Browsing by Author "Krishna, Vijai"

Now showing 1 - 6 of 6
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    Air Pollution Tolerance Index (APTI) and Expected performance index (EPI) of Selected Plants at RGSC, (BHU), Mirzapur, India
    (University of Tehran, 2022) Pandey, Anil Kumar; Krishna, Vijai; Kumar, Manish
    This study carries the evaluation of tolerance of sixteen plants against pollution. These plants have been selected and assessed for several phyto-socio-economic (tree height, canopy, type of tree, laminar structure, hardiness and economic value) and biochemical qualities (pH, Relative water content (R), Ascorbic acid (AA), Chlorophyll a (Chl a), (Chl b), Carotenoids (Car) and total Chlorophyll (TC)) and tested for Air pollution tolerance index (APTI) and Expected performance Index (EPI) and then EPI score used as grades of plants (Not Recommended, Very poor, Poor, Moderate, Good, Very good, Excellent and Best Plus Plant). Statistical analysis tool like correlation matrix among plant parameters and ANNOA test has been applied to understand the relationship among plant parameters and plant species. The best EPI score means best suited plant for the area for plantation and green belt development while plant with lower EPI may be used as bioindicators for the pollution because they are very sensitive for the air pollution. � 2022 Pollution. All rights reserved.
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    Generation, Composition And Management Of Waste Generated Along The Riverfronts (Ghats) Of River Ganga In Varanasi City, India
    (Kalpana Corporation, 2021) Krishna, Vijai; Maurya, Sweta Singh; Soren, Chameli; Gupta, Tanya
    Varanasi is one of the most famous cities for its riverfronts and religious and cultural activities carried on there in India. There are 86 riverfronts (ghats). This research work assessed the sources, composition, effects, management and disposal aspects of solid waste produced at nine selected most prominent riverfronts of Varanasi. It has been seen that nine selected riverfronts generated 1880.7 kg waste per day in which flower waste was highest, that is 893.4 kg (47.5%) followed by plastic 499.4 kg (26.55%), paper 305.2 kg (16.22%), cloths 98.7 kg (5.24%) and glass 84 kg (4.46%) wastes. Whereas Manikarnika generated 6000 kg ash and Harishchandra 850 kg ash per day, respectively. At 86 ghats, the number of shops, temples and dustbins is 158, 113 and 244, respectively. To clean 86 ghats, 600 workers work regularly from 6 AM to 10 PM and 20 supervisors supervise them. Management potentials include the production of vermicomposting, composting, extraction of natural dyes, essential oils, biogas generation, incense sticks, rose water and handmade paper. Most of the waste is disposed of at the Karsada waste processing plant. � 2021 - Kalpana Corporation
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    Heavy metals in sludge produced from UASB treatment plant at Mirzapur, India
    (University of Tehran, 2021) Krishna, Vijai; Pandey, Anil Kumar; Gupta, Pankaj Kumar
    In Mirzapur (U.P.), a power-starved district, the UASB (Upflow Anaerobic Sludge Blanket) technique was adopted. Almost all of the available technologies do not treat heavy metals, so, is the case with the UASB also. The present study is to assess how much heavy metal can get accumulated in plant tissues in different species. The result of the present study was that the concentration of Pb(1106.31)>Zn(221.45)>Cd(49.26)>Hg(23.37) mg/Kg in the sludge while the concentration of Zn(93.35)>Pb(52.00)>Hg(16.93)>Cd(1.53) mg/Kg in the soil. When the sludge was mixed with the soil the trend got changed and the trend was Pb(596.36)>Zn(219.86)>Cd(24.70)>Hg(22.63) mg/Kg. Three different species that were chosen for the study were Basella Alba (Spinach), Solanum Lycopersicum (Tomato) & Brassica Juncea (Mustard). The trend of accumulation of studied heavy metals in the Brassica Juncea (Mustard) was Zn(85.33)>Pb(25.88)>Hg(11.23)>Cd(0.99) mg/Kg. In Solanum lycopersicum (Tomato) the trend was Pb(231.11)>Zn(108.72)>Hg(12.43)>Cd(9.41) mg/Kg and in Basella alba (Spinach) was Zn(103.81)>Pb(83.90)>Hg(10.78)>Cd(4.18) mg/Kg. Overall the study reveals that the accumulation of heavy metals takes place in plants grown in soil mixed with sewage sludge. The reduction in the concentration of Pb, Cd, Hg and Zn in sludge mixed with soil after the harvesting of plant in case of Solanum lycopersicum were 39.38%, 47.93%, 6.18% and 49.89% respectively; while in case of Basella alba these were 25.23%, 57.53%, 71.58% and 49.16% respectively; and in case of Brassica Juncea these reduction were 25.86%, 60.80%, 70.96% and 49.04% respectively. � University of Tehran
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    Sustainable plant nutrition and soil carbon sequestration
    (Nova Science Publishers, Inc., 2022) Dwivedi, Brajesh K.; Srivastava, Ashutosh K.; Krishna, Vijai
    During the last 200 years, increasing anthropogenic activities have substantially increased the level of atmospheric carbon. Because of their significance in the earth's carbon cycle, mechanisms regulating carbon fixation in soils have received a lot of attention in recent years. Two-thirds of the planet's terrestrial organic carbon deposits are stored in soils as terrestrial carbon pools. Soil organic carbon has a gradual turnover pattern in terrestrial ecosystems and thus there is a massive possibility to capture atmospheric CO2 in soil ecosystems. Depending upon soil management practices it can be served as a cause or sink for atmospheric CO2. Sustainable management systems and practices such as conservation agriculture, agroforestry, and application of biochar are emerging and promising tools for soil carbon sequestration. Increasing soil carbon storage in a system simultaneously improves soil health by increasing infiltration rate, soil biota and fertility, nutrient cycling, and decrease in soil erosion process, soil compaction, and carbon emissions. As a consequence, it is necessary to research the processes governing carbon flux in soils, which are poorly defined in diverse environments under anthropogenic interventions, thereby establishing soil as a potential sink for atmospheric CO2 and limiting climate change. Therefore, the present chapter aims to review the basic mechanism leading to carbon stabilization in soils and new practices and technological developments in agricultural and cropland sciences for carbon sequestration. � 2022 Nova Science Publishers, Inc..
