F-KCW-Department Publications
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Item TERMINALIA CATAPPA AS A NOVEL BIOSORBENT FOR THE REMOVAL OF DIVALENT ION FROM AQUEOUS SOLUTIONS: EXPERIMENTAL INVESTIGATION(2023-04-14) Muthulakshmi Andal N; Anuradha JThe effectiveness of acid-treated Terminalia catappa seed shell (TTCSS), an agricultural waste, for the adsorption of Cu(II) from aqueous solutions is highlighted in the current work. Adsorbent dose seems to have a great influence on sorption process. A significant risk to human health results from the Cu(II) effluent from industry spreading into the environment through soil and water streams and accumulating along the food chain. Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Analysis (EDAX) analyses are used to characterize TTCSS. For the Cu(II)- TTCSS system, batch equilibration method experiments were performed to determine the effect of operating factors such as particle sizes and doses of the adsorbent material, agitation time between the sorbent and the sorbate species, temperature, and pH of the medium. The following parameters have been shown to be the most effective for removing Cu2+ ions (92%) from an initial concentration of 8mg/L : 0.18 mm particle size, 50mg adsorbent dose, 60 min contact time and pH 7. It is discovered that the highest adsorption capacity (Ce) of Cu(II)(7.122mg/g) is higher than the range of 2.1-5.2 mg/g as documented by other researchers for various sorbent materials. This demonstrates Terminalia catappa's superior sorption capacity, when compared to the other materials under study.Item ADSORPTION OF COBALT IONS FROM AQUEOUS SOLUTIONS EMPLOYING TREATED FRUIT SHELLS OF TERMINALIA CATAPPA(BonfringTM, Gandhigram Rural Institute (Deemed University), 2013) Muthulakshmi Andal N; Charulatha SVarious modification procedures of Terminalia catappafruit shells were tried for the removal of Co(II) ions from aqueous solutions, where citric acid treatment showed prominent sorption capacity at pH 7 .Item SORPTION CHARACTERISTICS OF MODIFIED FRUIT SHELL ONTO ZN(II) IONS IN AQUEOUS MEDIA(Advances in Applied Research - PSGR Krishnammal College for Women, 2018) Muthulakshmi Andal N; Charulatha SThe present work was carried out to study the efficiency of acid treated fruit shell of Aegle marmelos (L.) Correa (TAMC), for the adsorption of Zn(II) from aqueous solutions. TAMC was characterized using Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDAX) analyses for the presence of functional groups, surface morphological changes in the chosen material and occurrence of absorption peak in the metal laden TAMC, respectively. Batch equilibration mode of experiments were carried out to assess the impact of the variable parameters viz., particle sizes and doses of the adsorbent material, predetermined time intervals between the sorbent and the sorbate species and pH of the medium. The optimized conditions for the maximum removal of Zn2+ ions (91.1%) from1000 mg L−1 initial concentration were 0.18 mm particle size, 1000 mg adsorbent dose, 10 min agitation time and pH 5.5. The applicability of Langmuir and Freundlich isotherms at various initial concentrations were plotted for Zn(II)-TAMC system wherein the best straight line was well suited for Langmuir model which indicated the monolayer adsorption. The maximum sorption capacity of TAMC was 80.45 mg g−1 as calculated from the equilibrium concentration data, which was observed to be substantially greater than the q (adsorption capacity at equilibrium) values reported employing different sorbent materials. The results revealed the fruit shell of Aegle marmelos (L.) Correa as a promising material with excellent metal removal capacity when compared to other sorbent materials.Item COLUMN OPERATIONS OF ZN(II)–MUSSEL SHELL POWDER SYSTEM EMPLOYING FIBRE REINFORCE POLYMER(PSG Institute of Advanced Studies, Peelamedu, Coimbatore, 2019-01) Muthulakshmi Andal N; Charulatha SEnvironmental protection emphasizes the use of ecofriendly materials instead of chemicals to minimize pollution. The present work deals with the utilization of acid treated Mussel shell powder(TMSP), an mollusc shell waste for the adsorption of Zn(II) from aqueous solutions. TMSP ischaracterized using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDAX), Brunauer-Emmet-Teller (BET) and Barrett-Joyner-Halenda (BJH) analyses to study the presenceof carboxylic, amino/ phenolic/ hydroxyl groups, surface morphology, elemental constitution,determination of surface area and pore structures. Batch equilibration studies are verified for theoperating factors viz., particle sizes/ doses of the sorbent material upon a range of initial aqueousconcentrations of Zn(II) at different temperatures, agitation time and pH of Zn(II) -TMSP system toassess TMSP sorption capacity. The maximum sorption capacity of TMSP is found to be 22.63 mg/gimplying its efficiency to be three fold times more than the reported Ce values for varied sorbentsby other researchers. Continuous column running for Zn(II) removal by TMSP from the bulk ofthe aqueous Zn(II) solution is estimated. The implications of the laboratory results are tested withelectroplating wastewaters collected from the