Effects of powder activated carbon particle size on adsorption capacity and mechanical properties of the semi activated carbon fiber

Saeidi, Navid; Lotfollahi, Mohammad Nader

doi:10.1007/s12221-015-0543-6

Cited by 17 publications

(7 citation statements)

References 29 publications

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“…Particle sizes in the order of 10 2 µm generally agree with previous reports of SCG properties, but the SCG particles reported here are somewhat smaller than in earlier reports [30,31], likely due to the grounding step we performed. We note that particle sizes of the same order of magnitude are frequently reported for biobased carbon materials used as adsorbents (see, for example, [32]). However, carbon materials typically have large specific surface areas (SSA) due to the developed internal pore structure.…”

Section: Resultssupporting

confidence: 67%

Spent Coffee Grounds as an Adsorbent for Malathion and Chlorpyrifos—Kinetics, Thermodynamics, and Eco-Neurotoxicity

Milanković

Tasić

Pejčić

et al. 2023

Foods

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Coffee is one of the most popular beverages, with around 10.5 million tons manufactured annually. The same amount of spent coffee grounds (SCGs) might harm the environment if disposed of carelessly. On the other hand, pesticide contamination in food and biowaste is a rising problem. Because pesticides are hazardous and can cause serious health consequences, it is critical to understand how they interact with food biowaste materials. However, it is also a question if biowaste can be used to remediate rising pesticide residues in the environment. This study investigated the interactions of SCGs with the organophosphate pesticides malathion (MLT) and chlorpyrifos (CHP) and addressed the possibility of using SCGs as adsorbents for the removal of these pesticides from water and fruit extracts. The kinetics of MLT and CHP adsorption on SCGs fits well with the pseudo-first-order kinetic model. The Langmuir isotherm model best describes the adsorption process, giving the maximal adsorption capacity for MLT as 7.16 mg g−1 and 7.00 mg g−1 for CHP. Based on the thermodynamic analysis, it can be deduced that MLT adsorption on SCGs is exothermic, while CHP adsorption is an endothermic process. The adsorption efficiency of MLT and CHP using SCGs in a complicated matrix of fruit extracts remained constant. The neurotoxicity results showed that no more toxic products were formed during adsorption, indicating that SCGs are a safe-to-use adsorbent for pesticide removal in water and fruit extracts.

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Section: Resultssupporting

confidence: 67%

Spent Coffee Grounds as an Adsorbent for Malathion and Chlorpyrifos—Kinetics, Thermodynamics, and Eco-Neurotoxicity

Milanković

Tasić

Pejčić

et al. 2023

Foods

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“…The field of material science has long understood the importance that particle size can impose on the mechanical properties of materials, notably, in the areas of activated carbons ( Saeidi and Lotfollahi, 2015 ), magnetorheology ( De Vicente et al, 2011 ) and composite materials ( Lim et al, 2010 ). As the field of MOFs and COFs begins to explore a range of particle sizes, from the creation of monoliths ( Tian et al, 2015 ; Widmer et al, 2018 ) to nanoparticles ( Osterrieth and Fairen-Jimenez, 2021 ), we are beginning to see the effect this can have on mechanical properties of the materials.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Perspectives on the Influence of Crystal Size and Morphology on the Properties of Porous Framework Materials

et al. 2021

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Miniaturization is a key aspect of materials science. Owing to the increase in quality experimental and computational tools available to researchers, it has become clear that the crystal size and morphology of porous framework materials, including metal-organic frameworks and covalent organic frameworks, play a vital role in defining the physicochemical behaviour of these materials. However, given the multiscale and multidisciplinary challenges associated with establishing how crystal size and morphology affect the structure and behaviour of a material–from local to global structural modifications and from static to dynamic effects–a comprehensive mechanistic understanding of size and morphology effects is missing. Herein, we provide our perspective on the current state-of-the-art of this topic, drawn from various complementary disciplines. From a fundamental point of view, we discuss how controlling the crystal size and morphology can alter the mechanical and adsorption properties of porous framework materials and how this can impact phase stability. Special attention is also given to the quest to develop new computational tools capable of modelling these multiscale effects. From a more applied point of view, given the recent progress in this research field, we highlight the importance of crystal size and morphology control in drug delivery. Moreover, we provide an outlook on how to advance each discussed field by size and morphology control, which would open new design opportunities for functional porous framework materials.

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“…Activated carbon fibers (ACFs) are applied efficiently in various industries, particularly for removing pollutants from water and air (Saeidi and Lotfollahi 2015). Their applications have been widely extended, not only as adsorbents but also as electronic materials because of their high surface area and abundant functional surface groups (Avelar et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Activated Carbon Fibers from Liquefied Wood by ZnCl2 Activation

Liu¹,

Huang²,

Zhao³

2016

BioResources

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In this study, activated carbon fibers (ACFs) were prepared from liquefied wood by chemical activation with ZnCl2, with a particular focus on the effects of temperature and ZnCl2: liquefied wood-based fiber (LWF) ratio on yield, porous texture, and surface chemistry. The characterization and properties of these ACFs were investigated by nitrogen adsorption/desorption, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). When using a 6:1 impregnation ratio, the specific surface area (SBET) of the resultant ACFs was as high as 1423 m 2 /g. The effect of an increase in impregnation ratio on the porosity of ACFs was stronger than that of an increase in the activation temperature. However, the former had a weaker impact on the surface chemistry and structure. It was also found that the yields of ACFs obtained by ZnCl2 activation were higher than those obtained by physical activation. Besides, the prepared ACFs presented higher adsorption than other raw materials in the adsorption test, indicating that ACFs prepared from LWF by ZnCl2 activation could be used as an adsorbent for the adsorption of medium size organic compounds.

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Effects of powder activated carbon particle size on adsorption capacity and mechanical properties of the semi activated carbon fiber

Cited by 17 publications

References 29 publications

Spent Coffee Grounds as an Adsorbent for Malathion and Chlorpyrifos—Kinetics, Thermodynamics, and Eco-Neurotoxicity

Spent Coffee Grounds as an Adsorbent for Malathion and Chlorpyrifos—Kinetics, Thermodynamics, and Eco-Neurotoxicity

Perspectives on the Influence of Crystal Size and Morphology on the Properties of Porous Framework Materials

Preparation and Characterization of Activated Carbon Fibers from Liquefied Wood by ZnCl2 Activation

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