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CORRELATIONS BETWEEN HEAVY METALS AND SUSPENDED SOLIDS IN HIGHWAY RUNOFF: IMPLICATIONS FOR CONTROL STRATEGIES.
| 题名： | CORRELATIONS BETWEEN HEAVY METALS AND SUSPENDED SOLIDS IN HIGHWAY RUNOFF: IMPLICATIONS FOR CONTROL STRATEGIES. |
| 作者： | Sansalone-JJ; Buchberger-SG; Koechling-MT |
| 关键词： | RUNOFF-; STORMWATER-; URBAN-HIGHWAYS; WATER-QUALITY; POLLUTANTS-; HEAVY-METALS; SUSPENDED-SEDIMENTS; MICRO-ORGANICS; OILS-; CHLORIDES-; REMOVAL-; PARTIAL-EXFILTRATION-TRENCHES; SNOW-; RAINFALL- |
| 摘要： | Stormwater runoff from heavily travelled urban highways can adversely affect the quality of receiving waters. Nonpoint pollutants in highway runoff include heavy metals, suspended solids, micro-organics, oils and chlorides. These anthropogenic pollutants result from traffic activities, atmospheric deposition, engine exhaust, roadway degradation and highway maintenance. An effective control strategy for trapping runoff pollutants, especially heavy metals and suspended solids, is a partial exfiltration trench (PET). A PET is an engineered trench designed to exfiltrate some of the runoff captured during "first-flush" periods or long duration hydrographs. Narrow PETs installed outside the travelled pavement serve as multipurpose replacements for underdrains and can be located in restricted rights-of-way where space constraints preclude other pollutant control options. The hypothesis that heavy metal concentrations are significantly correlated to suspended solids in highway runoff is investigated in this paper. Runoff data from eight highway sites in the United States and Europe are analyzed to test this hypothesis. Results indicate a strong positive correlation between heavy metals and suspended solids for snow washoff events and a weaker positive correlation for rainfall events. Similar results are observed for correlations between heavy metals and suspended solid particle sizes. It is argued that a PET holds promise as an effective device for immobilizing heavy metals and trapping suspended solids generated during snow washoff, pavement "first-flush" and long duration rainfall events. |
| 总页数： | Transportation Research Record. 1995. (1483) pp112-119 (4 Fig., 5 Tab., 20 Ref.) |
| 报告类型： | 科技报告 |
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