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http://hdl.handle.net/2080/1533
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| DC Field | Value | Language |
|---|
| contributor.author | Equeenuddin, Sk. Md. | - |
| contributor.author | Kishan, B K | - |
| date.accessioned | 2011-09-06T10:08:27Z | - |
| date.available | 2011-09-06T10:08:27Z | - |
| date.issued | 2011-08 | - |
| identifier.citation | Seminar on Orissa’s Mineral, Environment and Geoscience Assessment, 2011 (OMEGA 2011), 11 - 12 August 2011 | en |
| identifier.uri | http://hdl.handle.net/2080/1533 | - |
| description | Copyright for this paper belongs to proceeding publisher | en |
| description.abstract | There has been growing demand for chromite ores in recent years. In the opencast mines,
the chromite as well as overburden material are dumped in the open ground without
considering the environmental consequences. Hence, further leaching of chromium
causes the environmental degradation in the vicinity of mines. This study is conducted in
and around the chromite mines situated in the Nuasahi-Baula igneous complex for
assessing the Cr pollution. Hexavalent chromium was found between 2 and 6 ppb in
groundwater and 8 to 36 ppb in mine discharges. The total chromium ranged between 2
and 7 ppb in groundwater and 9 to 42 ppb in mine discharge water. The goethite rich
overburden material at chromite mines is an efficient sink for the chromate anion.
Leaching experiments using a saline solution, phosphate solution and tap water showed
that phosphate solution release more hexavalent chromium compared to other two
solutions. These results can be useful in evaluating natural attenuation of fertilizerderived
pollutants in the agricultural land near chromite mines. From the mineralogy it
was found that the lateritic cover contain more goethite compared to other minerals. The
concentration of chromium is more in laterite than overburden and soil. The impact of
chromium on the environment depends on the percentage of chromium in exchangeable
fraction. The study shows that percentage of chromium is less in exchangeable fraction
and more in residual fraction in the study area. So the Cr bioavailability is low and
toxicity is less. | en |
| format.extent | 1461630 bytes | - |
| format.mimetype | application/pdf | - |
| language.iso | en | - |
| subject | chromite | en |
| subject | Nuasahi-Baula | en |
| subject | Hexavalent chromium | en |
| title | Assessment of Chromium Pollution at Nuasahi-Baula Mines, Orissa | en |
| type | Presentation | en |
| Appears in Collections: | Conference Papers
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| File |
Description |
Size | Format |
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| OMEGA 2011.pdf | | 1427Kb | Adobe PDF | View/Open |
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