Adsorption of Methylene Blue and Phenol by Wood Waste Derived Activated Carbon

Liu, Mei Yi; Tsang, Daniel C.W.; Hu, Jing; Ng, Kelvin Tsun Wai; Liu, Tongzhou; Lo, Irene M.C.

doi:10.1061/(asce)0733-9372(2008)134:5(338)

Cited by 31 publications

(9 citation statements)

References 38 publications

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“…The occurrence of two wide dips around 3000 and 3660 cm −1 can be attributed to the presence of free and hydrogen-bonded O−H groups on the surface of the activated materials. 36 These results reveal that the casein precursor helps to introduce a large amount of oxygen functionalities on the surface of the MPC materials, which are helpful in achieving a high adsorption of CO 2 molecules. TGA/DSC Analysis.…”

Section: ■ Materials and Methodsmentioning

confidence: 83%

Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO₂ Adsorption Capacity at Both Low- and High-Pressure Regimes

Singh

Lakhi

Sathish

et al. 2019

ACS Appl. Nano Mater.

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We report on a simple approach for converting casein into oxygen-functionalized mesoporous carbons (MPCs) with extremely high surface areas and carbon contents (∼94%). The materials synthesized by KOH activation of a casein-based nonporous carbon precursor at a carbonization temperature of 800 °C displayed mixed micro- and mesoporosity, which can be easily controlled by simple adjustment of the amount of KOH. The optimized material MPC3, which was prepared with a KOH/carbon source ratio of 3, exhibited a highest specific surface area of 3617 m2 g–1, a pore volume of 2.16 cm3 g–1, and a pore diameter of 2.7–3.1 nm. Because of these excellent textural features, MPC3 achieved excellent CO2 uptake at 1 bar/0 °C (4.12 mmol g–1) and 30 bar/0 °C (39.1 mmol g–1), which are higher than those of mesoporous carbons and silica, activated carbon, carbon nitrides, and carbon nanotubes. The high performance is linked with the combination of excellent textural parameters and unique oxygen functionalities on the surface. It is also demonstrated that these materials are highly stable and can be used repeatedly without much loss of the adsorption capacity. Therefore, the presented materials can be good candidates for pre- and postcombustion CO2 capture.

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Section: ■ Materials and Methodsmentioning

confidence: 83%

Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO₂ Adsorption Capacity at Both Low- and High-Pressure Regimes

Singh

Lakhi

Sathish

et al. 2019

ACS Appl. Nano Mater.

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“…The SDBC had a particle size ( D 50 of 4.0–7.9 μm) that was comparable to most waste‐derived activated carbons, but a substantially smaller BET specific surface area ranging from 7.9 to 23.7 m 2 g −1 . This indicated the lack of physical or chemical activation processes (Tsang et al, 2007; Liu et al, 2008). The SEM images of the SDBC pyrolyzed at 400°C for 2 h (Fig.…”

Section: Resultsmentioning

confidence: 99%

Sludge-Derived Biochar for Arsenic(III) Immobilization: Effects of Solution Chemistry on Sorption Behavior

Zhang

Zheng

et al. 2015

J. Environ. Qual.

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Recycling sewage sludge by pyrolysis has attracted increasing attention for pollutant removal from wastewater and soils. This study scrutinized As(III) sorption behavior on sludge-derived biochar (SDBC) under different pyrolysis conditions and solution chemistry. The SDBC pyrolyzed at a higher temperature showed a lower As(III) sorption capacity and increasingly nonlinear isotherm due to loss of surface sites and deoxygenation-dehydrogenation. The Langmuir sorption capacity on SDBC (3.08-6.04 mg g) was comparable to other waste-derived sorbents, with the highest As(III) sorption on SDBC pyrolyzed at 400°C for 2 h. The As(III) sorption kinetics best fit with the pseudo-second-order equation, thus suggesting the significance of the availability of surface sites and initial concentration. Sorption of As(III) was faster than that of Cr(VI) but slower than that of Pb(II), which was attributed to their differences in molar volume (correlated to diffusion coefficients) and sorption mechanisms. The X-ray photoelectron spectra revealed an increase of oxide oxygen (O) with a decrease of sorbed water, indicative of ligand exchange with hydroxyl groups on SDBC surfaces. The As(III) sorption was not pH dependent in acidic-neutral range (pH < 8) due to the buffering capacity and surface characteristics of the SDBC; however, sorption was promoted by increasing pH in the alkaline range (pH > 8) because of As(III) speciation in solution. An increasing ionic strength (0.001-0.1 mol L) facilitated As(III) sorption, indicating the predominance of ligand exchange over electrostatic interactions, while high concentrations (0.1 mol L) of competing anions (fluoride, sulfate, carbonate, and phosphate) inhibited As(III) sorption. These results suggest that SDBC is applicable for As(III) immobilization in most environmentally relevant conditions.

