Spatially Resolved Distribution, Sources, Exposure Levels, and Health Risks of Heavy Metals in <63 μm Size-Fractionated Road Dust from Lucknow City, North India
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Sample Collection and Chemical Analysis
2.3. Pollution Assessment
2.4. Statistical Analysis
2.5. Spatial Distribution
2.6. Risk Assessment
2.6.1. Potential Ecological Risk (PER)
2.6.2. Health Risk Assessment
3. Results
3.1. Heavy Metal Concentration in Road Dust
3.2. Pollution Assessment of Heavy Metals in Road Dust
3.3. Source Appointment of Heavy Metals in Road Dust
3.4. Spatial Distribution of Heavy Metals (Concentration) over the Lucknow Urban Area
3.5. Risk Assessment
3.5.1. Potential Ecological Risk (PER)
3.5.2. Human Health Risk Assessment
- Non-carcinogenic risk assessment
- Carcinogenic risk assessment
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
List of Abbreviation
ADI | Average Daily Intake |
CR | Cancer Risk |
CSF | Cancer-Slope Factor |
Er | Ecological Risk Factor |
HI | Hazard Index |
HM | Heavy Metal |
HMs | Heavy Metals |
HQ | Hazard Quotient |
HRA | Health Risk Assessment |
ICPMS | Inductively Coupled Plasma-Mass Spectroscopy |
IDW | Inverse Distance Weighting |
INSB | Indian Natural Soil Background |
IPI | Integrated Pollution Index |
LCR | Lifetime Cancer Risk |
PCA | Principal Component Analysis |
PER | Potential Ecological Risk |
PI | Pollution Index |
Tr | Toxic-Response Factor |
UCC | Upper Continental Crust |
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S.No. | Location | Functional Areas | Latitude | Longitude | S.No. | Location | Functional Areas | Latitude | Longitude |
---|---|---|---|---|---|---|---|---|---|
1 | Aishbagh | Residential | 26.84 | 80.92 | 33 | SmritiUpvan | Park | 26.79 | 80.92 |
2 | Krishna Nagar | Residential | 26.79 | 80.88 | 34 | Jonal Park | Park | 26.79 | 80.91 |
3 | Banthara | Residential | 26.69 | 80.84 | 35 | Malihabaad | Park | 26.92 | 80.71 |
4 | Aliganj | Residential | 26.90 | 80.95 | 36 | Transport Nagar | Commercial | 26.78 | 80.89 |
5 | Niralanagar | Residential | 26.88 | 80.94 | 37 | Mawaiya | Commercial | 26.83 | 80.91 |
6 | Khadra | Residential | 26.88 | 80.91 | 38 | Aminabad | Commercial | 26.84 | 80.92 |
7 | Purania | Residential | 26.90 | 80.94 | 39 | Residency | Commercial | 26.86 | 80.95 |
8 | Kapoorthala | Residential | 26.88 | 80.94 | 40 | Nishatganj | Commercial | 26.83 | 80.90 |
9 | Jankipuram | Residential | 26.92 | 80.95 | 41 | Sikandarbagh/Nbri | Commercial | 26.86 | 80.95 |
10 | Up RSAC | Residential | 26.91 | 80.96 | 42 | Hazaratganj | Commercial | 26.86 | 80.95 |
11 | Balaganj | Residential | 26.88 | 80.88 | 43 | Vidhansabha | Commercial | 26.84 | 80.94 |
