USE OF BIOASSAYS IN DETERMINING THE ECOTOXICITY OF INDUSTRIAL SOILS

摘要

In conclusion, the elutriates from each industrial soil show acute and chronic toxicities to Vibrio fischeri and Selenastrum capricornutum, respectively. The bioluminescence inhibitions were as follows: 13.6 (SD: 4.6) % for industrial soil El, 68.9 (SD: 0.5) % for industrial soil E2, and 88.5 (SD: 0.5) % for industrial soil E3. The fluorescence inhibitions were found to be 17.6 (SD: 3.3) % for industrial soil El, 78.3 (SD: 1.4) % for industrial soil E2, and 98.7 (SD: 0.7) % for industrial soil E3. Ecotoxicities of the elutriates seem to be positively related with the degree of PAH contamination for each industrial soil. However, bioluminescence and fluorescence inhibitions cannot be attributed solely to PAHs since there are other contaminants present in these industrial soils. Thus, the bioluminescence and fluorescence inhibitions are due to the toxicity of the total pollutants present in each industrial soil that were leached out into the aqueous elutriate.