High surface area mesoporous activated carbon produced from Iraqi reed via pyrolysis assisted H3PO4 activation: Box-Behnken design for surfactant removal

Ahmed, Thabit; Abdulhameed, Ahmed Saud; Ibrahim, Shariff Che; ALOthman, Zeid A.; Wilson, Lee D.; Jawad, Ali H.

doi:10.1016/j.diamond.2023.109756

Cited by 11 publications

(4 citation statements)

References 38 publications

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“…The pore structures of RAR‐AC are not obvious, and there are fine particles attached to the surface of RAR‐AC in Figure 4a. Figure 4b shows the carbon skeleton aggregation on M‐RAR‐AC, presenting a completely different morphology comparison to RAR‐AC 33 . It is possible to conclude that the activation process results in the formation of a polydisperse system for M‐RAR‐AC.…”

Section: Resultsmentioning

confidence: 96%

“…Figure 4b shows the carbon skeleton aggregation on M-RAR-AC, presenting a completely different morphology comparison to RAR-AC. 33 It is possible to conclude that the activation process results in the formation of a polydisperse system for M-RAR-AC. Furthermore, the activation with phosphoric acid led to a much more extensive destruction of AC particles structure, resulting in a more homogeneous particle size distribution of the M-RAR-AC (as shown in Figure 3b).…”

Section: Scanning Electron Microscopementioning

confidence: 94%

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High efficiency removal of ibuprofen in water using activated carbon derived from Radix Angelica Dahurica residue

Zhang,

et al. 2023

Env Prog and Sustain Energy

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The exploitation and utilization of Traditional Chinese medicine have annually produced 30 million tons of waste residues including Radix Angelica Dahurica residue (RAR), which raised environmental concerns. Meantime, the non‐steroidal anti‐inflammatory drug of ibuprofen (IBP) is an emerging contaminant in the aquatic environment, annually producing up to 9000 tons in China. After extracting the active substance, RAR is prepared as activated carbon (AC) for the purification of IBP wastewater. Two kinds AC modified without (RAR‐AC) and with phosphoric acid (M‐RAR‐AC) were characterized by FT‐IR, TG, BET and SEM. The phosphoric acid activation contributed to the high BET surface area (564.9914 m2 g−1) and large total pore volume (0.4894 cm3 g−1). M‐RAR‐AC showed 7.7 folds (15 min) and 2.7 folds (30 min) higher extent of IBP removal compared to commercial activated carbon (C‐AC). The enhancement of IBP removal with M‐RAR‐AC was investigated further by varying initial pollutant concentration, absorbent dosage, temperature, pH and rotating speed. Especially, temperature nearly has no effect on IBP removal by M‐RAR‐AC. Isotherm and kinetic studies suggested IBP was adsorbed on the heterogeneous surface in multilayer form and chemisorption played the dominant role in IBP removal. IBP removal of 93.3 ± 0.1% and 64.2 ± 2.8% was achieved for first and fifth cycle, respectively. The IBP removal on M‐RAR‐AC may be accomplished by a variety of interactions such as electrostatic attraction, pore‐filling, hydrogen bonding, and π‐π interaction. These findings provide new insights into the utilization of RAR for preparing AC and highlight the potential applications for treating industrial wastewater.

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Section: Resultsmentioning

confidence: 96%

Section: Scanning Electron Microscopementioning

confidence: 94%

High efficiency removal of ibuprofen in water using activated carbon derived from Radix Angelica Dahurica residue

Zhang,

et al. 2023

Env Prog and Sustain Energy

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“…One suitable AC precursor is cherry stones (CSs, hereafter) [3][4][5], from which AC has been developed as usual by the two stages of physical and chemical activation methods. As far as the chemical method is concerned, ZnCl 2 [6,7], KOH [8,9] and H 3 PO 4 [10,11] have been used as activating agents for such a purpose. Of the aforesaid activating agents, H 3 PO 4 has been the most investigated and preferred, due to environmental and safety issues.…”

Section: Introductionmentioning

confidence: 99%

Surface Chemistry of Cherry Stone-Derived Activated Carbon Prepared by H3PO4 Activation

González-Domínguez,

Fernández-González,

Alexandre-Franco

et al. 2024

Processes

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The preparation of activated carbons (ACs) from cherry stones and chemical activation with H3PO4 can be controlled by the experimental variables during the impregnation step in order to obtain a tailored porous structure of the as-prepared ACs. This control not only extends to the ACs’ texture and porosity development, but also to the chemical nature of their surface. The spectroscopic and elemental characterization of different series of ACs is presented in this study. The spectroscopic band features and assignments strongly depend on the H3PO4 concentration and/or the semi-carbonization treatments applied to the feedstock before impregnation, which ultimately influence different characteristics such as the AC hydrophilicity. Different surface chemistries arise from the different tailored impregnation solutions, showing a practical outcome for future applications of the as-prepared ACs.

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“…Studies on dyes adsorption by ACs derived from pine sawdust are limited [17][18][19][20], and there are no studies with wood dyes. As mentioned, due to the disposal of untreated industrial wastewater and the disadvantages of using commercial activated carbon which limit its applicability, the valorization of biomass wastes to produce activated carbons for the removal of organic pollutants is of extreme importance [21,22]. Thus, the objective of this work is to produce one biochar and three ACs from pine sawdust biomass and assess their adsorption capacity to eliminate blue, red, and black acid wood dyes.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of anionic wood dyes on KOH-activated carbons from Pinus radiata sawdust

Pimentel,

Castro-Agra,

Freire

et al. 2024

Biomass Conv. Bioref.

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Chemically activated carbons synthesized from pine sawdust were applied efficiently for the elimination of wood dyes from aqueous solutions. Different proportions (1:2 and 1:4) of activating agent (KOH) and activation temperatures (600 and 850 °C) were used. Carbon surface morphology was characterized. The effect of pH (2–12), initial adsorbate concentration (5–500 mg L−1), and carbon dosage (0.1–0.5 g L−1) on dye adsorption were studied in batch mode. Langmuir model described well the adsorption equilibrium. The maximum found adsorption capacities were 1221.58, 1673.03, and 240.38 mg g−1 for blue and red at 500 mg L−1 and black at 100 mg L−1, respectively, using activated carbon at 850 °C and 1:4 (ACPS-4–850); at 25 °C, adsorbent dose 0.4 g L−1 for blue and black and 0.3 g L−1 for red dye and without change the pH for blue and red and at pH = 2 for black dye. The pseudo-second-order model explained the kinetics of adsorption except for the black dye at 100 mg L−1 using ACPS-4–850 for which it was the pseudo-first-order model. Desorption studies performed with ACPS-4–850 revealed that the adsorption was irreversible by chemical regeneration, whereas for the black dye, regeneration was efficient using H2O2 as desorbing agent.

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High surface area mesoporous activated carbon produced from Iraqi reed via pyrolysis assisted H3PO4 activation: Box-Behnken design for surfactant removal

Cited by 11 publications

References 38 publications

High efficiency removal of ibuprofen in water using activated carbon derived from Radix Angelica Dahurica residue

High efficiency removal of ibuprofen in water using activated carbon derived from Radix Angelica Dahurica residue

Surface Chemistry of Cherry Stone-Derived Activated Carbon Prepared by H3PO4 Activation

Adsorption of anionic wood dyes on KOH-activated carbons from Pinus radiata sawdust

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