12 | Thakurganj | Residential | 26.88 | 80.89 | 44 | Daliganj | Commercial | 26.87 | 80.93 |
13 | Wazirganj | Residential | 26.85 | 80.92 | 45 | Hussainganj | Commercial | 26.84 | 80.93 |
14 | Gomatinagar | Residential | 26.86 | 81.02 | 46 | Chowk | Commercial | 26.86 | 80.90 |
15 | Vipulkhand | Residential | 26.84 | 80.99 | 47 | Bara Imambara | Commercial | 26.87 | 80.91 |
16 | Indiranagar | Residential | 26.88 | 80.99 | 48 | Yahiyaganj | Commercial | 26.86 | 80.91 |
17 | Mahanagar | Residential | 26.88 | 81.00 | 49 | Patrakarpuram | Commercial | 26.85 | 81.00 |
18 | Omax City | Residential | 26.76 | 80.92 | 50 | Lekhraj Market | Commercial | 26.87 | 80.97 |
19 | Golf City | Residential | 26.79 | 81.04 | 51 | Hal | Commercial | 26.87 | 80.99 |
20 | Rajajipuram | Residential | 26.85 | 80.88 | 52 | Bbau | Commercial | 26.77 | 80.92 |
21 | Ashiyana | Residential | 26.80 | 80.92 | 53 | Gole Market | Commercial | 26.87 | 80.96 |
22 | Vikas Nagar | Residential | 26.90 | 80.96 | 54 | Dubbagga | Commercial | 26.87 | 80.86 |
23 | Uthretiya | Residential | 26.79 | 80.92 | 55 | Amausi | Industrial | 26.76 | 80.87 |
24 | Kukrail | Park | 26.91 | 80.98 | 56 | Chinhat | Industrial | 26.88 | 81.04 |
25 | Janeshwar Mishra Park | Park | 26.84 | 81.00 | 57 | Sarojini Nagar | Industrial | 26.75 | 80.86 |
26 | Nimbu Park | Park | 26.87 | 80.91 | 58 | Talkatora | Industrial | 26.83 | 80.89 |
27 | Hathi Park | Park | 26.87 | 80.92 | 59 | Chabagh Station | High-Traffic Zone | 26.83 | 80.92 |
28 | Ramabai Ambedkar Park | Park | 26.76 | 80.92 | 60 | Alambagh Chauraha | High-Traffic Zone | 26.83 | 80.91 |
29 | Lohia Park | Park | 26.85 | 80.98 | 61 | Kaiserbagh | High-Traffic Zone | 26.86 | 80.92 |
30 | Ambedkar Park | Park | 26.85 | 80.98 | 62 | Polytechnique Chauraha | High-Traffic Zone | 26.87 | 81.00 |
31 | Zoo | Park | 26.85 | 80.95 | 63 | Barlington Chauraha | High-Traffic Zone | 26.84 | 80.94 |
32 | Kanshiram Eco Garden | Park | 26.81 | 80.92 | 64 | Engineering College Chauraha | High-Traffic Zone | 26.91 | 80.94 |
Pollution Index (PI) | Classification | Integrated Pollution Index (IPI) | Classification | Ecological Risk Factor (Er) | Classification | PER | Classification |
---|---|---|---|---|---|---|---|
PI ≤ 1 | Low pollution level | IPI ≤ 1 | Low level of pollution | Er < 40 | Low risk | PER < 150 | Low risk |
1 ≤ PI ≤ 3 | Moderate pollution level | 1 < IPI ≤ 2 | Moderate level of pollution | 40 ≤ Er < 80 | Moderate risk | 150 ≤ PER < 300 | Moderate risk |
2 < IPI > 5 | High level of pollution | 80 ≤ Er < 160 | Considerable risk | 300 ≤ PER < 600 | Considerable risk | ||
