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Statistical Modeling and Optimization of the Phosphorus Biosorption by Modified Lemna Minor From Aqueous Solution Using Response Surface Methodology (Rsm) Publisher



Naghipour D1 ; Taghavi K1 ; Jaafari J2 ; Mahdavi Y3 ; Ghanbari Ghozikali M4 ; Ameri R5 ; Jamshidi A6 ; Hossein Mahvi A2, 7, 8
Authors
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Authors Affiliations
  1. 1. School of Public Health, Guilan University of Medical Sciences, Rasht, Iran
  2. 2. School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Faculty of Health, Department of Environmental Health Engineering, Health Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran
  4. 4. Tabriz Health Services Management Research Center, Department of Environmental Health Engineering, East Azerbaijan Province Health Center, Tabriz University of Medical Sciences, Tabriz, Iran
  5. 5. Department of Environmental Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran
  6. 6. Department of Environmental Health Engineering, School of Public Health, Yasuj University of Medical Sciences, Yasuj, Iran
  7. 7. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
  8. 8. National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran

Source: Desalination and Water Treatment Published:2016


Abstract

Response surface methodology involving Box–Behnken design was used to evaluate the effects of three operating variables: pH, initial concentration of phosphorus, and adsorbent dosage on biosorption of phosphorus by modified Lemna minor by lab-scale batch study. Analysis of variance (ANOVA) showed pH, initial phosphorus concentration, interaction of phosphorus and adsorbent dose and the second-order effect of pH have values of “Prob. > F” less than 0.0500 indicating that model terms are significant for the biosorption of phosphorus. Optimum operational conditions for maximizing phosphorus biosorption were achieved at pH 4.8, initial phosphorus concentration of 19 mg/L and adsorbent dosage of 5.15 g/L. Under optimal value of parameters, high biosorption (89.2%) was obtained for phosphorus. Langmuir with 0.99 consistencies fitted better than Temkin, or Freundlich models. The maximum adsorption capacity of phosphorus was determined as 3.6 mg/g. Pseudo-second-order kinetic model exhibited the highest correlation with data. Results suggest that the modified L. minor has potential for biosorption as a low-cost and effective absorbent for phosphorus removal from aqueous solution. © 2015 Balaban Desalination Publications. All rights reserved.
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