34]. In conclusion, Fig.…”

Section: Xrd Analysismentioning

confidence: 51%

Comparative study on microstructure and surface properties of keratin- and lignocellulosic-based activated carbons

Kong

Yue

Zhao

et al. 2015

Fuel Processing Technology

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The paper probed the preparation of activated carbon by potassium silicate (K 2 SiO 3 ) activation from keratin waste (cowhair waste, CW) and lignocellulosic materials (Cyperus alternifolius, CA) and the comparisons of physicochemical properties of the resulting carbons. These impregnation conditions were as follows: one impregnated at room temperature for 12 h then dipped at high temperature for 30 min; the other was only impregnated at room temperature for 12 h, producing four activated carbons CWAC-1, CWAC-2, CAAC-1, and CAAC-2. The influence of activation time, K 2 SiO 3 /precursor weight ratio, and the pre-process on properties of activated carbons was discussed. The CWAC-1 produced at 700 °C with the K 2 SiO 3 /precursor weight ratio of 2:1 possessed the BrunauerEmmet-Teller (BET) surface area of 1965 m 2 /g and total pore volume of 1.345 cm 3 /g, while CAAC-1 prepared at the same conditions attained the BET surface area of 1710 m 2 /g and total pore volume of 0.949 cm 3 /g. The surface area and total pore volume of CAAC increased with the impregnation ratio. Moreover, CWAC-1, CWAC-2, CAAC-1, and CAAC-2 exhibited high portion of micropores, illustrating the role of K 2 SiO 3 . The analysis with a Fourier transform infrared spectrometer indicates that CWAC has more functional groups than CAAC, as well as CWAC-1 and CWAC-2 which possess similar functional groups.

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Section: Xrd Analysismentioning

confidence: 51%

Comparative study on microstructure and surface properties of keratin- and lignocellulosic-based activated carbons

Kong

Yue

Zhao

et al. 2015

Fuel Processing Technology

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“…The essential characteristics of the Langmuir isotherm can be expressed by means of a dimension- Table 2 were found to be between 0 and 1, which indicated that the adsorption process was quite favorable (10). The conclusion of the favorable adsorption process also could be obtained on the basis of Freundlich constant 1/n values, which were less than 1 at all temperatures (25).…”

Section: Gtf Adsorption Isothermsmentioning

confidence: 79%

“…An obviously more adsorption could be seen as the temperature decreased from 318 K to 288 K, indicating that the adsorption was exothermic and favored at lower temperatures. The adsorption isotherms are significant for predicting the maximum adsorption capacity and describing the surface properties and affinity of the adsorbent (10). In this study, three widely used isotherm models: Langmuir (22), Freundlich (23), and Tempkin (24) models were selected to analyze the equilibrium data for the adsorption of GTF onto g-BN.…”

Section: Gtf Adsorption Isothermsmentioning

confidence: 99%

“…And adsorption has been considered to be an attractive and effective technology for removal of these organic pollutants. Recently, a great deal of adsorbents has been investigated and shown good potential, for example, graphene oxide (8)(9)(10), carbon nanotubes (11)(12)(13), activated carbon (14)(15)(16), mesoporous nanocomposite (17), porous resins (12), montmorillonite (18), bentonite (19), and kaolinite (20). Table 1 lists some of these adsorbents for removal of common antibiotics pollutants in water.…”

Section: Introductionmentioning

confidence: 99%

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Development of novel graphene-like layered hexagonal boron nitride for adsorptive removal of antibiotic gatifloxacin from aqueous solution

Chao

Zhu

Chen

et al. 2014

Green Chemistry Letters and Reviews

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(2014) Development of novel graphene-like layered hexagonal boron nitride for adsorptive removal of antibiotic gatifloxacin from aqueous solution, Green Chemistry Letters and Reviews, 7:4, 330-336, DOI: 10.1080/17518253.2014 Graphene-like layered hexagonal boron nitride (g-BN) was prepared and characterized. The performance of using g-BN as an adsorbent for removal of fluoroquinolone antibiotic gatifloxacin (GTF) from aqueous solution was evaluated. g-BN showed an excellent adsorption capability with notable GTF adsorption ratio of more than 90%. Data of equilibrium adsorption of GTF onto g-BN at different temperatures were represented by Langmuir, Freundlich and Tempkin isotherm models, and Langmuir exhibited the best fitting with the maximum adsorption capacity of 88.5 mg·g −1 at 288 K. GTF adsorption was insignificantly affected by solution pH. Competitive role of Na + and Ca 2+ in the solution inhibited the adsorption of GTF and decreased the adsorption capacity a bit. The adsorption process was spontaneous and exothermic. The adsorption was probably governed by π-π interaction between GTF and g-BN, and electrostatic interaction may also exist in the adsorption process.

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“…The yield of AC by microwave activation was lower in comparison with that achieved by the traditional thermal method (Huang et al 2011) because the samples reached a higher temperature rapidly in minutes and the aggressive activation caused by the microwave radiation was intense. The volatiles and tar were released very quickly from the reaction system, which resulted in mass loss of the raw materials and reduced the production yield (Huang et al 2011).…”

Section: Effect Of Raw Materials and Original Particle Sizementioning

confidence: 90%

Simultaneous Multifunctional Sorption of PFOS and Cr(VI) on Activated Carbon Prepared by One-Step Microwave Activation

Zhu

Zhou

Zhang

et al. 2015

Water Air Soil Pollut

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Multifunctional sorbents, activated carbons (AC), were prepared by one-step microwave activation utilizing peanut shells and sunflower seed husks. The influence of the original particle size of raw materials on the yield and specific surface area of AC was studied, which reached 33.5 % and 1133.27 m 2 /g, respectively. The r epet itive and compet itive uptakes of perfluorooctane sulfonate (PFOS) and chromium were applied to investigate the sorption properties of AC. The sorption mechanisms were demonstrated using sulfur Kedge X-ray absorption near edge structure analysis (XANES). In the repetitive experiment, AC made from peanut shells (AC P05 ) still retained 70 % removal efficiency of PFOS after the fourth sorption because sorbed PFOS might form a new organic phase that supplied effective sites for the hydrophobic partition of PFOS. However, the removal efficiency of Cr(VI) decreased dramatically from 60 to 11 % after the fourth uptake because electrostatic attraction was its only removal pathway. In the binary solutes system, AC P05 possessed perfect sorption performance for both PFOS and Cr(VI), which were 885 and 192 mg/g, respectively. In the multivariate solutes system, the XANES spectra indicated that the thiol functional group existed in the resulting AC and a metal chelate was formed between thiol and Zn

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Comparative study on characterization of activated carbons prepared by microwave and conventional heating methods and application in removal of oxytetracycline (OTC)

Cited by 202 publications

References 41 publications

Comparative study on microstructure and surface properties of keratin- and lignocellulosic-based activated carbons

Comparative study on microstructure and surface properties of keratin- and lignocellulosic-based activated carbons

Development of novel graphene-like layered hexagonal boron nitride for adsorptive removal of antibiotic gatifloxacin from aqueous solution

Simultaneous Multifunctional Sorption of PFOS and Cr(VI) on Activated Carbon Prepared by One-Step Microwave Activation

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