PI ≥ 3 | High pollution level | IPI > 5 | Extremely high level of pollution | 160 ≤ Er < 320 | High risk | PER > 600 | High risk |
Er > 320 | Very high risk |
Parameter | Definition | Unit | Value | |
---|---|---|---|---|
Children | Adult | |||
C | Concentration of metal | mg·kg−1 | - | - |
IngR | Ingestion rate | mg·day−1 | 100 | 200 |
EF | Exposure frequency | days·year−1 | 350 | 350 |
ED | Exposure duration | years | 6 | 24 |
BW | Body weight | kg | 16.2 | 61.8 |
AT | Average time (non-carcinogenic) | days | ED × 365 | ED × 365 |
InhR | Inhalation rate | m3·day−1 | 72 × 365 | 72 × 365 |
PEF | Particle emission factor | m3·kg−1 | 7.6 | 20 |
SA | Exposed skin area | cm2 | 1.36 × 109 | 1.36 × 109 |
SL | Skin adherence factor | mg·cm−2·day−1 | 2800 | 5700 |
ABS | Dermal absorption factor | - | 0.20 | 0.07 |
Heavy Metals | Toxic Response Factors | Reference Dose (RfD, mg·kg−1·day−1) | Cancer Slope Factor (CSF, mg·kg−1·day−1) |
---|---|---|---|
Fe | - | 0.7 | - |
Mn | 1 | 0.014 | - |
Zn | 1 | 0.3 | - |
Cu | 5 | 0.04 | - |
Pb | 5 | 0.035 | - |
Cd | 30 | 0.001 | 15 |
As | 10 | 0.003 | 1.5 |
Cr | 2 | 0.003 | 0.5 |
Ni | 5 | 0.02 | 0.91 |
Functional Areas | Fe | Mn | Zn | Cu | Pb | Cd | As | Cr | Ni | |
---|---|---|---|---|---|---|---|---|---|---|
Residential (N = 23) | Average ± SD | 9620.07 ± 3317 | 297.12 ± 66.23 | 162.92 ± 49.53 | 113.57 ± 14.46 | 60.54 ± 16.17 | 0.89 ± 0.06 | 6.94 ± 1.12 | 45.22 ± 110.93 | 37.92 ± 13.63 |
Range | 5100.00–16235.50 | 202.36–425.25 | 85.52–312.25 | 90.15–145.50 | 34.40–90.56 | 0.81–1.00 | 5.01–8.78 | 25.52–65.98 | 15.15–60.85 | |
Commercial (N = 19) | Average ± SD | 13,042.19 ± 47,673 | 44.05 ± 109.48 | 226.74 ± 114.16 | 132.78 ± 22.33 | 93.28 ± 21.19 | 1.24 ± 0.13 | 7.98 ± 1.26 | 63.44 ± 14.78 | 43.89 ± 11.88 |
Range | 5153.45–25,458.85 | 202.02–550.45 | 115.23–485.45 | 97.20–170.15 | 55.85–140.45 | 1.05–1.56 | 5.59–9.89 | 36.85–92.48 | 30.24–70.25 | |
High traffic (N = 06) | Average ± SD | 17,432.90 ± 4152.02 | 406.97 ± 87.56 | 332.91 ± 74.06 | 151.13 ± 12.19 | 117.32 ± 13.70 | 1.33 ± 0.10 | 8.91 ± 1.32 | 82.53 ± 9.73 | 55.35 ± 7.61 |
Range | 10,657.32–22,625.25 | 330.20–550.50 | 215.55–400.45 | 139.85–165.45 | 100.22–130.45 | 1.20–1.45 | 7.21–11.25 | 68.62–95.12 | 45.45–65.11 | |
Parks (N = 12) | Average ± SD | 10,671.28 ± 3027.68 | 300.94 ± 32.11 | 186.83 ± 19.97 | 119.37 ± 8.86 | 61.60 ± 10.62 | 0.96 ± 0.31 | 7.02 ± 1.32 | 42.49 ± 10.84 | 40.09 ± 5.79 |
Range | 5556.42–15,200.32 | 245.52–350.45 | 155.33–220.45 | 112.45–145.20 | 51.36–90.15 | 0.12–1.15 | 5.31–9.21 | 25.52–65.48 | 32.50–51.50 | |
Industrial (N = 04) | Average ± SD | 24,326.21 ± 1745.78 | 444.62 ± 118.78 | 412.93 ± 161.17 | 155.39 ± 18.01 | 117.15 ± 11.13 | 1.64 ± 0.08 | 11.36 ± 0.89 | 160.72 ± 13.45 | 77.58 ± 8.44 |
