Introduction
Materials and methods
Study area
Sampling
Sampling sites | Latitude | Longitude | Depth (m) |
---|---|---|---|
S1 | 50°354′N | 18°601′E | 0.4 |
S2 | 50°357′N | 18°597′E | 0.8 |
S3 | 50°362′N | 18°584′E | 1.1 |
S4 | 50°365′N | 18°574′E | 8.0 |
S5 | 50°368′N | 18°564′E | 13.0 |
S6 | 50°370′N | 18°558′E | 17.0 |
S7 | 50°373′N | 18°543′E | 18.0 |
Analytical procedures
Sample pretreatment
Determination of metals and metalloid concentrations
The contamination degree and ecological risk assessment
Indices | Equation with description | Category | Category with description and abbreviations |
---|---|---|---|
Enrichment Factor (EF) index of single-element (Sakan et al. 2009) |
\({\text{E}}{{\text{F}}_x}=\frac{{({C_x}/{C_{{\text{ref}}}})~{\text{sediment}}}}{{({C_x}/{C_{{\text{ref}}}}){\text{ crust}}}}\)
| EF < 1 | No enrichment (NE) |
EF 1–3 | Minor enrichment (ME) | ||
EF 3–5 | Moderate enrichment (MDE) | ||
EF 5–10 | Moderately severe enrichment (MSE) | ||
EF 10–25 | Severe enrichment (SE) | ||
EF 25–50 | Very severe enrichment (VE) | ||
EF > 50 | Extremely severe enrichment (EE) | ||
Geoaccumulation Index (Igeo) index of single-element (Müller 1969) |
\({I_{{\text{geo}}}}={\log _2}\left( {\frac{{{C_n}}}{{1.5{B_n}}}} \right)\)
Cn—measured concentration of element in the sediment sample, Bn—geochemical background value in the Earth’s crust (Kabata-Pendias 2011) |
I
geo ≤ 0 | Practically uncontaminated (PUC) |
0 < Igeo ≤ 1 | Uncontaminated to moderately contaminated (U-MC) | ||
1 < Igeo ≤ 2 | Moderately contaminated (MC) | ||
2 < Igeo ≤ 3 | Moderately to Heavily contaminated (M-HC) | ||
3 < Igeo ≤ 4 | Heavily contaminated (HC) | ||
4 < Igeo ≤ 5 | Heavily to Extremely contaminated (H-EC) | ||
5 < Igeo | Extremely contaminated (EC) | ||
Contamination Factor (CF) index of single-element (Hakanson 1980) |
\({\text{CF}}=\frac{{C_{{0 - 1}}^{i}}}{{C_{n}^{i}}}\)
\(C_{{0 - 1}}^{i}\)—mean content of elements from at list five sampling sites, \(C_{n}^{i}\)—concentration of elements in the Earth’s crust | CF < 1 | Low contamination (LC) |
1 < CF < 3 | Moderate contamination (MC) | ||
3 < CF < 6 | Considerable contamination (CC) | ||
CF > 6 | Very high contamination (VHC) | ||
