Tag Archives: Metals

The Impact of Rock Crushing On the Quality of Air and Soil Within and Outside the Crushing Site (Published)

This study investigates the effect of rock crushing on Ishiagu environment in Enugu State, Nigeria. The quality of air dust and soil samples within and outside the crushing area was analyzed by taking samples of rock dust), soil and underground water. The amount of iron, zinc, copper, lead, cadmium, chromium and nickel were determined in the rock dust and soil samples collected within and outside the crushing sites. The results indicated that the concentration of metals in all samples were significant ranging from 1425-48180mg/kg in air dust sample, 120-44000mg/kg in soil samples while the metals in the underground water was seen to be decreasing as the distance from the crushing site increased .The underground water samples were observed to have high total dissolved solids (754,587 and 604) ppm respectively, total chloride and total hardness. All underground water samples were in excess of 150 mg/l total chloride with pH values between the ranges of 4.5 to 5.5 which is acidic.

Keywords: Concentration, Metals, Soil, Water, rock, rock dust

Serum Level of Lead, Zinc, Cadmium, Copper and Chromium among Occupationally Exposed Automotive Workers in Benin City (Published)

Aim: This study is aimed at assessing the level of exposure to lead, cadmium, chromium, zinc and copper among occupationally exposed automobile repair workers and create awareness for proper safety measures.Methodology: A total of 94 auto repair workers comprising battery recyclers (n = 14), motor mechanics (n =59) and spray painters (n = 21), selected from various auto repair workshops in Benin City and 50 unexposed controls participated in the study. Blood samples were collected and analysis for blood levels of lead, chromium, cadmium, copper and zinc were done using flame atomic absorption spectrophotometer. Results: Data indicated significantly (p < 0.001) greater levels of lead, cadmium, chromium, zinc and copper in auto mechanics, spray painters and battery recyclers compared with the non-exposed controls. In contrast, the blood levels of these metals did not differ when compared among the auto repair workers. Conclusion: The significantly greater levels of lead, cadmium, chromium, zinc and copper in auto workers clearly demonstrates that auto repair workers are more likely to be exposed to toxicity of metals due to their occupational activities than the general population. This calls for adequate maintenance of safety measures and hygiene by auto repair workers to protect themselves from harmful effects of automobile workshop environment.

 

Keywords: Benin City, Metals, exposed workers, serum

Linear Deformation and the Electronic Properties of Metals (Published)

In this work, the modified structureless pseudopotential model was used to compute and study the effects of deformation on the electron density parameter, Fermi energy, Fermi wave vector and chemical potential of different metals. The structureless pseudopotential model was modified for deformed metals by first computing the electron density parameter of deformed metals under the application of different strains. The results obtained revealed that increase in deformation (strain) causes an increase in electron gas parameter, decrease in Fermi wave vector, Fermi energy and chemical potential of metals. The effect of deformation on electron gas parameter is more pronounced in simple metals than in transition and noble metals. The effect of deformation on Fermi wave vector depends on the elastic properties of the metals. Unlike simple metals, the Fermi energy and chemical potential of transition and noble metals are highly affected by deformation. The results of this work show the versatility of the structureless pseudopotential formalism in computing not only the properties of metals even that of deformed metals.

Keywords: Deformation, Electronic Properties., Metals, Structureless Pseudopotential Formalism

LINEAR DEFORMATION AND THE ELECTRONIC PROPERTIES OF METALS (Review Completed - Accepted)

In this work, the modified structureless pseudopotential model was used to compute and study the effects of deformation on the electron density parameter, Fermi energy, Fermi wave vector and chemical potential of different metals. The structureless pseudopotential model was modified for deformed metals by first computing the electron density parameter of deformed metals under the application of different strains. The results obtained revealed that increase in deformation (strain) causes an increase in electron gas parameter, decrease in Fermi wave vector, Fermi energy and chemical potential of metals. The effect of deformation on electron gas parameter is more pronounced in simple metals than in transition and noble metals. The effect of deformation on Fermi wave vector depends on the elastic properties of the metals. Unlike simple metals, the Fermi energy and chemical potential of transition and noble metals are highly affected by deformation. The results of this work show the versatility of the structureless pseudopotential formalism in computing not only the properties of metals even that of deformed metals

Keywords: Deformation, Electronic Properties., Metals, Structureless Pseudopotential Formalism