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: 966

Table of Content: July 2013; 7(7)

July 2013

Heavy metal pollution in drinking water - a global risk for human health: A review

       Water resources in the world have been profoundly influenced over the last years by human activities, whereby the world is currently facing critical water supply and drinking water quality problems. In many parts of the world heavy metal (HM) concentrations in drinking water are higher than some international guideline values. Discussing about the HM pollution in drinking water, the...

Author(s): Fabián Fernández-Luqueño, Fernando López-Valdez, Prócoro Gamero-Melo, Silvia Luna-Suárez, Elsa Nadia Aguilera-González, Arturo I. Martínez, María del Socorro García-Guillermo, Gildardo Hernández-Martínez, Raúl Herrera-Mendoza, Manuel Antonio Álvarez-Garza and Ixchel Rubí Pérez-Velázquez

July 2013

A study of valuation clients perception on mortgage valuation reliability

The effect of overvaluation and undervaluation cannot be over emphasized in any economy. Valuation opinions are very crucial to the operations and business dealings of the clients that seek valuer’s advice in decision making. Wrong opinion of value has caused strain in many business dealings. This paper studies the perception of clients on reliability of mortgage valuation in Nigeria. A sample size of 50 lending...

Author(s): Adegoke O. J. Olaleye A. and Oloyede S. A.

July 2013

Community-environment relations and development of rural communities in Uyo, Nigeria

  Primary production activity and environmental resources hold the key to rural development. The range of activities in primary production forms the basis with which rural communities relate with the environment and carry out rural development activities. This study examined the interactions in man-environment system and how such interactions could affect development processes. A multistage sampling framework...

Author(s): Ikurekong, E. E. and Atser Jacob

July 2013

Ecosystem recovery analysis of mine tailings at Mhangura copper mine through normalised difference vegetation index

Remote sensing techniques are increasingly being employed in monitoring environmental change. Vegetation indices such as normalised difference vegetation index (NDVI), are useful in estimating primary production, an important component of ecosystem function. The success of rehabilitation on mine tailings may be indirectly assessed through NDVI changes. Mine tailings at Mhangura copper mine, Zimbabwe, have not been...

Author(s): Gregory M. Dowo and Shakkie Kativu

July 2013

Multi-temporal assessment of forest cover, stocking parameters and above-ground tree biomass dynamics in Miombo Woodlands of Tanzania

  Miombo woodlands form the widespread ecosystem in Tanzania. The ecosystem of these woodlands serves as a carbon sink and source containing majority of the above-ground terrestrial organic carbon. The study assessed forest cover, stocking parameters and above-ground tree biomass dynamics in the Miombo woodlands of Bereku and Duru Haitemba in Tanzania. The data were obtained from conventional forest inventory...

Author(s): Almas Kashindye, Elifuraha Mtalo, Mathew M. Mpanda, Evaristo Liwa and Richard Giliba

July 2013

Variations in the physico-chemical properties of Dal Lake, Srinagar, Kashmir

  Basic physical and chemical characteristics of the water in Dal lake Srinagar were determined. Surface water was sampled on monthly basis from June 2010 to April 2011. To determine the variations in physico-chemical parameters of Dal lake, a total of 21 physico-chemical parameters from six different site spread in four basins of lake was monitored. Our findings highlighted the deterioration of water quality...

Author(s): Basharat Mushatq, Rajni Raina, Tabasum Yaseen, Ashwani wanganeo  and A. R. Yousuf

July 2013

Effect of rainfall on cropping pattern in mid Himalayan region

  The analysis of effect of rainfall during the last 20 years is needed to evaluate cropping pattern in the rain-fed region. In this study, trends in annual, seasonal and monthly rainfall of district of Himachal Pradesh in India over the past 20 years were examined.  The annual rainfall varies from 863.3 to 1470.0 mm. During the summer season, the highest total rainfall was 1089.7 mm during 2000, whereas...

Author(s): R. K. Aggarwal

July 2013

Heavy metal characteristics of groundwater in Ibadan South Western, Nigeria

    Full Length Research Paper   Heavy metal characteristics of groundwater in Ibadan South Western, Nigeria   Laniyan, T. A.*, Bayewu, O. O. and Ariyo, S. O.   Department of Earth Sciences, Olabisi Onabanjo University, Ago-Iwoye, Nigeria.   *Corresponding...

Author(s): Laniyan, T. A., Bayewu, O. O. and Ariyo, S. O.

July 2013

Nitrate and ammonium levels of some water bodies and their interaction with some selected properties of soils in Douala metropolis, Cameroon

       The present study examined the nitrate (NO3-) and ammonium (NH4+) levels of Rivers Wouri and Dibamba and some streams that feed them. The interaction of NO3- and NH4+ with some soil properties was also investigated. It was necessitated by the usage of these rivers for livelihood, despite the deposition of discharges into these streams. Twenty eight (28) surface water and four soil...

