TY - JOUR ID - TI - Electrokinetic movement of multiple chlorobenzenes in contaminated soils in the presence of β-cyclodextrin AU - YUAN Song-hu AU - WAN Jin-zhong and LU Xiao-hua VL - 19 IS - 8 PB - SP - 968 EP - 976 PY - JF - Journal of Environmental Sciences JA - J. Environ. Sci. UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=2007190811&flag=1 KW - chlorobenzenes; electrokinetic; soil remediation; β-cyclodextrin (β-CD) AB - This study investigated the electrokinetic (EK) behavior of multiple chlorobenzenes, including 1,2,3,4-tetrachlorobenzene (TeCB), 1,2,4,5-tetrachlorobenzene (i-TeCB), and 1,2,3-trichlorobenzene (TCB) in contaminated clayed soils. The e ect of β-cyclodextrin (β - CD) on the EK removal of the chlorobenzenes was studied. The largest removal was obtained when Na2CO3/NaHCO3 bu er was used as anodic purging solution without β-CD. The removal e ciencies were related to the aqueous solubilities of chlorobenzenes. With the same cumulative electroosmotic flow, greater solubility led to higher removal e ciency. The addition of β-CD inhibited the EK removal effciency of all chlorobenzenes. The inhibition increased with the increase of β-CD concentration. With the same β-CD concentration, the inhibition increased with the rise of electric potential. It was found that the inclusion compounds between β-CD and chlorobenzenzes were less soluble than chlorobenzenes. The formation of the less soluble inclusion compounds reduced the aqueous solubility of chlorobenzenes and led to the partial immobilization of the chlorobenzenes that desorbed from soil. It was feasible to use the EK technology to remove chlorobenzenes in contaminated soils using water as the anodic flushing solution. The addition of β-CD was not recommended for the EK removal of chlorobenzenes. ER -