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A Case Study On Predicting The Environmental Impacts Of Untreated Tannery Effluent Generated From A New Industrial Site In Bangladesh

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Direct discharge of untreated tannery waste in the environment causes severe pollution and grave public health concerns. In this paper, the extents of pollution around a newly built industrial area, which is associated with untreated tannery effluent discharge, have been investigated. Temporal and spatial distribution of four heavy metals: chromium (Cr), lead (Pb), cadmium (Cd) and arsenic (As) have been modelled using a numerical model namely COMPASS, which studies coupled fluid flows, reaction and deformation processes in subsurface porous media. Two sets of contaminant discharge rates have been considered to predict the metal contaminations over a certain period. The results of the study suggest that a discharge of 0.026 m3 of wastewater per day can lead to high levels of Cr and Pb accumulation in the study area by exceeding the regulatory standards advised by many countries (Australia, China, UK and USA) and environment agencies. At this rate, concentration of As and Cd remain below the regulatory level in most cases. But an order of magnitude reduction in discharge rate, i.e., 0.0026 m3 per day results into safe concentration levels of all the metals considered in this study. The relative dominance of heavy metal contamination has been studied in the following sequence: Pb>Cr>As>Cd for sorbed concentration in soil aggregates and Cr>Pb>As>Cd for aqueous concentration in soil porewater. Further studies and information which are essential for a comprehensive environmental impact assessment have been highlighted.

About the Authors

Shakil A. Masum
School of Engineering, Cardiff University
United Kingdom
Cardiff, CF24 3AA

Md. Sultanul Islam
Daffodil International University

Faculty of Engineering



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Masum S.A., Islam M.S. A Case Study On Predicting The Environmental Impacts Of Untreated Tannery Effluent Generated From A New Industrial Site In Bangladesh. GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY. 0;.

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ISSN 2071-9388 (Print)
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