Adsorption of synthetic dyed wastewater using activated carbon from rice husk

Kheddo, Anokhaa; Rhyman, Lydia; Elzagheid, Mohamed I.; Jeetah, Pratima; Ramasami, Ponnadurai

doi:10.1007/s42452-020-03922-5

Cited by 29 publications

(9 citation statements)

References 31 publications

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“…A growing interest in adsorption processes for vigorously removing organic dyes has been observed recently, mainly due to their versatility, effectiveness, easy operating and low cost (Alguacil et al 2021). Different adsorbents generally used for dye removal are activated carbon (Kheddo et al 2020), zeolite (Hammood et al 2021), biochar (Sutar et al 2022), clay (Kausar et al 2018), and metal-organic framework (Uddin et al 2021). Various studies have proven that biochar has a great potential for organic dye removal in aquatic systems.…”

Section: Introductionmentioning

confidence: 99%

Preparing Shrimp Shell-Derived Chitosan with Rice Husk-Derived Biochar for Efficient Safranin O Removal from Aqueous Solution

Phương¹,

Thảo²,

Loc³

2023

J. Ecol. Eng.

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In this study, the shrimp shell-derived chitosan was coated onto rice husk-derived biochar to form chitosan/biochar bio-composite beads. The physicochemical properties of biochar (BC) and chitosan/biochar beads (CS@BC) were characterized by BET, SEM-EDX, FTIR, and pH pzc analyses, which were then tested for their capacity to remove Safranin O (SO) from water. In kinetics, the pseudo-second-order model was found to well represent experimental data, indicating the adsorption was mainly a chemical process. The intra-particle diffusion model was not the sole rate-limiting step, because the results did not pass through the origin. In isotherms, both the Langmuir and Freundlich models described well the equilibrium adsorption data. The CS@BC adsorbent showed adsorption capacity at 77.94 mg/g for SO, which is higher than BC adsorbent with 62.25 mg/g (experimental conditions: pH ~ 7.0, dosage = 0.2 g, contact time = 240 min, and temperature = 298 K). The findings revealed that the biochar-loaded chitosan can improve the adsorption capacity of SO. It is predicted that the enhancement in the functional groups (i.e., -NH 2 and -OH groups) of CS@BC could contribute to the electrostatic interactions and the complexation between SO and CS@BC, thereby enhancing the Safranin O adsorption from water.

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Section: Introductionmentioning

confidence: 99%

Preparing Shrimp Shell-Derived Chitosan with Rice Husk-Derived Biochar for Efficient Safranin O Removal from Aqueous Solution

Phương¹,

Thảo²,

Loc³

2023

J. Ecol. Eng.

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“…Materials that can be used as dye absorbents include activated carbon, zeolite, clay, agricultural solid waste, chitosan, metal oxides, polymers, carbon nanotubes, and graphene (Sheeja et al 2021;Hammood et al 2021;Martinez et al 2019;El-Bery et al2022;Ibrahim et al 2020;Elfeky et al 2020;Mok et al 2020;Kar et al 2020;Poton et al 2022). Activated carbon is one of the most efficient and low cost materials to remove colored materials from polluted water, perhaps due to the high surface area associated with its porous structure (Kheddo et al 2020). Specific surface area and surface activation are usually required to obtain better catalytic and surface properties.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of ZnO Coated Porous Activated Carbon Prepared from Pontederia crassipe Leaves for the Adsorptive Removal of Toxic Organic Dyes

Allah¹,

Alshamsi

2023

Preprint

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In the current study, new zinc oxide/activated carbon (ZnO/AC) nanocomposites were successfully synthesized, using Pontederia crassipes leaves as a carbon source for synthesis of activated carbon. In addition, the extract of Pontederia crassipes leaves was obtained as reducing and capping agent in the synthesis of ZnO. The synthesized materials were investigated using various characterization techniques including XRD, FTIR, FE-SEM, EDX, BET-BJH, TEM and Raman, which proved the successful synthesis. The synthesized samples were applied as new nanoadsorbents for the uptake of Malachite Green (MG) and Congo Red (CR) dyes from aquatic media. The thermodynamic, adsorption isotherm and kinetic studies were conducted adopting the batch experiment method. The results showed that the optimum efficiency of removal of both dyes was achieved with ZnO/AC (10%) nanocomposite, which was found to be 98.87% for CR dye and 99.23% for MG dye. The thermodynamic analysis exhibited that adsorption process for both dyes is spontaneous. In addition, the results exhibited that the removal of CR onto ZnO/AC(10%) was exothermic, while that of MG was an endothermic. In the case of adsorption isotherms, the Freundlich model showed the best fit for both dyes with a high correlation coefficient (R2) of 0.99, suggesting heterogeneous surface of the synthesized nanoparticles. The kinetic analysis indicated that both dyes followed a pseudo-second-order kinetic model.

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“…Among them, adsorption method makes the dye molecules in the solution phase transfer to the surface of adsorbent, which is favored because of its high efficiency, low cost, and easy operation. Commonly used adsorbents include activated carbon, lignin, zeolite, metal organic framework, biomass residue, nano materials [13][14][15][16], etc. In recent years, with the rapid development of nanotechnology, the application of nano materials in the field of environment is also common.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials

Wang

Zhang

et al. 2022

Sustainability

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In this study, flower-like MoS2 nanomaterials were synthesized by hydrothermal method with excess thiourea. The adsorption performance of MoS2 adsorbent for methylene blue (MB) in azo dye wastewater was studied. The morphology, crystal phase, and microstructure of nano MoS2 samples were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. The effects of adsorption isotherm, kinetics, different hydrothermal time, and pH on the adsorption experiment were studied. The results showed that the MoS2 adsorbent with a hydrothermal time of 1 h had good adsorption properties for MB. The adsorption data accord with the Langmuir isotherm model, and the maximum adsorption capacity of MoS2 adsorbent is 200 mg/g, and the adsorption kinetics agrees well with the pseudo two-level model. The removal rate of MB is not significantly affected by the pH values. The large pH range can still maintain the removal rate above 93.47%, and the regeneration and recovery properties of MoS2 were also explored. Finally, the adsorption mechanism of MoS2 on MB is discussed.

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Adsorption of synthetic dyed wastewater using activated carbon from rice husk

Cited by 29 publications

References 31 publications

Preparing Shrimp Shell-Derived Chitosan with Rice Husk-Derived Biochar for Efficient Safranin O Removal from Aqueous Solution

Preparing Shrimp Shell-Derived Chitosan with Rice Husk-Derived Biochar for Efficient Safranin O Removal from Aqueous Solution

Green Synthesis of ZnO Coated Porous Activated Carbon Prepared from Pontederia crassipe Leaves for the Adsorptive Removal of Toxic Organic Dyes

Adsorption of Methylene Blue on Azo Dye Wastewater by Molybdenum Disulfide Nanomaterials

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