Hydrothermal and pyrolytic conversion of sunflower seed husk into novel porous biochar for efficient adsorption of tetracycline

Nguyen, Thanh-Binh; Nguyen, Thi-Kim-Tuyen; Chen, Wei‐Hsin; Chen, Chiu-Wen; Bui, Xuan‐Thanh; Patel, Anil Kumar; Dong, Cheng–Di

doi:10.1016/j.biortech.2023.128711

Cited by 46 publications

(17 citation statements)

References 38 publications

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“…Therefore, in order to save catalyst consumption, the catalyst amount of 24 g/L was considered to be the optimal dosage. As the temperature increased, the k value increased (Figure S6C) and the reaction rate was accelerated, 61 which was consistent with the results of Figure 5C.…”

Section: Influences Of Different Water Conditionssupporting

confidence: 87%

In situ growth of CuO on porous geopolymer spheres as green catalysts for enhanced peroxymonosulfate‐activated degradation of Orange I

Li,

Wang,

Bai

et al. 2023

J Am Ceram Soc.

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In this study, in situ growth of CuO on the surface of porous geopolymer catalyst spheres (GC) was prepared through a simple method for the activation of peroxymonosulfate (PMS) to degrade Orange I (OI) in water. GC‐0.01 exhibited an excellent performance with more than 95% degradation of OI within 30 min. The effects of PMS concentrations, catalyst dosage, Cl−, HCO3−, and humic acid (HA) on OI degradation in the GC‐0.01/PMS system were systematically investigated. The study of the mechanism showed that PMS combined with the catalyst to generate complexes on the surface of the spheres, which could degrade OI through an electron transfer pathway. In addition, a variety of reactive oxygen species, mainly 1O2, were also present in the GC‐0.01/PMS system, which could also degrade OI. This work provides new insight into the application of oxide‐modified geopolymers in the activation of PMS for water purification applications.

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Section: Influences Of Different Water Conditionssupporting

confidence: 87%

In situ growth of CuO on porous geopolymer spheres as green catalysts for enhanced peroxymonosulfate‐activated degradation of Orange I

Li,

Wang,

Bai

et al. 2023

J Am Ceram Soc.

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“…The Freundlich model describes incompletely reversible adsorption involving the formation of multilayered adsorption layers on the PRADS, with the heat of adsorption and affinity distributed over a nonuniform surface . The Freundlich model also fitted the experimental data well ( R 2 > 0.988), indicating the presence of physisorption on the inhomogeneous surface of PRADS.…”

Section: Results and Discussionmentioning

confidence: 82%

“…Biochar is a stabilized carbon matrix with a porous structure that offers exceptional physicochemical properties, including large specific surface area (SSA) and aromaticity, as well as economic advantages and sustainability . Biochar is widely used for the preparation of adsorbents; however, its carbonization process often leads to the production of pollutant gases . Phytolith is a noncrystalline mineral in living plants through silica deposition of cell walls, fillings of cell lumen, and intercellular spaces of the cortex near evaporating surfaces within plant tissue when the roots absorb dissolved silicon (monomeric silicic acid). , Phytolith in plants has been shown to have the potential for phytoremediation of soils .…”

Section: Introductionmentioning

confidence: 99%

Efficient Adsorbent Derived from Phytolith-Rich Ore for Removal of Tetracycline in Wastewater

Liu,

Tang,

Wang

et al. 2024

ACS Omega

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In recent decades, the tetracycline (TC) concentration in aquatic ecosystems has gradually increased, leading to water pollution problems. Various mineral adsorbents for the removal of tetracyclines have garnered considerable attention. However, efficient adsorbents suitable for use in a wide pH range environment have rarely been reported. Herein, a phytolith-rich adsorbent (PRADS) was prepared by a simple one-step alkali-activated pyrolysis treatment using phytolith as a raw material for effectively removing TC. PRADS, benefiting from its porous structure, which consists of acid-and alkali-resistant, fast-adsorbing macroporous silica and mesoporous carbon, is highly desirable for efficient TC removal from wastewater. The results indicate that PRADS exhibited excellent adsorption performance and stability for TC over a wide pH range of 2.0− 12.0 under the coexistence of competing ions, which could be attributed to the fact that PRADS has a porous structure and contains abundant oxygen-containing functional groups and a large number of bonding sites. The adsorption mechanisms of PRADS for TC were mainly attributed to pore filling, hydrogen bonding, π−π electron-donor−acceptor, and electrostatic interactions. This work could offer a novel preparation strategy for the effective adsorption of pollutants by new functionalized phytolith adsorbents.

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“…This process was attributed to external mass transfer, mainly the diffusion process of SDS from the boundary layer to the outer surface of PVB. At the same time, the large k id1 indicated that external diffusion was more important . In the second stage, the k id2 decreased, mainly because the adsorption sites decreased and the internal diffusion resistance increased with the adsorption process, resulting in a decrease in the diffusion rate, thus the adsorption increment tent to be flat.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…At the same time, the large k id1 indicated that external diffusion was more important. 33 In the second stage, the k id2 decreased, mainly because the adsorption sites decreased and the internal diffusion resistance increased with the adsorption process, resulting in a decrease in the diffusion rate, thus the adsorption increment tent to be flat. This stage was the gradual adsorption process of SDS on PVB particles.…”

Section: Effect Of Particle Sizementioning

confidence: 99%

Adsorption of Sodium Dodecyl Sulfonate from Aqueous Solution by Polyvinyl Butyral: Kinetics and Thermodynamics

Sun

Zeng

2023

Ind. Eng. Chem. Res.

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During the synthesis of polyvinyl butyral (PVB), sodium dodecyl sulfonate (SDS) is generally added in appropriate amounts, which prevents PVB from agglomeration but also causes PVB to turn yellow. The removal of SDS and its final residue in PVB are closely related to the adsorption performance of SDS on PVB. In this study, PVB with a high acetal degree (81.96 mol %) was synthesized by polyvinyl alcohol and butyraldehyde and was characterized by 1H NMR, Fourier transform infrared spectroscopy, scanning electron microscopyenergy-dispersive X-ray spectroscopy, and other methods. The adsorption properties of SDS on PVB were investigated under different initial pHs, PVB doses, PVB particle sizes, contact times, initial SDS concentrations, and temperatures. The adsorption kinetic data were analyzed using pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models. The results showed that the pseudo-second-order model fitted the adsorption data well, and the intraparticle diffusion was not the only control mechanism for PVB adsorption. The equilibrium data were analyzed with Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich models. The results showed that the adsorption data conformed to the Langmuir model, and the maximum adsorption capacity of PVB for SDS was 40.5168 mg/g at 290.15 K. Moreover, the Dubinin–Radushkevich model illustrated that the adsorption process was chemisorption at low SDS concentrations and physical adsorption otherwise. The thermodynamic parameters showed that the adsorption of SDS on PVB was spontaneous and exothermic. In conclusion, the research results provide some basis for the PVB purification plant equipment.

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Hydrothermal and pyrolytic conversion of sunflower seed husk into novel porous biochar for efficient adsorption of tetracycline

Cited by 46 publications

References 38 publications

In situ growth of CuO on porous geopolymer spheres as green catalysts for enhanced peroxymonosulfate‐activated degradation of Orange I

In situ growth of CuO on porous geopolymer spheres as green catalysts for enhanced peroxymonosulfate‐activated degradation of Orange I

Efficient Adsorbent Derived from Phytolith-Rich Ore for Removal of Tetracycline in Wastewater

Adsorption of Sodium Dodecyl Sulfonate from Aqueous Solution by Polyvinyl Butyral: Kinetics and Thermodynamics

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