Impact of Tannery Effluents on the Quality of Environmental Samples and Bioremediation Potentials of Microbial Isolates

Description

– Impact of Tannery Effluents on the Quality of Environmental Samples and Bioremediation Potentials of Microbial Isolates  –

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Abstract

Impact of tannery effluents in the environment and bioremediation potentials of microbial isolates were evaluated using different methods.

Physico–chemical properties of the effluent samples vary in each tannery with higher mean values in Tan A followed by Tan C and then Tan B, indicating higher pollution level in the order Tan A < Tan C < Tan B. Similarly, these properties in well water samples studied fluctuate.

Significant differences were observed in mean TDS, DO and BOD values. Seasonal variation in the mean physico-chemical properties of well water samples using students’ t-test showed significant differences, where higher TSS and BOD were recorded in the dry season while DO was considerably low in the dry season.

The mean Cr (4.85mg/L) concentration was significantly higher (P ≤ 0.05) in effluent sample compared to the well water samples. It was established that the level of chromium (Cr) were significantly higher (P ≤ 0.05) in effluent analyzed from Tan A (5.29mg/L) then Tan B (4.91mg/L) and the level was lower in Tan C (4.36mg/L).

Statistical analyses of heavy metal content in the tannery effluent from different sampling points revealed significant differences (P ≤ 0.05) among the tanneries where it shows decrease in all metal concentrations downstream.

Introduction

1.1 Background of the Study

The environment is under increasing pressure from the direct discharge of effluents from industries and municipal wastewaters into soils and water bodies. This has become a growing environmental problem.

This is because water is a very important element on the earth and plays a crucial role with direct impact on public health, environmental sustainability and life conservation. Water also known as blue gold, is one of the most priceless gifts of Nature.

It is also regarded as the life line on Earth, because evolution of life and development of human civilization could not have been possible without water (Sinha et al., 2004).

All great civilizations of the world evolved around the rivers. Rivers have been life line to the Earth and supposed to be yardstick to measure the society, since a dirty river means a dirty society.

Rapidly increasing population, indiscriminate urbanization and rapid industrialization along the rivers have put tremendous pressure on water resources and their quality (Sinha et al., 2004; Sinha et al., 2006).

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