Table 3. Concentrations of total and phytoavailable organic chemicals in soil.
| Chemicals | Concentration (µg/kg, µg/L)a) | Ct=C0e/kt | τ1/2 (days) | Mean Conc. (µg/kg, µg/L) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 d | 3 d | 7 d | 14 d | 22 d | C0 | k | r2 | |||
| Total organic chemicals in soil | ||||||||||
| Dinotefuran | 1263.0 | 1399.8 | 1372.0 | 1291.4 | 1295.9 | 1341.5 | 0.001 | 0.08 | >22 | 1319.4 |
| Imidacloprid | 1300.7 | 1475.5 | 1355.1 | 1234.1 | 1313.5 | 1377.3 | 0.003 | 0.20 | >22 | 1323.8 |
| Clothianidin | 1317.9 | 1392.6 | 1262.8 | 1156.1 | 1163.5 | 1355.3 | 0.008 | 0.77 | >22 | 1234.0 |
| Thiacloprid | 1289.7 | 1557.8 | 1363.9 | 1294.8 | 1364.6 | 1397.7 | 0.002 | 0.05 | >22 | 1364.9 |
| Fosthiazate | 1422.6 | 1479.5 | 1144.5 | 1009.3 | 1039.7 | 1421.6 | 0.018 | 0.74 | >22 | 1159.9 |
| Metalaxyl | 1272.0 | 1294.5 | 1071.6 | 1006.9 | 1061.3 | 1250.5 | 0.010 | 0.60 | >22 | 1111.0 |
| Fenobucarb | 827.0 | 879.3 | 665.1 | 693.9 | 728.3 | 810.8 | 0.008 | 0.31 | >22 | 742.4 |
| Procymidone | 1033.9 | 1158.7 | 844.0 | 959.0 | 962.6 | 1033.8 | 0.005 | 0.14 | >22 | 976.0 |
| Flutolanil | 1396.5 | 1590.6 | 1155.6 | 1383.0 | 1326.6 | 1410.2 | 0.004 | 0.07 | >22 | 1353.0 |
| β-HCH | 864.5 | 1080.6 | 947.0 | 915.5 | 925.9 | 959.7 | 0.002 | 0.03 | >22 | 940.6 |
| Tolclofos-methyl | 1149.7 | 1289.7 | 869.9 | 935.3 | 942.7 | 1146.8 | 0.012 | 0.38 | >22 | 1000.9 |
| Dieldrin | 1205.2 | 1278.8 | 1310.8 | 1122.8 | 1254.7 | 1248.4 | 0.001 | 0.04 | >22 | 1229.2 |
| Phytoavailable organic chemicals in soil | ||||||||||
| Dinotefuran | 511.6 | 427.8 | 396.0 | 271.4 | 255.3 | 491.9 | 0.033 | 0.92 | 20.8 | 335.2 |
| Imidacloprid | 40.2 | 28.6 | 20.2 | 11.9 | 11.3 | 34.9 | 0.060 | 0.88 | 11.6 | 17.5 |
| Clothianidin | 64.0 | 44.5 | 35.4 | 20.6 | 19.0 | 56.2 | 0.057 | 0.89 | 12.3 | 29.3 |
| Thiacloprid | 20.0 | 12.9 | 8.5 | 4.9 | 4.6 | 16.5 | 0.068 | 0.86 | 10.2 | 7.5 |
| Fosthiazate | 857.1 | 533.4 | 390.3 | 215.3 | 171.8 | 727.4 | 0.073 | 0.92 | 9.5 | 314.3 |
| Metalaxyl | 946.7 | 565.5 | 406.2 | 250.2 | 212.9 | 761.9 | 0.066 | 0.87 | 10.5 | 357.0 |
| Fenobucarb | 426.5 | 268.4 | 300.6 | 118.2 | 96.0 | 402.9 | 0.070 | 0.90 | 9.9 | 179.6 |
| Procymidone | 45.2 | 24.6 | 23.6 | 9.3 | 8.2 | 38.1 | 0.079 | 0.88 | 8.8 | 15.4 |
| Flutolanil | 101.4 | 44.4 | 40.5 | 14.5 | 12.2 | 77.3 | 0.095 | 0.87 | 7.3 | 26.0 |
| β-HCH | 33.7 | 21.9 | 16.3 | 11.4 | 10.5 | 27.6 | 0.051 | 0.84 | 13.6 | 15.3 |
| Tolclofos-methyl | 5.4 | 2.4 | 1.8 | 0.6 | 0.5 | 4.1 | 0.109 | 0.90 | 6.3 | 1.2 |
| Dieldrin | 1.6 | 1.2 | 0.7 | 0.8 | 0.6 | 1.3 | 0.037 | 0.71 | 18.9 | 0.9 |
a) The concentration of total organic chemicals were expressed in µg/kg per dry soil, and those of phytoavailable organic chemicals were expressed in µg/L.