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Employing a Magnetic Chitosan/Molybdenum Disulfide Nanocomposite for Efficiently Removing Polycyclic Aromatic Hydrocarbons From Milk Samples Publisher Pubmed



Rezagholizadeshirvan A1 ; Mohammadi M2 ; Mazaheri Y3 ; Fallahizadeh S4, 5 ; Ghorbani H6 ; Shokri S3 ; Shariatifar N3 ; Darroudi M7 ; Shamloo E1
Authors
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Authors Affiliations
  1. 1. Department of Food Science and Technology, Neyshabur University of Medical Sciences, Neyshabur, Iran
  2. 2. Department of Food Science and Technology, Faculty of Nutrition Science and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  3. 3. Food Safety Division, Department of Environmental Health, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. School of Public Health, Yasuj University of Medical Sciences, Yasuj, Iran
  5. 5. Social Determinants of Health Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
  6. 6. Razi Research Center, Khorasan Razavi Education, Mashhad, Iran
  7. 7. Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

Source: Scientific Reports Published:2024


Abstract

This study aimed to develop a highly efficient nanocomposite composed of magnetic chitosan/molybdenum disulfide (CS/MoS2/Fe3O4) for the removal of three polycyclic aromatic hydrocarbons (PAHs)—pyrene, anthracene, and phenanthrene. Novelty was introduced through the innovative synthesis procedure and the utilization of magnetic properties for enhanced adsorption capabilities. Additionally, the greenness of chitosan as a sorbent component was emphasized, highlighting its biodegradability and low environmental impact compared to traditional sorbents. Factors influencing PAH adsorption, such as nanocomposite dosage, initial PAH concentration, pH, and contact time, were systematically investigated and optimized. The results revealed that optimal removal efficiencies were attained at an initial PAH concentration of 150 mg/L, a sorbent dose of 0.045 g, pH 6.0, and a contact time of 150 min. The pseudo-second-order kinetic model exhibited superior fitting to the experimental data, indicating an equilibrium time of approximately 150 min. Moreover, the equilibrium adsorption process followed the Freundlich isotherm model, with kf and n values exceeding 7.91 mg/g and 1.20, respectively. Remarkably, the maximum absorption capacities for phenanthrene, anthracene, and pyrene on the sorbent were determined as 217 mg/g, 204 mg/g, and 222 mg/g, respectively. These findings underscore the significant potential of the CS/MoS2/Fe3O4 nanocomposite for efficiently removing PAHs from milk and other dairy products, thereby contributing to improved food safety and public health. © The Author(s) 2024.
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