Central Composite experimental design applied to removal of phenanthrene and acenaphthene from soil samples

Authors

  • Ebadia, Taghi aDepartment of Civil & Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic)
  • Mehdinia, Ali bDepartment of Marine Science, Iranian National Institute for Oceanography and Atmospheric Sciences, Tehran, Iran
  • Qazinezhad, Mohammad aDepartment of Civil & Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic)
Abstract:

Abstract In this work, removal of phenanthrene and acenaphthene, as a representative of polycyclic aromatic hydrocarbons, was investigated from soil samples by the soil washing remediation method combined with Central Composite Design. Response surface methodology was utilized to investigate the individual and interactive effects of three variables of removal process including surfactant solution concentration ( ), bentonite content ( ) and phenanthrene/acenaphthene solution concentration ( ). The gas chromatographic results showed that the removal efficiencies were up to 91% for phenantherene and 98% for acenaphthene. A quadratic model with high accuracy (phenantherene: R2 = 0.96, adjusted R2 = 0.94 and acenaphthene: R2 = 0.99, adjusted R2 = 0.98) was developed and well described for the removal process of phenanthrene/acenaphthene from soil. Moreover, the process was optimized to reach maximum removal scenarios. The results confirmed the accuracy and reliability of the optimization process using RSM. Therefore, response surface methodology is a suitable approach to determine the optimal parameters for chemical soil washing to remove PAH from contaminated soil by using surfactant.

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Journal title

volume 8  issue 28

pages  81- 82

publication date 2017-06

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