Potential Ecological Risk Factor (ER) index of single-element (Hakanson 1980) |
\({\text{ER}}=T_{f}^{i}{\text{CF}}\)
\(T_{{f~}}^{i}\)—toxic response factor of element; CF—Contamination Factor | ER < 40 | Low risk (LR) |
40 < ER ≤ 80 | Moderate risk (MR) | ||
80 < ER ≤ 160 | Considerable risk (CR) | ||
160 < ER ≤ 320 | High risk (HR) | ||
ER > 320 | Very high risk (VHR) | ||
Probable Effect Concentration (PEC) Threshold Effect Concentration (TEC) index of single-element (Macdonald et al. 2000) | Ecotoxicological criteria |
C
n < TEC | Non-polluted (NP) |
TEC < Cn < PEC | Neither polluted nor non-polluted (P-NP) | ||
C
n > PEC | Polluted (P) | ||
Degree of Contamination (DC) index of multi-element (Hakanson 1980) |
\({\text{DC}}=~\mathop \sum \nolimits^{} {\text{CF}}\)
CF—Contamination Factor | CD < 6 | Low degree of contamination (LD) |
6 < CD ≤ 12 | Moderate degree of contamination (MD) | ||
12 < CD ≤ 24 | Considerable degree of contamination (CD) | ||
CD > 24 | Very high degree of contamination (VHD) | ||
Risk Index (RI) index of multi-element (Hakanson 1980) |
\({\text{RI}}=~\mathop \sum \nolimits^{} {\text{ER}}\)
ER—Potential Ecological Risk Factor | RI < 150 | Low risk (LR) |
150 < RI < 300 | Moderate risk (MR) | ||
300 < RI < 600 | Considerable risk (CR) | ||
RI > 600 | High risk (HR) |
Statistical analysis
Results and discussion
Physicochemical characteristics of bottom sediments
Sampling sites | Al | As | Cd | Cr | Cu | Fe | Mn | Ni | Pb | Zn | pH | Eh | DM | OM | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(mg kg−1DM ± SD) | – | mV | % | % | |||||||||||
S1 | 6555 ± 1640 | 15.8 ± 4.6 | 5.4 ± 0.54 | 96.3 ± 16.4 | 139.9 ± 15.4 | 26,852 ± 5649 | 569 ± 108.1 | 38.0 ± 5.31 | 183.5 ± 31.3 | 1258.9 ± 390 | 7.3 | − 294.1 | 48.9 | 20.0 | |
S2 | 5952 ± 1490 | 12.8 ± 3.7 | 4.0 ± 0.04 | 86.7 ± 14.7 | 93.9 ± 10.3 | 20,199 ± 4240 | 390 ± 74.0 | 37.1 ± 5.2 | 95.8 ± 16.3 | 679.4 ± 210 | 7.1 | − 315.8 | 48.7 | 19.4 | |
S3 | 6566 ± 1640 | 18.9 ± 5.5 | 8.8 ± 0.88 | 119.7 ± 20.0 | 148.4 ± 16.0 | 30,272 ± 6360 | 849 ± 161.0 | 44.1 ± 6.2 | 178.1 ± 30.0 | 1455.8 ± 453 | 7.1 | − 345.8 | 21.6 | 8.3 | |
S4 | 13,659 ± 3430 | 18.4 ± 5.3 | 9.2 ± 0.92 | 108.1 ± 18.0 | 140.0 ± 15.0 | 32,242 ± 6760 | 1450 ± 276.0 | 41.9 ± 5.9 | 199.7 ± 34.0 | 1459.4 ± 453 | 7.2 | − 342.0 | 18.0 | 5.9 | |
