Table 1 Summary of concentrations and mass accumulation rates (MARs) of black carbon (BC), char and soot, as well as of parent-PAHs (∑28PAHs), oxygenated PAHs (∑15OPAHs) and azaarenes (∑4AZAs) in the Huguangyan Maar Lake (HGY) and the Chaohu Lake (CH) in different periods.
Concentration (mg g−1) | MARs (μg cm−2 yr−1) | Concentration (ng g−1) | MAR (ng cm−2 yr−1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BC | Char | Soot | BC | Char | Soot | ∑28PAHs | ∑15OPAHs | ∑4AZAs | ∑28PAHs | ∑15OPAHs | ∑4AZAs | |
Lake Huguangyan Maar (HGY) | ||||||||||||
1980–2012 | 1.18 ± 0.38 | 0.62 ± 0.18 | 0.56 ± 0.23 | 48 ± 9 | 25 ± 4 | 23 ± 7 | 806.9 ± 335.6 | 406.6 ± 161.6 | 38.3 ± 30.9 | 35.0 ± 10.5 | 17.4 ± 4.5 | 1.6 ± 1.1 |
1950–1980 | 0.66 ± 0.07 | 0.34 ± 0.04 | 0.32 ± 0.05 | 34 ± 10 | 17 ± 5 | 17 ± 5 | 387.9 ± 33.5 | 174.7 ± 31.2 | 9.4 ± 2.1 | 21.1 ± 3.7 | 9.4 ± 1.6 | 0.5 ± 0.1 |
1850–1950 | 0.31 ± 0.03 | 0.21 ± 0.03 | 0.10 ± 0.02 | 10 ± 2 | 7 ± 1 | 3 ± 1 | 194.7 ± 46.4 | 134.6 ± 41.9 | 5.1 ± 4.9 | 6.7 ± 2.0 | 4.6 ± 1.7 | 0.17 ± 0.1 |
pre–1850 | 0.43 ± 0.11 | 0.32 ± 0.09 | 0.11 ± 0.03 | 13 ± 3 | 9 ± 3 | 3 ± 1 | 158.0 ± 42.8 | 138.4 ± 50.3 | 5.0 ± 2.2 | 4.7 ± 1.2 | 4.2 ± 1.4 | 0.15 ± 0.1 |
Highest/Lowest | 6.7 | 5.5 | 16.4 | 8.7 | 6.0 | 21.3 | 16.1 | 9.1 | 44.0 | 20.3 | 12.3 | 59.2 |
(1980-2012)/(1850-1950) | 3.8 | 2.9 | 6.0 | 4.8 | 3.6 | 7.7 | 4.2 | 3.1 | 8.0 | 5.2 | 3.8 | 9.3 |
Lake Chaohu (CH) | ||||||||||||
1980–2012 | 0.76 ± 0.14 | 0.36 ± 0.11 | 0.40 ± 0.10 | 116 ± 30 | 56 ± 20 | 60 ± 19 | 1174.5 ± 148.8 | 283.7 ± 88.2 | 108.5 ± 40.1 | 179.3 ± 44.0 | 43.5 ± 17.0 | 14.4 ± 6.6 |
1950–1980 | 0.55 ± 0.10 | 0.23 ± 0.04 | 0.32 ± 0.07 | 62 ± 10 | 26 ± 5 | 35 ± 7 | 706.9 ± 69.1 | 187.9 ± 26.5 | 114.0 ± 30.8 | 79.3 ± 8.0 | 21.3 ± 4.2 | 12.9 ± 4.1 |
1850–1950 | 0.30 ± 0.08 | 0.20 ± 0.05 | 0.10 ± 0.05 | 28 ± 7 | 19 ± 4 | 9 ± 4 | 118.3 ± 18.7 | 47.5 ± 14.0 | 99.4 ± 46.7 | 11.3 ± 2.4 | 4.6 ± 1.8 | 9.6 ± 5.3 |
pre–1850 | 0.34 ± 0.09 | 0.20 ± 0.05 | 0.14 ± 0.05 | 31 ± 8 | 18 ± 5 | 12 ± 5 | 113.0 ± 22.8 | 54.1 ± 36.8 | 45.8 ± 28.4 | 9.7 ± 2.9 | 4.9 ± 3.3 | 4.1 ± 2.6 |
Highest/Lowest | 5.0 | 3.6 | 10.8 | 8.9 | 6.9 | 19.3 | 17.9 | 19.4 | 36.9 | 35.9 | 34.5 | 106.6 |
(1980-2012)/(1850-1950) | 2.5 | 1.8 | 4.0 | 4.1 | 2.9 | 6.7 | 9.9 | 6.0 | 2.4 | 15.9 | 9.5 | 1.5 |
