Modifying coconut shell activated carbon for improved purification of benzene from volatile organic waste gas

Deng, Zhihua; Deng, Qing; Wang, Linqi; Xiang, Ping; Lin, Jing; Murugadoss, Vignesh; Song, Gang

doi:10.1007/s42114-021-00273-6

Cited by 50 publications

(7 citation statements)

References 14 publications

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“…After H3PO4 activation and nickel doping, the absorption peaks of PC and PCNi3 were shifted and some new peaks appeared at 3426, 1566, 1094, and 1040 cm −1 , which could have been an effect of -OH groups, aromatic C=C structural vibration, phenolic hydroxyl O-H deformation, C-O stretching vibration, O-H distortion of alcohol or ether groups, C-O elongating vibrations, etc. [26,27]. The shifts in the peaks representing the character and appearance of functional groups on the top layer imply that the enhancement of oxygenated reactive groups in PC and PCNi3 provided abundant surface active sites for the adsorption of Cr (VI) from water and thus enhanced the potential for binding between biochar and Cr (VI) [28].…”

Section: The Physicochemical Properties Of Adsorbentsmentioning

confidence: 99%

Enhancing Cr (VI) Adsorption of Chestnut Shell Biochar through H3PO4 Activation and Nickel Doping

Hu,

Zhang,

Chen

et al. 2024

Molecules

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A high-efficiency nickel-doped porous biochar (PCNi3) has been successfully synthesized from chestnut shell waste via a two-step chemical activation treatment with H3PO4. The influences of microstructure, surface morphology, elemental composition, surface functional groups, specific surface area, porosity, pore-size distribution, and chemical properties of the surface state on the removal of Cr (VI) from water were thoroughly investigated by using XRD, FESEM, FTIR, Raman, BET, and XPS testing methods, N2 adsorption, and XPS testing techniques respectively. The results indicate that the treatment of H3PO4 activation and nickel doping can effectively improve microstructure characteristics, thus promoting Cr (VI) adsorption capacity. The effects of initial solution pH, solution concentration, time, and temperature on remediation are revealed. The Cr (VI) uptake experiments imply that the adsorption curves of PCNi3 fit well with the Freundlich model, the pseudo-second-order kinetic model, and the Elovich model. The adsorption process of PCNi3 can be regarded as a spontaneous endothermic reaction limited by diffusion among particles and porosity. The adsorption mechanisms of PCNi3 are ion exchange, complexation, electrostatic adsorption, and coprecipitation with the assistance of surface active sites, porosity, Ni0 particles, and Ni7P3. With these advantages, PCNi3 reveals an extraordinary Cr (VI) removal capacity and a strong ability to reduce Cr (VI) to Cr (III).

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Section: The Physicochemical Properties Of Adsorbentsmentioning

confidence: 99%

Enhancing Cr (VI) Adsorption of Chestnut Shell Biochar through H3PO4 Activation and Nickel Doping

Hu,

Zhang,

Chen

et al. 2024

Molecules

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“…In recent years, metal oxide-carbon (MO-C) materials, due to their intriguing physical, chemical, electrical, and optical properties as well as their ability to combine multiple advantages and performance characteristics, have become one of the most important research topics. 1,2 Carbon materials with a large specific surface area and easy access to various pore sizes have attracted intense research, [3][4][5][6][7][8][9][10][11] although some deficiencies such as their low dispersibility in water make them undesirable for some applications. Metal oxide materials, also in spite of their versatile properties, possess some weak properties, such as low electrical conductivities, which restricts them in many applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization study of γ-Fe₂O₃/carbon composite nanofibers: electrospinning of composite fibers using PVP and iron nitrate as precursors

Havigh

Chenari

2023

Phys. Chem. Chem. Phys.

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“…Activated carbon produced from ACRs has been proven to be sustainable, environmentally friendly, economical, and efficient in liquid-phase adsorption applications; industrial and wastewater treatment [18], [21], [31], heavy metals adsorption [32], [33], water purification [31], [34]. AC from ABPs have great success in the sequestration of hazardous substances from the environment; benzene [35], phenol [23], [36], dyes, and crude oil components [22]. Recent studies tend to advocate the modification of ACRs to improve their adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Quality Minimization of Agricultural Drainage Water for Irrigation Water Reuse Using Coconut Shell Activated Carbon

Adejumobi

Olaoye²,

Adebayo³

et al. 2022

ACRI

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Nutrients and organic pollutants draining from agricultural fields are the leading sources of surface water quality impairment. Activated carbon (AC) produced from agricultural crop residues has great success in the sequestration of hazardous substances from wastewaters. This study evaluates the potential of coconut shell activated carbon for agricultural drainage water quality minimization; pH adjustment, and excess nitrate and sulphate adsorption. Agriculture drainage water samples were collected and analyzed for Electrical conductivity, Total Dissolved Solids, Chloride, Sodium, Sulphate, Bicarbonate, Nitrate – Nitrogen, and pH. Coconut shells were sourced locally and carbonized at 500°C (± 5°C) for one hour in a muffle furnace. The char produced was ground, sieved, and activated with potassium hydroxide (KOH). The porosity and morphological structures of the AC were examined using a Scanning Electron Microscope. The effect of contact time (30, 60, 90, and 120 min), temperature (20 and 40°C), and adsorbent dosage (1, 1.5, 2, and 2.5 g) were examined using batch studies. The analysis of the drainage water shows the water is highly alkaline and contains sulphate and nitrate above FAO benchmark values. The SEM analysis indicates that the stability and mesoporosity of the carbonaceous material were enhanced by KOH activation. The pH value of the treated water decreased from 9.94 (highly alkaline) to 7.92. The use of 1 g (10 g/l) of coconut shell AC has the highest amount of nitrate and sulphate per unit quantity of AC (4.1 and 2.98 mg/g respectively). The adsorption process peaked at 30 mins contact time with 99.8% and 98.8% nitrate and sulphate removal efficiency, respectively. The process is temperature dependent; nitrate adsorption performs slightly better at 40°C; sulphate adsorption at 20°C. More research effort is needed to ascertain the performance and applicability under continuous flow conditions.

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Modifying coconut shell activated carbon for improved purification of benzene from volatile organic waste gas

Cited by 50 publications

References 14 publications

Enhancing Cr (VI) Adsorption of Chestnut Shell Biochar through H3PO4 Activation and Nickel Doping

Enhancing Cr (VI) Adsorption of Chestnut Shell Biochar through H3PO4 Activation and Nickel Doping

Preparation and characterization study of γ-Fe₂O₃/carbon composite nanofibers: electrospinning of composite fibers using PVP and iron nitrate as precursors

Quality Minimization of Agricultural Drainage Water for Irrigation Water Reuse Using Coconut Shell Activated Carbon

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Modifying coconut shell activated carbon for improved purification of benzene from volatile organic waste gas

Cited by 50 publications

References 14 publications

Enhancing Cr (VI) Adsorption of Chestnut Shell Biochar through H3PO4 Activation and Nickel Doping

Enhancing Cr (VI) Adsorption of Chestnut Shell Biochar through H3PO4 Activation and Nickel Doping

Preparation and characterization study of γ-Fe2O3/carbon composite nanofibers: electrospinning of composite fibers using PVP and iron nitrate as precursors

Quality Minimization of Agricultural Drainage Water for Irrigation Water Reuse Using Coconut Shell Activated Carbon

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Preparation and characterization study of γ-Fe₂O₃/carbon composite nanofibers: electrospinning of composite fibers using PVP and iron nitrate as precursors