Iranian Journal of Environmental Health Science & Engineering 01/2009;
Source: DOAJ

ABSTRACT Municipal solid waste management has emerged as one of the greatest challenges facing environmental protection agencies in developing countries. This study presents the current solid waste management practices and problems in Nigeria. Solid waste management is characterized by inefficient collection methods, insufficient coverage of the collection system and improper disposal. The waste density ranged from 280 to 370 kg/m3 and the waste generation rates ranged from 0.44 to 0.66 kg/capita/day. The common constraints faced environmental agencies include lack of institutional arrangement, insufficient financial resources, absence of bylaws and standards, inflexible work schedules, insufficient information on quantity and composition of waste, and inappropriate technology. The study suggested study of institutional, political, social, financial, economic and technical aspects of municipal solid waste management in order to achieve sustainable and effective solid waste management in Nigeria.

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    ABSTRACT: This study was conducted on vegetable gardens in and around Jos on the Jos Plateau, North central Nigeria; a city which has had strong European influence as a result of a long history of tin mining activity in the area. The study seeks to assess the degree of accumulation and/or contamination of the heavy metals in compost from municipal solid waste due for application as organic fertilizer in vegetable gardens as well as the potential human health risk associated with the consumption of vegetables grown with such organic fertilizer. Three waste dumpsites in Jos and gardens were selected where vegetables cultivation (cabbage, lettuce, spinach, turnip, carrot, radish, beet root, tomato and spring onions) are practiced. The representative samples of compost material, agricultural soil and vegetables were collected and analyzed for heavy metals such as: As, Cd, Co, Cr, Ni, Pb, Cu, Zn, Sb and Se. Geochemical results show that the concentrations of these elements in the compost are higher (in decreasing order of As>Cd>Zn>Pb>Cu>Cr) compared to that in the soils yet to be applied the organic fertilizer. The degree of contamination of the soils and the compost, the transfer factor (TF) from the agricultural soil to vegetables and its health risk index (HRI) were calculated. Results show that in general, the agricultural soils are severely contaminated by As, Cd, Zn and Pb (CF= 10-25). Other elements such as Cr, Cu and Ni have moderately contaminated the soil. All the vegetables seem to have been severely contaminated by Se and As (Se>As>Zn) and therefore are good accumulators of these toxic metals. The leafy and the root vegetables appear to be the major accumulator of Se and As respectively. The TF of As in all the different varieties of vegetables is >1, indicating that this element is readily absorbed by these plants. The HRI value for As, Pb and Zn is >1 for the all the vegetables and therefore is unsafe posing serious human health risks.
    American Journal of Environmental Protection. 01/2014; Vol. 3,(No. 6-2,):pp. 1-13..
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    Continental Journal of Environmental Sciences. 11/2013; 7(2):1-3.
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    ABSTRACT: Managing municipal solid wastes (MSW) is progressively becoming a major challenge in many cities of developing nations because of rapid urbanization and rise in population. This can be described by ineffective collection methods, inadequate coverage of the collection, processing system and inappropriate disposal. This paper presents the current state of solid waste management in a semi-urban city, its associated challenges and prospects that are within. A field work that involves the characterization and types of the waste generated, and frequency of collection was carried out within the study area. Four locations where the major waste bins are located within the city were considered. A representative sample of 280 kg was used for the waste characterization, and the results show that about 64% of the wastes are recyclable with lots of organic waste that can be used as compost. The only dump site in the city was visited in order to obtain useful information concerning the present state of solid waste management. The study revealed that there is presently no investment made to the existing development plan to introduce a modern waste management system. The study suggests new approach that could be used by institutions and government agencies for MSW management to realize a sustainable and efficient sanitation, and possible resources generation potentials that could be harnessed from the waste stream.
    Journal of South African Business Research. 10/2014; 2014(2014):1-13.


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