S5 | 4268 ± 1070 | 14.4 ± 4.2 | 9.1 ± 0.91 | 121.9 ± 21.0 | 143.1 ± 16.0 | 30,112 ± 6320 | 571 ± 108.0 | 55.1 ± 7.7 | 126.8 ± 22.0 | 1276.7 ± 397 | 7.5 | − 317.5 | 22.8 | 8.3 | |
S6 | 6781 ± 1700 | 22.5 ± 6.5 | 14.1 ± 0.14 | 135.3 ± 23.0 | 149.3 ± 16.0 | 43,827 ± 9200 | 1020 ± 194.0 | 76.2 ± 10.7 | 200.3 ± 34.0 | 2059.2 ± 639 | 7.7 | − 346.4 | 16.7 | 6.0 | |
S7 | 9602 ± 2400 | 18.6 ± 5.4 | 8.5 ± 0.85 | 109.5 ± 19.0 | 188.2 ± 21.0 | 36,360 ± 7644 | 872 ± 166 | 53.6 ± 7.5 | 175.2 ± 30.0 | 1586.1 ± 493 | 7.9 | − 349.3 | 16.0 | 4.6 | |
Mean | 7626 | 17.3 | 8.4 | 111.1 | 143.3 | 31,409 | 817.3 | 49.4 | 165.6 | 1353.6 | 7.4 | − 330.1 | 27.5 | 10.4 | |
Minimum | 4268 | 12.8 | 4.0 | 86.7 | 93.9 | 20,199 | 390.0 | 37.1 | 95.8 | 679.4 | 7.1 | − 349.3 | 16.0 | 4.6 | |
Maximum | 13,659 | 22.5 | 14.1 | 135.3 | 188.2 | 43,827 | 1450.0 | 76.2 | 200.3 | 2059.2 | 7.9 | − 294.1 | 48.9 | 20.0 | |
SD | 3092 | 3.3 | 3.2 | 16.3 | 27.5 | 7403 | 353.6 | 13.7 | 39.4 | 414.3 | 0.3 | 21.1 | 14.7 | 6.0 | |
CV (%) | 40.5 | 18.7 | 38.1 | 14.7 | 19.2 | 23.6 | 43.3 | 27.8 | 23.8 | 29.7 | 4.4 | 6.4 | 53.5 | 58.2 | |
Detection limit (mg kg−1DM) | 12.5 | 0.58 | 1.0 | 0.08 | 0.38 | 12.5 | 0.2 | 0.14 | 0.21 | 2.5 | – | – | – | – | |
Measurement uncertainty (%) | 25 | 29 | 10 | 17 | 11 | 21 | 19 | 14 | 17 | 31 | – | – | – | – |
Al | As | Cd | Cr | Cu | Fe | Mn | Ni | Pb | Zn | pH | Eh | DM | OM | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Al | 1.0000 | |||||||||||||
As | 0.3647 | 1.0000 | ||||||||||||
Cd | 0.1342 |
0.8532
| 1.0000 | |||||||||||
Cr | − 0.1003 | 0.7371 |
0.9449
| 1.0000 | ||||||||||
Cu | 0.2848 | 0.6003 | 0.4999 | 0.5119 | 1.0000 | |||||||||
Fe | 0.2441 |
0.9083
|
0.9345
|
0.8367
| 0.7020 | 1.0000 | ||||||||
Mn |
0.8427
| 0.7078 | 0.6052 | 0.4221 | 0.4069 | 0.6061 | 1.0000 | |||||||
Ni | − 0.1581 | 0.6863 |
0.8942
|
0.8526
| 0.4373 |
0.8775
| 0.2548 | 1.0000 | ||||||
Pb | 0.5611 |
0.8462
| 0.6011 | 0.4786 | 0.6129 | 0.7108 |
0.7712
| 0.3328 | 1.0000 | |||||
Zn | 0.2447 |
0.9451
|
0.9193
|
0.8442
| 0.7091 |
0.9766
| 0.6330 |
0.8039
|
0.8162
| 1.0000 | ||||
pH | 0.0207 | 0.4486 | 0.5280 | 0.4711 | 0.7506 | 0.7288 | 0.1220 | 0.7261 | 0.2710 | 0.6212 | 1.000 | |||
