Chromium speciation and distribution in the Great Lakes
Beaubien, S; Nriagu, J; Blowes, D; Lawson, G
| HERO ID | 1514285 |
|---|---|
| In Press | No |
| Year | 1994 |
| Title | Chromium speciation and distribution in the Great Lakes |
| Authors | Beaubien, S; Nriagu, J; Blowes, D; Lawson, G |
| Journal | Environmental Science & Technology |
| Volume | 28 |
| Issue | 4 |
| Page Numbers | 730-736 |
| Abstract | BIOSIS COPYRIGHT: BIOL ABS. A technique is described for selectively measuring the forms of chromium in freshwater samples, with detection limits of 21 ng L-1 for Cr(III), 4 ng L-1 for Cr(VI), and 8 ng L-1 for colloidal/organic Cr. Recovery of the Cr(VI) and Cr(III) spikes were consistently > 90%, but only about 70% for the added organic Cr. When the method was applied to samples from Lake Ontario, it was found that Cr(VI) made up 75-85% of the dissolved Cr and that Cr(III) was consistently below the analytical detection limit. About 10% of the dissolved Cr was in the colloidal/organic form. Average concentrations of total dissolved Cr in the epilimnetic waters were found to be 69 ng L-1 in Lake Superior, 136 ng L-1 in Lake Erie, and 351 ng L-1 in Lake Ontario. The increasing concentration of Cr down the Great Lakes watershed reflects the conservative geochemical behavior of Cr(VI) and the increasing input of Cr from industrial and municipal sources. |
| Doi | 10.1021/es00053a029 |
| Pmid | 22196559 |
| Wosid | WOS:A1994ND55000033 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | ECOLOGY; FRESH WATER; MINERALS/ANALYSIS; ENVIRONMENTAL POLLUTANTS/POISONING; OCCUPATIONAL DISEASES; AIR POLLUTION; SOIL POLLUTANTS; WATER POLLUTION; Biochemical Methods-Minerals; Toxicology-Environmental and Industrial Toxicology; Public Health: Environmental Health-Air; 18540-29-9; 16065-83-1; 7440-47-3 |