Figure 1.
![Location of water reservoirs [33, 34]. Where A) Lake Gardno; B) Lake Swarzędzkie; C) Lake Szczutowskie; D) Wisła-Czarne dam Reservoir](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/682600dbf788d76dad43fd67/j_acee-2025-0014_fig_001.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKFDGEV5LZ%2F20251215%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251215T125353Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEIP%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDGV1LWNlbnRyYWwtMSJHMEUCIHIHMV9AE5pbYMuQ3sVDqAaX9nZosk410GnjE04p596PAiEA67NJUu1x1LnCIckcgWJ%2BtbqmZM%2F9oA2Gz4X7xh9Bn9QqvAUITBACGgw5NjMxMzQyODk5NDAiDP8rf5lMaXZmBfF%2FiyqZBYQcZSr3j%2BkD2seQz%2FZ990KOButZbsrR96QYfoqSncaLuZHjySmoxrMQxto3RMkJgC0EVKZA83YrLIOTTGRUovsK6YDSCyP3X0Xfp5NTun33V1Wa6LYFerKHzAlCtibhhQrbkbnNv8rVn64CH%2FhqQRw4183Y8jO0YEGeUbtYKbqEh%2BiMUceUdEGe7q2vTm3fXe%2FAZsyOjC%2BBAMfc0JZa%2Fz23anBPxe5srDorecaJmDrPu1nLJhHkvrK87rHqSa7DX%2F3GYhnpVxwfjuvQmFMUJLYWS4v9Fc9h%2FhVYZjcmKJQaSmSNUrvi%2FGtTq17LnRywKmtBciHKEcWElA6YGWDhgj3Jnz67CctsKU2jg8%2BR0Jt37A%2Bd6Nds8qMh1kJNDQLcgABr5u9r2kjG0K5YVxKKBOIxB3EgjZRBp6%2ByRe3QExSbuuFu5B9FgF0nmdflA1Ojlc9%2F5TnURVCtM8Oi5H6QFWwtS7gX9lPLICcuS3e9bLhsoZJy%2F6L3LKmackyYwuF1jSDfz6B1M%2FA4oonxXU1u4UfynzEyT7a7kTFmyxEJJOnm89QHUIRbVPSLzLFeHmkgPN5wLZnJ5HQhpWYxOOc3nFf2v%2FClxiONO18%2F3eSCCw%2BqCyJEj7sHtnZzQMxFWek1eP5pfKxw767UIDz4%2B8LdkoE0PeH5xnzNfz%2FEJn0mis6lAEbEfgVxn%2FiXEAQgIqY4xzq2nsSMEGk1aYEaa7PEN7x8ak1k7HJp20RcmQXJGDvAcds4MW6xxEPqEVNKN%2BQyXCob%2BfgrPapVXluEVY3n25XGVOaX05PYT9b9kmKZ5TyMiYM3QtOuG9Een6eizJie2UVN32OuiP6FCyvm9HUFXdD063GaCb7GAiAsZzkdwcujN5AlaYIeqgxJMIvW%2F8kGOrEBwiI8IbVMf%2Fm%2BX1TdujsaqW%2FLqPrj5tu39FXWF3ms9ydYds8zrwX5olJHWRvUHikaWgs%2BP%2F1C%2BjhXmXqbXTL2Vbi27TYDIqwujkYAaOb3ObfPvD2Rf0y0IlvsiHlRoDBQCrovtzDX0XSzpIm08%2BAko24ZffyhWsDsOFKMG%2F5D7dR8KA2H89ZwZRi9lEOMNweBM0q6zg0k4rMyll6Dbrvee%2BUgIbsz9QRC25LjjFjjiQct&X-Amz-Signature=91b4af833400deda7335b89f07c1cc6c10601cf76980432281a61c13ec9bc0b0&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Figure 2.

