ANALYSIS AND FATE OF ALIPHATIC-HYDROCARBONS, LINEAR ALKYLBENZENES, POLYCHLORINATED-BIPHENYLS AND POLYCYCLIC AROMATIC-HYDROCARBONS IN SEWAGE-SLUDGE AMENDED SOILS

Different extraction and clean-up methods for the multi-residue determ ination of aliphatic hydrocarbons (AHCs), linear alkylbenzenes (LABs), polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) in sewage sludge-amended soil were investigated. Soxhlet extra ction with dichloromethane and actived silica gel clean-up provided th e best results, HRGC with FID detection, HRGC with ECD detection, and HPLC with a programmable fluorescence detection, performed accurate id entification and quantification of AHCs and LABs, PCBs and PAHs, respe ctively. The evolution of the pollutants in sludged soil has been moni tored for a 594-day period. Results indicated that AHCs, LABs and low- molecular-mass PAHs were susceptible to loss processes, whereas high-m olecular-mass PAHs and PCBs were persistent. (C) 1997 Published by Els evier Science Ltd.