Range | 22,425.82–26,258.40 | 315.55–565.32 | 215.50–594.23 | 135.85–175.12 | 105.66–130.22 | 1.56–1.75 | 10.29–12.39 | 140.78–170.17 | 65.55–85.15 |
City (Country) and Recommended Body | Fe | Mn | Zn | Cu | Pb | Cd | As | Cr | Ni | Reference |
---|---|---|---|---|---|---|---|---|---|---|
Lucknow, India | 16,368.15 | 374.15 | 289.85 | 139.66 | 97.34 | 1.29 | 8.82 | 87.29 | 54.23 | Present study |
Delhi, India | 27047 | 699.2 | 263.7 | 168.7 | 128.7 | - | - | 170.8 | 37.2 | Rajaram et al. [1] |
Dhanbad, India | 67,700 | 1500 | 224 | 53.6 | 128 | - | 17.5 | 45.2 | 22 | Masto et al. [35] |
Kolkata, India | 40,334 | 743 | 289 | 92 | 128 | - | - | 164 | 36 | Kolakkandi et al. [36] |
Dehradun, India | 12,509.51 | 315.58 | 217.10 | 80.41 | 138.77 | - | 4.40 | 46.75 | 35.38 | Bisht et al. [3] |
Xi’an, China | - | 337.6 | 169.2 | 46.6 | 97.4 | - | - | 177.5 | 29.3 | Lu et al. [50] |
Dhaka (Bangladesh) | - | 261.53 | 239.1 | 49.8 | 18.9 | 11.6 | 8.1 | 144.3 | 37.1 | Rehman et al. [18] |
Dezful (Iran) | - | - | 224 | 51 | 54 | 0.4 | 3 | 44 | 46 | Sadeghdoust et al. [32] |
Lahore (Pakistan) | - | - | 1053 | 116 | 230 | 5.17 | 7.51 | 194 | 53.6 | Rehman et al. [13] |
Kabul (Afghanistan) | - | 252.95 | 122.51 | 43.63 | 28.69 | 1.16 | - | 38.40 | 66.41 | Jadoon et al. [30] |
Concentration in Indian natural soil | 30,890 | 527 | 22.1 | 56.5 | 13.1 | 0.90 | - | 114 | 27.7 | Kuhad et al. [39] and Gowd et al. [40] |
Continental upper crust | 32,015 | 209 | 52 | 14.3 | 17 | 0.102 | 2.0 | 35 | 18.6 | Wedepohl [52] |
Parameters | PC1 | PC2 | PC3 |
---|---|---|---|
Fe | 0.384 | 0.715 | 0.319 |
Mn | 0.709 | 0.547 | 0.019 |
Zn | 0.661 | 0.551 | 0.322 |
Cu | 0.841 | 0.360 | 0.251 |
Pb | 0.838 | 0.257 | 0.411 |
Cd | 0.513 | 0.294 | 0.643 |
As | 0.132 | 0.213 | 0.901 |
Cr | 0.387 | 0.621 | 0.592 |
Ni | 0.321 | 0.808 | 0.271 |
Eigen Value | 3.029 | 2.480 | 2.089 |
% of Variance | 33.661 | 27.550 | 23.208 |
Cumulative % | 33.661 | 61.211 | 84.419 |
Heavy Metals | Type of Exposure | Different Functional Areas | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Residential | Commercial | High-Traffic Areas | Parks | Industrial | |||||||
Children | Adults | Children | Adults | Children | Adults | Children | Adults | Children | Adults | ||
Fe | HQIngestion | 0.176 | 0.0188 | 0.238 | 0.0255 | 0.318 | 0.0341 | 0.195 | 0.0209 | 0.444 | 0.0476 |
HQInhalation | 0.00000491 | 0.00000277 | 0.00000666 | 0.00000375 | 0.00000890 | 0.00000502 | 0.00000545 | 0.00000307 | 0.0000124 | 0.00000700 | |
HQDermal | 0.000492 | 0.00000751 | 0.000667 | 0.000102 | 0.000892 | 0.000136 | 0.000546 | 0.0000833 | 0.00124 | 0.000190 | |
