Coconut-based activated carbon fibers for efficient adsorption of various organic dyes

Zhang, Ling; Tu, Ling-yu; Liang, Yan; Chen, Qi; Li, Ze-Sheng; Li, Chunhai; Wang, Zhi‐Hui; Wen, Li

doi:10.1039/c8ra08990f

Cited by 211 publications

(103 citation statements)

References 33 publications

(31 reference statements)

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“…The acid treatment removed the ashes and clear the pores, leading to the increase of surface area and pore volume increase simultaneously (Table 1). (Figure 3) [25,26]. When compared with S-and H-AC (Figure 3 a,b), the peaks of H-AC rarely changed, even when they were thermally treated.…”

Section: Resultsmentioning

confidence: 94%

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Regeneration of Activated Carbons Spent by Waste Water Treatment Using KOH Chemical Activation

Park¹,

Lee²,

Hong³

et al. 2019

Applied Sciences

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In this study, spent activated carbons (ACs) were collected from a waste water treatment plant (WWTP) in Incheon, South Korea, and regenerated by heat treatment and KOH chemical activation. The specific surface area of spent AC was 680 m2/g, and increased up to 710 m2/g through heat treatment. When the spent AC was activated by the chemical agent potassium hydroxide (KOH), the surface area increased to 1380 m2/g. The chemically activated ACs were also washed with acetic acid (CH3COOH) to compare the effect of ash removal during KOH activation. The low temperature N2 adsorption was utilized to measure the specific surface areas and pore size distributions of regenerated ACs by heat treatment and chemical activation. The functional groups and adsorbed materials on ACs were also analyzed by X-ray photoelectron spectroscopy and X-ray fluorescence. The generated ash was confirmed by proximate analysis and elementary analysis. The regenerated ACs were tested for toluene adsorption, and their capacities were compared with commercial ACs. The toluene adsorption capacity of regenerated ACs was higher than commercial ACs. Therefore, it is a research to create high value-added products using the waste.

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Section: Resultsmentioning

confidence: 94%

“…Textural properties of the S-AC, H-AC, C-AC-W, and C-AC-A. (Figure 3) [25,26]. When compared with S-and H-AC (Figure 3 a,b), the peaks of H-AC rarely changed, even when they were thermally treated.…”

Section: S-ac H-ac C-ac-w C-ac-mentioning

confidence: 99%

Regeneration of Activated Carbons Spent by Waste Water Treatment Using KOH Chemical Activation

Park¹,

Lee²,

Hong³

et al. 2019

Applied Sciences

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“…Therefore, attention has been paid to the production of scalable high surface area nanoporous carbon materials, particularly in a cost effective way from agricultural by-products or wastes. Wide varieties of carbonaceous precursor materials including pitch [21], pistachio shell [22], rice husks [23,24], coconut shell [25], eucalyptus wood [26], firewood [27,28], oil-palm shell [29,30], babassu [31], corncob [32], bamboo [33,34], etc. have been used to prepare activated carbons.…”

Section: Introductionmentioning

confidence: 99%

Rice Husk-Derived High Surface Area Nanoporous Carbon Materials with Excellent Iodine and Methylene Blue Adsorption Properties

Shrestha

Thapa

Shrestha

et al. 2019

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Iodine and methylene blue adsorption properties of the high surface area nanoporous carbon materials derived from agro-waste and rice husk is reported. Rice husk was pre-carbonized at 300 °C in air followed by leaching out the silica nanoparticles by extraction with sodium hydroxide solution. The silica-free rice husk char was mixed with chemical activating agents sodium hydroxide (NaOH), zinc chloride (ZnCl2), and potassium hydroxide (KOH) separately at a mixing ratio of 1:1 (wt%) and carbonized at 900 °C under a constant flow of nitrogen. The prepared carbon materials were characterized by scanning electron microscopy (SEM), Fourier transformed-infrared spectroscopy (FT-IR), powder X-ray diffraction (pXRD), and Raman scattering. Due to the presence of bimodal micro- and mesopore structures, KOH activated samples showed high specific surface area ca. 2342 m2/g and large pore volume ca. 2.94 cm3/g. Oxygenated surface functional groups (hydroxyl, carbonyl, and carboxyl) were commonly observed in all of the samples and were essentially non-crystalline porous particle size of different sizes (<200 μm). Adsorption study revealed that KOH activated samples could be excellent material for the iodine and methylene blue adsorption from aqueous phase. Iodine and methylene blue number were ca. 1726 mg/g and 608 mg/g, respectively. The observed excellent iodine and methylene blue adsorption properties can be attributed to the well-developed micro- and mesopore structure in the carbon material. This study demonstrates that the agricultural waste, rice husk, and derived nanoporous carbon materials would be excellent adsorbent materials in water purifications.

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“…The broad peak at 3422-3445 cm -1 is belonged to O-H stretching vibration which is assigned to the hydroxyl group and phenol hydroxyl groups 28,39) . A peak at 2883-2884 cm -1 represents the C-H stretching 40,41) . The C=O stretching peak at 1712 cm -1 refers to the presence of aldehydes, carboxylic acids and ketone structure of cellulose and hemicellulose 42,43) .…”

Section: Resultsmentioning

confidence: 99%

Activated Carbon from Bagasse and its Application for Water Vapor Adsorption

Ridassepri¹,

Rahmawati²,

Heliani³

et al. 2020

Evergreen

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This research study carbon activation prepared from Bagasse, a waste of sugar factory. The activation was conducted in water vapor at 600°C (C600) and 700 °C (C700). The activated carbon was then tested for water vapor adsorption. The produced-carbon has diffraction peak at 2θ of 25°, with surface area are 584.940 m²/g and 533.301 m²/g for C600 and C700, respectively. C600 also shows higher water vapor adsorption than C700, the value is 0.223 g/g. It shows a potency of Bagasse waste as raw material for adsorbent powder.

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Coconut-based activated carbon fibers for efficient adsorption of various organic dyes

Abstract: Activated carbon fibers with high micropore volume and large specific surface area were prepared from abundant and low-cost coconut fibers, which show excellent adsorption performances towards various dyes.

Cited by 211 publications

References 33 publications

Regeneration of Activated Carbons Spent by Waste Water Treatment Using KOH Chemical Activation

Regeneration of Activated Carbons Spent by Waste Water Treatment Using KOH Chemical Activation

Rice Husk-Derived High Surface Area Nanoporous Carbon Materials with Excellent Iodine and Methylene Blue Adsorption Properties

Activated Carbon from Bagasse and its Application for Water Vapor Adsorption

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