4 Ife Journal 0f$cience vol. 7, no. 1 (2005) I .. iPHYSICO-CHEMICAL CHARACTERIZATION OF SOME NIGE... more 4 Ife Journal 0f$cience vol. 7, no. 1 (2005) I .. iPHYSICO-CHEMICAL CHARACTERIZATION OF SOME NIGERIAN GOETHITE NIINERAL SA.\IPLES N. ABDUS-SALAM* and FA ADEKOLA Department of Chemistry, University ofllorin, PMB 1515. Ilorin, Kwara State. Nigeria. (Submitted: 12 May 2004; Accepted: 08 January 2005) Abstract The quality of four goethite samples from three geographical locations in Nigeria has been determined. These are Ota-Efun and Oshogbo in the southwest Kontokarifr in the middle belt and Kaduna in the Northem part of \ Nigeria.
Permutation and permutation-inversion (PI) groups for dimer molecules have been extended to accou... more Permutation and permutation-inversion (PI) groups for dimer molecules have been extended to account for the trimers and higher polymers. It is shown that once the operations in the monomer groups are certified feasible, the character table for the polymer groups can easily be constructed. We give some formulae for obtaining the conjugacy classes of the symmetric and non-symmetric polymers.
ABSTRACT This work constitutes the first part of activities being carried out within the context ... more ABSTRACT This work constitutes the first part of activities being carried out within the context of beneficiation of valuable metal ions from a brand of spent mobile phones by leaching process in laboratory scale. The printed circuit board of the mobile phone was employed in this study. The effects of parameters such as acid concentration, particle size and temperature on the leaching efficiency at different time intervals were investigated.
Abstract Adsorption characteristics of Pb and Cd were conducted on a natural goethite from Kaduna... more Abstract Adsorption characteristics of Pb and Cd were conducted on a natural goethite from Kaduna (Niperia) and compared same with a synthetic goethite. The adsorption data was fitted into Langmuir model which gave Langmuir constants k and Xm for Pb and Cd as 4.99 & 2.40 and
Abstract: Investigation has been carried out on the potential of a locally sourced goethite for t... more Abstract: Investigation has been carried out on the potential of a locally sourced goethite for the removal of cadmium ion from aqueous solutions using batch equilibration technique. The maximum uptake of cadmium is 6.4× 10-2 mg/g-goethite. The sorption kinetics appears to be rapid as equilibrium was attained within a period of 1 hour. The highest sorption capacity was obtained for particle size with diameter (phis) 0.09 mm.
ABSTRACT The oil and biodiesel produced from Nigerian and Indian Jatropha curcas seeds were evalu... more ABSTRACT The oil and biodiesel produced from Nigerian and Indian Jatropha curcas seeds were evaluated using a parametric Student's t-test model. The characteristics assessed include oil yield, specific gravity, density, acid value, free fatty acid, iodine value, saponification value, peroxide value, viscosity and flash point. The results revealed significant differences (p< 0.05) between the yield of the Nigerian and Indian Jatropha oils (80% vs 56%).
Abstract Chromatographic fractionation and spectroscopic characterization of a natural African mi... more Abstract Chromatographic fractionation and spectroscopic characterization of a natural African mineral dye have been carried out. The chromatographic separation of the dyes made use of column and thin layer chromatographic techniques. Some physicochemical properties of the dye including solubility in polar and non-polar solvents, pH, ash and organic contents were determined.
The stripping of copper from the organic extract of bis (2, 4, 4-trimethylpentyl) phosphinodithio... more The stripping of copper from the organic extract of bis (2, 4, 4-trimethylpentyl) phosphinodithioic acid, CYANEX® 301, using an aqueous mixture of thiourea, hydrazine and sodium hydroxide has been investigated. The optimal concentrations of the aqueous solution were found to be 1.0 M, 5× 10− 2 M and 5.0 M, respectively which led to 95% stripping of copper from CYANEX 301 with concomitant regeneration of the extractant.
