Difference between revisions of "Summary of pollutant removal mechanisms"
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<tr> | <tr> | ||
<td>Sedimentation</td> | <td>Sedimentation</td> | ||
| − | <td></td> | + | <td>Solids, BOD, pathogens, particulate COD, P, N, metals, synthetic organics</td> |
| − | <td></td> | + | <td>Low turbulence</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Filtration</td> | <td>Filtration</td> | ||
| − | <td></td> | + | <td>Solids, BOD, pathogens, particulate COD, P, N, metals, synthetic organics</td> |
| − | <td></td> | + | <td>Fine, dense herbaceous plants, constructed filters</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Soil incorporation</td> | <td>Soil incorporation</td> | ||
| − | <td></td> | + | <td>All</td> |
| − | <td></td> | + | <td>Medium-fine texture</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Precipitation</td> | <td>Precipitation</td> | ||
| − | <td></td> | + | <td>Dissolved P, metals</td> |
| − | <td></td> | + | <td>High alkalinity</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Sorption - adsorption</td> | <td>Sorption - adsorption</td> | ||
| − | <td></td> | + | <td>Dissolved P, metals, synthetic organics</td> |
| − | <td></td> | + | <td>High soil Al, Fe, high soil organics (Met), circumneutral pH</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Sorption - ion exchange</td> | <td>Sorption - ion exchange</td> | ||
| − | <td></td> | + | <td>Dissolved metals</td> |
| − | <td></td> | + | <td>High soil cation exchange capacity</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Oxidation</td> | <td>Oxidation</td> | ||
| − | <td></td> | + | <td>COD, petroleum hydrocarbons, synthetic organics</td> |
| − | <td></td> | + | <td>Aerobic conditions</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Degradation - photolysis</td> | <td>Degradation - photolysis</td> | ||
| − | <td></td> | + | <td>COD, petroleum hydrocarbons, synthetic organics</td> |
| − | <td></td> | + | <td>Direct sunlight</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Degradation - volatilization</td> | <td>Degradation - volatilization</td> | ||
| − | <td></td> | + | <td>Volatile petroleum hydrocarbons, synthetic organics</td> |
| − | <td></td> | + | <td>High temperature and air movement</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Degradation - biological</td> | <td>Degradation - biological</td> | ||
| − | <td></td> | + | <td>BOD, COD, petroleum hydrocarbons, synthetic organics</td> |
| − | <td></td> | + | <td>High temperature and air movement</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Plant metabolism</td> | <td>Plant metabolism</td> | ||
| − | <td></td> | + | <td>P, N, metals</td> |
| − | <td></td> | + | <td>High plant surface area</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Pathogen die off</td> | <td>Pathogen die off</td> | ||
| − | <td></td> | + | <td>Pathogens</td> |
| − | <td></td> | + | <td>Plant excretions</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Nitrification</td> | <td>Nitrification</td> | ||
| − | <td></td> | + | <td>Ammonia</td> |
| − | <td></td> | + | <td>Dissolved oxygen >2 mg/L, low toxicants, temperature >5-7°C, circumneutral pH</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Denitrification</td> | <td>Denitrification</td> | ||
| − | <td></td> | + | <td>Nitrate, nitrite</td> |
| − | <td></td> | + | <td>Anaerobic, low toxicants, temperature >15°C</td> |
</tr> | </tr> | ||
</table> | </table> | ||
<noinclude> | <noinclude> | ||
| − | [[Category: | + | [[Category:Table pollutant information]] |
[[category:table]] | [[category:table]] | ||
</noinclude> | </noinclude> | ||
Revision as of 13:21, 21 May 2015
Summary of attenuation-removal mechanisms for primary pollutants found in stormwater runoff.
Link to this table
| Mechanism | Pollutants affected | Promoted by |
|---|---|---|
| Sedimentation | Solids, BOD, pathogens, particulate COD, P, N, metals, synthetic organics | Low turbulence |
| Filtration | Solids, BOD, pathogens, particulate COD, P, N, metals, synthetic organics | Fine, dense herbaceous plants, constructed filters |
| Soil incorporation | All | Medium-fine texture |
| Precipitation | Dissolved P, metals | High alkalinity |
| Sorption - adsorption | Dissolved P, metals, synthetic organics | High soil Al, Fe, high soil organics (Met), circumneutral pH |
| Sorption - ion exchange | Dissolved metals | High soil cation exchange capacity |
| Oxidation | COD, petroleum hydrocarbons, synthetic organics | Aerobic conditions |
| Degradation - photolysis | COD, petroleum hydrocarbons, synthetic organics | Direct sunlight |
| Degradation - volatilization | Volatile petroleum hydrocarbons, synthetic organics | High temperature and air movement |
| Degradation - biological | BOD, COD, petroleum hydrocarbons, synthetic organics | High temperature and air movement |
| Plant metabolism | P, N, metals | High plant surface area |
| Pathogen die off | Pathogens | Plant excretions |
| Nitrification | Ammonia | Dissolved oxygen >2 mg/L, low toxicants, temperature >5-7°C, circumneutral pH |
| Denitrification | Nitrate, nitrite | Anaerobic, low toxicants, temperature >15°C |