Table 4.
Aldehyde and acetone concentrations and their frequency of occurrence in monitored lake waters
| Compounds | Name of lake | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Góreckie (n = 12) | Sławskie (n = 10) | Strzeszyńskie (n = 10) | Swarzędzkie (n = 10) | Uzarzewskie (n = 14) | Maltańskie (n = 8) | |||||||||||||
| Concentration [μg/l] | Frequency of occurrence [%] | Concentration [μg/l] | Frequency of occurrence [%] | Concentration [μg/l] | Frequency of occurrence [%] | Concentration [μg/l] | Frequency of occurrence [%] | Concentration [μg/l] | Frequency of occurrence [%] | Concentration [μg/l] | Frequency of occurrence [%] | |||||||
| Range | Average | Range | Average | Range | Average | Range | Average | Range | Average | Range | Average | |||||||
| Formaldehyde | 8.89–122 | 72.6 | 100 | 6.14–80.0 | 36.6 | 100 | 5.78–85.0 | 43.7 | 100 | 15.1–155 | 58.1 | 100 | 4.44–157 | 62.8 | 100 | 14.7–91.1 | 40 | 100 |
| Acetaldehyde | 14.7–112 | 53.8 | 100 | 6.36–81.2 | 27 | 100 | 6.16–93.8 | 24 | 100 | 5.76–88.3 | 40.2 | 100 | 7.52–72.3 | 32.5 | 100 | 8.72–77.0 | 30.3 | 100 |
| Acetone | 3.85–57.9 | 21.4 | 100 | 3.85–61.5 | 23.4 | 100 | 5.38–36.9 | 19 | 100 | 3.92–96.2 | 34 | 100 | 7.15–63.9 | 20.6 | 100 | 3.38–58.8 | 18.4 | 100 |
| Propanal | 7.25–80.6 | 32 | 100 | 7.44–89.3 | 26.6 | 100 | 7.50–128 | 34.7 | 100 | 6.04–90.8 | 41.5 | 100 | 18.3–211 | 51.6 | 100 | 8.46–102 | 36.2 | 100 |
| Butanal | 3.20–24.4 | 8.14 | 92 | 1.76–7.60 | 4.56 | 90 | 2.00– 19.2 | 6.86 | 100 | 2.08–11.2 | 7.12 | 90 | 3.37–26.9 | 10 | 93 | 2.93–25.9 | 7.69 | 88 |
| Pentanal | 6.06–29.7 | 13.5 | 92 | 0.10–6.2 | 1.6 | 60 | 4.03–13.3 | 7.7 | 60 | 3.19– 17.8 | 9.54 | 70 | 3.94–40.0 | 12.3 | 93 | 5.28–30.3 | 10.4 | 75 |
| Hexanal | 4.49–51.5 | 17 | 100 | 2.34–9.02 | 4.95 | 100 | 2.88–74.9 | 17 | 80 | 4.83–52.2 | 22 | 90 | 4.20–87.0 | 22.6 | 86 | 9.02–28.5 | 15.5 | 75 |
| Heptanal | 6.17–113 | 33 | 92 | 4.94–18.9 | 12 | 30 | 7.00–30.8 | 14.6 | 50 | 6.11–96.7 | 43.9 | 60 | 5.17–17.8 | 11.94 | 43 | nd | ||
| Octanal | 3.21–33.0 | 13 | 83 | 2.50–10.4 | 6.43 | 20 | 6.07–13.2 | 6.43 | 20 | 8.57–8.75 | 8.66 | 20 | 4.72–4.72 | 4.72 | 7 | nd | ||
| Benzaldehyde | 2.18–18.3 | 7.39 | 67 | 10.8–10.8 | 10.8 | 10 | 2.21–2.21 | 2.21 | 10 | 16.4–16.6 | 16.5 | 30 | 6.42–16.7 | 11.5 | 14 | nd | ||
| Nonanal | 1.25–72.4 | 27.4 | 83 | 2.50–73.3 | 14.4 | 100 | 4.00–15.8 | 9.6 | 50 | 1.67–30.0 | 11.1 | 80 | 1.67–50.1 | 16.9 | 100 | 2.84–82.9 | 18.9 | 75 |
| Decanal | 1.93–49.1 | 20.8 | 83 | 3.71–58.9 | 15.6 | 70 | 3.76–73.9 | 23.1 | 40 | 8.36–19.4 | 11.9 | 40 | 3.21–41.9 | 13.5 | 50 | 2.64–13.9 | 7.3 | 75 |
| Glyoxal | 0.64–33 | 11 | 100 | 0.10–19 | 6 | 90 | 1.24–10.9 | 4.26 | 80 | 0.55–58 | 16.6 | 90 | 1.74–47.6 | 19.7 | 86 | 0.26–43 | 10.8 | 88 |
| Methylglyoxal | 0.11–20 | 7.2 | 100 | 3.64–22.7 | 9.35 | 60 | 0.95–18.4 | 7.27 | 89 | 0.93–91 | 21 | 80 | 0.72–40 | 15.1 | 64 | 1.02–19.7 | 6.17 | 100 |