HI | 0.176 | 0.0189 | 0.239 | 0.0256 | 0.319 | 0.0343 | 0.195 | 0.0210 | 0.446 | 0.0478 | |
Mn | HQIngestion | 0.271 | 0.0291 | 0.314 | 0.0337 | 0.372 | 0.0398 | 0.275 | 0.0294 | 0.406 | 0.0435 |
HQInhalation | 0.00000758 | 0.00000428 | 0.00000878 | 0.00000495 | 0.0000104 | 0.00000586 | 0.00000768 | 0.00000433 | 0.0000113 | 0.00000640 | |
HQDermal | 0.000760 | 0.000116 | 0.000880 | 0.000134 | 0.00104 | 0.000159 | 0.000770 | 0.000117 | 0.00114 | 0.000174 | |
HI | 0.272 | 0.0292 | 0.315 | 0.0338 | 0.373 | 0.0400 | 0.276 | 0.0296 | 0.407 | 0.0437 | |
Zn | HQIngestion | 0.00694 | 0.000744 | 0.00966 | 0.00104 | 0.0142 | 0.00152 | 7960.00 | 0.000853 | 0.0176 | 0.00189 |
HQInhalation | 0.000000194 | 0.000000109 | 0.000000270 | 0.000000152 | 0.000000396 | 0.000000224 | 0.000000222 | 0.000000125 | 0.000000492 | 0.000000277 | |
HQDermal | 0.0000194 | 0.00000297 | 0.0000271 | 0.00000413 | 0.0000397 | 0.00000607 | 0.0000223 | 0.00000340 | 0.0000493 | 0.00000752 | |
HI | 0.00696 | 0.000747 | 0.00969 | 0.00104 | 0.0142 | 0.00152 | 0.00798 | 0.000857 | 0.0176 | 0.00189 | |
Cu | HQIngestion | 0.0363 | 0.00389 | 0.0424 | 0.00455 | 0.0483 | 0.00518 | 0.0382 | 0.00409 | 0.0497 | 0.00532 |
HQInhalation | 0.00000101 | 0.000000572 | 0.00000119 | 0.000000669 | 0.00000135 | 0.000000761 | 0.00000107 | 0.000000601 | 0.00000139 | 0.000000783 | |
HQDermal | 0.000102 | 0.0000155 | 0.000119 | 0.0000181 | 0.000135 | 0.0000207 | 0.000107 | 0.0000163 | 0.000139 | 0.0000212 | |
HI | 0.0364 | 0.00391 | 0.0426 | 0.00457 | 0.0484 | 0.00520 | 0.0383 | 0.00410 | 0.0498 | 0.00534 | |
Pb | HQIngestion | 0.221 | 0.0237 | 0.341 | 0.0365 | 0.429 | 0.0459 | 0.225 | 0.0241 | 0.428 | 0.0459 |
HQInhalation | 0.00000618 | 0.00000348 | 0.00000952 | 0.00000537 | 0.0000120 | 0.00000675 | 0.00000629 | 0.00000355 | 0.0000120 | 0.00000674 | |
HQDermal | 0.000619 | 0.0000945 | 0.000954 | 0.000146 | 0.00120 | 0.000183 | 0.000630 | 0.0000962 | 0.00120 | 0.000183 | |
HI | 0.222 | 0.0238 | 0.342 | 0.0367 | 0.430 | 0.0461 | 0.226 | 0.0242 | 0.429 | 0.0460 | |
Cd | HQIngestion | 0.0114 | 0.00122 | 0.0158 | 0.00170 | 0.0170 | 0.00182 | 0.0122 | 0.00131 | 0.0209 | 0.00224 |
HQInhalation | 0.000000318 | 0.000000179 | 0.000000442 | 0.000000250 | 0.000000475 | 0.000000268 | 0.000000342 | 0.000000193 | 0.000000585 | 0.000000330 | |
HQDermal | 0.0000319 | 0.00000487 | 0.0000443 | 0.00000677 | 0.0000476 | 0.00000726 | 0.0000343 | 0.00000524 | 0.0000586 | 0.00000895 | |
HI | 0.0114 | 0.00123 | 0.0159 | 0.00170 | 0.0170 | 0.00183 | 0.0123 | 0.00132 | 0.0210 | 0.00225 | |
As | HQIngestion | 0.0385 | 0.00413 | 0.0340 | 0.00364 | 0.0380 | 0.00407 | 0.0299 | 0.00321 | 0.0484 | 0.00518 |
