Browsing by Author "Kataria, N."

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    Assessment of uranium concentration in the drinking water and associated health risks in Eastern Haryana, India
    (Taylor and Francis Inc., 2018) Daulta, R.; Singh, B.; Kataria, N.; Garg, V.K.
    Quantification of uranium in drinking water has great significance considering its effects on human health. Drinking water samples collected from different sources, viz., hand pumps, tube-wells, and public water supply from Sonipat and Panipat districts of Haryana, India have been analyzed for uranium and other physico-chemical parameters. Uranium concentration in water samples was measured using Pulsed LED Fluorimeter. Uranium concentration in collected water samples ranges from 9.1 to 155.1 ?g/L in Sonipat district and 14.9 to 123.3 ?g/L in Panipat district. It was inferred from the data that uranium concentration in some water samples was higher than WHO & USEPA recommended limit of 30 ?g/L. The mean cancer risk due to uranium in drinking water in Sonipat and Panipat districts was found to be 1.40 ? 10?4 and 1.63 ? 10?4, respectively, which is lower than the maximum permissible limit (<10?3). Total Dissolve Salts (TDS) in water samples of some villages in Sonipat district was higher than permissible limits for drinking prescribed by WHO & BIS. ? 2018 Taylor & Francis Group, LLC.
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    Preparation, characterization and potential use of flower shaped Zinc oxide nanoparticles (ZON) for the adsorption of Victoria Blue B dye from aqueous solution
    (Elsevier B.V., 2016) Kataria, N.; Garg, V.K.; Jain, M.; Kadirvelu, K.
    In present work, the performance and effectiveness of flower-shaped Zinc oxide nanoparticles (ZON) synthesised by hydrothermal method was evaluated for the adsorption of Victoria Blue B (VB B) dye from aqueous solution. ZON were characterised by using XRD, FTIR, SEM, EDX and DLS. Batch mode adsorption experiments were carried out to optimise the process conditions viz., pH, adsorbent dose, dye concentration, temperature, etc. The adsorption of cationic dye onto ZON surface was illustrated by Langmuir and Temkin isotherm models. The mechanism of dye adsorption onto the nanoparticles was explained by pseudo-second order kinetic model (R2???0.997). The thermodynamic parameters including Gibb's free energy (?G0), enthalpy (?H0), and entropy (?S0) were studied at different temperatures (10?70??C). The maximum adsorption capacity of VB B dye onto ZON was achieved up to 163?mg/g at pH 6.0 and temperature 27???1??C. ? 2016 The Society of Powder Technology Japan
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    Removal of Congo red and Brilliant green dyes from aqueous solution using flower shaped ZnO nanoparticles
    (Elsevier Ltd, 2017) Kataria, N.; Garg, V.K.
    This work reports preparation and characterization of ZnO nanoparticles prepared by low temperature hydrothermal methods and their application for anionic dye (Congo red) and cationic dye (Brilliant green) removal from aqueous medium. The adsorption capacity of ZnO nanoparticles for Congo red dye and Brilliant green dye was up to 71.4 and 238 mg/g, respectively under selected process conditions. Dye adsorption behaviour has been explained applying different isotherms. Freundlich isotherm model best fitted to the dye removal data. Adsorption kinetics of both dyes is well explained by pseudo-second order model. Physical adsorption has been investigated using thermodynamic parameters viz., Gibb's free energy (?G?), enthalpy (?H?) and entropy (?S?). The reusability of ZnO nanoparticles was examined upto three cycles. ? 2017 Elsevier Ltd. All rights reserved.
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    Removal of Orange G and Rhodamine B dyes from aqueous system using hydrothermally synthesized zinc oxide loaded activated carbon (ZnO-AC)
    (Elsevier Ltd, 2017) Saini, J.; Garg, V.K.; Gupta, R.K.; Kataria, N.
    This study reports the synthesis of zinc oxide loaded activated carbon (ZnO-AC) using hydrothermal method and its use to remove organic dyes [Orange G (OG) and Rhodamine B (Rh-B)] from the aqueous system under varying process conditions. ZnO-AC nanoparticles were characterized using XRD, SEM, EDX, DLS, and FTIR. The Langmuir adsorption model was best fitted to the experimental data for both the dyes. Langmuir adsorption capacity (qmax) for OG and Rh-B was 153.8 and 128.2 mg/g, respectively. The rate of adsorption was investigated by various models namely pseudo-first-order, pseudo-second-order and intraparticle diffusion model. Rate mechanism was described by pseudo-second-order model for both the dyes. Thermodynamic studies suggested that removal of Rh-B onto ZnO-AC was endothermic up to a temperature of 40 ?C while OG removal decreased with increase in temperature. Negative values of ? G0 for adsorption of dyes suggested spontaneous adsorption processes. ? 2017 Elsevier Ltd. All rights reserved.