Eh | − 0.4694 | − 0.7344 | − 0.6681 | − 0.5831 | − 0.5250 | − 0.6711 | − 0.6807 | − 0.4944 | − 0.4391 | − 0.6248 | − 0.3557 | 1.000 | ||
DM | − 0.3936 | − 0.7121 | − 0.8196 | − 0.7949 | − 0.6971 | − 0.7952 | − 0.7118 | − 0.6304 | − 0.5154 | − 0.7595 | − 0.5180 |
0.8653
| 1.000 | |
OM | − 0.5801 | − 0.5621 | − 0.0948 | 0.1164 | − 0.1678 | − 0.2605 | − 0.4749 | 0.0400 | − 0.5528 | − 0.3004 | 0.0163 | 0.4671 | 0.0912 | 1.000 |
Location | Al | As | Cd | Cr | Cu | Fe | Mn | Ni | Pb | Zn | References |
---|---|---|---|---|---|---|---|---|---|---|---|
(mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | (mg/kg− 1DM) | ||
Dzierżno Duże Reservoir, Poland | 6555.0 | 15.8 | 5.4 | 96.3 | 139.9 | 26852.0 | 569.0 | 38.0 | 183.5 | 1258.9 | This study |
Rybnik Reservoir, Poland | – | – | 25.8 | 129.8 | 451.7 | 38782.3 | 2018.7 | 71.1 | 118.6 | 1583.4 | Loska and Wiechuła (2003) |
Dzierżno Małe Reservoir, Poland | – | 12.3 | 2.4 | 66.1 | 21.5 | – | – | 23.8 | 69.6 | 342.6 | Jaguś et al. (2013) |
Malta Reservoir, Poland | – | – | 0.09 | 7.8 | 11.0 | 4460.0 | 693.0 | 4.2 | 2.7 | 72.0 | Rzymski et al. (2014) |
Brody Iłżeckie Reservoir, Poland | – | – | 2.5 | 41.4 | 16.6 | – | 549.0 | 14.3 | 69.2 | 345.0 | Smal eta al. (2015) |
Poraj Reservoir, Poland | 4840.0 | – | – | – | – | 12170.0 | – | – | – | – | Rozpondek et al. (2017) |
Jose Antonio Alzate Reservoir, Mexico | – | – | 2.5 | 85.0 | 35.0 | 37203.0 | – | 33.0 | 26.0 | 145.0 | Avila-Péres et al. (1999) |
Pertusillo Reservoir, Italy | 6149.9 | 1.7 | 0.7 | 7.9 | 9.5 | 5924.1 | 131.2 | 8.6 | 4.8 | 32.0 | Colella and D’Orsogna (2014) |
Asejire Reservoir, Nigeria | – | – | – | 0.03 | 43.7 | 39978.8 | 1.5 | 0.1 | 72.0 | 20.9 | Godwin et al. (2015) |
Castilseras Reservoir, Spain | 14.2 | 11.3 | – | 64.4 | 14.6 | 4.3 | 539.1 | 43.4 | 40.7 | 103.6 | García-Ordiales et al. (2016) |
Hoedong Reservoir, Korea | – | – | 1.6 | 28.7 | 57.6 | – | – | 17.2 | 60.5 | 247.8 | Lee et al. (2017) |
Assessment of contamination level and potential ecological risk
Metal | EF |
I
geo
| CF | ER | PEC/TEC | DC | RI | |||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
S1 | Al | 1.0 | – | − 4.1 | PUC | 0.1 | LC | – |
–
|
–
| 100.0 VHD | 1811.7 HR |