Results of carcinogenic risk assessment_
| CARCINOGENIC RISK | ||||||
|---|---|---|---|---|---|---|
| Metal(loid)s | Adults | Children | ||||
| CRing | CRdermal | TCR | CRing | CRdermal | TCR | |
| Lake Gardno | ||||||
| Cd | 8.95×10−8 | 3.57×10−10 | 8.99×10−8 | 1.57×10−7 | 4.39×10−10 | 1.57×10−7 |
| Cr | 1.68×10−6 | 2.68×10−7 | 1.95×10−6 | 2.94×10−6 | 3.30×10−7 | 3.27×10−6 |
| Ni | 3.97×10−6 | 3.96×10−7 | 4.37×10−6 | 6.95×10−6 | 4.87×10−7 | 7.44×10−6 |
| Pb | 2.83×10−8 | nd | 2.83×10−8 | 4.96×10−8 | nd | 4.96×10−8 |
| As | 2.66×10−6 | 7.77×10−7 | 3.44×10−6 | 4.65×10−6 | 9.54×10−7 | 5.61×10−6 |
| Lake Swarzędzkie | ||||||
| Cd | 1.36×10−6 | 5.43×10−9 | 1.37×10−6 | 2.38×10−6 | 6.67×10−9 | 2.39×10−6 |
| Cr | 2.14×10−6 | 3.42×10−7 | 2.48×10−6 | 3.75×10−6 | 4.20×10−7 | 4.17×10−6 |
| Ni | 5.80×10−6 | 5.78×10−7 | 6.38×10−6 | 1.01×10−5 | 7.10×10−7 | 1.09×10−5 |
| Pb | 7.96×10−8 | nd | 7.96×10−8 | 1.39×10−7 | nd | 1.39×10−7 |
| As | 1.32×10−6 | 3.86×10−7 | 1.71×10−6 | 2.31×10−6 | 4.74×10−7 | 2.79×10−6 |
| Lake Szczutowskie | ||||||
| Cd | 1.72×10−6 | 6.86×10−9 | 1.73×10−6 | 3.01×10−6 | 8.42×10−9 | 3.02×10−6 |
| Cr | 2.79×10−6 | 4.45×10−7 | 3.23×10−6 | 4.88×10−6 | 5.46×10−7 | 5.42×10−6 |
| Ni | 8.24×10−6 | 8.22×10−7 | 9.07×10−6 | 1.44×10−5 | 1.01×10−6 | 1.54×10−5 |
| Pb | 1.47×10−7 | nd | 1.47×10−7 | 2.58×10−7 | nd | 2.58×10−7 |
| As | 8.29×10−6 | 2.42×10−6 | 1.07×10−5 | 1.45×10−5 | 2.97×10−6 | 1.75×10−5 |
| Wisła-Czarne Reservoir | ||||||
| Cd | 2.47×10−6 | 9.86×10−9 | 2.48×10−6 | 4.32×10−6 | 1.21×10−8 | 4.34×10−6 |
| Cr | 5.90×10−6 | 9.42×10−7 | 6.84×10−6 | 1.03×10−5 | 1.16×10−6 | 1.15×10−5 |
| Ni | 2.12×10−5 | 2.12×10−6 | 2.33×10−5 | 3.71×10−5 | 2.60×10−6 | 3.98×10−5 |
| Pb | 6.56×10−8 | nd | 6.56×10−8 | 1.15×10−7 | nd | 1.15×10−7 |
| As | 3.77×10−6 | 1.10×10−6 | 4.87×10−6 | 6.60×10−6 | 1.35×10−6 | 7.95×10−6 |
Average daily exposure doses of metals in bottom sediments
| Metal(loid)s | Adults | Children | ||||
|---|---|---|---|---|---|---|
| ADDing | ADDdermal | ADDs | ADDing | ADDdermal | ADDs | |
| Lake Gardno | ||||||
| Cd | 1.47×10−8 | 5.86×10−11 | 1.47×10−8 | 2.57×10−8 | 7.19×10−11 | 2.58×10−8 |
| Cr | 3.36×10−6 | 1.34×10−8 | 3.38×10−6 | 5.89×10−6 | 1.65×10−8 | 5.90×10−6 |
| Cu | 6.48×10−6 | 2.59×10−8 | 6.51×10−6 | 5.67×10−5 | 1.59×10−7 | 5.69×10−5 |
| Ni | 2.34×10−6 | 9.32×10−9 | 2.35×10−6 | 4.09×10−6 | 1.14×10−8 | 4.10×10−6 |