Abstract A detailed physicochemical characterization of columbite and tantalite samples from diff... more Abstract A detailed physicochemical characterization of columbite and tantalite samples from different locations in Nigeria has been undertaken. Parameters such as moisture content, loss of mass on ignition, pH, and the specific gravity of columbite and tantalite samples from different locations were determined and compared.
Abstract Heavy metals are stable and persistence environmental contaminant of marine sediments. T... more Abstract Heavy metals are stable and persistence environmental contaminant of marine sediments. The vast increase in population growth, urbanisation and industrialisation leads to increase in of marine discharges, which results in total loads of pollutants being delivered to the sea. Heavy metal pollution in aquatic environment and subsequent uptake in food chain by aquatic organisms and humans put public health at risks.
ABSTRACT: The dissolution of goethite samples in mineral acids from to extreme parts of Nigeria (... more ABSTRACT: The dissolution of goethite samples in mineral acids from to extreme parts of Nigeria (Osogbo and Kaduna) have been investigated. The rate of dissolution was found to be slightly faster in HCl than HNO3. The higher rate of dissolution in HCl could be attributed to the complexing ability of Clin addition to the H+ effect while lowering effect by NO3 - was attributed to adsorption of NO3 on to the goethite surface. Mononuclear complexes, especially bidentate of oxyanion are found to accelerate dissolution as opposed to binuclear complexes.
Abstract The impact of sunlight on aliphatic and polycyclic aromatic hydrocarbons profiles of Agb... more Abstract The impact of sunlight on aliphatic and polycyclic aromatic hydrocarbons profiles of Agbabu natural bitumen in Nigeria was investigated. The raw flow type of the bitumen was purified and exposed to sunlight for six consecutive months. Different portions of the bitumen were withdrawn at an interval of one month and were separated into aliphatic and polycyclic aromatic hydrocarbon fractions by column chromatography, followed by the GC analyses of various fractions.
ABSTRACT Activated carbon were prepared from coconut shell; coconut coirpith, rice husk, shear bu... more ABSTRACT Activated carbon were prepared from coconut shell; coconut coirpith, rice husk, shear butter wood and shear butter bark using IM Ferric chloride, IM Trioxonitrate (v) acid, IM Orthophosphoric acid and IM Potassium carbonate as the chemical activating reagents. The activated carbons were characterized using micropore volume, bulk density, moisture content and pH. The activated carbons prepared were used for the removal of phenol from aqueous solution.
This work constitutes the first part of activities being carried out within the context of benefi... more This work constitutes the first part of activities being carried out within the context of beneficiation of valuable metals from a brand of spent mobile phones by leaching process in laboratory scale. The printed circuit board of the mobile phone was employed in this study. The effects of parameters such as acid concentration, particle size and temperature on the leaching efficiency at different time intervals were investigated.
In this study, fly ash was obtained from Matla power station and the physicochemical properties i... more In this study, fly ash was obtained from Matla power station and the physicochemical properties investigated. The fly ash was characterized by x-ray fluorescence, x-ray diffraction, scanning electron microscopy, and inductively coupled plasma mass spectrometry. Surface area, particle size, ash and carbon contents, pH, and point of zero charge were also measured. The results showed that the fly ash is alkaline and consists mainly of mullite (Al6Si2O13) and quartz (SiO2).
Abstract Experiments on the kinetics of dissolution of a Nigerian tantalite ore in hydrochloric a... more Abstract Experiments on the kinetics of dissolution of a Nigerian tantalite ore in hydrochloric acid medium have been undertaken. The effects of temperature, acid concentration, stirring rate and particle size on the dissolution rate have been investigated. Physicochemical characterization of this ore, such as moisture content, loss of mass on ignition, pH and the elemental analysis by inductive coupled plasma-mass spectrometry (ICP-MS) was also carried out.
