Trace metal analysis in soil samples of Hazaribagh tannery area by PIXE

Author
Dr. Engr. A. K. M. Fazlul Hoque
Professor
Natural Sciences
Daffodil Internation University

Introduction

The unplanned urbanization and industrialization of Dhaka, the capital city of Bangladesh has severely affected the environmental components, such as air, soil and water of the city and its adjacent areas. A large number of industries were set up in and around the Dhaka city. Hazaribagh is one of the densely populated residential areas where a large number of industries, especially tanneries were established. Around 185 tanneries have been operating their activities on 25 hector areas, processing 220 metric tons of hide a day and some 40 to 50 liters of liquid for each kilogram of hide which is poured down in natural canal or into the ground directly. 50 years old tannery complex are discharging their solid wastes and effluent containing putrid flesh, fat, blood and skin, toxic chemicals, salt, dissolved lime, chromium sulfate, alkali, hydrogen sulfide, sulfuric acid, dyes, oil, formic acid, various heavy metals, specially chromium, suspended solids, organic matters directly to the natural canals, in low lying areas, along road sides and water bodies between the dike and residential area without proper treatment [1] (A. Zahid and et. al, 2003). A significant portion of the tanning process requires huge amount of chromium where remarkable quantity of this chromium is discharged along with the effluent. The objective of the present work is to investigate the leaching of heavy metal pollutant such as Chromium (Cr), Copper (Cu), Nickel (Ni), Lead (Pb), Zink (Zn), Manganese (Mn), Iron (Fe), Aluminum (Al) and Arsenic (As), etc. in the surrounding soil from these tanneries industries.

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