JE-VOLUME 03 ISSUE 03 SEPTEMBER 2014


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Volume 3 Issue 3, September 2014

Journal of Environment

ISSN

2049-8373

Publication Frequency

6 Issues per year

Pages

38-50

Publication History


Original Articles

Ecological Risk Assessment of Soil Metallic Pollution in Mechanic Villages, Abeokuta, Nigeria

A.O. Majolagbe, I.I. Alkali and C.T. Onwordi

Pages 38-46


Environmental Friendly Building Materials: Unfired Clay Bricks

Silvia Smeu, Andrei Gal and Cătălin Badea

Pages 47-50



Title

Ecological Risk Assessment of Soil Metallic Pollution in Mechanic Villages, Abeokuta, Nigeria

Abstract

A study on heavy metals load and ecological risk assessment in soil from four automobile villages (MVs): Campsite, Kobape, Obada and Sagamu in Abeokuta, Ogun State, Nigeria was conducted. Soils (top and sub soil) were collected in and around each mechanic village and analyzed for Pb, Cu, Cr, Fe, Cd, Ni, and Zn using atomic absorption spectrophotometer (Analyst 400 Perkin Elmer model). Data obtained from laboratory exercise were analysed using various multivariate geostatistical techniques such as: Enrichment factor (EF), pollution index (Pi), pollution classification (PC), geoaccumulati-on index (Igeo) and potential ecological risk index (RI).  The EF shows that Pb and Cu are major pollutants having impacts on the study area, followed by Cd. The metals EF are significant (r > 1.5) in all the MVs except Obada. This suggests that Pb and Cu are probably from anthropogenic inputs. Ecological risk assessment results reveal that the environment is under varying degree of threats posed by the activities of the mechanic villages to the immediate environment. Therefore, the need for polices by relevant agencies including environmental education and training in respect of automobile wastes disposal practices that will ensure sustainable environment.

Keywords

Pollution Classification, Pollution Index, Mechanic Villages, Multivariate Geostatistics, Anthropogenic


Title

Environmental Friendly Building Materials: Unfired Clay Bricks

Abstract

The continuous search for affordable and environmental friendly housing, led to investigations into new building masonry materials. Clay is a natural resource of the planet and one of the most common and has been recently “rediscovered” as an ecologically sound and healthy building material. Due to problems with shrinkage and swelling of clays and changes in material properties, we tried to stabilize the mixtures realized with clay using cement, lime and sand as binder, and we also added sawdust in each batch made. The tests that we made were concerning: apparent density, bending tensile strength and compressive strength. By using clay and sawdust in this “rediscovered” building material, results a good impact on environment. The values obtained for compressive strength were within the acceptable standards for clay masonry units.

Keywords

Unfired Clay Bricks, Building Materials, Thermal Insulation, Environmental Friendly