4 Ife Journal 0f$cience vol. 7, no. 1 (2005) I .. iPHYSICO-CHEMICAL CHARACTERIZATION OF SOME NIGE... more 4 Ife Journal 0f$cience vol. 7, no. 1 (2005) I .. iPHYSICO-CHEMICAL CHARACTERIZATION OF SOME NIGERIAN GOETHITE NIINERAL SA.\IPLES N. ABDUS-SALAM* and FA ADEKOLA Department of Chemistry, University ofllorin, PMB 1515. Ilorin, Kwara State. Nigeria. (Submitted: 12 May 2004; Accepted: 08 January 2005) Abstract The quality of four goethite samples from three geographical locations in Nigeria has been determined. These are Ota-Efun and Oshogbo in the southwest Kontokarifr in the middle belt and Kaduna in the Northem part of \ Nigeria.
Permutation and permutation-inversion (PI) groups for dimer molecules have been extended to accou... more Permutation and permutation-inversion (PI) groups for dimer molecules have been extended to account for the trimers and higher polymers. It is shown that once the operations in the monomer groups are certified feasible, the character table for the polymer groups can easily be constructed. We give some formulae for obtaining the conjugacy classes of the symmetric and non-symmetric polymers.
ABSTRACT This work constitutes the first part of activities being carried out within the context ... more ABSTRACT This work constitutes the first part of activities being carried out within the context of beneficiation of valuable metal ions from a brand of spent mobile phones by leaching process in laboratory scale. The printed circuit board of the mobile phone was employed in this study. The effects of parameters such as acid concentration, particle size and temperature on the leaching efficiency at different time intervals were investigated.
Abstract Adsorption characteristics of Pb and Cd were conducted on a natural goethite from Kaduna... more Abstract Adsorption characteristics of Pb and Cd were conducted on a natural goethite from Kaduna (Niperia) and compared same with a synthetic goethite. The adsorption data was fitted into Langmuir model which gave Langmuir constants k and Xm for Pb and Cd as 4.99 & 2.40 and
Abstract: Investigation has been carried out on the potential of a locally sourced goethite for t... more Abstract: Investigation has been carried out on the potential of a locally sourced goethite for the removal of cadmium ion from aqueous solutions using batch equilibration technique. The maximum uptake of cadmium is 6.4× 10-2 mg/g-goethite. The sorption kinetics appears to be rapid as equilibrium was attained within a period of 1 hour. The highest sorption capacity was obtained for particle size with diameter (phis) 0.09 mm.
ABSTRACT The oil and biodiesel produced from Nigerian and Indian Jatropha curcas seeds were evalu... more ABSTRACT The oil and biodiesel produced from Nigerian and Indian Jatropha curcas seeds were evaluated using a parametric Student's t-test model. The characteristics assessed include oil yield, specific gravity, density, acid value, free fatty acid, iodine value, saponification value, peroxide value, viscosity and flash point. The results revealed significant differences (p< 0.05) between the yield of the Nigerian and Indian Jatropha oils (80% vs 56%).
Abstract Chromatographic fractionation and spectroscopic characterization of a natural African mi... more Abstract Chromatographic fractionation and spectroscopic characterization of a natural African mineral dye have been carried out. The chromatographic separation of the dyes made use of column and thin layer chromatographic techniques. Some physicochemical properties of the dye including solubility in polar and non-polar solvents, pH, ash and organic contents were determined.
The stripping of copper from the organic extract of bis (2, 4, 4-trimethylpentyl) phosphinodithio... more The stripping of copper from the organic extract of bis (2, 4, 4-trimethylpentyl) phosphinodithioic acid, CYANEX® 301, using an aqueous mixture of thiourea, hydrazine and sodium hydroxide has been investigated. The optimal concentrations of the aqueous solution were found to be 1.0 M, 5× 10− 2 M and 5.0 M, respectively which led to 95% stripping of copper from CYANEX 301 with concomitant regeneration of the extractant.
