Browsing by Author "Sudhir Kumar Pandey"

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Concentrations of heavy metals and aquatic macrophytes of Govind Ballabh Pant Sagar an anthropogenic lake affected by coal mining effluent
(2008) Virendra Kumar Mishra; Alka Rani Upadhyay; Sudhir Kumar Pandey; B.D. Tripathi
Five heavy metals Cu, Cd, Mn, Pb and Hg were found in high concentration from three sampling sites located in Asia's largest anthropogenic lake Govind Ballabh Pant GBP Sagar. Concentrations of these heavy metals were measured in Water, bottom sediment and in different parts of the aquatic macrophytes collected from the reservoir. Plants collected from the lake were Eichhornia crassipes, Azolla pinnata, Lemna minor, Spirodela polyrrhiza, Potamogeton pectinatus, Marsilea quadrifolia, Pistia stratiotes, Ipomea aquqtica, Potamogeton crispus, Hydrilla verticillata and Aponogeton natans. These plants have shown the high concentrations of Cu, Cd, Mn, Pb and Hg in their different parts due to bioaccumulation. In general plant roots exhibited higher concentrations of heavy metals than corresponding sediments. A comparison between different morphological tissues of the sampled plants reveled the metal concentration in following order roots > leaves. Analyses of bottom sediment indicated the higher concentrations of Cd, Mn, Cu and Pb. Strong positive correlations were obtained between the metals in water and in plants as well as between metal in sediment and in plants. Indicating the potential of these plants for pollution monitoring of these metals. © Springer Science+Business Media B.V. 2007.
Dust deposition in a sub-tropical opencast coalmine area, India
(Academic Press, 2008) Sudhir Kumar Pandey; B.D. Tripathi; Virendra Kumar Mishra
This paper provides baseline information about the total annual dust fall, and its constituents and seasonal variation, from a sub-tropical opencast coalmine area in Bina, India. Dust samples were collected monthly for 2 years (June 2002-May 2004) from five sampling sites in the region and analyzed in the laboratory for water-soluble and -insoluble matter. Water-insoluble components constituted the major fraction of the total annual dust fall. Two-way ANOVA indicated significant variations in dust fall at different sites, over the months and in their interactions. The dust deposition rate was highest during summer (March-June), followed by winter (November-February) and lowest in the rainy season (July-October). Maximum dust fall was observed near the coal handling plant (at site 2) followed by the receiving pit of the coal handling plant (site 3), near the main sub-station (site 4), Jawahar colony (site 1) and Gharasari village (site 5). An inverse and significant relation was observed between dust fall and precipitation. Our studies have shown that the main residential areas are experiencing higher levels of dust fall which makes them unsuitable for living. We suggest that residential areas should be moved farther away from the mining area in the opposite direction of prevalent winds. © 2007 Elsevier Ltd. All rights reserved.
Heavy metal pollution induced due to coal mining effluent on surrounding aquatic ecosystem and its management through naturally occurring aquatic macrophytes
(2008) Virendra Kumar Mishra; Alka Rani Upadhyaya; Sudhir Kumar Pandey; B.D. Tripathi
Three aquatic plants Eichhornia crassipes, Lemna minor and Spirodela polyrhhiza were used in laboratory for the removal of heavy metals from the coal mining effluent. Plants were grown singly as well as in combination during 21 days phytoremediation experiment. Results revealed that combination of E. crassipes and L. minor was the most efficient for the removal of heavy metals while E. crassipes was the most efficient in monoculture. Significant correlations between metal concentration in final water and macrophytes were obtained. Translocation factor i.e. ratio of shoot to root metal concentration revealed that metals were largely retained in the roots of aquatic macrophytes. Analytical results showed that plant roots have accumulated heavy metals approximately 10 times of its initial concentration. These plants were also subjected to toxicity assessment and no symptom of metal toxicity was found therefore, this method can be applied on the large scale treatment of waste water where volumes generated are very high and concentrations of pollutants are low. © 2007 Elsevier Ltd. All rights reserved.
Magnetic properties of vehicle-derived particulates and amelioration by Ficus infectoria: A keystone species
(Royal Swedish Academy of Sciences, 2005) Sudhir Kumar Pandey; B.D. Tripathi; Santosh Kumar Prajapati; Virendra Kumar Mishra; Alka Rani Upadhyaya; Prabhat Kumar Rai; Atul Prakash Sharma
[No abstract available]
Medicinally important constituents of tulsi (Ocimum spp.)
(Elsevier, 2018) Rashmi Dubey; Sudhir Kumar Pandey
The medicinal potential of a highly important Indian medicinal plant Tulsi (Ocimum spp.) has been evaluated with respect to isolation of bioactive agents, the synthesis of important derivatives, and the bioactivity of isolated/synthesized derivatives toward cure of various human ailments. To this end, isolation strategies for important bioactive agents from different parts of this plant have been emphasized that includes essential oils, eugenol, ursolic acid, etc. Then, the efficacy of different synthetic schemes of important derivatives of these isolated bioactive compounds has been discussed and critically evaluated. Finally, the bioactivity potential of important compounds/derivatives of Tulsi has been evaluated against several diseases and health problems such as immunomodulatory effects, cardiovascular disease risk factors, antidiabetic property, stress resilience, headache treatment and psychological disorders, against kidney stones, antiinflammatory disorders, antimicrobial, antifertility effect, antioxidant activity, anticoagulant activity, thyroid activity, respiratory disorders, toothache, antiulcerogenic, and for nutrient as well. At the end, the current status of research on Tulsi and its importance as medicine for a number of health problems has been critically assessed and future perspectives are highlighted. © 2018 Elsevier Ltd. All rights reserved.
Monitoring of vehicles derived particulates using magnetic properties of leaves
(2006) Santosh Kumar Prajapati; Sudhir Kumar Pandey; B.D. Tripathi
Biomonitoring of vehicle-derived particulates is conducted by taking magnetic measurements of roadside tree leaves. Remanent magnetization (IRM300mT) of more than 400 Delbergia sissoo leaves was determined and IRM300mT normalized for the leaf area. The normalized 2-D magnetization as shown by results is dominantly controlled by the tree's distance to the road. The spatial and temporal variations of vehicle-derived particulates were mapped using magnetic analysis. 2D-magnetizations values were higher for leaves collected adjacent to major road sections than for those from village road suggesting vehicle emissions, rather than resuspended road dust, as the major cause of magnetic particles of roadside tree leaves. Vehicles derived particulates are responsible for tree leaf magnetism, and the leaf magnetizations values fall significantly from high values proximal to the roadside to lower values at the distal side. This suggests the ability of trees to reduce particulates concentrations in the atmosphere. The rainfall produces a net decrease in the leaf magnetic dust loadings. © Springer Science+Business Media, Inc. 2006.