Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Hydro-environmental Pollution of Turag River in Bangladesh

J. B. Islam
Institute of National Analytical Research and Service, Bangladesh Council of Scientific and Industrial Research, Dhaka-1205, Bangladesh

S. Akter
Institute of National Analytical Research and Service, Bangladesh Council of Scientific and Industrial Research, Dhaka-1205, Bangladesh

A. C. Bhowmick
Department of Chemistry, Mawlana Bhashani Science and Technology University, Tangail-1902, Bangladesh

M. N. Uddin
Pulp and Paper Research Division, BCSIR Laboratories, Dhaka, Dhaka-1205, Bangladesh

M. Sarkar*
Pulp and Paper Research Division, BCSIR Laboratories, Dhaka, Dhaka-1205, Bangladesh

Abstract/ Executive Summary:

The pollution due to minerals and anions in surface water and their settlement tendency on sediment of the Turag river has been studied. Higher concentration of potassium and phosphate ion in surface water and similar deposition on sediment has been recorded. The observed average concentration of Na, K, Cl-, PO43- in surface water and in surface sediment was 22.10, 13.20, 108.50, 17.80 mg/L and 1359.07, 2526.10, 37.50, 31.76 mg/kg, respectively. This high concentration of minerals and anions in surface water and sediments indicates that hidro-environment of the Turag river is badly affected.The minerals and ions are strongly correlated (r = 0.99) which implies that they come from similar sources and forcefully added to the river in a regular basis. Principal component analysis reveals that only one principal component is covering more than 99 % of cumulative variance. There are very few variations of parameters in the principal component to indicate that all parameters exert similar effect on hydro-environment and are contributing to deteriorate the ecological balance.These are supported by dendrogram analysis.

Keywords: Minerals; Anions; Pollution; Principal component analysis; Cluster analysis

Location: Turag river

Start Date:

End Date:

Program Area: Risk Management in Agriculture

Non-commodity: Pollution

Objectives:

We aim at monitoring the mineral and ionic pollution in surface water and sediment to assess the hydrochemistry, ecosystem for understanding hydrological balance of Turag river. Finally, we analyzed the data for correlation, principal component analysis and cluster analysis for better understanding the inter connectivity of the minerals and ions.

Methodology:

Study Area The Turag river is one of the major rivers of Bangladesh which is the upper tributary of the Buriganga river and originated from the Bangshi river in Kaliakair Upozila. Truag river is a commercially important and navigable river all year round. According to literature, the Turag is facing huge pollution problem from industrial and household sources. Therefore, we select this river as our study area in industrial vicinity. Samples were collected from the three preselected untreated industrial effluent discharged arena of the Turag river during Dry (February) and Wet (June) season in 2015. The sampling stations were Dhaka dyeing (SS-1), Hossain dyeing (SS-2) and Zaber & Zubair Fabrics (SS-3). Sample collection and preparation Surface water samples were collected from 60 cm deep from the surface and sediment samples were collected from the undisturbed top 5 cm layer.The collected samples were transferred carefully to the laboratory as soon as possible. Water samples were preserved in refrigerator for preventing microbial decomposition of different materials present in the samples. Before analysis samples were taken to the normal temperature. Sediment samples were sun dried first and then dried in oven at 50 ^oC. After drying, sediment samples were ground in a motor and sieved for homogeneity. Finally, 1.0 g of each sample was digested using 10.0 mL of concentrated HNO₃ and aliquot portion of water on a hot plate till to dryness. After that 5.0 mL of concentrated HClO₄ was added and then digestion was continued. The obtained solution was diluted to 100 mL with double distilled water. Experimental Samples were analyzed according to the standard procedure (APHA, 1915). The samples were digested before analysis. An aliquot of 100 mL of each sample was taken into a 250 mL of pyrex beaker. To acidify the sample, 1 M concentrated HCl (9 mL) as well as 1 M concentrated nitric acid (3 mL) was added in the beaker. The solution was carefully heated on a sand bath near to dryness into the fume hood. After cooling to the room temperature, deionized water was added to the sample up to the mark of a 100 mL flask. The solution was filtered and the filtrate was collected in a screw cap plastic tube. Digested samples were used for every analysis. The Atomic Absorption Spectrometer (AAS) was calibrated for all the metals by running different concentration of standard solutions. Sodium and potassium were measured by Flame Photometer (PFP7, JENWAY), while calcium and magnesium were analyzed by AAS (AA240FS, VARIAN). A N2O-air-acetelene flame was used for calcium analysis and air-acetelene flame was used for magnesium analysis. The anions, F-, Cl-, Br-, NO_2-, NO_3- and SO42- ware evaluated by Ion Chromatograph (LC-10AD, Shimadzu, Japan) and PO42- was measured spectrophotometrically by a UV Spectrophotometer (UV-1650 PC, Shimadzu). Data Analysis The obtained data were correlated statistically. Principal Component Analysis (PCA) and Cluster Analysis (CA) have also been done. Hierarchical Cluster Analysis has been used here to see the coexistence of minerals and anions in the surface water and sediments in the river and the output is expressed through Dendrogram. All analyses were performed by Statistical Package for Social Sciences software (SPSS 16).

Source of Information: Bangladesh J. Sci. Ind. Res. 53(3), 161-168, 2018

Article Link (Online Journal): DOI: http://dx.doi.org/10.3329/bjsir.v53i3.38261

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The concentration of minerals and ions is unexpectedly high in the surface water and surface sediment in the Turag. Concentration of K is relatively higher in sediment than in surface water as compared to other minerals which means that K is more likely to settle down. The sources of minerals and ions are similar and they exert similar level of effects on ecosystem which is predicted by the correlation, PCA and CA data. The ecosystem of Turag river is disturbed by the pollutants like color, minerals and anions generated from industries, household, municipal, land runoff and anthropogenic source. Therefore, the aquatic environment, hydrochemistry and biogeology are ruined day by day. A policy should be immediately taken by the respective authority to prevent the unethical discharge of effluent for protecting the hydro-environment of Turag river.

Knowledge Management: Journal