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Investigation of Chemical Parameters and Major Anions of Two Selected Aquaculture Ponds at Santosh Region, Tangail, Bangladesh

F. Hossain
Department of Environmental Science and Resource Management,Mawlana Bhashani Science and Technology University, Santosh, Tangail, Bangladesh

R. Afrin
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Santosh, Tangail, Bangladesh

M. Y. Mia
Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Santosh, Tangail, Bangladesh

M. A. Akbor
Institute of National Analytical Research and Service (INARS), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh

M. A. Ahsan
Institute of National Analytical Research and Service (INARS), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh

Abstract/ Executive Summary:

The study was conducted to analyze the chemical parameters and major anionic contents of water from Taltola and Mullahbari Pond at Santosh, Tangail during the months from January to March 2014. Chemical parameters such as pH, EC, DO, TDS, BOD and Alkalinity of all water samples were ranged from 7.56 to 7.78, 239.7 to 342 μS/cm, 4.3 to 5.7 mg/L, 123.7 to 175 mg/L, 2.1 to 2.63 mg/L and 87 to 154 ppm, respectively. On the other hand, the anions such as F^-, Cl^-, NO₂^- , NO₃^-, SO₄^--were ranged from 0.221 to 3.8, 16 to 24, 2.5 to 3.8, 0.96 to 1.67 and 1.99 to 17.93 mg/L, respectively. In case of Br- the anionic value of water sample was not detectable.

Keywords: Anions, Ion chromatograph, Chemical parameters

Location: Aquaculture Ponds at Santosh Region, Tangail, Bangladesh

Start Date: 00-01-2014

End Date: 00-03-2014

Program Area: Animal Health and Management

Commodity: Water quality

Objectives:

1. To determine the status of chemical parameters and major anions in water of two selected ponds in this area to investigate the status of aquatic environment of the ponds, develop public awareness and help in formulating guidelines regarding this problem.

Methodology:

The study was conducted in two selected aquaculture ponds namely Taltola and Mullahbari Pond which are situated at Santosh region in Tangail district. The study was carried out from January to March 2014. The water samples were collected from three points of each of the two ponds. Plastic bottles were used for sample collection and before sample collection all the plastic bottles were properly cleaned by distilled water. Bottles were immersed below the water surface, filled brought out of the water and properly closed. Then they were labeled (date, time etc.) properly and preserved in a refrigerator. The pH, dissolved oxygen (DO), electrical conductivity (EC), total dissolved solids (TDS) values of water samples were measured by a Sension 156TM Multi-parameter. Biological Oxygen Demand (BOD) was measured by following 5 days incubation method. Distilled water was taken in volumetric flasks. Then aerated air was passed in the flask by an air compressor. The aerated water was transferred into volumetric flask and the beaker was filled with distilled water up to the mark. Then the dissolved oxygen (DO) content of collected water sample was measured by using DO meter. Then the bottle was kept in an incubator for 5 days. After incubation, the dissolved oxygen was measured again by using DO meter. The difference of two DO values was calculated for each sample and it was the BOD value. Alkalinity of the water samples were measured as CaCO3 and done by titration. Mixed indicator (Bromocressol green + Methyl orange) was used here. The color of the solution changes from green to orange at the end point. For measuring the anions (F^-, Cl^-, NO₂^-, Br^-, NO₃^-, SO₄^--), at first the samples were filtered with Qualitative filter paper (No. 1, Circles 90 mm Dia) and then kept in a 25 ml volumetric flask for each sample. Then the filtered samples were taken in vials by using syringe with micro-pipette filter. Every time the volumetric flasks, syringes and vials were washed with DI (De-ionized) water. Then the anions were determined using Ion-Chromatograph (Model: Shimadzu, CTO-20 AC SP.

Source of Information: J. Environ. Sci. & Natural Resources, 7(2): 89-92, 2014; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present study shows that all of the samples (water) were within permissible limit regarding chemical parameters and anions except NO₂^-. The values of NO₂^- were much higher than the permissible limit for fishing water and it should be minimized immediately. So, the NO₂^- values are not suitable for aquaculture.

Knowledge Management: Journal