Browsing by Author "Anuradha, J"

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    EMPLOYMENT OF SURFACE MODIFIED BIOMATERIAL IN SEQUESTERING DIVALENT METAL ION
    (EnvironmentAsia, 2019) Anuradha, J; Muthulakshmi Andal, N
    The study is designed to investigate the potential applicability of Nano sized Treated Goat Teeth (NTGT) as adsorbent for Ni(II) removal from metal laden solutions. The desized novel nanomaterial (NTGT) is characterized by AFM and TGA- DTA techniques. Batch Equilibration study is carried out for Ni(II)- NTGT system under varied influential parameters viz., dosage, agitation time intervals, optimized initial metal ion concentration (250 mg/L), pH (5.5) and temperature (303K). The results of the experiment registered a two fold increase in the removal of Ni(II) from aqueous media with one half amount of required dose and agitation time interval in comparison with that of the counterpart TGT. High performance of NTGT in trapping Ni(II) ions is extended to field trials by treating electroplating effluent samples collected from Coimbatore industrial belt, the results suggesting the derived NTGT as an efficient biosequestrant.
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    AN INVESTIGATION APPROACH ON THE SEQUESTRATION OF DIVALENT METAL IONS EMPLOYING ANIMAL WASTE
    (Oriental Journal of Chemistry, 2017-04-23) Gayathri, N S; Muthulakshmi Andal, N; Anuradha, J
    The current investigation deals with utilizing Treated Goat Hoof (TGH), a no cost material derived from butcher shop for the removal of Pb(II) and Cd(II) ions from aqueous media. FTIR / SEM analyses are carried out for the functional groups identification and describe the surface morphology of the chosen material respectively. Batch studies are experimented under varied operating factors viz., particle size, dosage, initial concentration, contact time and pH of the medium to assess the sorptive nature of the chosen material. Verification of the experimental data reveal the optimized conditions for the uptake of Pb(II) and Cd(II) by TGH. Langmuir model registered the best linearity amongst the isothermal plots derived for Langmuir, Freundlich and Tempkin models. Experimental results of both the systems: Pb(II) – TGH and Cd(II)- TGH are subjected to Statistical tool analyses using SPSS 20 software for significance and correlation assessment.
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    A STUDY ON THE BIOACCUMULATION AND SCREENING OF TOXIC METAL IONS IN EFFLUENTS, FODDER AND MILK SAMPLES COLLECTED FROM ERODE, TIRUPUR, COIMBATORE DISTRICTS
    (Research Journal of Chemistry and Environment, 2020) Anuradha, J; Gayathri, N S; Muthulakshmiandal, N
    Water pollution is a serious problem of concern due to the potential health impacts of bioaccumulation in the food chain. Based on this fact, a field study is conducted in the areas of three major polluting industries viz. dyeing, tannery and plating located at Coimbatore, Tirupur and Erode pertaining to ground water table contamination due to heavy metals from industrial discharges. The outcome of the field study formed a baseline to investigate the accumulation of toxic metal ions: Cd, Cu, Zn, Pb, Fe, Co, Cr, Mn and Ni in the effluent, fodder and milk samples. A marked extremity of pollution is recorded against lead and chromium concentrations in comparison to WHO permissible limits for effluents, diminishing reflecting in the inherent increase of 7 and 5 fold times for fodder/ milk samples. Also, reclamation studies are performed using naturally occurring eco-friendly materials to minimize the extent of pollution in all the chosen samples. The analysis and assessment of the results conclude that thus the materials possess excellent metal chelating ability and serve as better choice in the heavy metal bioaccumulation by treating the effluents even before being discharged into the soil environment.
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    SYNTHESIS, CHARACTERISATION AND UTILISATION OF MAGNETIC FE3O4 – TGT NANOCOMPOSITE IN THE REMOVAL OF PB(II) FROM AQUEOUS SOLUTIONS
    (Asian Journal of Water, Environment and Pollution, 2023-01-23) Anuradha, J; Muthulakshmi Andal, N
    Magnetic Adsorption Separation (MAS) method is an ideal substitute for the environmental clean-up process. Magnetic material embedded with natural litter material is a facile route to achieve maximum adsorptive ability at a lower dosage, contact time and increased chance of metal-laden adsorbents’ recovery from aqueous matrices. In the present study, the synthesis of Fe3O4–TGT composite (TGT- C2) by the auto combustion method and its employment for Pb(II) removal from aqueous solutions is discussed. TGT- C2 is characterised using VSM (Vibrating Sample Magnetometer), SEM (Scanning Electron Microscope), Particle Size Analyzer, EDAX (Energy Dispersive X-ray Spectrometer) and FTIR (Fourier Transform Infra Red Spectrophotometer) techniques. TGT- C2 is found to be magnetic in nature and their saturation magnetization (Ms)/ Coercivity (Hc) values are calculated as 1.54 emu g-1/139.83 G, respectively, being less than bare Fe3O4. The synthesised nanocomposite registered a maximum of 98% sequestration of Pb(II) ions under the optimised conditions of 100 mg/L initial metal ion concentration, 10 min agitation time, 50 mg dosage and pH 5 environment. Isothermal verification, the kinetics of adsorption and successive desorption/ regeneration cycles were performed. The outcomes support the preparation of bio-nanocomposites from animal waste was successful in the efficient trapping of divalent metal ions.