| Pb | 3.33×10−6 | 1.33×10−8 | 3.35×10−6 | 5.84×10−6 | 1.63×10−8 | 5.85×10−6 |
| Zn | 3.48×10−5 | 1.39×10−7 | 3.49×10−5 | 3.04×10−4 | 8.52×10−7 | 3.05×10−4 |
| As | 1.77×10−6 | 2.12×10−7 | 1.99×10−6 | 3.10×10−6 | 2.61×10−7 | 3.36×10−6 |
| Lake Swarzędzkie | ||||||
| Cd | 2.23×10−7 | 8.90×10−10 | 2.24×10−7 | 3.90×10−7 | 1.09×10−9 | 3.92×10−7 |
| Cr | 4.29×10−6 | 1.71×10−8 | 4.30×10−6 | 7.50×10−6 | 2.10×10−8 | 7.52×10−6 |
| Cu | 5.89×10−5 | 2.35×10−7 | 5.92×10−5 | 5.16×10−4 | 1.44×10−6 | 5.17×10−4 |
| Ni | 3.41×10−6 | 1.36×10−8 | 3.42×10−6 | 5.97×10−6 | 1.67×10−8 | 5.99×10−6 |
| Pb | 9.37×10−6 | 3.74×10−8 | 9.41×10−6 | 1.64×10−5 | 4.59×10−8 | 1.64×10−5 |
| Zn | 1.27×10−4 | 5.06×10−7 | 1.27×10−4 | 1.11×10−3 | 3.11×10−6 | 1.11×10−3 |
| As | 8.81×10−7 | 1.05×10−7 | 9.86×10−7 | 1.54×10−6 | 1.29×10−7 | 1.67×10−6 |
| Lake Szczutowskie | ||||||
| Cd | 2.82×10−7 | 1.12×10−9 | 2.83×10−7 | 4.93×10−7 | 1.38×10−9 | 4.95×10−7 |
| Cr | 5.57×10−6 | 2.22×10−8 | 5.59×10−6 | 9.75×10−6 | 2.73×10−8 | 9.78×10−6 |
| Cu | 1.62×10−5 | 6.45×10−8 | 1.62×10−5 | 1.41×10−4 | 3.96×10−7 | 1.42×10−4 |
| Ni | 4.85×10−6 | 1.93×10−8 | 4.87×10−6 | 8.49×10−6 | 2.38×10−8 | 8.51×10−6 |
| Pb | 1.73×10−5 | 6.91×10−8 | 1.74×10−5 | 3.03×10−5 | 8.49×10−8 | 3.04×10−5 |
| Zn | 9.77×10−5 | 3.90×10−7 | 9.81×10−5 | 8.55×10−4 | 2.39×10−6 | 8.58×10−4 |
| As | 5.52×10−6 | 6.61×10−7 | 6.19×10−6 | 9.67×10−6 | 8.12×10−7 | 1.05×10−5 |
| Wisła-Czarne Reservoir | ||||||
| Cd | 4.05×10−7 | 1.62×10−9 | 4.07×10−7 | 7.09×10−7 | 1.98×10−9 | 7.11×10−7 |
| Cr | 1.18×10−5 | 4.71×10−8 | 1.18×10−5 | 2.07×10−5 | 5.78×10−8 | 2.07×10−5 |
| Cu | 3.92×10−5 | 1.56×10−7 | 3.93×10−5 | 3.43×10−4 | 9.60×10−7 | 3.44×10−4 |
| Ni | 1.25×10−5 | 4.98×10−8 | 1.25×10−5 | 2.19×10−5 | 6.12×10−8 | 2.19×10−5 |
| Pb | 7.71×10−6 | 3.08×10−8 | 7.75×10−6 | 1.35×10−5 | 3.78×10−8 | 1.35×10−5 |
| Zn | 2.70×10−4 | 1.08×10−6 | 2.71×10−4 | 2.36×10−3 | 6.61×10−6 | 2.37×10−3 |
| As | 2.51×10−6 | 3.01×10−7 | 2.81×10−6 | 4.40×10−6 | 3.69×10−7 | 4.77×10−6 |
Methodology for estimation of average daily dose
| CALCULATION OF AVERAGE DAILY DOSE FOR METAL(LOID)S VIA INGESTION AND DERMAL CONTACT (mg·kg−1·day−1) | |||
| Average daily dose for ingestion (ADDing) [14] |
| ||
| Average daily dose for dermal contact (ADDdermal) [14] |
| ||
