Identification of Nondegradable Toxic Chemicals from Industrial Effluents of Narayonganj and Surroundings Areas, Bangladesh, Responsible For Environmental Pollution

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Author(s) Meherun Nessa Begum | Md. Reazul Islam | Most. Ferdowsi Begum
Pages 518-523
Volume 4
Issue 11
Date November, 2015
Keywords Textile Effluent, Toxic, Pollution, ETP

Waste water disposal scenario in Bangladesh becomes a serious threat to the natural environment. Nonscientific and unplanned waste water disposal into open areas, canals, river, and ponds caused remarkable environmental pollution. Narayonganj is a hub of textile industries in Bangladesh and located near the capital city Dhaka. Bangladesh is one of the world largest garment production country. The effluent generated from the textile industries is a complex mixture of inorganic and organic chemicals which are not biodegradable. For present study eighteen wastewater samples were collected from different industries and seventeen sediment samples collected from adjacent areas of the wastewater stream. The sediment samples were collected by auguring at depth of 5-10 meter near the drain or cannel. Physical properties such as PH, Conductivity, Total Dissolved Solid (TDS) and temperature were measured by field kits in the field. The concentrations of Cu, Zn, Cd, Ni, Pb, Co, Mg & Al were determined in the Analytical Chemistry laboratory of Geological Survey of Bangladesh. Highest value of TDS, PH and temperature of the effluent was found 1560 ppm, 10.4 and 350C respectively. Conductivity of the samples ranged between 3350- 584 µs. Maximum value of BOD was found 66.8mg/l and minimum value of DO was 0mg/l. Highest chloride& fluoride concentration of effluent water was measured around 1523 mg/l and 25 mg/l respectively. Among all the industrial sector textile waste water is the most polluting agent of that area which ultimately harms the ecosystem and damage aquatic life. A primary individual effluent treatment should be placed before the outlet point of each industry. Finally a central ETP (Effluent Treatment Plant) can be established for treatment of the waste water.

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