Quantifying Grain-Size Variability of Metal Pollutants in Road-Deposited Sediments Using the Coefficient of Variation
Abstract
:1. Introduction
2. Materials and Methods
2.1. Data Sources and Study Sites
2.2. Analytical Methods and Quality Control
2.3. Estimation of the Heavy Metal Loads in the RDS Samples
2.4. Quantification of Grain-Size Class Variability in RDS
3. Results
3.1. Grain-Size Class Variability in Terms of the Amounts or Mass Percentage Present
3.2. Grain-Size Class Variability in Terms of the Metal Concentrations Present
3.3. Grain-Size Class Variability in Terms of the Metal Loads Present
3.4. Grain-Size Class Variability in Terms of the GSFLoad Present
4. Discussion
4.1. Impact of Grain-Size Class Variability on Quantification of RDS Washoff Loads
4.2. Comparison of Different Measures Used to Quantify Grain-Size Class Variability
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Study Site | Central Urban Area (UCA) | Central Suburban County Area (CSA) | Rural Town Area (RTA) | Rural Village Area (RVA) | Urban Village Area (UVA) |
---|---|---|---|---|---|
Areas containing main roads (R1) | 11 | 40 | 20 | 20 | 6 |
Residential areas (R2) | 8 | 18 | 20 | 20 | 4 |
Particle Size (μm) | Cr | Cu | Ni | Pb | Zn | |||||
---|---|---|---|---|---|---|---|---|---|---|
Cv | Lc | Cv | Lc | Cv | Lc | Cv | Lc | Cv | Lc | |
<44 | 33.3 | 0.183 | 53.8 | 0.286 | 33.3 | 0.178 | 36.5 | 0.197 | 47.6 | 0.252 |
44–62 | 35.6 | 0.190 | 58.2 | 0.310 | 38.8 | 0.212 | 34.8 | 0.188 | 50.9 | 0.271 |
62–105 | 40.1 | 0.218 | 69.8 | 0.356 | 51.1 | 0.267 | 35.0 | 0188 | 49.0 | 0.262 |
105–149 | 40.1 | 0.221 | 81.8 | 0.412 | 52.4 | 0.268 | 32.9 | 0.180 | 50.1 | 0.277 |
149–250 | 48.9 | 0.270 | 97.7 | 0.475 | 70.0 | 0.367 | 41.6 | 0.207 | 53.1 | 0.298 |
250–450 | 61.8 | 0.320 | 106.9 | 0.442 | 76.0 | 0.396 | 39.1 | 0.211 | 81.8 | 0.380 |
450–1000 | 86.8 | 0.375 | 59.3 | 0.320 | 95.0 | 0.465 | 92.8 | 0.370 | 122.0 | 0.468 |
1000–2000 | 90.0 | 0.401 | 84.32 | 0.386 | 114.4 | 0.514 | 90.9 | 0.359 | 127.8 | 0.557 |
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Zhao, H.; Wang, X.; Li, X. Quantifying Grain-Size Variability of Metal Pollutants in Road-Deposited Sediments Using the Coefficient of Variation. Int. J. Environ. Res. Public Health 2017, 14, 850. https://doi.org/10.3390/ijerph14080850
Zhao H, Wang X, Li X. Quantifying Grain-Size Variability of Metal Pollutants in Road-Deposited Sediments Using the Coefficient of Variation. International Journal of Environmental Research and Public Health. 2017; 14(8):850. https://doi.org/10.3390/ijerph14080850
Chicago/Turabian StyleZhao, Hongtao, Xiaoxue Wang, and Xuyong Li. 2017. "Quantifying Grain-Size Variability of Metal Pollutants in Road-Deposited Sediments Using the Coefficient of Variation" International Journal of Environmental Research and Public Health 14, no. 8: 850. https://doi.org/10.3390/ijerph14080850