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Impact of Mining Activities on Geology of Barapukuria Open Coal Mine Area in Dinajpur, Bangladesh.

Dr. M. Zakir Hossain
Professor
Department of Agricultural Chemistry, BAU, Mymensingh-2202

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

M. M. Islam
Department of Agricultural Chemistry, BAU, Mymensingh-2202

Abstract/ Executive Summary:

The research work was conducted at the Department of Agriculture Chemistry, Bangladesh Agricultural University, Mymensingh. The research work was conducted at the Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh to investigate the status of heavy metal concentration as well as to assess their pollution level in water and soils of Barapukuria open coal mining area. A total of 50 water and 42 soil samples were collected from 4 sides of mining area and in each side up to 1 km distance was maintained. The collected water samples were analyzed for chemical parameters viz., pH EC, GTDS, DO, Ca, Mg, Na, K, Zn, Cu, Mn, Fe, B, CI, HCO3, PO4 and SO4. The pH of water samples fluctuated between 6.8 to 7.37. The electrical conductivity (EC) of water samples were within the range of 85 to 907 µS cm-1 indicating low to high salinity. The DO of all collected water samples were within the range of 1.5 to 1.8 mg L-1 with an average of 1.7 mg L-1 indicating that aquatic life is in under stress. The cation chemistry showed dominance for Ca, Na and Mg while the dominant anions were HCO3 and SO4. The most dominant metal in water was Mn and 94% water samples were exceeded the maximum acceptable level (0.20 mg L-1) indicating Mn toxicity in water of the study area. The average concentration of CU, Zn, Pb, Cd and Cr in the soil samples were 22.42, 44.36, 19.63, 0.18 and 55.09 µg g-1, respectively. Out of 42 sampling stations, 27, 34, 33, 32 and 12 locations had the values higher for Cu, Zn, Cd, Cr and Pb, respectively than that of the geochemical baseline value of the study area. The deposition of outlet fly ash may responsible to increase heavy metal concentrations in surface soils around the study area. The overall order of soil environment hazard by various metals in the study area was Zn > Cr > CU >Pb > Cd. The calculated PLI values ranged from 0.54-1.69 for soil samples and the study results revealed that the contamination factor for most of the sampling sites for all studied heavy metals except Pb were higher than 1.0, which indicates that Zn, Cu, Cd and Cr were the major pollutants in the soils of Barapukuria open coal mine area. Finally, the calculated Igeo values of some soils of Barapukuria open coal mine area revealed moderate pollution level by CU, Zn, Cd and Cr from anthropogenic sources.

Keywords: Coal Mine, Geology,

Location: Department of Agricultural Chemistry, BAU, Mymensingh

Start Date: 01-07-2010

End Date: 30-06-2012

Program Area:

Commodity:

Objectives:

1) To get preliminary information about the impact of mining activities on the geology of Barapukuria open coal mine area, Dinajpur, Bangladesh. 2) To determine the metal concentration in soil, water and plants on the study area. 3) To study on mineralogy of the target area. 4) To assess the metalic pollution level and their mobility pattern in the area. 5) To make some recommendations on the basis of the research, so that further contamination can be minimized.

Methodology:

a) Preliminary information about the impact of mining activities will be collected by visiting the study area along with a questionnaire. b) Soil, water and plant samples will be collected from different selected sites and will be processed for subsequent chemical analysis following standard methods. c) The concentration of different metals (Cd, Cu, Pb, Zn, Cr, As, Ni etc.) with their speciation in soils, water and plants will be determined by Atomic Absorption Spectrophotometer (AAS) on the basis of standard analytical techniques described by Sparks et al. (1996). d) The mineralogical constituents present in the sample will be determined by the X-ray Diffraction (XRD) analysis at SRDI, Dhaka. e) Assessment of metalic pollution will be done on the basis of different standard indexes available on literature. f) Depending on the study results, some recommendations will be made for the appropriate authority of Bangladesh, which will help to take necessary initiatives to minimize the contamination level as well as it will open new dimensions in conserving soil health and environment as a whole.

Source of Information: Bangladesh Agricultural University Research Progress, Volume-22, 2011. Proceedings of the workshop of BAU Research Progress, 02-03 April 2012.

Article Link (Online Journal):

Funding Source:

1.	Budget: 2200000

Total Budget (Tk.) : 2200000

Achievement/Findings:

The metal concentration in soil, water and plants on the study areas, the geology of Barapukuria open coal mine area and the basis of the research areas contamination can be minimized , Dinajpur, Bangladesh..

Knowledge Management: Report/Proceedings