As | 103.7 |
EE
| 2.5 | M-HC | 8.8 |
VHC
| 87.8 |
CR
| P-NP | |||
Cd | 637.9 |
EE
| 5.2 |
EC
| 54.0 |
VHC
| 1620.0 |
VHR
|
P
| |||
Cr | 11.4 |
SE
| -0.6 | PUC | 1.0 | MC | 1.9 | LR | P-NP | |||
Cu | 30.1 |
VE
| 0.8 | U-MC | 2.5 | MC | 12.7 | LR | P-NP | |||
Fe | 10.3 |
SE
| − 0.8 | PUC | 0.9 | LC | – | – | P-NP | |||
Mn | 7.5 | MSE | − 1.2 | PUC | 0.6 | LC | 0.6 | LR | P-NP | |||
Ni | 22.4 |
SE
| 0.3 | U-MC | 1.9 | MC | 9.5 | LR | P-NP | |||
Pb | 144.5 |
EE
| 3.1 |
HC
| 12.2 |
VHC
| 61.2 | MR |
P
| |||
Zn | 212.5 |
EE
| 3.6 |
HC
| 18.0 |
VHC
| 18.0 | LR |
P
| |||
S2 | Al | 1.0 | – | − 4.3 | PUC | 0.1 | LC | – |
–
|
–
| 68.8 VHD | 1332.9 HR |
As | 92.5 |
EE
| 2.2 | MC | 7.1 |
VHC
| 71.1 | MR | P-NP | |||
Cd | 520.4 |
EE
| 4.7 |
H-EC
| 40.0 |
VHC
| 1200.0 |
VHR
|
P
| |||
Cr | 11.3 |
SE
| − 0.8 | PUC | 0.9 | LC | 1.7 | LR | P-NP | |||
Cu | 22.2 |
SE
| 0.2 | U-MC | 1.7 | MC | 8.5 | LR | P-NP | |||
Fe | 8.5 | MSE | − 1.2 | PUC | 0.7 | LC | – | – | P-NP | |||
Mn | 5.6 | MSE | − 1.8 | PUC | 0.4 | LC | 0.4 | LR | P-NP | |||
Ni | 24.7 |
SE
| 0.3 | U-MC | 1.9 | MC | 9.5 | LR | P-NP | |||
Pb | 83.1 |
EE
| 2.1 | MC | 6.4 |
VHC
| 31.9 | LR | P-NP | |||
Zn | 126.2 |
EE
| 2.7 | MC | 9.7 |
VHC
| 9.7 | LR |
P
| |||
S3 | Al | 1.0 | – | − 4.1 | PUC | 0.1 | LC | – |
–
| – | 139.3 VHD | 2853.0 HR |
As | 123.8 |
EE
| 2.8 | MC | 10.5 |
VHC
| 105.0 |
CR
| P-NP | |||
Cd | 1037.9 |
EE
| 5.9 |
EC
| 88.0 |
VHC
| 2640.0 |
VHR
|
P
| |||
Cr | 14.1 |
SE
| − 0.3 | PUC | 1.2 | MC | 2.4 | LR |
P
| |||
Cu | 31.8 |
VE
| 0.8 | U-MC | 2.7 | MC | 13.5 | LR | P-NP | |||
Fe | 11.6 |
SE
| − 4.1 | PUC | 1.0 | MC | – | – | P-NP | |||
Mn | 11.1 |
SE
| − 0.7 | PUC | 0.9 | LC | 0.9 | LR | P-NP | |||
Ni | 26.0 |
VE
| 0.6 | U-MC | 2.2 | MC | 11.0 | LR | P-NP | |||
Pb | 140.0 |
EE
| 3.1 |
HC
| 11.9 |
VHC
| 59.4 | MR |
P
| |||
Zn | 245.3 |
EE
| 3.8 |
HC
| 20.8 |
VHC
| 20.8 | LR |
P
| |||
S4 | Al | 1.0 | – | − 3.1 | PUC | 0.2 | LC | – |
–
| – | 144.9 VHD | 2976.6 HR |
As | 58.0 |
EE
| 2.8 |
M-HC
| 10.2 |
VHC
| 102.2 |
CR
| P-NP | |||
Cd | 521.6 |
EE
| 5.9 |
EC
| 92.0 |
VHC | 2760.0 |
VHR
|
P
| |||
Cr | 6.1 | MSE | − 0.5 | PUC | 1.1 | MC | 2.2 | LR | P-NP | |||
Cu | 14.4 |
SE
| 0.8 | U-MC | 2.5 | MC | 12.7 | LR | P-NP | |||