| C – element concentration in the sediment sample; IRing – ingestion rate; EF – exposure frequency; ED – exposure duration; AF – adherence factor; ABS – dermal absorption factor; SA – surface area; BW – body weight; AT – averaging time; CF – conversion factor | |||
| THE PARAMETERS APPLIED TO THE ESTIMATION OF ADDS | |||
| Parameter | Unit | Parameter value Adults/Children | References |
| C | mg·kg−1 | - | This study |
| IRing | mg·day−1 | 100 / 200 | [16] |
| EF | day·year−1 | 350 | |
| ED | year | 30 / 6 | |
| AF(soil) | mg·cm−2 | 0.07 / 0.2 | |
| ABS | - | 0.001 | |
| SA | cm2 | 5700 / 2800 | |
| BW | kg | 70 / 16 | [14] |
| AT | days | 70×365 / carcinogens | |
| CF | kg·mg−1 | 10−6 | |
Ecological risk indices
| Index | Formula | Scale | Description |
|---|---|---|---|
| Geoaccumulation Index (Igeo) [12] |
| Igeo ≤ 0 | Practically uncontaminated |
| 0<Igeo ≤ 1 | Uncontaminated to moderately contam. | ||
| 1<Igeo ≤ 2 | Moderately contaminated | ||
| 2<Igeo ≤ 3 | Moderately to Heavily contam. | ||
| 3<Igeo ≤ 4 | Heavily contaminated | ||
| 4<Igeo ≤ 5 | Heavily to Extremely contaminated | ||
| Igeo >5 | Extremely contaminated | ||
| Potential Ecological Risk Factor (ER) [13] |
| ER≤40 | Low risk |
| 40<ER≤80 | Moderate risk | ||
| 80<ER≤160 | Considerable risk | ||
| 160<ER≤320 | High risk | ||
| ER>320 | Very high risk | ||
| Risk Index (RI) [13] | RI= ∑ERi | RI<150 | Low risk |
| 150<RI<300 | Moderate risk | ||
| 300<RI<600 | Considerable risk | ||
| RI>600 | High risk | ||
Results of the ecological risk assessment
| Metal(loid)s | Lake Gardno | Lake Swarzędzkie | Lake Szczutowskie | Wisła-Czarne Reservoir |
|---|---|---|---|---|
| Igeo | ||||
| Cd | −2.6 | 1.3 | 1.7 | 2.2 |
| Cr | −4.7 | −4.4 | −4.0 | −2.9 |
| Cu | −4.1 | −0.9 | −2.8 | −1.5 |
| Ni | −2.9 | −2.4 | −1.9 | −0.5 |
| Pb | −2.0 | −0.5 | 0.4 | −0.8 |
| Zn | −2.0 | −0.2 | −0.6 | 0.9 |
| As | 0.2 | −0.8 | 1.8 | 0.7 |
| ER | ||||
| Cd | 7.5 | 114.0 | 144.0 | 207.0 |
| Cr | 0.1 | 0.1 | 0.2 | 0.4 |
| Cu | 0.4 | 3.9 | 1.1 | 2.6 |
| Ni | 1.0 | 1.5 | 2.1 | 5.3 |
| Pb | 1.9 | 5.3 | 9.8 | 4.4 |
| Zn | 0.4 | 1.3 | 1.0 | 2.8 |
| As | 16.8 | 8.3 | 52.3 | 23.8 |
| RI | ||||
| Metal(loid)s | 28.1 | 134.5 | 210.5 | 246.3 |
Methodology for health risk assessment
| NON-CARCINOGENIC RISK ASSESSMENT | |||||
| Hazard Quotient (HQ) [14, 15] |
| ||||
| Hazard Index (HI) [14, 15] | HI=∑HQij | ||||
| RfD –reference dose of individual element | |||||
