Heavy metal fractionation in roof run off in Ile-Ife, Nigeria
Journal Title: International Journal of Environmental Science and Technology - Year 2006, Vol 3, Issue 3
Abstract
Runoff was collected from three different roofing materials that are commonly used for roofing in Ile-Ife, Nigeria, between the months of June to August, 2004. The samples were collected in four geographical locations in the town. The run offs were analysed for pH, Temp, TDS, CI- , S042-, PO43-, N032-, EC and some heavy metals both as regards total, dissolved and particulate fractions. Analysis of the heavy metals was done using flame Atomic Absorption Spectrophotometer. The quantity of these parameters varies with the different roofing materials. In terms of dissolved metals, Fe is the most predominant metal with mean values 0.59 ± 0.29, 0.82 ± 0.14, and 1.04 ± 0.27 mg/L for asbestos, ceramic tiles and metal sheets respectively. The tendency of the roofing materials to release dissolved metals is arranged as follows: Zn, Cr and Fe (metal sheet > Ceramic > asbestos); Cd and Pb (asbestos > ceramic > metal sheet). In terms of particulate metals, the concentration of Cd and Pb are higher in the asbestos than other roofing stuffs. The sequence of their predominance in asbestos is as follows: Pb (0.830.55 mg/L) > Cd (0.29 0.07 mg/L). In all the roofs, both particulate and dissolved metals except Zn exceeded WHO permissible limits for drinking water. The high levels of the metals obtained in this study may likely result in consumer complaints since some of the metals are not only carcinogenic but are also liable of impacting bad taste in water.
Authors and Affiliations
J. G. Ayenimo, A. S. Adekunle, W. O. Makinde, G. O. Ogunlusi
Keywords
Related Articles
- EP ID EP102114
- DOI -
- Views 117
- Downloads 0
Modeling of packed absorption tower for volatile organic compounds emission control
Development of chemical industry and high vapor pressure of volatile organic compounds (VOCs) have been caused that these materials recently be considered as a source of air pollution. These are different methods for sep...
Biological Indicators of Air Quality in Brisbane, Australia
During very considerable progress in industry and industrial centres development in late 20th and early 21st century, air pollution has become one of the most significant problems of mega cities. Thus, air pollution surv...
Application of chlorine dioxide for secondary effluent polishing
There are still many difficulties for developing the projects of using treated effluents. In this study, the efficiency of chlorine deoxide in the process of preparing the effluent of Sahebgharanieh Plant of Tehran for r...
Removal of hydrogen sulfide by zinc oxide nanoparticles in drilling fluid
Hydrogen sulfide is a very dangerous, toxic and corrosive gas. It can diffuse into drilling fluid from formations during drilling of gas and oil wells. Hydrogen sulfide should be removed from this fluid to reduce the env...
Influence of operating conditions on the removal of Cu, Zn, Cd and Pb ions from wastewater by adsorption
Nile Rose Plant was used to study adsorption of several cations (Cu2+, Zn2+, Cd2+ and Pb2+) from wastewater within various experimental conditions. The dried leaves of Nile Rose Plant were used at different adsorbent/met...