Synergistic removal of aniline by carbon nanotubes and the enzymes of Delftia sp.XYJ6,a newly isolated bacterial strain for biodegrading aniline,was investigated.It showed that biodegradation rate of aniline was increased with the augment of protein concentration in cell-free extract of Delflia sp.XYJ6.The adsorption amount of aniline by multi-walled carbon nanotubes (MWCNTs)was slightly higher than that by single-walled carbon nanotubes (SWCNTs),however the adsorption amount of protein of Delftia sp.XYJ6 by MWCNTs was lower than that by SWCNTs.Much more amount of aniline could be removed by CE of Delftia sp.XYJ6 in the presence of SWCNTs than MWCNTs,which indicated that an efficient reaction between aniline and enzymes of Delftia sp.XYJ6 on the surface of SWCNTs played a key role in the rapid enzymatic biodegradation of aniline.This study is not previously reported and may be useful in basic research and the removal of aniline from wastewater.