Desorption of Pb2+ and Cu2+ from Nipa palm (Nypa fruticans Wurmb) biomass

The desorption of Pb2+ and Cu2+ from Nypa frutican Wurmb biomass originally loaded with these two metals in a batch adsorption experiment was investigated using acidic, basic and neutral desorption solutions. The metal-loaded biomass was treated with 0.1 M HCl, 0.1 M NaOH and distilled water atvarying contact time. The data shows that desorption in all the reagent increased with increase in contact time, reaching 75.3 and 63.7% in acid reagent, 18.9 and 14.06% in basic reagent and 3.35 and 2.44% in distilled water for Pb2+ and Cu2+, respectively, at a contact time of 140 min. The desorption kinetic showed that the release constant, kdes, for both metal ion in acidic system was faster (6.3 x 102 and 7. 9 x 102 min-1 for Pb2+ and Cu2+) than other desorption reagents

Removal of Cu (II) and Zn (II) ions from wastewater by cassava (Manihot esculenta Cranz) waste biomass

The ability of cassava waste biomass (untreated and acid treated) to remove heavy metals (Cu(II) and Zn(II) ) from single-ion solution and wastewater was investigated. All experiments were conducted using 10mM solutions of mixed metal ions of CuSO4.5H2O and ZnCl2. The uptake capacities of the two metal ions tested on the untreated and acid treated cassava waste biomass were 71.3 and 85.2 mg/g for Cu(II), and 43.4 and 58.1 mg/g for Zn(II) in single-ion solution. For wastewater, the uptake capacities of untreated and acid treated biomass was found to be 40.1 and 59.7 mg/g for Cu(II), and 38.6 and 38.7 mg/g for Zn(II), respectively. Metal ion uptake capacities in wastewater were lower than in single-ion solution probably due to competition of metal ions of different sizes on available binding sites. Uptake capacities of these metal ions on the biomass surface increased with acid treatment. Equilibrium sorption studies showed that the extent of metal uptake was enhanced by chemically modifying the cassava waste biomass by thiolation. Cassava waste biomass saturated with metal ions shows remarkable ability for metal recovery by dilute acid treatment, and can be used repeatedly for removal of heavy metals in single-ion solution and in wastewater effluents. Key words: Wastewater, bioremediation, heavy metals, biosorption, cassava waste. African Journal of Biotechnology Vol.2(10) 2003: 360-36

Ruptured heterotopic pregnancy: A case report and brief review of the literature

No Abstract. Nigerian Journal of Medicine Vol. 14(3) 2005: 315-31

Evaulation of the Levels of Biogenic Amines in Wines Brewed in Nigeria

No Abstract Available Discovery and Innovation Vol.16(1&2) 2004: 32-3