| CARCINOGENIC RISK ASSESSMENT | |||||
| Carcinogenic Risk (CR) [14, 15] | CRij = ADDij × SF | ||||
| Total Carcinogenic Risk (TCR) [14, 15] | |||||
| SF – cancer slope factor | |||||
| THE RFD AND SF VALUES OF ELEMENTS | |||||
| Element | RfDing | RfDdermal | SFing | SFdermal | References |
| mg·kg−1·day−1 | kg·day·mg−1 | ||||
| Cd | - | - | 6.10 | 6.10 | [45,46,47] |
| Cr | - | - | 5.00×10−1 | 20.0 | |
| Cu | 4.00×10−2 | 1.20×10−2 | - | - | |
| Ni | - | - | 1.70 | 42.50 | |
| Pb | - | - | 8.50×10−3 | nd | |
| Zn | 3.00×10−1 | 6.00×10−2 | - | - | |
| As | - | - | 1.5 | 3.66 | |
Results of non-carcinogenic risk assessment
| NON-CARCINOGENIC RISK | ||||||
|---|---|---|---|---|---|---|
| Metal | Adults | Children | ||||
| HQing | HQdermal | HI | HQing | HQdermal | HI | |
| Lake Gardno | ||||||
| Cu | 1.62×10−4 | 2.15×10−6 | 1.64×10−4 | 1.42×10−3 | 1.32×10−5 | 1.43×10−3 |
| Zn | 1.16×10−4 | 2.31×10−6 | 1.18×10−4 | 1.01×10−3 | 1.42×10−5 | 1.03×10−3 |
| Lake Swarzędzkie | ||||||
| Cu | 1.47×10−3 | 1.96×10−5 | 1.49×10−3 | 1.29×10−2 | 1.20×10−4 | 1.30×10−2 |
| Zn | 4.23×10−4 | 8.43×10−6 | 4.31×10−4 | 3.70×10−3 | 5.18×10−5 | 3.75×10−3 |
| Lake Szczutowskie | ||||||
| Cu | 4.04×10−4 | 5.37×10−6 | 4.09×10−4 | 3.54×10−3 | 3.30×10−5 | 3.57×10−3 |
| Zn | 3.26×10−4 | 6.50×10−6 | 3.32×10−4 | 2.85×10−3 | 3.99×10−5 | 2.89×10−3 |
| Wisła-Czarne Reservoir | ||||||
| Cu | 9.79×10−4 | 1.30×10−5 | 9.92×10−4 | 8.57×10−3 | 8.00×10−5 | 8.65×10−3 |
| Zn | 9.00×10−4 | 1.79×10−5 | 9.18×10−4 | 7.87×10−3 | 1.10×10−4 | 7.98×10−3 |
Characteristics of water reservoirs [25, 31, 35,36,37]
| Data | Lake Gardno | Lake Swarzędzkie | Lake Szczutowskie | Wisła-Czarne Reservoir |
|---|---|---|---|---|
| Type of reservoir | polygenetic (coastal) | post-glacial | glacial | dam reservoir (built-in years 1967 – 1973) |
| Surface area (km2) | 24.7 | 0.94 | 0.91 | 0.40 |
| Length - max (m) | 6850 | 2940 | 2110 | - |
| Width - max (m) | 4730 | 560 | 690 | - |
| Depth - max (m) | 2.6 | 7.2 | 4.4 | - |
| Volume (thousand m3) | 30950.5 | 2000 | 1689 | 5060 |
| Feeder waters | Łupawa, Bagienica Brodna, and Grabownica Rivers | Cybina River and Mielcuch stream | 5 drainage ditches; unnamed watercourses | Biała and Czarna Wisełka streams |
| Functions | tourism and recreation | tourism and recreation | tourism and recreation | water supply, flood control, tourism, and recreation |