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Modeling of Hexavalent Chromium Removal Onto Natural Zeolite From Air Stream in a Fixed Bed Column Publisher Pubmed



Rahmanzadeh E1 ; Golbabaei F2 ; Moussavi G3 ; Faghihi Zarandi A4 ; Dehghani F5 ; Ghorbanian M6
Authors
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Authors Affiliations
  1. 1. Student Research Committee, Iran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Occupational Health and Safety Engineering, School of Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
  4. 4. Department of Occupational Health and Safety Engineering, School of Health, Kerman University of Medical Sciences, Kerman, Iran
  5. 5. Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
  6. 6. Department of Environmental Health Engineering, School of Health, North Khorasan University of Medical Sciences, Bojnurd, Iran

Source: Scientific Reports Published:2024


Abstract

The increasing use of hexavalent chromium (Cr(VI)) has exposed large populations to this environmental and occupational carcinogenic agent. Therefore, researchers have been interested in removing this substance through adsorbents. This study aimed to investigate the efficiency of natural zeolite in the direct adsorption of Cr(VI) from airflow and its adsorption modeling. In this study, a nebulizer device produced the Cr(VI) mist. The efficiency of natural zeolite in Cr(VI) adsorption from airflow, modeling of fixed column adsorption, and the effective parameters on adsorption efficiency including the initial concentration of chromium, airflow rate, and adsorption bed depth were studied. To facilitate the prediction of the performance of natural zeolite’s adsorption column, Yoon–Nelson, Thomas, BDST, and Buhart–Adams models were used. The results showed that the adsorption capacity diminished with increased airflow rate and initial concentration, while it increased with elevated height of the adsorption bed. Yoon–Nelson, Thomas, and BDST models corresponded to experimental data with a correlation coefficient of 0.9933, but the information of the Buhart–Adams model had a lower correlation coefficient (around 0.6677). In conclusion, natural zeolite can be used as an efficient low-cost adsorbent for directly Cr(VI) removing from the airflow in a fixed bed column. © The Author(s) 2024.
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