Anthropogenic impact on inter-tidal area of Yellow River Delta:Indicated by activity of linear alkyl benzenes(LABs)

The surface and column sediments were collected and analyzed in the intertidal areas of the Yellow River Delta in Sep.2007,and Apr.Jul.2008,in order to study the characteristics of distribution and degradation of linear alkyl benzenes(LABs).The concentrations of total LABs(ΣLABs) in the surface sediments ranged at(0.33～37.33)×10-6(dry weight),showing a decreased tendency from near shore to off shore areas,as well as that from close estuary to far estuary.This tendency is corresponded with the horizontal impact of anthropogenic activity.The ΣLABs in the column sediments were located at(5.67～79.67)×10-6(dry weight),waving at about 9 cm intervals by depth,which showed that the seasonal and annual variations of detergent dosage from the local city.