Department Of Environmental Science And Technology

Permanent URI for this community

http://10.2.3.109/handle/32116/84

Browse

Browsing Department Of Environmental Science And Technology by Author "Anil, Amith G."

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Multifunctional nanohybrid for simultaneous detection and removal of Arsenic(III) from aqueous solutions
    (Elsevier Ltd, 2021-12-01T00:00:00) Singh, Simranjeet; Khasnabis, Sutripto; Anil, Amith G.; Kumar, Vijay; Kumar Naik, TS Sunil; Nath, Bidisha; Garg, Vinod Kumar; Singh, Joginder; Ramamurthy, Praveen C.
    Herein, for the adsorption and detection of As (III), multifunctional nanohybrid have been synthesized using a solvothermal approach. Structural and functional characterizations confirmed the impregnation of the ZnO over graphene oxide. Nanohybrid exhibits a remarkable qmax (maximum adsorption capacity) of 8.17 mg/g, at an adsorbent dose of 3 g/L and pH of 8.23. Higher adsorption with nanohybrid was attributed to a large BET surface area of 32.950 m2/g. The chemical nature and adsorption behaviour of As(III) on ZnO-GO were studied by fitting the data with various adsorption isotherms (Langmuir & Freundlich) and kinetics models (six models). It is observed from the findings that removal of As(III) with ZnO-GO nanocomposite appears to be technically feasible with high removal efficiency. The feasibility of the nanocomposite to function as a sensor for the detection of As(III) was also evaluated. The fabricated sensor could detect As(III) with a lower limit of detection of 0.24 ?M and linear range up to 80 ?M. Overall, this study is significant in nanohybrid as a multifunctional composite for the adsorption and detection of As (III) from wastewater. � 2021 Elsevier Ltd
  • No Thumbnail Available
    Item
    A novel CaO nanocomposite cross linked graphene oxide for Cr(VI) removal and sensing from wastewater
    (Elsevier Ltd, 2022-04-27T00:00:00) Singh, Simranjeet; Naik, T.S. Sunil Kumar; Anil, Amith G.; Khasnabis, Sutripto; Nath, Bidisha; U, Basavaraju; Kumar, Vineet; Garg, V.K.; Subramanian, S.; Singh, Joginder; Ramamurthy, Praveen C.
    A novel green nanocomposite has been prepared by immobilizing CaO nanoparticles (CaO NPs) on the surface of graphene oxide. Biogenic CaO-NPs were synthesized from Lala clamshells. Morphological and structural characterizations of the nanocomposite were studied extensively. The adsorption capacity (qmax) of the nanocomposite for removing Cr(VI) was 38.04 mg g?1. In addition to this, the adsorption data were adequately simulated with Langmuir, Freundlich, Temkin, and pseudo-second-order models, suggesting that the adsorption process was the combination of external mass transfer and chemisorption. Electrostatic interaction was the dominant mechanism for Cr(VI) removal. In addition, the synthesized nanocomposites also serve as an excellent sensor for Cr(VI) sensing, with a limit of detection (LOD) of 0.02 ?M utilizing electrochemical methods. Therefore, this green nanocomposite can simultaneously serve as an adsorbent and sensor for Cr(VI)removal from aqueous solutions. � 2022 Elsevier Ltd