Removal of high concentrations of polycyclic aromatic hydrocarbons from contaminated soil by biodiesel  

作　　者：Jinbao WU Zongqiang GONG Liyan ZHENG Yanli YI Jinghua JIN Xiaojun LI Peijun LI 

机构地区：[1]Key Laboratory of Pollution Ecology and Environmental Engineering,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China [2]Shenyang University of Chemical Technology,Shenyang 110142,China [3]Soil and Environment College,Shenyang Agriculture University,Shenyang 110161,China [4]No.202 Hospital of PLA,China [5]Environmental Protection Research Institute of Light Industry,Beijing 100089,China

出　　处：《Frontiers of Environmental Science & Engineering》2010年第4期387-394,共8页环境科学与工程前沿（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.20707030);the National High Technology Research and Development Program(863 program)of China(No.2008AA06Z331);the National Basic Research Program(973 Program)of China(No.2004CB418506).

摘　　要：Solubilizing experiments were carried out to evaluate the ability of biodiesel to remove polycyclic aromatic hydrocarbons(PAHs)from highly contaminated manufactured gas plant(MGP)and PAHs spiked soils with hydroxypropyl-β-cyclodextrin(HPCD)and tween 80 as comparisons.Biodiesel displayed the highest solubilities of phenanthrene(420.7 mg·L^(-1)),pyrene(541.0 mg·L^(-1)),and benzo(a)pyrene(436.3 mg·L^(-1)).These corresponded to several fold increases relative to 10%HPCD and tween 80.Biodiesel showed a good efficiency for PAH removal from the spiked and MGP soils for both low molecular weight and high molecular weight PAHs at high concentrations.Biodiesel was the best agent for PAH removal from the spiked soils as compared with HPCD and tween 80;as over 77.9%of individual PAH were removed by biodiesel.Tween 80 also showed comparable capability with biodiesel for PAH solubilization at a concentration of 10%for the spiked soils.Biodiesel solubilized a wider range of PAHs as compared to HPCD and tween 80 for the MPG soils.At PAH concentrations of 229.6 and 996.9 mg·kg^(-1),biodiesel showed obvious advantage over the 10%HPCD and tween 80,because it removed higher than 80%of total PAH.In this study,a significant difference between PAH removals from the spiked and field MGP soils was observed;PAH removals from the MGP soil by HPCD and tween 80 were much lower than those from the spiked soil.These results demonstrate that the potential for utilizing biodiesel for remediation of highly PAH-contaminated soil has been established.

关 键 词：polycyclic aromatic hydrocarbons(PAHs) BIODIESEL soil REMOVAL SOLUBILIZATION 

分 类 号：X53[环境科学与工程—环境工程]