Mobilisation and attenuation of boron during coal mine rehabilitation, Wangaloa, New Zealand
| Autor: | Cathy Rufaut, Laura Haffert, Andrea Todd, D. Craw |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Environmental Engineering
Gypsum Mineralogy chemistry.chemical_element Fresh Water engineering.material Colemanite Magnoliopsida Waste Management Water Supply Water Movements Environmental Chemistry Coal Water pollution Boron Waste Management and Disposal business.industry Coal mining Pollution Coal Mining Plant Leaves Zinc chemistry Environmental chemistry engineering Pyrite business Groundwater Geology Copper Water Pollutants Chemical Environmental Monitoring New Zealand |
| Zdroj: | The Science of the total environment. 368(2-3) |
| ISSN: | 0048-9697 |
| Popis: | Environmental mobility and fate of boron has been traced from source to discharge waters through the rehabilitated Wangaloa coal mine in southern New Zealand. The boron is derived initially from coal, which has up to 450 mg/kg B. The coal also contains pyrite (2-5 wt.% S), which oxidizes to yield a low-pH environment (typical pH 2-5). Weathering of coal-bearing waste rock liberates B into rainwater that infiltrates into waste rock or evaporates to leave a gypsum crust enriched in B, possibly as boric acid or colemanite as inferred from geochemical modelling. Surface waters dissolve this evaporative material periodically, yielding total B concentrations up to 6 mg/L, at pH |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect