African Journal of
Pure and Applied Chemistry

  • Abbreviation: Afr. J. Pure Appl. Chem.
  • Language: English
  • ISSN: 1996-0840
  • DOI: 10.5897/AJPAC
  • Start Year: 2007
  • Published Articles: 354

Full Length Research Paper

Study of the seasonal variations in Turag river water quality parameters

A. K. M. Lutfor Rahman1*, M. Islam1, M. Z. Hossain1 and M. A. Ahsan2
1Department of Chemistry, Jagannath University, Dhaka 1100, Bangladesh. 2Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh.
Email: [email protected]

  •  Accepted: 23 April 2012
  •  Published: 30 May 2012


The purpose of this study was to assess the degree of pollution of Turag river water by determining various physico-chemical parameters. Water samples were collected six times per year during wet and dry season at the following three locations: Tongi Railway Bridge, Bishwa Ijtema field and Ashulia. Most of the measured physicochemical parameters exceeded permissible limit of drinking water. The recorded pH ranged from 6.6 to 7.98 and Electrical Conductivity (EC) from 160 to 1107 µs/cm. The recorded dissolve oxygen (DO) varied from 0.11 to 6.8 mg/L and biological oxygen demand (BOD) ranged from 10 to 180 mg/L while chemical oxygen demand ranged from 21 to 220 mg/L and free COvalue from 5 to 22 mg/L. The concentration ranges of heavy metals and arsenic in ppb were as follows: Zinc (Zn) (0.04 to 0.4), cadmium (Cd) (0.043 to 2), arsenic (As) (1.15 to 4.8), (lead) Pb (2.29 to 18.62) and mercury (Hg) (0.12 to 1.45). Due to the increased values of the parameters pH, DO, BOD, COD and free COwater from these locations was not suitable for human consumption without appropriate treatment.


Key words: Tongi railway bridge, Ijtema field, Ashulia, industrial effluent, aquatic ecosystem.