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Environ Sci Pollut Res Int

Title:		Performance assessment of the MOF adsorbent MIL-101 for removal of gaseous benzene and toluene: kinetic column modeling and simulation studies of fixed-bed adsorption
Author(s):		Khoshakhlagh AH; Saadati Z; Golbabaei F; Morais S; Paiva AM; Shahtaheri SJ;
Address:		"Department of Occupational Health Engineering, School of Health, Kashan University of Medical Sciences, Kashan, Iran. Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran. Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. REQUIMTE-LAQV, Instituto Superior de Engenharia do Porto, Instituto Politecnico do Porto, Rua Dr. Antonio Bernardino de Almeida, 431, 4249-015, Porto, Portugal. Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. shahtaheri@tums.ac.ir. Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran. shahtaheri@tums.ac.ir"
Journal Title:		Environ Sci Pollut Res Int
Year:		2023
Volume:		20230612
Issue:		33
Page Number:		80791 - 80806
DOI:		10.1007/s11356-023-28019-5
ISSN/ISBN:		1614-7499 (Electronic) 0944-1344 (Linking)
Abstract:		"The adsorbent MIL-101, a metal-organic framework material, was synthesized, characterized, and tested for removal of relatively low concentrations of benzene and toluene adsorbates (200 ppm) from a gas phase in a continuous flow system. Breakthrough studies were modeled based on Thomas, Yoon-Nelson, Yan, Clark, Bohart-Adams, bed-depth service time, modified dose response, Wolborska, and Gompertz in the continuous fixed-bed operation. Through statistical analysis, it was determined which type of regression is most suitable for the studied models, linear or nonlinear. By comparing the values of error functions, it was possible to infer that the Thomas model is the best match for the experimental breakthrough curves for benzene (with maximum solid-phase concentration q(T)=126,750 mg/g) and the Gompertz model for toluene (parameter beta=0.01 min(-1)). Overall, when compared to the model parameters of the linear regression, those obtained through nonlinear regression show a stronger correlation with the results found experimentally. Thus, this type of regression is more suitable for the adsorption model analysis. The liquid film and intraparticle diffusion analysis was described, and it was suggested that both types of diffusion contribute to the adsorption mechanism of benzene and toluene on MIL-101. As for the isotherms, the adsorption process was better fitted by the Freundlich isotherm. The reusability of MIL-101 after six cycles was 76.5% for benzene and 62.4% for toluene, indicating that MIL-101 was a better adsorbent for the removal of benzene in comparison with toluene"
Keywords:		"*Metal-Organic Frameworks Benzene Adsorption Toluene *Water Purification/methods *Water Pollutants, Chemical Fixed-bed column tests Mass transfer mechanism Modified dose response model Volatile organic compounds;"
Notes:		"MedlineKhoshakhlagh, Amir Hossein Saadati, Zohreh Golbabaei, Farideh Morais, Simone Paiva, Ana Margarida Shahtaheri, Seyed Jamaleddin eng Germany 2023/06/12 Environ Sci Pollut Res Int. 2023 Jul; 30(33):80791-80806. doi: 10.1007/s11356-023-28019-5. Epub 2023 Jun 12"