Bangladesh J. Environ. Sci., Vol. 36, 6-10, 2019 @ BAED ISSN 1561-9206

ASSESSMENT OF TUBE WELL AND CANAL WATER QUALITIES AT BOGRA CITY AREA OF BANGLADESH

M. N. Morshed, M. N. Alam1, M. T. Rahman2, M. A. Alam3 and S. Mandal4

Bangladesh Sugarcrop Research Institute, Rahmatpur sub-station, Barishal

1Department of Management, Govt. Edward College, Pabna

2Bangladesh Jute Research Institute

3Bangladesh Sugarcrop Research Institute, Chunarughat sub-station, Hobiganj

4Farm Division, Bangladesh Sugarcrop Research Institute,Ishurdi, Pabna

ABSTRACT

A study was conducted at Bangladesh Sugarcrop Research Institute, Pabna to determine major ionic constituents including heavy metals in waters collected from fourteen different locations of Bogra city.

The concentration of heavy metals in water samples were determined by using an atomic absorption spectrophotometer (AAS). The electrical conductivity (EC) values of water samples varied from 326 to 1265 µS cm-1 while the pH range was 6.26 to 7.25. In respect of total dissolved solids (TDS), all samples were categorized as fresh water. Dissolved oxygen (DO) values of samples were within the range of 0.3 to 0.6 mg L-1, indicating severe stress for aquatic biota.

The mean concentrations of Ca2+, Mg3+, Na+, K+, BO33-, PO43- and SO42- in water samples were 51.67, 26.07, 32.77, 11.98, 0.25, 0.67 and 10.85 µg mL-1, respectively. Considering Cl-1 content, 50%  samples were found within the permissible limit of irrigation, but in respect of HCO31- content, all water samples were problematic for irrigation. According to drinking  quality guideline, all water samples of the study area were found unsuitable in respect of HCO31- and Cl- contents.

The mean concentrations of total Fe, Mn, Cr and Ni in water samples were 0.79. 0.25, 0.005 and 0.012 µg mL-1, respectively while the amount of Zn, Cu and Pb were below the detectable limit. The quality assessment showed relatively high values of Fe and Mn in most of the samples, which would make them unsafe for drinking and irrigation purpose, respectively.

Key words: Water quality, ions, heavy metal