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“…4a. The adsorption kinetic follows a pseudo-first-order model when the plot of ln (qe -qt) versus ti gives a straight line [19]. The pseudo-second-order equation [2] is expressed as: (4) where qt (mg g -1 ) is the amount of phosphate adsorbed at adsorption time, qe is the amount of phosphate adsorbed at equilibrium time (mg g -1 ), k2 is a rate constant of pseudo-secondorder model (min -1 ) and ti is the adsorption time (min).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Adsorption of phosphate from aqueous solutions using waste mussel shell

et al. 2018

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Excessive amount of phosphate released from wastewater can cause eutrophication to the receiving waters. Adsorption technique has been used to remove phosphate from aqueous solutions. The use of waste mussel shell (WMS) to remove phosphate from aqueous solutions and application of several kinetic and isotherm models to describe the adsorption of phosphate onto WMS were conducted in batch experiments. The phosphate adsorption by the WMS was examined with respect to solute concentration, contact time and adsorbent dose. The phosphate removal efficiencies obtained were 46.7, 57.6, 64.1, 70.8 and 75.2% at 144 h contact time for WMS dosage of 2, 4, 6, 8 and 10 g, respectively. Physical and chemical properties of WMS including surface physical morphology and elemental compositions were characterized. A comparison of kinetic models applied to the phosphate adsorption onto WMS was evaluated for the pseudo-first order and pseudo-second order model. The experimental data fitted very well with the pseudo-second order kinetic model (R2 > 0.984), which indicated the adsorption process was chemisorption. In the isotherm studies, the Langmuir and Freundlich isotherm models were applied. The results indicated that the use of Freundlich equation is well described with the phosphate adsorptions onto WMS (R2 = 0.968), suggesting the heterogeneity of the adsorbent surface. The experimental results suggested the use of WMS as an excellent adsorption material for phosphate removal from aqueous solutions, giving new insights into environmental engineering practices.

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Adsorption of Methylene Blue and Phenol by Wood Waste Derived Activated Carbon

Cited by 31 publications

References 38 publications

Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO₂ Adsorption Capacity at Both Low- and High-Pressure Regimes

Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO₂ Adsorption Capacity at Both Low- and High-Pressure Regimes

Sludge-Derived Biochar for Arsenic(III) Immobilization: Effects of Solution Chemistry on Sorption Behavior

Adsorption of phosphate from aqueous solutions using waste mussel shell

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Adsorption of Methylene Blue and Phenol by Wood Waste Derived Activated Carbon

Cited by 31 publications

References 38 publications

Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO2 Adsorption Capacity at Both Low- and High-Pressure Regimes

Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO2 Adsorption Capacity at Both Low- and High-Pressure Regimes

Sludge-Derived Biochar for Arsenic(III) Immobilization: Effects of Solution Chemistry on Sorption Behavior

Adsorption of phosphate from aqueous solutions using waste mussel shell

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Product

Resources

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Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO₂ Adsorption Capacity at Both Low- and High-Pressure Regimes

Oxygen-Functionalized Mesoporous Activated Carbons Derived from Casein and Their Superior CO₂ Adsorption Capacity at Both Low- and High-Pressure Regimes