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    The restoration of wastelands: Methods of landfill reclamation
    (Nova Science Publishers, Inc., 2023) Krishna, Vijai
    Any land not suitable for any use is commonly known as wasteland. A large part of India comes under different categories of wasteland. These classifications generally do not include the landfill as a wasteland but due to the inherent nature of landfills, these areas also act like a wasteland. This paper is about the understanding of the description of basic characteristics, spatial extent and classification of wasteland so that to understand that the landfills should also be considered as wasteland. Landfill creates several types of environmental as well as socio-economic problems too. The leachate created within landfill contaminates the underground water resources. The gas generated within landfill pollutes the nearby atmosphere. The landfill also acts as a breeding place for vectors of infectious diseases. Landfill fire, landfill slide, and landfill subsidence are also great hazards. Overall, this paper summarizes the methods of waste management, types of landfills and the methods of landfill reclamation with its benefits and drawbacks. Landfill reclamation can transform a wasteland into a potentially useful place for commercial or recreational activities. Major methods of landfill reclamation include photocopying, landfill mining, in-situ aeration, Landfill surcharging, Soil vapor extraction and air sparging, treatment of landfill leachate, etc. � 2023 Nova Science Publishers, Inc.
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    Toxicity-removal efficiency of Brassica juncea, Chrysopogon zizanioides and Pistia stratiotes to decontaminate biomedical ash under non-chelating and chelating conditions: A pilot- scale phytoextraction study
    (Elsevier Ltd, 2022) Rena; Machhirake, Nitesh Premchand; Yadav, Shraddha; Krishna, Vijai; Kumar, Sunil
    The healthcare community acknowledged that bio-medical wastes (BMWs) have reached a colossal level across the globe. The recent pandemic (COVID-19) has brought a deluge of contaminated waste which calls for an urgent need of treatment technology for its safe disposal. BMW generally undergoes a conservative treatment approach of incineration which in turn generates potentially toxic ash known as BMW ash. BMW ash, if directly dumped in landfill, leaches and further pollutes both land and groundwater. The present study deployed Brassica juncea [Indian Mustard (IM)], Chrysopogon zizanioides [Vetiver Grass (VG)], and Pistia stratiotes [Water Lettuce (WL)] to remediate toxicity of potentially toxic elements (PTEs) i.e., Cd, Al, Pb, Cu, Mn, Co and Zn in BMW ash both in the presence and absence of chelate with an increased dosage of toxicity. The phyto-assessment results showed that IM extracted 202.2 � 0.1�365.5 � 0.02, 7.8 � 0.03�12.5 � 0.3, 132.1 � 0.1�327.3 � 0.1 and >100 mg kg?1 of Al, Cd, Pb and Zn, respectively without the assistance of a chelating agent. The VG accumulated heavy metals in greater concentration up to 10.5 � 0.1 and 290.1 � 0.05 mg kg?1 of Cd and Zn, respectively, and similar trends were observed in the WL set-up. However, the application of an ethylene diamine tetraacetic acid (EDTA) had also increased the efficiency on an average by 20�30% for IM, 35�45% for VG, and 25�35% for WL. The experimental set-up shows that the BCF for IM, VG and WL was found to be greater than 1 for most of the PTEs. The higher value of BCF resulted in a better ability to phytoextract the heavy metals from the soil. The results suggested that IM, VG and WL have the potential to phytoextract PTEs both in the absence and presence of chelating agents. � 2021 Elsevier Ltd