Abstract A detailed physicochemical characterization of columbite and tantalite samples from diff... more Abstract A detailed physicochemical characterization of columbite and tantalite samples from different locations in Nigeria has been undertaken. Parameters such as moisture content, loss of mass on ignition, pH, and the specific gravity of columbite and tantalite samples from different locations were determined and compared.
Abstract Heavy metals are stable and persistence environmental contaminant of marine sediments. T... more Abstract Heavy metals are stable and persistence environmental contaminant of marine sediments. The vast increase in population growth, urbanisation and industrialisation leads to increase in of marine discharges, which results in total loads of pollutants being delivered to the sea. Heavy metal pollution in aquatic environment and subsequent uptake in food chain by aquatic organisms and humans put public health at risks.
ABSTRACT: The dissolution of goethite samples in mineral acids from to extreme parts of Nigeria (... more ABSTRACT: The dissolution of goethite samples in mineral acids from to extreme parts of Nigeria (Osogbo and Kaduna) have been investigated. The rate of dissolution was found to be slightly faster in HCl than HNO3. The higher rate of dissolution in HCl could be attributed to the complexing ability of Clin addition to the H+ effect while lowering effect by NO3 - was attributed to adsorption of NO3 on to the goethite surface. Mononuclear complexes, especially bidentate of oxyanion are found to accelerate dissolution as opposed to binuclear complexes.
Abstract The impact of sunlight on aliphatic and polycyclic aromatic hydrocarbons profiles of Agb... more Abstract The impact of sunlight on aliphatic and polycyclic aromatic hydrocarbons profiles of Agbabu natural bitumen in Nigeria was investigated. The raw flow type of the bitumen was purified and exposed to sunlight for six consecutive months. Different portions of the bitumen were withdrawn at an interval of one month and were separated into aliphatic and polycyclic aromatic hydrocarbon fractions by column chromatography, followed by the GC analyses of various fractions.
ABSTRACT Activated carbon were prepared from coconut shell; coconut coirpith, rice husk, shear bu... more ABSTRACT Activated carbon were prepared from coconut shell; coconut coirpith, rice husk, shear butter wood and shear butter bark using IM Ferric chloride, IM Trioxonitrate (v) acid, IM Orthophosphoric acid and IM Potassium carbonate as the chemical activating reagents. The activated carbons were characterized using micropore volume, bulk density, moisture content and pH. The activated carbons prepared were used for the removal of phenol from aqueous solution.
This work constitutes the first part of activities being carried out within the context of benefi... more This work constitutes the first part of activities being carried out within the context of beneficiation of valuable metals from a brand of spent mobile phones by leaching process in laboratory scale. The printed circuit board of the mobile phone was employed in this study. The effects of parameters such as acid concentration, particle size and temperature on the leaching efficiency at different time intervals were investigated.
In this study, fly ash was obtained from Matla power station and the physicochemical properties i... more In this study, fly ash was obtained from Matla power station and the physicochemical properties investigated. The fly ash was characterized by x-ray fluorescence, x-ray diffraction, scanning electron microscopy, and inductively coupled plasma mass spectrometry. Surface area, particle size, ash and carbon contents, pH, and point of zero charge were also measured. The results showed that the fly ash is alkaline and consists mainly of mullite (Al6Si2O13) and quartz (SiO2).
Abstract Experiments on the kinetics of dissolution of a Nigerian tantalite ore in hydrochloric a... more Abstract Experiments on the kinetics of dissolution of a Nigerian tantalite ore in hydrochloric acid medium have been undertaken. The effects of temperature, acid concentration, stirring rate and particle size on the dissolution rate have been investigated. Physicochemical characterization of this ore, such as moisture content, loss of mass on ignition, pH and the elemental analysis by inductive coupled plasma-mass spectrometry (ICP-MS) was also carried out.
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