Author(s): Aaron Suh Tening, George Bindeh Chuyong, Godswill Azinwie Asongwe, Beatrice Ambo Fonge, Lydia Likowo Lifongo and Beatrice Ketchemen Tandia

July 2013

Assessment of oil contamination in the bay of Porto Grande (Cape Verde) using the mullet Chelon bispinosus

  Polycyclic aromatic hydrocarbons (PAHs) are a group of persistent organic pollutants, some of which are mutagenic and carcinogenic so PAH concentrations in fish used for human consumption are crucial to assess impact to human health. Total PAH concentrations in muscle and liver of mullets Chelon bispinosus from the Bay of Porto Grande (Cape Verde) (four sites in the bay and a control) ranged from 112.7 to...

Author(s): N. Pinheiro, L. Barreira, B. Lopes and M. J. Bebianno

July 2013

Application of the biosurfactants produced by Bacillus spp. (SH 20 and SH 26) and Pseudomonas aeruginosa SH 29 isolated from the rhizosphere soil of an Egyptian salt marsh plant for the cleaning of oil - contaminataed vessels and enhancing the biodegradation of oily sludge

During the screening for biosurfactant-producing bacteria isolated from the rhizosphere soil of an Egyptian salt marsh plant, three bacterial strains (Bacillus spp. SH 20 and SH 26, and Pseudomonas aeruginosa SH 29) were most active strains. Biosurfactants produced by the three bacterial strains were stable at wide range of pH (1 to 14), wide range of temperature (0 to 121°C) and salinity (5 to 15% NaCl). The two...

Author(s): Ali Diab and Shereen Gamal El Din

July 2013

Positions of human dwellings affect few tropical diseases near Baghdad city, Iraq

  Some factors that possibly affect tropical disease distribution was investigated in about 500 randomize human dwellings. The studied factors include wild animals, domestic animals, wild plants, cultivated plants, nature of soil, nature of water, positions of human dwellings, nature of building material and position of animal shelters. The diseases that studied were malaria, Kala-azar (visceral leishmaniasis),...

Author(s): Shihab A. SALMAN, Mohammed J. AL-OBAIDI and Fadhaa O. SAMEER

July 2013

Evaluation of polybrominated diphenyl ethers in sediment of Lagos Lagoon, Nigeria

        Certain pollutants, particularly synthetic organic compounds have given rise to important environmental concerns. New organic pollutants especially polybrominated diphenyl ether (PBDEs) employed in electronic equipment and in some household items as flame retardants are now finding their way into the aquatic environment as components of waste discharge into the water body. These...

Author(s): Adewuyi, G. O. and Adeleye, A. O.

July 2013

Rate of absorption and interfacial area of chlorine into aqueous sodium hydroxide system

  Due to excellent mass transfer characteristics with energy efficiency jet ejectors can be used in place of conventional countercurrent systems, namely, packed bed contactors as well as venturi scrubbers, cyclones and airlift pumps. The removal of chlorine from certain gases by absorption in aqueous solutions of sodium hydroxide is industrially important in several chemical processes particularly in pollution...

Author(s): K. S. Agrawal

July 2013

Nitrate concentration in drinking water supplies in selected communities of Ibadan Southeast local government, Ibadan, Nigeria

Elevated levels of nitrate in drinking water have been associated with adverse health effects. Most susceptible to nitrate toxicity are infants under six months of age and pregnant women. This study assesses the nitrate concentration of 48 randomly selected wells in an urban-slum setting in Ibadan South East Local Government Area (IBSELGA), Nigeria. The coordinates of the wells were mapped with a hand-held Global...

Author(s): Elizabeth O. Oloruntoba, Mynepalli K. C. Sridhar, Ramon T. Alabi and Stephen  A. Adebowale

July 2013

Knowledge, attitudes and practices study of dengue viral infection and its association with environmental factors and health issues, Lahore Pakistan

        This study was designed to assess and compare the awareness, approach, and practices of dengue positive and dengue negative patients regarding dengue fever in a tertiary care hospital of Lahore district, Pakistan from April to May 2012. A total of 250 samples (125 dengue positive and 125 dengue negative) were collected and tested for Dengue IgM and IgG antibodies test by ELISA...

Author(s): Mariam Zameer, Maryum shuja, Arooj Ashraf, Nadia Mukhtar and Bilal Munir Ahmad

July 2013

The economic cost of air pollution in Mangaung metro municipality: A case study in South Africa

Economic and domestic activities have been causing a profound deterioration of air quality in developed and developing countries. The health problems arising from air pollution have become apparent which result in welfare losses in society such as increased workdays lost and high health cost. This study shows the mitigating cost and workdays lost as a result air pollution related illness and the factors influencing...

Author(s): Israel-Akinbo Sylvia Olawumi, Nicky Matthews, Henry Jordaan and Godfrey Kundhlande,

July 2013

The effect of pesticides on fish fauna of Bhopal lower lake (M. P.)

The analysis of effect of rainfall during the last 20 years is needed to evaluate cropping pattern in the rain-fed region. In this study, trends in annual, seasonal and monthly rainfall of district of Himachal Pradesh in India over the past 20 years were examined.  The annual rainfall varies from 863.3 to 1470.0 mm. During the summer season, the highest total rainfall was 1089.7 mm during 2000, whereas lowest...

Author(s): Mukesh Kumar Napit