Ecotoxicological Techniques and Assessment of Environmental Samples



In this chapter the primary aspect was to dissect and determine the toxic nature of effluent and environmental samples (river sediments and water). This also involved sample manipulation coupled to a biosensor toxicity assay for the purpose of identifying possible remediation strategies for future environmental conservancy. Traditionally, the tanning industry has been associated with odours and water pollution from partially or untreated discharges. Sparging was used to identify toxicity associated with volatile organic compounds. This type of ­toxicity testing technique was found to be ideal for samples collected from tannery ­effluent treatment pits or pans and anaerobic lagoons. For example the toxicity of ­contaminants removed by treatment with activated charcoal, was identified for all the sampling points (tannery effluent treatment pits, anaerobic lagoons and riverine sampling points) except for the points upstream. A similar result was observed when filtration, as a technique, was used to identify toxicity associated with suspended solids. The approach used highlighted the complex nature of the toxic ­pollutants in the tannery effluent. Moreover the results strongly indicated the polluting sources and also the possible remediation strategies for effluents at various stages of the tanning industry.


Chemical Oxygen Demand Biological Oxygen Demand Ecological Risk Assessment Anaerobic Lagoon Double Deionise Water 
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© Springer New York 2010

Authors and Affiliations

  1. 1.Leather Development CouncilNairobiKenya

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