industrial belt in Coimbatore district. Fibre ReinforcedPolymer is fabricated, packed with TMSP with specifications in column packing/flow rate of effluentsand installed at the effluent discharge plants where its performance indicated 100% Zn(II) removal.Item TREATED MUSSEL SHELL POWDER(BIVALVE MOLLUSCS) AS A NOVEL ECO-FRIENDLY BIOSORBENT: A COMPARATIVE STUDY ON OPTIMIZATION OF DIVALENTIONS(Anna Adarsh College for women, Chennai, 2015) Muthulakshmi Andal N; Charulatha SThe present study deals with the removal of Zn(II) and Cu(II) ions, both being prioritized pollutants of industrial effluents discharged from mining, metallurgical, electrical and electroplating into aqueous streams. Mussel Shell Powder (MSP), a novel sorbent is chosen for the removal of the selected divalent ions from aqueous solutions employing batch equilibration method. The excess alkaline nature of the collected MSP is reduced through neutralization by soaking it in 0. IN HCl for 4 hours. TMSP is characterized by Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis (EDAX).Batch equilibration method experiments pertaining to the study of variable parameters viz., particle sizes and doses of the adsorbent material, agitation time between the sorbent and the sorbate species, temperature and pH factors of the medium conducted for systems indicate that the sorption capacity is dependent on the operating variables The results revealed that the maximum percentage removal is 98.1 % for Zn(II) and 86. 3% for Cu(II) indicative of the best sorption efficiency of the animal waste.Item EXPERIMENTAL OPTIMIZATION OF AN AGRICULTURAL WASTE IN THE UPTAKE OF CU(II) IONS(Chemical Science Review and Letters (Aufau Periodicals), 2014) Muthulakshmi Andal N; Charulatha SThe potential of tamarind hull, a low cost agricultural waste, to remove copper ions from aqueous solutions is evaluated in a batch process. The tamarind hulls are crushed, powdered and modified using 0.5 N sulfuric acid and formaldehyde. The experiments were performed to assess sorption capacity of the sorbent. The influences of variable parameters viz., particle sizes and doses of the sorbent material, agitation time and the pH are studied for Cu(II)-MTHP system. The optimum conditions form the maximum removal of Cu(II) ions by modified tamarind hull powder is established, from the experimental results and is presented in this paper.Item SORPTION ABILITY OF MODIFIED FRUIT NUT SHELLS IN THE REMOVAL OF CO(II) IONS FROM AQUEOUS SOLUTIONS(Universal Journal of Environmental Research and Technology (Euresian Publications), 2013) Muthulakshmi Andal N; Charulatha SThe present work deals with the efficiency of modified Terminalia catappa seed shell (TCSS), an agricultural waste, for the removal of Co(II) from aqueous solutions. Three methods of modifications of the sorbent material have been done and the experiments were carried out by employing batch equilibration method. The influences of variable parameters viz., particle sizes and adsorbent dosages of the sorbent material, agitation time, initial concentrations of the sorbate solutions, pH, cations, anions, co-ions and temperatures have been studied. The surface characteristic study of the modified TCSS has been supported by FT-IR, SEM and EDAX techniques. The linearity of the isothermal plots suggests that the Co(II) – TCCS system obeys Langmuir and Freundlich adsorption models.Item SORPTION CHARACTERISTICS OF MODIFIED FRUIT SHELL ONTO ZN(II) IONS IN AQUEOUS MEDIA(Advances in Applied Research, 2018) Charulatha S; Muthulakshmi Andal NThe present work was carried out to study the efficiency of acid treated fruit shell of Aeglemarmelos (L.) Correa (TAMC), for theadsorption of Zn(II) from aqueous solutions. TAMC was characterized using Fourier Transform Infrared (FTIR), ScanningElectron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDAX) analyses for the presence of functional groups, surfacemorphological changes in the chosen material and occurrence of absorption peak in the metal laden TAMC, respectively. Batchequilibration mode of experiments were carried out to assess the impact of the variable parameters viz., particle sizes and doses ofthe adsorbent material, predetermined time intervals between the sorbent and the sorbate species and pH of the medium. Theoptimized conditions for the maximum removal of Zn2+ ions (91.1%) from1000 mg L-1 initial concentration were 0.18 mm particlesize, 1000 mg adsorbent dose, 10 min agitation time and pH 5.5. The applicability of Langmuir and Freundlich isotherms at variousinitial concentrations were plotted for Zn(II)-TAMC system wherein the best straight line was well suited for Langmuir modelwhich indicated the monolayer adsorption. The maximum sorption capacity of TAMC was 80.45 mg g-1 as calculated from theequilibrium concentration data, which was observed to be substantially greater than the q (adsorption capacity at equilibrium) evalues reported employing different sorbent materials. The results revealed the fruit shell of Aeglemarmelos (L.) Correa as apromising material with excellent metal removal capacity when compared to other sorbent materials (Keywords: Zinc ions, fruitshell, characterization, adsorption, parameters).