Table 4.
Geometric mean Mn, Pb, and Zn concentration μg/g and (geometric SD) stratified by distance to the nearest ferroalloy plant.
| Distance (km) | Soil
|
Indoor
|
Outdoor
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Mn | Pb | Zn | N | Mn | Pb | Zn | N | Mn | Pb | Zn | |
| <0.5 | 88 | 2200a (3.2) | 63a (2.6) | 260a (2.8) | 7 | 610a (2.7) | 53a (1.5) | 470a (2.0) | 6 | 1400a (2.3) | 100a (1.9) | 670a (1.5) |
| ≥0.5 – <1.0 | 45 | 1600a (2.7) | 46ab (2.1) | 150b (1.8) | 9 | 420ab (1.8) | 91a (3.1) | 700a (2.6) | 8 | 1400a (2.4) | 100a (3.4) | 580a (1.9) |
| ≥1.0 – <1.5 | 29 | 880b (1.9) | 37b (1.6) | 140b (1.6) | 9 | 310b (2.1) | 64a (1.4) | 420a (1.5) | 8 | 1200a (1.4) | 190a (3.6) | 890a (3.0) |
| ≥1.5 | 90 | 910b (1.5) | 36b (1.7) | 140b (1.7) | 60 | 300b (1.7) | 60a (2.8) | 500a (1.7) | 59 | 950a (1.7) | 120a (1.8) | 690a (2.3) |
Same letter indicates no significant difference.