Mercury removal mechanism of AC prepared by one-step activation with ZnCl2

Hong, Dongyang; Zhou, Jinsong; Hu, Changxing; Zhou, Qixing; Mao, Juezhen; Qin, Qianwen

doi:10.1016/j.fuel.2018.07.103

Cited by 98 publications

(32 citation statements)

References 44 publications

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“…The vibration peaks at 2965 cm -1 and 2927 cm -1 corresponded to the C-H bonds from alkyl groups. The band from 1580 cm -1 to 1664 cm -1 can be attributed to the C=C vibration of an aromatic ring (Hong et al, 2019). The signal intensity of C=C groups, for LZC was clearly enhanced, indicating increased aromatization and stability.…”

Section: Ft-ir Analysismentioning

confidence: 98%

Performance of sesame straw cellulose, hemicellulose, and lignin biochars as adsorbents in removing benzo(a)pyrene from edible oil

et al. 2022

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The safety problems related to the occurrence of benzo(a)pyrene in edible oil have been a major threat to human health, and now significant attention has been to remove benzo(a)pyrene. So in this work, cellulose, hemicellulose, and lignin biochars were prepared, and then were used to remove benzo(a)pyrene from contaminated oil. Based on the nitrogen adsorption/desorption isotherms and the scanning election micrographs, the modified biochars had a huge specific surface area of 983.50-1915.55 m 2 /g and a well-developed porous structure. The modified biochars showed higher removal rate for benzo(a)pyrene than unmodified biochars. The highest adsorption (95.79%) of benzo(a)pyrene was achieved using the modified lignin biochar, which was therefore selected for evaluation of adsorptive capacity. The ability of the modified lignin biochar to adsorb benzo(a)pyrene was consistent with the pseudo-second order kinetic equation indicating mainly chemisorption, and it fit the Freundlich isotherm (R 2 > 0.999), thereby revealing the occurrence of multilayer adsorption. The effect of π-π conjugation interaction and pore-filling together promoted the high adsorption performance of the modified lignin biochar. This work demonstrates that the modified lignin biochar could be a promising adsorbent for the removal of benzo(a)pyrene from edible oils.

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Section: Ft-ir Analysismentioning

confidence: 98%

Performance of sesame straw cellulose, hemicellulose, and lignin biochars as adsorbents in removing benzo(a)pyrene from edible oil

et al. 2022

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“…According to the related literature, several common activators, [28][29][30][31][32][33][34][35][36][37][38] namely KOH, MgCl 2 , NaOH, and ZnCl 2 , are selected to carbonize PMS at a temperature of 550 C and quality ratio (PMS/activator) of 1 : 1 for 120 min. The iodine adsorption capacity (q t ) of the prepared composites is shown in Fig.…”

Section: Effect Of Various Activators On Structure Of Psi-c Composite and Its Iodine Capturementioning

confidence: 99%

Rapid iodine capture from radioactive wastewater by green and low-cost biomass waste derived porous silicon–carbon composite

Han

et al. 2021

RSC Adv.

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“…FromTable 1, the micropore volume increased from 0.27 to 0.29 cm 3 g −1 and the surface area increased from 426 to 513 m 2 /g. It was attributed to the crosslinking and polycondensation reactions between ZnCl 2 and C. 24 Furthermore, the appearance of peak (0.57 nm) indicated that ZnCl 2 also could widen the micropore width. It agreed with previous study.…”

Section: Influence Of Preparation Conditions For Pore Structure Andmentioning

confidence: 99%

Influence of surface characteristics on carbon disulfide catalytic hydrolysis over modified lake sediment biochar and research on deactivated mechanism

Song

Sun

et al. 2019

Surface & Interface Analysis

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A series of lake sediment biochar (LSB) catalysts modified by metal oxides and basic functional groups were utilized for removal of carbon disulfide (CS2) in yellow phosphorus tail gas. The influences of preparation and modification conditions for surface characteristics of Fe‐KOH/LSB on removal of CS2 were investigated. Surface area and pore structure analyses indicated that preparation processes were aimed to increase the micropore structure of LSB. Diffuse reflection using transform of Fourier infrared radiation results showed that Fe had high hydrolysis activity for CS2 and low oxidation activity for H2S. Thermogravimetric/differential thermal analysis results indicated that low calcination temperature was not conducive to the generation of Fe2O3 and high calcination temperature led to the oxidation of LSB. CO2 temperature programmed desorption results stated that high alkalinity site strength could improve the catalytic hydrolysis performance. High KOH content could enhance alkalinity site strength but led to the block of pore. These modification factors mainly controlled the catalytic hydrolysis ability of Fe‐KOH/LSB. X‐ray photoelectron spectroscopy results claimed that the deactivation of Fe‐KOH/LSB was attributed to the generation of S and sulfate, and the consumption of active component. In the deactivation process, S and sulfate generated and covered the activity sites, and Fe2O3 was converted into FeSO4 or Fe2(SO4)3, which led to the deactivation.

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Mercury removal mechanism of AC prepared by one-step activation with ZnCl2

Cited by 98 publications

References 44 publications

Performance of sesame straw cellulose, hemicellulose, and lignin biochars as adsorbents in removing benzo(a)pyrene from edible oil

Performance of sesame straw cellulose, hemicellulose, and lignin biochars as adsorbents in removing benzo(a)pyrene from edible oil

Rapid iodine capture from radioactive wastewater by green and low-cost biomass waste derived porous silicon–carbon composite

Influence of surface characteristics on carbon disulfide catalytic hydrolysis over modified lake sediment biochar and research on deactivated mechanism

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