Rice husk-based adsorbents for removing ammonia: Kinetics, thermodynamics and adsorption mechanism

Bai, Wenli; Qian, Miaomiao; Li, Quanxiang; Atkinson, Steve; Tang, Bin; Zhu, Yanchao; Wang, Jinfeng

doi:10.1016/j.jece.2021.105793

Cited by 32 publications

(12 citation statements)

References 65 publications

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“…At 0.1 surface coverage, the dispersive surface energy (g D s ) for the three ber types followed the order of wool (49.1 mJ m −2 ) > cotton (40.8 mJ m −2 ) > nylon (37.1 mJ m −2 ), indicating that wool ber showed the highest odor adsorption potential via physical interaction, which was followed by cotton and nylon, whereas the specic surface energy (g sp s ) for the three ber types followed the order of nylon (9.6 mJ m −2 ) > wool (7.9 mJ m −2 ) > cotton (5.9 mJ m −2 ), suggesting that nylon ber demonstrated the best adsorption potential via chemical interaction. 41 The dispersive surface energy was higher than the specic surface energy for all three ber types, revealing that the potential for physisorption was higher than that of the chemisorption for all three bers. Total surface energy (g T s ) is the combination of dispersive and specic surface energies, which represents the number of active sites per unit surface.…”

Section: Insight Into the Adsorption Mechanismmentioning

confidence: 86%

The adsorption kinetics and mechanism of odorous gases onto textile fibers

Bai

Liu

et al. 2023

RSC Sustain.

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Section: Insight Into the Adsorption Mechanismmentioning

confidence: 86%

The adsorption kinetics and mechanism of odorous gases onto textile fibers

Bai

Liu

et al. 2023

RSC Sustain.

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“…The adsorption of gas molecules by porous materials can be affected by the gas−pore-surface interaction energy, pore diameter, pore volume, pore specific surface area, pore morphology, and surface roughness. 34 In terms of the specific surface area, it was expected that the adsorption capacity of TEPS-WSNs (surface area of 630 m 2 g −1 ) for benzene was higher than those of OTES-WSNs and HDTMS-WSNs (surface areas of 517 and 599 m 2 g −1 , respectively). However, the experimental results differed from the expectation, suggesting that factors other than the specific surface area of the adsorbent contributed to the adsorption performance to a greater extent.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Surface-Modified Wrinkled Mesoporous Nanosilica as an Effective Adsorbent for Benzene, Toluene, Ethylbenzene, and Xylene in Indoor Air

Shim

Kim

Lee

et al. 2022

ACS Appl. Nano Mater.

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Surfactant-extracted spherical porous silica nanoparticles with wrinkled structures were synthesized, and their adsorption performance was altered by grafting three organosilanes: n-octyltriethoxysilane, hexadecyltrimethoxysilane, and triethoxyphenylsilane onto their surface. The surface-modified silica nanoparticles were used to capture frequently detected hazardous indoor air chemicals. The physical and chemical properties of the samples were characterized using thermogravimetric analysis, Fourier transform infrared spectroscopy, N 2 adsorption−desorption experiments, field-emission scanning electron microscopy, and high-resolution transmission electron microscopy. Although the organosilane surface modification did not significantly change the surface areas and pore structures of porous silica nanoparticles, the capacities of the surface-modified porous silica nanoparticles for capturing benzene, toluene, ethylbenzene, and xylene (BTEX) molecules from air were considerably higher than those of pristine porous silica nanoparticles. The dispersion forces between adsorbates and adsorbents were the primary factor that affected the absorption capacity of the surface-modified porous silica nanoparticles. Consequently, the BTEX capturing potential of surface-modified mesoporous silica featuring a long alkyl chain was high because of the relatively high dispersion force between adsorbates and the adsorbent.

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“…To increase the adsorption, Love and Park's research group studied ozone-treated activated carbon for increasing acid functional groups, such as carbonyl and ether groups [35,36]. Previous research determined that the adsorption process of ammonia onto activated carbon follows the pseudo-second order model [39]. The pseudo-second order kinetic model suggests that chemical adsorption is the dominant mechanism.…”

Section: Ammonia Adsorption Testmentioning

confidence: 99%

High Surface Area–Activated Carbon Production from Cow Manure Controlled by Heat Treatment Conditions

et al. 2022

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In this study, methods of adding value to cow manure were studied. Due to the properties of cow manure, activated carbon with a high surface area can only be produced by increasing the fixed carbon ratio and removing the ash content. Activated carbon was fabricated using five different treatments: (1) raw material–chemical activation, (2) raw material–hydrothermal carbonization–chemical activation, (3) raw material–hydrothermal carbonization–chemical activation–acid washing, (4) raw material–hydrothermal carbonization–heat treatment–chemical activation, and (5) raw material–hydrothermal carbonization–chemical activation–acid washing. The products then underwent proximate, elementary, and surface area analyses. In addition, changes in activated carbon properties depending on the heat treatment temperature (300, 500, 700 °C) and the applied chemical activator ratios (1:1–1:3) were examined. The results showed that the best heat treatment temperature was 300 °C, and the cow manure to chemical activator ratio was 1:2. The heat treatment stabilization process increases the fixed carbon ratio and the solid yield, and the acid wash process removes substances that restrain the increase in surface area. Therefore, activated carbon with a surface area of 1955 m2/g can be produced after the addition of heat treatment and an acid wash to the process. In addition, the adsorption properties of activated carbon with different heat treatment conditions were studied.

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Rice husk-based adsorbents for removing ammonia: Kinetics, thermodynamics and adsorption mechanism

Cited by 32 publications

References 65 publications

The adsorption kinetics and mechanism of odorous gases onto textile fibers

The adsorption kinetics and mechanism of odorous gases onto textile fibers

Surface-Modified Wrinkled Mesoporous Nanosilica as an Effective Adsorbent for Benzene, Toluene, Ethylbenzene, and Xylene in Indoor Air

High Surface Area–Activated Carbon Production from Cow Manure Controlled by Heat Treatment Conditions

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