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| 1 | Occurrence and distribution of metals and porphyrins in Nigerian coal minerals显示文摘The metal contents of Nigerian coal minerals were analyzed using an atomic absorption spectrophotometer. Calcium, Na, and Fe occurred as the major elements with concentrations ranging from 9 782 μg/g for Ca to 432 μg/g for Na whereas K, Mg, Mn, Ni, Cr, Zn, Pb, and Cu, which occurred at trace levels ranged from 673.73 μg/g for Mg to 2.97 μg/g for Mn. The results of the quantitative analysis of porphyrins extracted from the coal minerals showed that Onyeama coal has the highest amount of porphyrins (ca~0.96 μg/g) while Okpara has the lowest (ca~0.30 μg/g). The porphyrins were qualitatively characterized by a combination of thin layer chromatography (TLC), infrared, and ultraviolet-visible spectrophotometers. The results of the mid infrared analysis (MIR) showed the presence of absorption bands at 3 440 cm~1~3 450 cm-1 and 1 640 cm-1~1 680 cm-1 , which are owing to the stretching vibrations of N ─ H and C─ C of aromatics, with C─ H out of plane (oop) bending vibrations at wavenumbers less than 900 cm-1, all of which are characteristic absorptions of porphyrin free base. The ultraviolet-visible data showed prominent peaks at ~400 nm(Soret band) and at wavelength ranges of 535 nm~550 nm(β-band) and 565 nm~ 600 nm (α-band) for the coal porphyrins analyzed. The geochemical significance of the metals and porphyrins in coal minerals are discussed. | OLAJIRE A A AMEEN A B ABDUL-HAMMED M ADEKOLA F A | 2007 | 燃料化学学报2007，35，6： | 4 |
| 2 | A Review on Novel Techniques for Chalcopyrite Ore Processing显示文摘 | Baba A A Ayinla K I Adekola F A | 2012 | International Journal of Mining Engineering and Mineral Processing2012，1，1： | 1 |
| 3 | Sorptive Interaction of Oxyanions with Iron Oxides: A Review 显示文摘 | Adegoke H I Adekola F A Fatoki O S Ximba B J | 2003 | Polish Journal of Environmental Studies2003，22，1： | 1 |
| 4 | Bioleaching of Zn(II)and Pb(II)from Nigerian sphalerite and galena ores by mixed culture of acidophilic bacteria显示文摘 | BABA A A ADEKOLA F A ATATA R F AHMED R N PANDA S | | 0，，： | 1 |
| 5 | Human exposure, biomarkers, and fate of organotins in the environment 显示文摘 | OKORO H K FATOKI O S ADEKOLA F A | 2011 | Reviews of Environmental Contamination and Toxicology2011，213，1： | 1 |
| 6 | Hydrometallurgical processing of a Nigerian sphalerite in hydrochloric acid:Characterization and dissolution kinetics显示文摘 | Baba A A Adekola F A | 2010 | Hydrometallurgy2010，101，1： | 1 |
| 7 | Hydrometallurgical processing of a Nigerian sphalerite in hydrochloric acid characterization and dissolution kinetics显示文摘 | BABA A A ADEKOLA F A | | 0，，1： | 1 |
| 8 | Development of a combined pyro-and hy dro-metallurgical route to treat spent zinc - carbon batteries 显示文摘 | Baba A A Adekola A F Bale R B | 2009 | Journal of Hazardous Materials2009，171，13： | 1 |
| 9 | Re-moval of tributyltin from shipyard process wastewater by flyash, activated carbon and fly ash/activated carbon composite :adsorption models and kinetics 显示文摘 | AYANDA O S FATOKI O S ADEKOLA F A | 2013 | Journal of ChemicalTechnology and Biotechnology2013，88，12： | 1 |
| 10 | Bleaching performance of a nigerian(yola)bentonite显示文摘 | O O James M A Mesubi F A Adekola | 2008 | Latin American Applied Research2008，38，： | 1 |
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