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Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۴، شماره ۳، صفحات ۷۷۵-۷۹۰
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عنوان انگلیسی Methylene Blue Removal in Airlift Bioreactor Packed with Coelastrella Biosorbent
چکیده انگلیسی مقاله Water contamination by Methylene Blue (MB) is a significant environmental challenge that requires cost-effective purification strategies. The green algae Coelastrella was used as an adsorbent inside the airlift bioreactor as an effective and inexpensive material. Experiments were conducted over a range of conditions, including initial MB concentration (3-30 mg/L), contact time (0-60 min), air flow rate (200-300 mL/min), algae dosage (0.1-2 g/L), and temperature (20-40 ˚C). Diverse characterization techniques were employed to comprehensively understand the process and its outcomes. These techniques include Energy Dispersive Spectroscopy (EDS), Fourier Transform-InfraRed (FT-IR) spectroscopy, UV-Visible (UV-Vis) spectrophotometry, and Scanning Electron Microscopy (SEM). Adsorption isotherms were analyzed in this study, with a focus on the Langmuir, Freundlich, and Temkin models. The Langmuir model had the highest (R² = 0.9998), indicating monolayer adsorption with a maximum adsorption capacity of 30 mg/g. Additionally, kinetic studies found the pseudo-second-order model to be the most accurate (R² = 0.9990). Under optimal conditions, the process achieved a high removal efficiency of 98.9%. Finally, mass transfer adsorption models were examined using three models. When these models were compared, the Liquid film diffusion model had the highest value (R² = 0.9736). These results suggest that algae biomass is an effective, green adsorbent for MB removal, presenting a viable alternative to conventional treatments..
کلیدواژه‌های انگلیسی مقاله Airlift Bioreactor,Coelastrella,equilibrium,Kinetics,Thermodynamics and Mass Transfer
نویسندگان مقاله Ali Hussein Al-Sarji |
Department of Oil and Gas Refinery Engineering, Al-Farabi University College, Baghdad, IRAQ

Shurooq Talib Al-Humairi |
Chemical Engineering Department, University of Technology, Baghdad, IRAQ

Riyadh Sadeq Al-Mukhtar |
Chemical Engineering Department, University of Technology, Baghdad, IRAQ

Saja Mohsen Alardhi |
Nanotechnology and Advanced Materials Research Center, University of Technology, Baghdad, IRAQ

نشانی اینترنتی https://ijcce.ac.ir/article_721275_139c704b6f97e30076303c9726f02a76.pdf
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