Browsing by Author "Gayathri, N S"

Now showing 1 - 3 of 3

BIOSORPTION OF DIVALENT ION ONTO TREATED PROSOPIS JULIFLORA BARK FROM AQUEOUS SOLUTIONS - ISOTHERMAL AND STATISTICAL ANALYSIS
(Oriental Journal of Chemistry, 2016-04-13) Muthulakshmi Andal, N; Charulatha, S; Gayathri, N S
The present work emphasizes the utilization of Prosopis juliflora bark, an agro waste material for the adsorption of Cu(II). The raw Prosopis juliflora bark (PJB) is treated using 0.1N hydrochloric acid to enhance the sorption efficiency. The characterization studies of TPJB using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDAX), Brunauer-Emmet-Teller(BET) and Barrett-Joyner-Halenda (BJH) analyses carried out. The batch mode experimental set up is verified to assess the sorption capacity of the chosen material for the operating factors viz., particle sizes/ doses of the sorbent material upon a range of initial concentrations of Cu(II) at different temperatures, agitation time and pH of the Cu(II)- TPJB system. The amount of Cu(II) ion adsorbed on to TPJB surface is found to be 43.11 mg/g (97.4%) under optimized conditions, its efficiency 3 fold times more than the Ce values reported by other researchers. The sorption characteristic of TPJB is quantitatively estimated through column experiments based on the C value by batch mode. The removal is observed as 98%. Langmuir, Freundlich and Tempkin isothermal curves at various initial concentrations are plotted for Cu(II)-TPJB system wherein the straight line fit is best suited for the Freundlich isotherm model. The results show that the response of TPJB in trapping Cu(II) ions are influenced by various parameters being statistically verified using SPSS software, indicative of good correlation.
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.
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.