Table 4 Presence of radioactivity in the different extracts of the sequential extraction (applied radioactivity 5.1 kBq 14C-TNT per g soil corresponding to 120 mg 2,4,6-TNT per kg soil dm)
From: Certainties and uncertainties in accessing toxicity of non-extractable residues (NER) in soil
Soil | 0.01 M CaCl2 | Tenax20 | Tenax1 week | Acetonitrile shaking | PLE | NER | Total recovery | ||
|---|---|---|---|---|---|---|---|---|---|
Water | Tenax | Water | Tenax | ||||||
Test start | |||||||||
01-A | 47.6% | 4.6% | 28.0% | 1.5% | 5.2% | 2.3% | 0.2% | 2.8% | 92.2% |
02-A | 40.3% | 4.8% | 36.9% | 2.5% | 3.8% | 2.8% | 0.6% | 9.3% | 101.0% |
03-G | 23.5% | 4.9% | 44.7% | 3.5% | 5.6% | 3.6% | 0.8% | 13.4% | 100.0% |
T = 6 months | |||||||||
01-A | 6.1% | 4.3% | 9.3% | 6.6% | 5.4% | 3.7% | n.d. | 50.4% | 85.8% |
02-A | 3.4% | 3.5% | 7.1% | 3.7% | 2.4% | 6.2% | 54.1% | 80.4% | |
03-G | 1.3% | 2.4% | 5.7% | 2.7% | 2.9% | 5.8% | 63.0% | 83.8% | |