Soil washing is a promising technology for the remediation of polycyclic aromatic hydrocarbons(PAH)-contaminated sites,but surfactant needs to be recovered to reduce remediation cost and avoid secondary pollution.In this study,activated carbon(AC),prepared from waste walnut shells,was applied to the adsorptive removal of phenanthrene(PHE)from synthetic soil washing effluent with Tween 80 as a model surfactant.Box-Behnken statistical experiment design(BBD)and response surface methodology(RSM)were used to investigate the influence of AC dosage,Tween 80 concentration and adsorption time,and their potential interaction effect on PHE removal.A response surface model was established based on the BBD experimental results.The goodness of fit of the model was confirmed by determination coeffi-cient,coefficient of variation(CV)and residuals analysis.The RSM model indicates that AC dosage or adsorption time had positive effect on PHE removal while Tween 80 concentration had negative effect.The interaction effect between AC dosage and Tween 80 concentration was significant but the other two interaction effects were not.The 3D response surface plots were developed based on the RSM equa-tion.The RSM model was validated by an additional experiment and the obtained result of PHE removal was very close to the model prediction,indicating the RSM model can effectively predict the PHE removal from soil washing effluent with activated carbon adsorption.

Zenan Wang;Xin Zheng;Yan Wang;Heng Lin;Hui Zhang

Department of Environmental Science and Engineering,Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory,School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079,China;Department of Environmental Science and Engineering,Anhui Science and Technology University,Fengyang 233100,China

中国化学工程学报（英文版）

[1]Zenan Wang;Xin Zheng;Yan Wang;Heng Lin;Hui Zhang-.Evaluation of phenanthrene removal from soil washing effluent by activated carbon adsorption using response surface methodology)[J].中国化学工程学报（英文版）,2022(02):399-405

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