ASSESSMENT OF HEAVY METAL STATUS IN SOIL OF DIFFERENT INDUSTRIAL AREAS IN NARAYANGANJ DISTRICT

Abstract

On the era of industrialization, land especially to nearside of Dhaka are occupying by different types of industries. As expected, industries are polluting the surrounding environment with their discharge. The study was carried out from July to December 2019 to investigate of heavy metal contamination in industrial waste at Narayanganj in Bangladesh. During the study soil samples were collected from different target location (Dying, Textiles, cement and steel industry as contaminate area and a nonindustrial

area as check sample) of Bandar, Madanganj, Nabiganj, Shiddhirganj and Meghnaghat of Narayanganj district. Later, different parameter like soil texture, pH, organic matter, Pb, Cd, Cr and Ni were analyzed from the collected sample. All the sites soil was loamy type, pH was almost neutral, and low organic matter was observed. The mean value of Pb, Cd, Cr and Ni in the soil sample of target area in Bandar was 26.8, 0.6, 27.0 and 21.7 mgkg -1 respectively. In Madanganj it was 23.5, 0.7, 30.2, and 16.0 mgkg -1 respectively. In Nabiganj it was 24.4, 0.80, 31.1 and 16.7 mgkg -1 respectively. In Shiddhirganj it was 34.0, 0.8, 36.7 and 23.9 mgkg

respectively. In Meghnaghat it was 29.2, 0.8, 27.7 and 17.7 mgkg respectively. Though heavy metal content of none of the industrial site exceeds the maximum permissible limits, all the samples from industrial sites contained higher heavy metal than the sample collected from non-industrial sites. Industrial waste must not be discharged to any of the open field, river, canal or any other water bodies before recycling. Therefore, industrial waste is a great concern to ecosystem and environment. It destroys the ecosystem function, environment balance and being health hazards. Further study should be carried out to carry out multiple variables related to waste and metal discharge to investigate the crisis so that clear and deeper information of impact may found.