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Research Detail

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H.M. Zakir
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh- 2202, Bangladesh

Kohinoor Begum
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh- 2202, Bangladesh

K.M. Mohiuddin
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh- 2202, Bangladesh

M.Y. Arafat
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh- 2202, Bangladesh

A study was conducted at the Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202 to determine major ionic constituents including heavy metals in waters collected from fourteen different locations of Bogra city, and accordingly to assess their quality. 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 water samples were categorized as fresh water. Dissolved oxygen (DO) values of samples in the study area were within the range of 0.3 to 0.6 mg L-1, indicating severe stress for aquatic biota. The mean concentrations of Ca2+, Mg2+, 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- content, 50% water samples were found within the permissible limit of irrigation, but in respect of HCO3- content, all water samples were problematic for irrigation. According to drinking water quality guideline, all water samples of the study area were found unsuitable in respect of HCO3- 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 water samples, which would make them unsafe for drinking and irrigation purpose, respectively.

  Water quality, Heavy metal, Bogra, Bangladesh
  Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh
  00-10-2011
  00-11-2011
  Crop-Soil-Water Management
  Water quality

1. To determine the concentration of major ionic constituents including heavy metals in waters collected from different areas of Bogra city, Bangladesh with a view to assess the level of contamination by using worldwide standards.

Bogra district has an area of 2919.9 sq. km. with annual average temperature maximum 34.6°C and minimum 11.9°C, and annual rainfall 1610 mm. Bogra is one among the newly industrial based areas of Bangladesh, which is highly susceptible to environmental pollution due to over population, rapid industrialization and urbanization in last 10 years. There are several types of industrial units including aluminium and ceramic factories, pharmaceutical and cosmetics industries, diesel plants, packaging industries, brick fields, garments and many others. Fourteen water samples were collected from some selected areas of Bogra city, Bangladesh following a standard procedure. Sampling was done during the month of October and November, 2010. About 500 mL water sample was collected from each location in plastic bottle and filtered through Whatman No.1 filter paper to remove unwanted solid and suspended materials. Then 3-4 drops of nitric acid were added to the samples to avoid any microbial growth. The pH, EC, TDS and DO values of water samples were measured by pH meter (Model-WTW pH 522), EC meter (Model-D.6072 Dreieich, West Germany), TDS meter (Model-HACH sensIONTM + EC5, USA) and DO meter (Model-OXi 3150i, Germany), respectively. Carbonate, bicarbonate and chloride concentrations in water samples were determined by titrimetric method.

  J. Agrofor. Environ. 5 (2): 21-26, 2011; ISSN 1995-6983
  
Funding Source:
  

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 water samples were categorized as fresh water. Dissolved oxygen (DO) values of samples in the study area were within the range of 0.3 to 0.6 mg L-1, indicating severe stress for aquatic biota. The mean concentrations of Ca2+, Mg2+, 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- content, 50% water samples were found within the permissible limit of irrigation, but in respect of HCO3- content, all water samples were problematic for irrigation. According to drinking water quality guideline, all water samples of the study area were found unsuitable in respect of HCO3- 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 water samples, which would make them unsafe for drinking and irrigation purpose, respectively.

  Journal
  


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