1. Indirectly polluted Directly polluted
2. component measurement mesocosm mesocosm mesocosm Field
3. Sediment PCB-153 pg/kg OC 50-70 130-350 800-1100 60-700 X;3PAH pg/kg OC 4000-9000 11000-16000 26000-30000 4000-29000 Cd Pb mg/kg drywt mg/kg drywt 0.5-1.0 70-100 100-150 2-4 160-190 7-10 0.2-6.0 40-230
4. Zn mg/kg dry wt 200-300 400-500 600-750 120-700
5. Hg mg/kg drywt 0.3-0.5 0.6-1.3 2-3 0.1-2.1