Speciation of some heavy metals in coal fly ash
| Autor: | D. K. Banerjee, Sudesh Chaudhary |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Chemical Health and Safety Fine grain Sulfide Health Toxicology and Mutagenesis media_common.quotation_subject Mineralogy Fraction (chemistry) Heavy metals Toxicology Metal Speciation Adsorption chemistry Fly ash Environmental chemistry visual_art visual_art.visual_art_medium media_common |
| Zdroj: | Chemical Speciation & Bioavailability. 19:95-102 |
| ISSN: | 2047-6523 0954-2299 |
| DOI: | 10.3184/095422907x236100 |
| Popis: | Selected heavy metals Cu, Ni, Zn and Pb were studied in two different types of coal fly ash samples, dyke and field, collected from Badarpur Thermal Power Station, Delhi, India for their total metal concentration as well as geochemical differentiation in different chemical fraction namely exchangeable, easily reducible or Fe-Mn bound, organic or sulfide bound and residual fractions. The total concentration of heavy metals in both types of fly ash samples followed the order Cr>Zn>Pb>Ni>Cu. Among the two types of samples, field fly ash samples were more enriched in these heavy metals compared with the dyke type samples. The fine grain size of field type samples possibly provided the sufficiently large surface area for the adsorption of these metals, resulting in higher concentrations compared with those in the coarse grained dyke samples. But, interestingly, the dyke type fly ash samples contain most of the metals in the exchangeable fraction. Metals in this fraction are easily mobilisable or can be... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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