Physicochemical parameters and heavy metal in surface water in Central Bangladesh

Abstract

Pollution of surface water and heavy metals is one of the growing concerns worldwide due to industrialization and unplanned urbanization. The surface water pollution level was studied by assessing the physicochemical properties and heavy metal concentration of collected samples in Gazipur district. Maximum average temperature(35.200C±2.63), EC(1423µs/cm), and TDS(746.5mg/l) were observed in Kaliakoir upazila. These parameters were found minimum in Kapasia upazila. DO was found above 5mg/l in Sreepur, Kapasia and Kaliganj. Cr and Ni were too low to detect by the instrument. The maximum average concentration of Pb(925.6917µg/l), Mn(477.8625µg/l), and Na(11230.17µg/l) was observed in Kaliakoir upazila. However, no Fe was observed in Kaliakoir upazila. The maximum Fe concentration was Sreepur upazila (3531.6µg/l) followed by Sadar (1496.517µg/l) upazila. Maximum average Cd concentration was observed in Kapasia (41.28µg/l) followed by Kaliakoir (30.8767µg/l), Sadar (29.4283µg/l) and Sreepur (28.8042µg/l). Cu concentration was found maximum in Kaliganj (14.205µg/l) followed by Sadar (6.29µg/l) and Kaliakoir (3.893µg/l). However, Cu concentration was found nil in Kapasia. The maximum average concentration of Ca(29197.25µg/l) and Mg(8142.833µg/l) was observed in Kaliganj and the minimum concentration was observed in Sreepur upazila. The order of concentration of heavy metals in the study area is Ca>Na>Mg>Fe>Pb>Mn>Cd>Cu>Ni>Cr. From the findings, the physicochemical parameters of the surface water sources were found higher than the standards in most of the samples.