Conference Papers

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    Experimental Transient Analysis of Radial Flow Clay Desiccant Packed Bed
    (Springer Science and Business Media Deutschland GmbH, 2021) Boche, A.; Kadoli, R.
    In this work, an experimental investigation on the desiccant bed with radial flow is discussed. The spherical clay balls with the average diameter of 11 mm is used as desiccant in the radial bed. Two sizes of radial test section are developed based on the diameter of the inner cylinder and outer cylinder. The diameter ratio is evaluated based on the space needed to accommodate the spherical clay desiccant as a single layer and two layered. For the present work, the behavior of 850 g of clay desiccant in the single layer and double layer radial packed bed is being compared. Both the experimental test units were kept at nearly same relative humidity during the process of adsorption and nearly same temperature during desorption process. The parameters such as exit air humidity, exit air temperature, mean bed temperature during the process of adsorption, and desorption are being compared. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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    A Study on Aquaculture Waste Leachate Transport Through Soil
    (Springer Science and Business Media Deutschland GmbH, 2023) Thotakura, T.V.; Sunil, B.M.; Chaudhary, B.
    Aquaculture waste is one of the emerging wastes due to rapid expansion and intensification of aquaculture practices and less attention has been paid for environmental concern as compared with municipal waste. Moreover, in the delta region of Andhra Pradesh, nearly one-third of the land cover is occupied by the aquaculture ponds. Major contaminants in aquaculture ponds are rich in nutrients, chemicals, disinfectants, feed residues, metals, minerals, and nitrates. This paper presents the aquaculture waste leachate and clay interaction. Our findings revealed that ammonia interaction with the clay particles significantly influence the hydraulic behavior of the clays. Further, long-term clay-leachate interactions lead to negative environmental consequences. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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    Green Synthesis of Zinc Oxide Nanoparticles and Study of Its Adsorptive Property in Azo Dye Removal
    (Springer Science and Business Media Deutschland GmbH, 2023) Anupama, C.; Shrihari, S.
    Dyes are important colouring chemical compounds widely used in textile, paper, food, cosmetics and pharmaceutical industries. Most of the dyes are highly toxic and potentially carcinogenic. Exposure to high doses of these compounds can have severe effects in the human body. When untreated dye effluents are directly discharged into water bodies it leads to water contamination. Adsorption is an efficient method for the dye removal. It is also an economical technique. Green synthesis helps in the production of cost-effective and ecofriendly adsorbent. In this paper, green-synthesized zinc oxide nanoparticles were widely used for the removal of azo dye; methyl orange. Zinc oxide nanoparticles (ZnO NPs) were synthesized using Plectranthus Amboinicus leaf extract. The structure of nanoparticles was visualized using Field Emission Scanning Electron Microscope (FESEM). Nanoparticles due to their small size and thus large specific area are strong adsorbents. The effect of various parameters like dye dosage, zinc oxide nanoparticle loading, pH and contact time was evaluated. In batch adsorption study, maximum removal efficiency of 85.41% was obtained with zinc oxide nanoparticle dosage of 3 g initial dye concentration of 10 mg/l, pH 6 and contact time of 3 h. Adsorption parameters fitted well in the Langmuir isotherm model with a correlation coefficient (R2) of 0.975. Adsorption kinetic studies revealed that adsorption strongly followed pseudo-second order. This paper suggests a safe, economical and environment-friendly technique for the removal of azo dyes. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.