| Abstract: | Stream water samples were collected over a range of hydrologic and seasonal conditions at three forested watersheds in the northeastern USA. Samples were analyzed for dissolved total mercury (THgd), DOC concentration and DOC composition, and UV254 absorbance across the three sites over different seasons and flow conditions. Pooling data from all sites, we found a strong positive correlation of THgd to DOC (r2 = 0.87), but progressively stronger correlations of THgd with the hydrophobic acid fraction (HPOA) of DOC (r2 = 0.91) and with UV254 absorbance (r2 = 0.92). The strength of the UV254 absorbance-THgd relationship suggests that optical properties associated with dissolved organic matter may be excellent proxies for THgd concentration in these streams. Ease of sample collection and analysis, the potential application of in-situ optical sensors, and the possibility for intensive monitoring over the hydrograph make this an effective, inexpensive approach to estimate THgd flux in drainage waters. ?? 2009 Elsevier Ltd. |
| Genre: | Article |
| ProdID: | 70035018 |
| Citation Author: | Dittman, J. A.; Shanley, J. B.; Driscoll, C. T.; Aiken, G. R.; Chalmers, A. T.; Towse, J. E. |
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| Citation End Page: | 1956 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Pollution |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Ultraviolet absorbance as a proxy for total dissolved mercury in streams; 2009; Article; Journal; Environmental Pollution; Dittman, J. A.; Shanley, J. B.; Driscoll, C. T.; Aiken, G. R.; Chalmers, A. T.; Towse, J. E. |
| Citation Start Page: | 1953 |
| Citation Volume: | 157 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Ultraviolet absorbance as a proxy for total dissolved mercury in streams; 2009; Article; Journal; Environmental Pollution; Dittman, J. A.; Shanley, J. B.; Driscoll, C. T.; Aiken, G. R.; Chalmers, A. T.; Towse, J. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.envpol.2009.01.031 |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
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