A Stable Fe-Zn Modified Sludge-Derived Biochar for Diuron Removal: Kinetics, Isotherms, Mechanism, and Practical Research

Liu, Yucan; Ji, Xianguo; Wang, Ying; Zhang, Yan; Zhang, Yanxiang; Li, Wei; Yuan, Jiang; Ma, Dong; Sun, Hongwei; Duan, Jinming

doi:10.3390/molecules28062868

Cited by 6 publications

(2 citation statements)

References 52 publications

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“…The adsorption/desorption curve of WHCBC had an H3 hysteresis loop. The curve type was a typical type IV isotherm, according to the International Union of Pure and Applied Chemistry classification (Figure S3a), which was of the characteristics for mesoporous materials [36]. In addition, the pore volume and average pore size of WHCBC were higher than those of WHBC.…”

Section: Brunauer-emmett-teller Analysismentioning

confidence: 94%

Efficient Adsorption of Tebuconazole in Aqueous Solution by Calcium Modified Water Hyacinth-Based Biochar: Adsorption Kinetics, Mechanism, and Feasibility

Liu

Gao

et al. 2023

Molecules

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The application of fungicides (such as tebuconazole) can impose harmful impacts on the ecosystem and humans. In this study, a new calcium modified water hyacinth-based biochar (WHCBC) was prepared and its effectiveness for removing tebuconazole (TE) via adsorption from water was tested. The results showed that Ca was loaded chemically (CaC2O4) onto the surface of WHCBC. The adsorption capacity of the modified biochar increased by 2.5 times in comparison to that of the unmodified water hyacinth biochar. The enhanced adsorption was attributed to the improved chemical adsorption capacity of the biochar through calcium modification. The adsorption data were better fitted to the pseudo-second-order kinetics and the Langmuir isotherm model, indicating that the adsorption process was dominated by monolayer adsorption. It was found that liquid film diffusion was the main rate-limiting step in the adsorption process. The maximum adsorption capacity of WHCBC was 40.5 mg/g for TE. The results indicate that the absorption mechanisms involved surface complexation, hydrogen bonding, and π–π interactions. The inhibitory rate of Cu2+ and Ca2+ on the adsorption of TE by WHCBC were at 4.05–22.8%. In contrast, the presence of other coexisting cations (Cr6+, K+, Mg2+, Pb2+), as well as natural organic matter (humic acid), could promote the adsorption of TE by 4.45–20.9%. In addition, the regeneration rate of WHCBC was able to reach up to 83.3% after five regeneration cycles by desorption stirring with 0.2 mol/L HCl (t = 360 min). The results suggest that WHCBC has a potential in application for removing TE from water.

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Section: Brunauer-emmett-teller Analysismentioning

confidence: 94%

Efficient Adsorption of Tebuconazole in Aqueous Solution by Calcium Modified Water Hyacinth-Based Biochar: Adsorption Kinetics, Mechanism, and Feasibility

Liu

Gao

et al. 2023

Molecules

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“…It is therefore necessary to establish the equilibrium relationship between the solid and liquid phase Cd concentrations under the equilibrium conditions. In this study, the adsorption capacity of Cd by cow manure and corn straw magnetic biochars were investigated with the Langmuir and Freundlich adsorption isotherms (Liu et al 2023).…”

Section: Isotherm and Kinetics Analysismentioning

confidence: 99%

Removal of Cadmium from Aqueous Solution by Magnetic Biochar: Adsorption Characteristics and Mechanism

Li,

Niu,

et al. 2023

Preprint

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Experiments were conducted to investigate the potential for the efficient resource utilization of waste cow manure and corn straw in an agricultural ecosystem. In this study, magnetic biochar of cow manure and straw was synthesized by co-precipitation method, and cadmium was removed by adsorption in aqueous solution. Several physicochemical characterization techniques were applied, including scanning electron microscopy, Brunauer-Emmett-Teller (BET), Zeta potential analysis, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy. The effects of pH value, magnetic biochar content, kinetics and isotherm on the adsorption of cadmium were investigated. The physicochemical characterizations revealed that the physical and chemical properties of the magnetic biochar were substantially changed compared to the unmodified biochar. The results showed that the surface of biochar became rough, the number of oxygen-containing functional groups increased, and the specific surface area increased. The results of adsorption experiments show that the adsorption capacity is affected by pH, magnetic biochar addition, cadmium concentration and adsorption time. The adsorption kinetics and isothermal adsorption experiments showed that the Cd adsorption processes of the cow manure and corn straw magnetic biochars were consistent with the Freundlich model and quasi-second-order kinetic model. The results of this study also showed that Cd adsorption effect of cow manure magnetic biochar was found to be more effective than that of corn straw magnetic biochar. In conclusion, the magnetic biochar of cow dung is an effective adsorbent for the absorption of cadmium in wastewater.

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Removal of cadmium from aqueous solution by magnetic biochar: adsorption characteristics and mechanism

Li,

Niu,

et al. 2023

Environ Sci Pollut Res

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A Stable Fe-Zn Modified Sludge-Derived Biochar for Diuron Removal: Kinetics, Isotherms, Mechanism, and Practical Research

Cited by 6 publications

References 52 publications

Efficient Adsorption of Tebuconazole in Aqueous Solution by Calcium Modified Water Hyacinth-Based Biochar: Adsorption Kinetics, Mechanism, and Feasibility

Efficient Adsorption of Tebuconazole in Aqueous Solution by Calcium Modified Water Hyacinth-Based Biochar: Adsorption Kinetics, Mechanism, and Feasibility

Removal of Cadmium from Aqueous Solution by Magnetic Biochar: Adsorption Characteristics and Mechanism

Removal of cadmium from aqueous solution by magnetic biochar: adsorption characteristics and mechanism

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