Browsing by Author "Aarif Jamal"

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Coal characterization and occurrence of rare earth elements in coal and coal-ash of Sohagpur Coalfield, Madhya Pradesh, India
(Routledge, 2021) Prashant Modi; Aarif Jamal; Nikhilesh Singh
Coal is a valuable source for power energy as well as for metal contents within it. Coal and its by-product are considered a promising resource for the critical elements and rare earth elements (REEs). The study of REEs in coal is in its infancy. This paper focuses on REEs’ occurrence, qualitative, and quantitative in coal and its by-products (shale coal, shale coal ash, and coal ash) of Sohagpur Coalfield, Madhya Pradesh, India. The collected coal samples were analyzed by scanning electron microscope with energy-dispersive X-ray analysis, inductively coupled plasma mass spectrometry, bomb calorimeter, thermogravimetric analysis, and ultimate analysis. The REEs’ concentration of Sohagpur Coalfield was also compared with the Chinese coal, US coal, and world coal average. The average content of critical REEs for Y is 51.49 ppm, for Nd is 79.34 ppm, for Eu is 2.67 ppm, for Tb is 1.71 ppm, and for Dy is 9.76 ppm in samples. The highest average values of REEs reported for Ce are 58.15 ppm in coal and 187 ppm in coal ash by-products. Coal by-products of the collected samples are a good resource for REEs than the Chinese coal, US coal, and world coal averages. © 2021 Taylor & Francis Group, LLC.
Delineation of groundwater potential zones in Singrauli coalfield using remote sensing, GIS and multi-influencing factor (MIF) techniques, India
(Springer Science and Business Media Deutschland GmbH, 2023) Ashwani Kumar Sonkar; Ramita Varshney; Ashish Kumar Vishwakarma; Aarif Jamal; Saurabh Kumar Barman
The present research was carried out for delineation of groundwater potential zones in the Singrauli coalfield utilizing combined application of remote sensing, GIS and multi-influencing factor techniques (MIF). The groundwater potential zones (GWPZ) were delineated using six thematic layers like lineament density, land use–land cover (LULC), geology, drainage, slope, and soil. Various tools of ArcGIS were used to digitize and convert these thematic maps into raster data. In addition to it, MIF technique was used to assign fixed score and weight to the components of these raster maps. Furthermore, each weighted thematic layer was statistically calculated to get the GWPZ. The obtained resulting GWPZ were classified into four classes, namely very good, good, very poor, and poor. The groundwater potential zone map indicated very good to good groundwater potential in the plains including cropland, while gentle to moderate slope was found in Talchir and Barakar formation as well as in the pediplains. The LULC, slope and geology have played a major role in the formation of very good groundwater potential zone. Poor to very poor groundwater potential was found in and around the mining area, forest/hilly area with a steep slope, metamorphic terrain and built-up area. These findings may further help the local authorities for enhancing groundwater resource planning in the study area. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
Effect of Seasonal and Meteorological Variability of Air Pollution in Singrauli Coalfield
(Springer, 2022) Akhilesh Kumar Yadav; Saba Shirin; Christina Emmanouil; Aarif Jamal
Singrauli coalfield is an intensely industrialized area in India, where coal mining takes place. The air quality parameters of particulate matter (PM) ≤ 2.5 µm, ≤ 10 µm, total suspended particles (TSP) (≤ 100 µm), NO2 and SO2 at mining and residential sites in this area have been monitored for 2 consecutive years (2016 and 2017). Concentration of particulate matter of both sizes (≤ 2.5 µm, ≤ 10 µm) was high at all sites and this is due to sources such as mining activities, incineration, and traffic. For all monitored air pollutants higher values were recorded in winter season than in summer and the rainy season. It is possible that meteorological factors such as wind speed and rainfall reduced ambient air pollution. Vertical variation of pollutants was recorded in the Dudhichua industrial–residential area. Higher ground level values for PM10, TSP and NO2 were recorded as it has also been noted in other high traffic areas. In general, the observed air quality parameters concentrations were slightly above the National Ambient Air Quality Standards of India. These results highlight the degraded air status in areas hosting both active coalfields and coal-burning facilities and as such the need for pollution abatement measures. © 2022, The Author(s) under exclusive licence to Institute of Earth Environment, Chinese Academy Sciences.
Occurrence, mobility, leaching, and recovery of rare earth elements and trace elements in Sohagpur Coalfield, Madhya Pradesh, India
(Taylor and Francis Ltd., 2023) Prashant Modi; Aarif Jamal; Ramita Varshney; Ishwar Chandra Rahi
Coal and its by-product are considered a promising resource for the critical elements and rare earth elements (REEs). The study of REEs in coal is in its infancy. Many research methods have tried to recover these valuable REEs, but those methods can be complicated and difficult to apply on an industrial scale. This research work identifies the importance of REEs and its extraction from coal by leaching method. This experimental leaching method has recovered more than 50% of REEs, and for some metals, the recovery value goes up to 90%. Leachate also shows the mobility of trace elements, which can be harmful to the environment. These trace elements need to be removed after burning of coal in thermal power plants. So, this experimental method does the recovery of REEs and trace elements simultaneously. © 2022 Taylor & Francis Group, LLC.
Rare earth elements mobility, leaching and recovery by different chemicals treatment on coal samples and calcined samples of Sohagpur Coalfield, Madhya Pradesh, India
(Taylor and Francis Ltd., 2023) Prashant Modi; Aarif Jamal; Ramita Varshney; Ishwar Chandra Rahi; Mohd Adil Siddiqui
Coal and its by-product are considered a promising resource for the critical elements and rare earth elements (REEs). Due to the increasing criticality of REEs, recovering REEs from alternative resources has become essential. This research work identifies the importance of REEs and their extraction from coal, shaly coal and calcined material by leaching method. This work aims to understand the REEs recovery from raw samples (containing coal samples and shaly coal samples) and calcined material by acidic or basic solution leaching. The acid was taken in experimental leaching is Sulfuric acid (H2SO4). The base was taken here in experimental work is Sodium Hydroxide (NaOH) in leaching. Highest recovered element is Cesium which has a concentration of 73,000 ppb in collected solution after leaching, and the average concentration of REEs is 12,711 ppb after leaching. The calcined samples have given 1.5 times more recovery of REEs than normal samples in the leachate of acidic leaching. Experimental results showed that the recovery of REEs, especially LREEs, can be improved by using acidic leaching. It also depicts that the most effective recovery of REEs was from calcined coal material by acidic leaching. © 2022 Taylor & Francis Group, LLC.