A multi-stage activated carbon impregnation system: Isotherms, kinetics and multi-objective modeling optimization

Hu, Jianfeng; Zhang, Qi; He, Chang; Chen, Qing L.; Qi, Zhiwen; Li, Qing-en; Zhang, Bing J.

doi:10.1016/j.ces.2020.115895

Cited by 4 publications

(1 citation statement)

References 57 publications

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“…The pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetic models were used to fit the experimental data to analyze the adsorption process, as shown in Figure a–f. Also the corresponding kinetic parameters, such as adsorption capacity ( q e , mmol/g), R.E.%, and initial adsorption rate ( h , mmol/g/min), are shown in Figure g–i and Table S2. , The fitting results suggest that the adsorption capacity, removal efficiency, and initial adsorption rate all have a relationship: MTDSA > MTD > MNPs > TD > RD.…”

Section: Resultsmentioning

confidence: 99%

Diatomite-Based Adsorbent Decorated with Fe₃O₄ Nanoparticles for the Removal of Hazardous Metal Ions

Zhao

Sun

Liu

et al. 2023

ACS Appl. Nano Mater.

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Diatomite has been verified as an economical adsorbent to treat wastewater. Unfortunately, limited by poor regeneration and an inert surface with less active silanol groups, the retrievable and efficient diatomite-based adsorbent needs to be further explored. Here, on the basis of the thorough activation treatments of the raw diatomite, we developed a diatomite-based adsorbent with a uniform assembly of Fe3O4 nanoparticles on the surface. The nanocomposite possesses a high specific surface area, the trait of magnetic separation, and more functional groups for adsorption. The maximum adsorption capacities of Pb2+, Ni2+, and Cd2+ at 314 K reached 0.97, 1.18, and 0.88 mmol/g, respectively, which were more competitive than those of previously reported diatomite-based adsorbents. The experimental data fitted well with the pseudo-second-order kinetic model and Freundlich isotherm model, demonstrating that the adsorption was mainly derived from the electrostatic interaction and chelation between the hydroxyl/carboxyl groups on multilayer surfaces and the hazardous metal ions. According to the analytical results of the adsorption isotherms and response surface optimization, the removal efficiency can exceed 94%, obtained by increasing the pH and reaction temperature. The activation-enhanced surface engineering can arouse the adsorption potential of a diatomite-based adsorbent and provide universal perspectives into the concept design of a nanocomposite adsorbent with lower cost recovery and higher adsorption efficiency.

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Section: Resultsmentioning

confidence: 99%

Diatomite-Based Adsorbent Decorated with Fe₃O₄ Nanoparticles for the Removal of Hazardous Metal Ions

Zhao

Sun

Liu

et al. 2023

ACS Appl. Nano Mater.

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Liquid-phase esterification of methacrylic acid with methanol catalyzed by cation-exchange resin in a fixed bed reactor: Experimental and kinetic studies

Liu

Wang

Bian

et al. 2023

Chinese Journal of Chemical Engineering

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Chemically modified clay for adsorption of contaminants: trends, advantages and limitations - a concise review

Alomari

2024

International Journal of Environmental Analytical Chemistry

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A multi-stage activated carbon impregnation system: Isotherms, kinetics and multi-objective modeling optimization

Cited by 4 publications

References 57 publications

Diatomite-Based Adsorbent Decorated with Fe₃O₄ Nanoparticles for the Removal of Hazardous Metal Ions

Diatomite-Based Adsorbent Decorated with Fe₃O₄ Nanoparticles for the Removal of Hazardous Metal Ions

Liquid-phase esterification of methacrylic acid with methanol catalyzed by cation-exchange resin in a fixed bed reactor: Experimental and kinetic studies

Chemically modified clay for adsorption of contaminants: trends, advantages and limitations - a concise review

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A multi-stage activated carbon impregnation system: Isotherms, kinetics and multi-objective modeling optimization

Cited by 4 publications

References 57 publications

Diatomite-Based Adsorbent Decorated with Fe3O4 Nanoparticles for the Removal of Hazardous Metal Ions

Diatomite-Based Adsorbent Decorated with Fe3O4 Nanoparticles for the Removal of Hazardous Metal Ions

Liquid-phase esterification of methacrylic acid with methanol catalyzed by cation-exchange resin in a fixed bed reactor: Experimental and kinetic studies

Chemically modified clay for adsorption of contaminants: trends, advantages and limitations - a concise review

Contact Info

Product

Resources

About

Diatomite-Based Adsorbent Decorated with Fe₃O₄ Nanoparticles for the Removal of Hazardous Metal Ions

Diatomite-Based Adsorbent Decorated with Fe₃O₄ Nanoparticles for the Removal of Hazardous Metal Ions