HQInhalation | 0.00000108 | 0.000000607 | 0.000000950 | 0.000000536 | 0.00000106 | 0.000000598 | 0.000000836 | 0.000000472 | 0.00000135 | 0.000000762 | |
HQDermal | 0.000108 | 0.0000165 | 0.0000952 | 0.0000145 | 0.000106 | 0.0000162 | 0.0000838 | 0.0000128 | 0.000135 | 0.0000207 | |
HI | 0.0386 | 0.00414 | 0.0341 | 0.00366 | 0.0381 | 0.00408 | 0.0300 | 0.00322 | 0.0485 | 0.00521 | |
Cr | HQIngestion | 0.120 | 0.0128 | 0.162 | 0.0174 | 0.211 | 0.0226 | 0.109 | 0.0116 | 0.411 | 0.0440 |
HQInhalation | 0.00000335 | 0.00000189 | 0.00000453 | 0.00000256 | 0.00000590 | 0.00000333 | 0.00000304 | 0.00000171 | 0.0000115 | 0.00000648 | |
HQDermal | 0.000335 | 0.0000512 | 0.000454 | 0.0000693 | 0.000591 | 0.0000902 | 0.000304 | 0.0000464 | 0.00115 | 0.000176 | |
HI | 0.120 | 0.0129 | 0.163 | 0.0175 | 0.212 | 0.0227 | 0.109 | 0.0117 | 0.412 | 0.0442 | |
Ni | HQIngestion | 0.0242 | 0.00260 | 0.0281 | 0.00301 | 0.0354 | 0.00379 | 0.0256 | 0.00275 | 0.04962 | 0.00531 |
HQInhalation | 0.000000677 | 0.000000382 | 0.000000784 | 0.000000442 | 0.000000989 | 0.000000557 | 0.000000716 | 0.000000404 | 0.00000139 | 0.000000781 | |
HQDermal | 0.0000679 | 0.0000104 | 0.0000786 | 0.00000120 | 0.0000991 | 0.0000151 | 0.0000718 | 0.0000110 | 0.000139 | 0.0000212 | |
HI | 0.0243 | 0.00261 | 0.0281 | 0.00302 | 0.0355 | 0.00381 | 0.0257 | 0.00276 | 0.0497 | 0.00534 | |
Cumulative HI | 0.896 | 0.0962 | 1.17 | 0.126 | 1.47 | 0.158 | 0.908 | 0.0974 | 1.86 | 0.199 |
Heavy Metals | Type of Exposure | Different Functional Areas | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Residential | Commercial | High-Traffic Areas | Parks | Industrial | |||||||
Children | Adults | Children | Adults | Children | Adults | Children | Adults | Children | Adults | ||
Cd | CRIngestion | 0.0000146 | 0.00000628 | 0.0000204 | 0.00000873 | 0.0000218 | 0.00000936 | 0.0000157 | 0.00000675 | 0.0000269 | 0.0000115 |
CRInhalation | 0.000000000409 | 0.000000000923 | 0.000000000569 | 0.00000000128 | 0.000000000610 | 0.00000000138 | 0.000000000440 | 0.000000000990 | 0.000000000752 | 0.00000000170 | |
CRDermal | 0.000000410 | 0.0000000250 | 0.0000000570 | 0.0000000348 | 0.0000000611 | 0.0000000373 | 0.0000000441 | 0.0000000269 | 0.0000000754 | 0.0000000460 | |
LCR | 0.0000147 | 0.00000630 | 0.0000204 | 0.00000876 | 0.0000219 | 0.00000940 | 0.0000158 | 0.00000678 | 0.0000270 | 0.0000116 | |
As | CRIngestion | 0.00000380 | 0.00000163 | 0.00000437 | 0.00000187 | 0.00000488 | 0.00000209 | 0.00000385 | 0.00000165 | 0.00000622 | 0.00000267 |
CRInhalation | 0.000000000106 | 0.000000000240 | 0.000000000122 | 0.000000000276 | 0.000000000136 | 0.000000000308 | 0.000000000108 | 0.000000000243 | 0.000000000174 | 0.000000000382 | |
