A comprehensive new study on the removal of Pb (II) from aqueous solution by şırnak coal-derived char

Batur, Ebru; Baytar, Orhan; Kutluay, Sinan; Horoz, Sabit; Şahi̇n, Ömer

doi:10.1080/09593330.2020.1811397

Cited by 26 publications

(5 citation statements)

References 41 publications

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“…The surface area of the pores with a radius greater than 1 nm is determined by the iodine number. The iodine number is considered to be a basic parameter used to characterize activated carbon performance [6]. The method used by the American test and material community was used in determining the iodine number.…”

Section: Characterization Of Activated Carbonmentioning

confidence: 99%

“…The purpose of activation is to improve the specific surface area or pore volume of activated carbon by opening new pores and enhancing existing pores. Apart from that, the activation can change or adjust the surface chemical structure of activated carbon with certain unique properties [6][7]. Activation is more important than carbonization in terms of the properties of activated carbon.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of activated carbon in the presence of hydrochar from chickpea stalk and its characterization

Genli¹,

Şahin²,

Baytar³

et al. 2021

JOR

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In this study, hydrochar was obtained from chickpea stalk by hydrothermal method. Then, activated carbon was synthesized by chemical activation method using ZnCl2 activator in the presence of this hydrochar. The effects of parameters such as impragnation rate (hydrochar/ZnCl2), impragnation rate, activation temperature and activation time on activated carbon synthesis were investigated. The iodine number of the obtained activated carbon was determined and its characterization was performed by SEM, BET, FTIR measurements. It was determined that the highest iodine number of synthesized activated carbon was 734 mg/g under conditions of impragnation time (24 hour), impragnation rate (1/2), activation temperature (400 oC), and activation time (45 minutes). The BET surface area of the activated carbon with the highest iodine number was determined as 572 m2 /g. The methylene blue number of synthesized activated carbon and hydrochar were found as 105 mg/g and 45 mg/g, respectively.

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Section: Characterization Of Activated Carbonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of activated carbon in the presence of hydrochar from chickpea stalk and its characterization

Genli¹,

Şahin²,

Baytar³

et al. 2021

JOR

View full text Add to dashboard Cite

show abstract

“…Activated carbon has been utilized in various chemical processes such as water purification (Şahin et al 2016 ), biogas purification (Santos-Clotas et al 2019 ), carbon dioxide (CO 2 ) capture (Wawrzyńczak et al 2019 ), biodiesel production (Lu et al 2019 ), methane reforming (Tan et al 2019 ), catalyst support material (Baytar 2018 ), and VOC adsorption (Batur & Kutluay 2022 , Baytar et al 2020 ; Kutluay et al 2019a ) due to its porous structure and high surface area. Activated carbon can be obtained from wood (Bashkova & Bandosz 2009 ), coal (Batur et al 2021 ), polymer residues (Wei et al 2012 ), and agricultural waste (Genli et al 2022 ). Currently, there is a growing trend towards the production of activated carbon from biomass and agricultural waste, which are cheap and abundant raw materials (Gong et al 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Enhanced benzene vapor adsorption through microwave-assisted fabrication of activated carbon from peanut shells using ZnCl2 as an activating agent

Kutluay,

Şahin,

Baytar

2024

Environ Sci Pollut Res

Self Cite

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Herein, microwave-assisted activated carbon (MW-AC) was fabricated from peanut shells using a ZnCl2 activator and utilized for the first time to eliminate benzene vapor as a volatile organic compound (VOC). During the MW-AC production process, which involved two steps—microwave treatment and muffle furnace heating—we investigated the effects of various factors and achieved the highest iodine number of 1250 mg/g. This was achieved under optimal operating conditions, which included a 100% impregnation ratio, CO2 as the gas in the microwave environment, a microwave power set at 500 W, a microwave duration of 10 min, an activation temperature of 500 °C and an activation time of 45 min. The structural and morphological properties of the optimized MW-AC were assessed through SEM, FTIR, and BET analysis. The dynamic adsorption process of benzene on the optimized MW-AC adsorbent, which has a significant BET surface area of 1204.90 m2/g, was designed using the Box-Behnken approach within the response surface methodology. Under optimal experimental conditions, including a contact duration of 80 min, an inlet concentration of 18 ppm, and a temperature of 26 °C, the maximum adsorption capacity reached was 568.34 mg/g. The experimental data are better described by the pseudo-second-order kinetic model, while it is concluded that the equilibrium data are better described by the Langmuir isotherm model. MW-AC exhibited a reuse efficiency of 86.54% for benzene vapor after five consecutive recycling processes. The motivation of the study highlights the high adsorption capacity and superior reuse efficiency of MW-AC adsorbent with high BET surface area against benzene pollutant. According to our results, the developed MW-AC presents itself as a promising adsorbent candidate for the treatment of VOCs in various industrial applications.

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“…The asphalt molecules, especially the light components, are fixed in the network structure through the formation of reticular structure, thereby reducing the emission of asphalt VOCs [ 8 ]. The second one is adsorbents, which are regarded as one of the mainstream techniques due to their low energy consumption, facile operation of adsorption processes, and low operation cost [ 9 , 10 ]. Many researchers have explored the nanoparticle [ 11 , 12 ], activated carbon [ 13 , 14 ], and metal organic framework [ 15 ] as adsorbents for the adsorption application of benzene and its homologs (representative components in asphalt VOCs) and evaluated the kinetic model for the whole adsorption process.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Effect and Adsorption Mechanism of High Content Zeolite Ceramsite on Asphalt VOCs

2022

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In order to meet the requirements of industrial-scale fixed beds and develop an excellent adsorbent for asphalt VOCs. Zeolite ceramsite containing binder was prepared and successfully applied to the inhibition of asphalt VOCs. The results showed that prepared zeolite ceramsite possessed a high degree of crystallinity, and its main crystal phase is zeolite. The micropores with a pore size of 0.88 nm dominated the pore size distribution of the material. The adsorption experiment of asphalt VOCs showed a lower VOCs adsorption effect of 8.72% at a small dosage of 5%, while at a large dosage of 50%, the adsorption effect of VOCs exceeded 45%. This might be caused by the quite small external specific surface area, which occupied only 8.3% of the total specific surface area, and the low intraparticle diffusion coefficient due to the micropores. Meanwhile, the kinetics diameters of most aromatic hydrocarbons, which were comparable to the pore size of micropores, and the increase in the intraparticle diffusion resistance of aliphatic hydrocarbon molecules were the important factors in obtaining high adsorption of aromatic hydrocarbons in asphalt VOCs. Furthermore, the results indicated that the particulate adsorbent with a microporous structure should be mixed into the asphalt as a fine aggregate rather than an asphalt modifier for better asphalt VOCs adsorption effect.

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A comprehensive new study on the removal of Pb (II) from aqueous solution by şırnak coal-derived char

Cited by 26 publications

References 41 publications

Synthesis of activated carbon in the presence of hydrochar from chickpea stalk and its characterization

Synthesis of activated carbon in the presence of hydrochar from chickpea stalk and its characterization

Enhanced benzene vapor adsorption through microwave-assisted fabrication of activated carbon from peanut shells using ZnCl2 as an activating agent

Adsorption Effect and Adsorption Mechanism of High Content Zeolite Ceramsite on Asphalt VOCs

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