Fe | 5.9 | MSE | − 0.5 | PUC | 1.0 | MC | – | – | P-NP | |||
Mn | 9.1 | MSE | 0.1 | U-MC | 1.6 | LC | 1.6 | LR |
P
| |||
Ni | 11.9 |
SE
| 0.5 | U-MC | 2.1 | MC | 10.5 | LR | P-NP | |||
Pb | 75.5 |
EE
| 3.1 |
HC
| 13.3 |
VHC
| 66.6 | MR |
P
| |||
Zn | 118.2 |
EE
| 3.8 |
HC
| 20.8 |
VHC
| 20.8 | LR |
P
| |||
S5 | Al | 1.0 | – | − 4.8 | PUC | 0.1 | LC | – | – | – | 133.9 VHD | 2900.4 HR |
As | 145.2 |
EE
| 2.4 |
M-HC
| 8.0 |
VHC
| 80.0 | MR | P-NP | |||
Cd | 1651.1 |
EE
| 5.9 |
EC
| 91.0 |
VHC
| 2730.0 |
VHR
| P-NP | |||
Cr | 22.1 |
SE
| − 0.3 | PUC | 1.2 | MC | 2.4 | LR | P-NP | |||
Cu | 47.2 |
VE
| 0.8 | U-MC | 2.6 | MC | 13.0 | LR | P-NP | |||
Fe | 17.7 |
SE
| − 0.6 | PUC | 1.0 | LC | – | – | P-NP | |||
Mn | 11.5 |
SE
| − 1.2 | PUC | 0.6 | LC | 0.6 | LR |
P
| |||
Ni | 50.0 |
VE
| 0.9 | U-MC | 2.8 | MC | 13.8 | LR |
P
| |||
Pb | 153.4 |
EE
| 2.5 |
M-HC
| 8.5 |
VHC
| 42.3 | MR | P-NP | |||
Zn | 330.9 |
EE
| 3.6 |
HC
| 18.2 |
VHC
| 18.2 | LR |
P
| |||
S6 | Al | 1.0 | – | − 4.1 | PUC | 0.1 | LC | – |
–
| – | 206.8 VHD | 4487.6 HR |
As | 142.8 |
EE
| 3.1 |
HC
| 12.5 |
VHC
| 125.0 |
CR
| P-NP | |||
Cd | 1610.2 |
EE
| 6.6 |
EC
| 141.0 |
VHC
| 4230.0 |
VHR
|
P
| |||
Cr | 15.5 |
SE
| − 0.1 | PUC | 1.4 | MC | 2.7 | LR |
P
| |||
Cu | 31.0 |
VE
| 0.9 | U-MC | 2.7 | MC | 13.6 | LR | P-NP | |||
Fe | 16.2 |
SE
| − 0.1 | PUC | 1.4 | MC | – | – |
P
| |||
Mn | 12.9 |
SE
| − 0.4 | PUC | 1.1 | LC | 1.1 | LR |
P
| |||
Ni | 43.5 |
VE
| 1.3 | MC | 3.8 |
CC
| 19.1 | LR |
P
| |||
Pb | 152.5 |
EE
| 3.2 |
HC
| 13.4 |
VHC
| 66.8 | MR |
P
| |||
Zn | 335.9 |
EE
| 4.3 |
H-EC
| 29.4 |
VHC
| 29.4 | LR |
P
| |||
S7 | Al | 1.0 | – | − 3.6 | PUC | 0.1 | LC | – |
–
| – | 139.1 VHD | 2768.0 HR |
As | 83.3 |
EE
| 2.8 |
M-HC
| 10.3 |
VHC
| 103.3 |
CR
| P-NP | |||
Cd | 685.3 |
EE
| 5.8 |
EC
| 85.0 |
VHC
| 2550.0 |
VHR
|
P
| |||
Cr | 8.8 | MSE | − 0.5 | PUC | 1.1 | MC | 2.2 | LR | P-NP | |||
Cu | 27.6 |
VE
| 1.2 | MC | 3.4 |
CC
| 17.1 | LR |
P
| |||
Fe | 9.5 | MSE | − 0.3 | PUC | 1.2 | MC | – | – | P-NP | |||
Mn | 7.8 | MSE | − 0.6 | PUC | 1.0 | LC | 1.0 | LR | P-NP | |||
Ni | 21.6 |
SE
| 0.8 | U-MC | 2.7 | MC | 13.4 | LR |
P
| |||
Pb | 94.1 |
EE
| 3.0 |
HC
| 11.7 |
VHC
| 58.3 | MR |
P
| |||
Zn | 182.7 |
EE
| 3.9 |
HC
| 22.7 |
VHC
| 22.7 | LR |
P
|