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Risk Factor Assessment of Coal Mine Drainage Water on Surrounding Agricultural Soil: A Case Study at Barapukuria in Bangladesh

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Journal of Geoscience and Environment Protection 2016年第2期4卷 7-17页

作者： Sharmin Sultana Pradip Kumar Biswas Aminur Rahman Shanjida Sultana mohammad nazim zaman Institute of Mining Mineralogy and Metallurgy Bangladesh Council of Scientific and Industrial Research Khonjonpur Joypurhat Bangladesh

This study is performed to know the contamination level of heavy metals on the surrounding agricultural soils at the site of Barapukuria Coal Mine Company Limited (BCMCL). Total concentrations of eight heavy metals (Cu, As, Cd, Zn, Pb, Cr, Ni and Mn) were measured in that soil. To calculate the contamination level, the enrichment factor (EF), geoaccumulation index (Igeo) and Hakanson potential ecological risk index were done. Igeo values indicated that the study areas at all stations were suffering from moderate contamination with As. The results of enrichment factor revealed that soils in all stations were in extremely high enrichment condition by As metal. Under Hakanson potential ecological risk index, the contamination coefficient () and potential ecological risk index () were calculated. The degree of contamination at BCMCL area reflects moderate contamination. By considering the ecological risk index of a particular heavy metal, the order is as follows: Cd > As > Cu > Pb > Ni > Cr > Zn and Cd has the highest risk index and poses the greatest damage to the BCMCL area’s soil. EF, Igeo values and potential ecological risk index indicate that there is considerable As and Cd pollution, mainly caused by coal mine drainage water.

关键词： Barapukuria Coal Mine Heavy Metal Contamination Coefficient Enrichment Factor Geoaccumulation Index Potential Ecological Risk Index

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Mineralogical and Physical Characterization of Clay of Sitakunda Anticline: Used for Ceramic Industries

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Journal of Minerals and Materials Characterization and Engineering 2018年第3期6卷 333-344页

作者： Mst. Shanjida Sultana mohammad nazim zaman Md. Aminur Rahman Pradip Kumar Biswas Pranab Kumar Nandy Institute of Mining Mineralogy and Metallurgy Bangladesh Council of Scientific and Industrial Research (BCSIR) Khonjonpur Joypurhat Bangladesh

This study focuses on mineralogical and chemical characterization of clay of Sitakunda anticline, Bangladesh and potential suitability of this shale as raw materials in ceramic industries. The shale which is clay in texture is composed of chlorite and kaolinite with common illite, smectite, quartz, mica and feldspar. There are two types of samples in color, grey and red. Chemical compositions of clay samples are analyzed by XRF and mineralogical composition of sample analyzed by XRD. Clay samples contain significant amount SiO2, Al2O3 and Fe2O3 with other minor compounds. The plasticity index (12.08 and 16.37) indicates medium ranges of the plasticity of clay. To determine the suitability of ceramic materials, samples were made in a rectangular shape for firing 850°C to 1100°C temperature. The samples were tested for different physical properties such as compressive strength, linear shrinkage, water absorption, porosity and bulk density. Low linear firing shrinkage (0.7% to 2.69%) and water absorption (1.5% to 11%) of the developed ceramic bodies were observed. Scanning Electron Microscope photographs confirm the vitrification of the ceramic bodies. The chemical, physical and ceramic properties of these clays indicate their suitability as raw materials for the production of a wide range of ceramic materials.

关键词： Clay Water Absorption Linear Shrinkage Ceramic

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Isolation and Characterization of Beneficial Microorganisms in Organic, Semi-Organic and Conventional Fertilizer Treated Agricultural Field Soil and Comparison of Bacterial Richness

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Journal of Agricultural Chemistry and Environment 2020年第4期9卷 223-239页

作者： Md. Mahfujur Rahman Laisa Ahmed Lisa Sunzid Ahmed Md. nazim Uddin Tuhina Hasan Sharmin zaman Department of Microbiology Jagannath University Dhaka Bangladesh Department of Biochemistry and Molecular Biology Jagannath University Dhaka Bangladesh Centre for Advanced Research in Sciences (CARS) University of Dhaka Dhaka Bangladesh Horticulture Research Center Bangladesh Agriculture Research Institute (BARI) Gazipur Bangladesh

The effect of different farming systems on microbial communities in agricultural environment was investigated in the present study. Depending on the present farming trend, the microbial distribution in agricultural soils treated with organic, semi-organic and conventional fertilizers was analyzed. A total of 20 soil samples were collected from different types of agricultural fields of Bangladesh Agricultural Research Institute (BARI, Gazipur). Microorganisms playing beneficial roles in soil such as nitrogen fixation (e.g. Rhizobium sp., Azotobacter sp.), phosphate solubilization (e.g. Bacillus sp., Pseudomonas sp., Phosphobacteria) and auxin production (e.g. Pseudomonas sp., Serratia sp. and Bacillus sp.) were evaluated from each of the samples. The results revealed that agricultural fields treated with chemical fertilizers showed lower microbial count than that of organic fertilizer treated agricultural fields’ soil samples. In addition, organic fertilizers amended field soils have higher phytohormone (Auxin) activities, phosphate solubilization bacteria and other bacterial richness compared to chemical fertilizer applied field soil.

关键词： Chemical Fertilizer Organic Fertilizers Bacterial Richness and Bacterial Diversity

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