POLLUTION INDICES OF TRACE METALS IN ROADSIDE SOIL

ABSTRACT   Roadside soil samples were obtained from Eka Street, Oron Road, Ikot Ekpene Road and Nwaniba Road within Uyo metropolis, Akwa Ibom State. Roadside soils were also obtained from Uwana Lane and used as Control. These samples and Control were analysed for the concentration of Cadmium (Cd), Nickel (Ni), Lead (Pb), Zinc (Zn) and Iron using Atomic Absorption Spectrophotometer (AAS) unicam 939 model. Results obtained indicated the following mean concentration (mg/kg) for ...

DIRECT SPINNING OF CARBON NANOTUBE FIBRES FROM CHEMICAL VAPOUR SYNTHESIS.

Carbon nanotube, CNT, is a one dimensional sp2 allotrope of carbon with cylindrical nanostructure and high aspect ratio (length in microns and diameter in the nanometer order). They could exist as either single-walled nanotube (SWNT) or Multi-walled nanotube (MWNT), depending on the number of layer(s) present. CNTs drawn into fibres shows outstanding mechanical and electrical properties which give them edge in applications such as composites, electrodes, mechanical actuato...

Studies on heavy metals contents of Osun River at the pre-urban settlement and across Osogbo City, Nigeria

Heavy metals were analysed in Osun River (Nigeria) between 2017 and 2018. Concentrations of the heavy metals were in the increasing order: Fe > Zn > Cu > Mn > Pb > (Ni, Cr) > (Cd, Co). Iron made up 76% of the total heavy metals measured. Activities at Swanlux Farm (a major oil palm farm) seemed to impart on Osun River as the highest Fe concentration (2.55 mg/L) was measured near the farm. In the urban settlement, average zinc concentration was almost double (0.37 mg/L) of that found i...

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Effect of Phosphorus fertilizer on growth and yield of cowpea

                         i.            Abstract Four types of soil are found in Liberia. Latosols of low to medium fertility occur in rolling hill and cover about three-fourths of the total land surface. Shallow, coarse lithosols, in the hilly and rugged terrain, cover about one-eighth of the land. Infertile regosols, or sandy soils, are found along the coastal plain...

ACID RAIN; THE NUISANCE OF VEHICULAR EMISSIONS

ABSTRACT Acid rain is a mixture of sulfuric acid and nitric acids depending upon the relatively quantities of oxides of sulfur and Nitrogen emissions. Theses emissions are from the exhaust pipe or smokestacks of our vehicles and others like power stations, generators, appliances and so on. Acidification of water bodies causes large scale negative impact on aquatic organism including fishes; acidification has an indirect effect on humans. It has effect on the ecosystem and causes ...

HEALTH IMPLICATION ASSOCIATED WITH THE USE OF COSMETICS

Abstract Cosmetics are care product applied to the body or face to improve appearance. The concept of beauty and cosmetics is old as mankind and civilization. Assorted beauty and cosmetics product such as skin care product, fragrance, oral hygiene, and nail product, which may contain toxic chemicals that can be harmful to health are used especially by women. The bioaccumulation of this harmful chemicals and metals in the body overtime has been associated with different signs of i...

In Vitro Evaluation of Metal Chelating and Ferric Reducing Potentials of Methanol Extracts of Adasonia digitata Leaf

ABSTRACTAdansonia digitata L. (Malvaceae) is commonly known as baobab tree native to Africa. Baobab is a multi-purpose tree which offers protection and provides food, clothing and medicine as well as raw material for many useful items. This study aims to elucidate the metal chelating and ferric reducing potentials of methanol extracts of Adansonia digitata L. (Malvaceae) leaf using in vitro model. Phytochemical screening was carried out on the extract and it showed that the extract ...

CHARACTERISATION OF ESSENTIAL OIL FROM LEAVES OF Euphorbia heterophylla AND ITS INSECT REPELLENT POTENTIAL

This study aimed at characterizing essential  oil  from leaves of  E.heterophylla and its insect repellent potential. Essential oil from fresh leaves of  E.heterophylla was extracted by  hydro distillation method, using a  Clevenger apparatus for 4 hours and the  yield was 0.1816%w/w. Repellence  test was conducted by  using 5 cockroaches in number which were  placed in a modified Y-tube Olfactometer and observations recorded for  each an...

PHYTOCHEMICAL ANALYSIS AND ISOLATION OF COMPONENTS OF STEM-BARK OF CHRYSOPHYLLUM ALBIDUM (G.Don)

Chrysophyllum albidum (Sapotaceae) is known to possess bioactive compounds belonging to important phytochemical groups. This work aims at exploring the bioactive constituents of the stem-bark of Chrysophyllum albidum, and further investigating their phytochemical compositions. Stem bark of Chrysophyllum albidum was collected, dried, powdered and extracted with hexane for 13 hours using soxhlet extraction. This was concentrated using a rotary evaporator. Phytochemical screenings of the ext...

COMPARATIVE CHARACTERIZATION OF SOME PORTLAND CEMENTS SOLD IN SOKOTO CITY.

ABSTRACTThe aim of this research was to characterize some Portland cements (Bua, Dangote and Sokoto cement) sold in Sokoto city using standard methods; due to the persistent collapse of buildings. The results showed that Sokoto cement recorded the least CaO content (58.99%) while Dangote cement had the highest CaO content being 61.56%. All the samples have Al2O3, SiO2 and Fe2O3 contents within the acceptable limits with the exception of Dangote with SiO2 content being below the required stand...

Hydrogen;The Fuel for the Future

The usefulness and benefits of hydrogen as a fuel is of no comparison, as it does not contribute to the environmental hazard i.e air pollution caused by other fuels such as methane and petroleum.The end product of hydrogen in fuel cells and combustion engine is energy and water vapor as its only byproduct.

Comparative determination of Calcium and Magnesium in food substances using Atomic absorption spectrophotometry and EDTA Titrimetry

A comparative study was carried out for the determination of calcium and magnesium in milk and water melon (food sources of calcium and magnesium). Mixed standard solutions of calcium and magnesium (spike) were added to the samples before digesting with a mixture of concentrated nitric acid and concentrated hydrochloric acid (1:3). The calcium and magnesium content of the digest were determined using flame atomic absorption spectrophotometer (FAAS) and EDTA titration. The percentage re...

THE CHEMISTRY OF CARBON BLACK

Carbon black is a generic term for a particular form of elemental carbon manufactured by vapour- phase pyrolysis or partial combustion of hydrocarbons. It is the term for an important family of products that is used principally for the reinforcement of rubber, as a black pigment and because of its electrical, conductive properties It does not occur as a natural product (IARC, 2010) and it is one of the most stable compounds (Pilusa & Muzenda, 2013).

NON ENZYMATIC SYNTHESIS OF BIOETHANOL FROM CELLULOSE IN WASTEPAPER MATERIALS.

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