CRDermal | 0.0000000106 | 0.00000000650 | 0.0000000122 | 0.00000000748 | 0.0000000137 | 0.00000000835 | 0.0000000108 | 0.00000000658 | 0.0000000174 | 0.0000000106 | |
LCR | 0.00000381 | 0.00000164 | 0.00000438 | 0.00000188 | 0.00000489 | 0.00000210 | 0.00000386 | 0.00000166 | 0.00000624 | 0.00000268 | |
Cr | CRIngestion | 0.0000451 | 0.0000193 | 0.0000633 | 0.0000271 | 0.0000823 | 0.0000353 | 0.0000424 | 0.0000182 | 0.000160 | 0.0000687 |
CRInhalation | 0.00000000126 | 0.00000000284 | 0.00000000177 | 0.00000000399 | 0.00000000230 | 0.00000000519 | 0.00000000118 | 0.00000000267 | 0.00000000448 | 0.0000000101 | |
CRDermal | 0.000000126 | 0.0000000771 | 0.000000177 | 0.000000108 | 0.000000230 | 0.000000141 | 0.000000119 | 0.0000000725 | 0.000000449 | 0.000000274 | |
LCR | 0.0000452 | 0.0000194 | 0.0000634 | 0.0000272 | 0.0000825 | 0.0000354 | 0.0000425 | 0.0000182 | 0.000161 | 0.0000690 | |
Ni | CRIngestion | 0.0000623 | 0.0000267 | 0.0000721 | 0.0000309 | 0.0000910 | 0.0000390 | 0.0000659 | 0.0000282 | 0.000128 | 0.0000547 |
CRInhalation | 0.00000000174 | 0.00000000393 | 0.00000000202 | 0.00000000455 | 0.00000000254 | 0.00000000573 | 0.00000000184 | 0.00000000415 | 0.00000000356 | 0.00000000804 | |
CRDermal | 0.000000175 | 0.000000107 | 0.000000202 | 0.000000123 | 0.000000255 | 0.000000156 | 0.000000185 | 0.000000113 | 0.000000357 | 0.000000218 | |
LCR | 0.0000625 | 0.0000268 | 0.0000723 | 0.0000310 | 0.0000912 | 0.0000392 | 0.0000661 | 0.0000284 | 0.000128 | 0.0000549 | |
Cumulative LCR | 0.000126 | 0.0000541 | 0.000160 | 0.0000688 | 0.000200 | 0.0000861 | 0.000128 | 0.0000550 | 0.000322 | 0.000138 |
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Gupta, V.; Bisht, L.; Arya, A.K.; Singh, A.P.; Gautam, S. Spatially Resolved Distribution, Sources, Exposure Levels, and Health Risks of Heavy Metals in <63 μm Size-Fractionated Road Dust from Lucknow City, North India. Int. J. Environ. Res. Public Health 2022, 19, 12898. https://doi.org/10.3390/ijerph191912898
Gupta V, Bisht L, Arya AK, Singh AP, Gautam S. Spatially Resolved Distribution, Sources, Exposure Levels, and Health Risks of Heavy Metals in <63 μm Size-Fractionated Road Dust from Lucknow City, North India. International Journal of Environmental Research and Public Health. 2022; 19(19):12898. https://doi.org/10.3390/ijerph191912898
Chicago/Turabian StyleGupta, Vidhu, Lalita Bisht, Ajay Kumar Arya, Ajay Pratap Singh, and Sneha Gautam. 2022. "Spatially Resolved Distribution, Sources, Exposure Levels, and Health Risks of Heavy Metals in <63 μm Size-Fractionated Road Dust from Lucknow City, North India" International Journal of Environmental Research and Public Health 19, no. 19: 12898. https://doi.org/10.3390/ijerph191912898