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Comparative Study on Physico Chemical Parameters of Soil and Water Among Three Aquatic Successional Stages at Jahangirnagar University Campus

Sharmin Sultana
Jahangirnagar University, Savar.

M. E. Huda
Department of Environmental Sciences Jahangirnagar University, Savar.

Abstract/ Executive Summary:

This study was conducted on the physico stages (submerged floating, and emerged) of the wetlands of Jahangirnagar were selected along the study area and studied during January 2010 to October 2010. On an average, water PH, dissolved oxygen, acidity, alkalinity, total hardness, nitrate and free CO contained 6.2 ± 0.19; 6.85 ± 0.21mg/l; 36 and 1.6 ± 0.52 mg/l respectively & soil ± 0.18; 6.17 ± 0.89%, 0.27 ± 0.02mg/gm values of water PH, dissolved oxygen, acidity, alkalinity, total hardness, nitrate and free CO stage water were 6.86 ± 0.88; 6.82 ± 0.42 11.2 mg/l and 1.5 ± 0.52 mg/l respectively. And soil matter, were 6.38 ± 0.08; 6.13 ± 0.94%; For emerged stages water PH, dissolved oxygen, floating stage were 6.8 ± 0.26; 6.83 ± 0.37 8.69 mg/l; 1.7 ± 0.48 mg/l respectively. And were 6.43 ± 0.11; 6.11 ± 0.95%; 0.40 ± 0.02 mg/gm; 0.96 and negative correlations among these parameters were also studied. Strong positive correlations were found in between organic carbon-organic matter (r=0.99) in submerged stage, P 0.79), acidity-free CO2 (r=0.73), organic carbon stage, PH -dissolved oxygen (r=0.81), organic carbon correlation. Strong negative correlations were found in between alkalinity emerged stage. Organic carbon and organic matter showed significantly strong correlation (r=0.99) in all studied stages. From this study, it was found that, the water P stages than submerged stage. Dissolved oxygen was higher in submerged stages than floating and emerged stages. These may be because of submerged stage was early stage of decomposition process, variation of acidity, alkalinity and total hardness were found in three succession stages. High concentrations of water nitrate were obtained; this may due to the decomposition process on the lakes.

Keywords: Physicochemical parameters, Lake, Ecology

Location: Wetlands of Jahangirnagar University campus

Start Date: 00-01-2010

End Date: 00-10-2010

Program Area: Crop-Soil-Water Management

Non-commodity: Performance

Objectives:

Variations in physicochemical parameters of a water body could significantly influence the water treatment processes, portability of water supply as well as have long term effects on aquatic environment

Methodology:

Site selection is important in research work to relate the results with the spatial context in fulfillment of the aims and objectives of the research work. For convenient, three wetlands of Jahangirnagar University campus were selected those have fulfilled the aims and objectives of the research work. Locations and codes of samples are described in the following:Different samples identification: Sample ID-Lake-1; Lake-2 and Lake-3 & their succession stages were submerged, floating and emerged stages. Analysis of water samples: Water PH: The pH of water sample was determined by using a glass electrode pH meter (Griffin pH meter, model No.40). Dissolved Oxygen (DO): Dissolved oxygen content of sample water was determined by using DO meter (HANNA INSTRUMENTS: H19143). Total Hardness: A compleximetric titration using EDTA is a classical method for determining Ca and Mg simultaneously or individually (APHA-1998). Acidity of water: A compleximetric titration using EDTA is a classical method for determining acidity (APHA-1998). Alkalinity of Water: A compleximetric titration using EDTA is a classical method for determining acidity (APHA-1998). Free Carbon Dioxide: A compleximetric titration using EDTA is a classical method for determining acidity (APHA-1998). Water nitrate-nitrogen: Water nitrate-nitrogen was measured by Phenol disulphonic acid method as described by APHA-1998. Soil parameters: Soil pH: The pH of freshly collected moist soil was determined by using soil PH meter. Soil Moisture: Both soil PH and moisture content was measured by using soil PH meter. Soil Nitrate-nitrogen: Soil nitrate-nitrogen was measured by Phenol disulphonic acid method as described by APHA-1998. Soil Organic Carbon: Soil organic carbon content was estimated by titration method. Soil Organic Matter: The organic matter content of the soil was determined by multiplying the percentage of organic carbon with conventional van Bemmelen's factor of 1.724. Statistical analysis: Statistical analysis was followed by ‘An introduction to statistics and probability (Islam, 2001)’

Source of Information: Jahangirnagar University Environmental Bulletin, Vol.2, 26-34, 2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In the study area water PH value was higher in floating and emerged stages than submerged stage. Dissolve oxygen was higher in submerged stages than floating and emerged stages. Due to the decomposition process, variation of acidity, alkalinity and total hardness were found in three succession stages. Concentration of nitrate in studied lakes water was higher than the standard value. High concentrations of water nitrate were the result of decomposition process and also for contained huge amount of submerged vegetation. Organic carbon and organic matter showed strong correlation (r=0.99) in submerged, floating and emerged stage. From this study it can be said that nitrate level was high in the studied lakes and should be controlled by taking proper steps to prevent nitrate pollution.

Knowledge Management: Journal