African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1126

Table of Content: August 2012; 6(8)

August 2012

Anaerobic composting of pyrethrum waste with and without effective microorganisms

This study investigated the use of effective microorganisms (EM) for enhancement of biogas production through composting of solid pyrethrum remains after extraction of pyrethrins (marc). The laboratory scale experiment involved composting of the waste as substrate mixed with EM at different ratios consisting of a control, substrate with EM at of 1:250, 1:500, and 1:1000 v/v. Results show highest production of biogas at...

Author(s): W. Mwegoha

August 2012

Effects of rainwater harvesting and afforestation on soil properties and growth of Emblica officinalis while restoring degraded hills in western India

Effect of rainwater harvesting (RWH) structures like Contour trench (CT), gradonie (GD), box trench (BT), V-ditch (VD) and afforestation with Emblica officinalis Gaertn (planted in August, 2005) were studied in <10%, 10-20% and >20% slopes with a view to improve soil status, plant growth, sequester carbon and rehabilitate hills for local benefits. Soil pH and EC decreased and percent soil, SOC, NO3-N and...

Author(s): G. Singh, A. U. Khan, Ashok Kumar, N. Bala and U. K. Tomar

August 2012

A study of chemical speciation of metals in aquatic bottom sediment of Aiba reservoir, Iwo, Nigeria

  The species and total mean metal concentrations of some potentially environmental toxic metals (manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), and lead (Pb)) in the sediments of Aiba reservoir were examined. The total mean value were in the order of Fe > Mn > Zn > Cu > Pb. The metal concentrations (mean ± standard deviation (SD) in µg/g dry weight) were Mn, 28 ± 0.88; Fe,...

Author(s): Godwin Oladele Olutona, Olapeju Gifty Aribisala and Emmanuel Adewuni Akintunde

August 2012

Assessment of toxic heavy metal loading in topsoil samples within the vicinity of a limestone quarry in South Western Nigeria

  Loading of Pb, Cd, Cr, Cu, Co, Mn, Ni, Zn, and Fe in topsoil samples (TS) collected from the vicinity of limestone quarry in South Western Nigeria was investigated. Thirty TS weresampled within ½ km radius from exploration area and 5 background samples from undeveloped area 10 km away from the study area. Limestone rock  samples (RK) were...

Author(s): Effiong U. Etim and Gilbert U. Adie