Ph.D, MPhil, MSc

Dr. Asha Sathish currently serves as Assistant Professor in Chemistry, Department of Sciences, School of Engineering, Coimbatore Campus.


Publication Type: Journal Article

Year of Publication Title


Nithya K., Dr. Asha Sathish, P. Kumar, S., and Dr. Ramachandran T., “Fast kinetics and high adsorption capacity of green extract capped superparamagnetic iron oxide nanoparticles for the adsorption of Ni(II) ions”, Journal of Industrial and Engineering Chemistry (IF – 4.4), 2017.[Abstract]

Superparamagnetic iron oxide nanoparticles were synthesized using co-precipitation technique by dissolving required stoichiometric proportions (1:2) of Fe2+ and Fe3+ salts in water. Lantana camara extract and ammonia solution were used as the stabilizing and precipitating agents, respectively. The prepared particles were characterized using FTIR, TGA, PSA, SEM–EDAX and zeta potential analysis. This material was successfully adopted for the removal of Ni(II) ions from aqueous solution and the process parameters were optimized. The results indicated the faster kinetics and a remarkably higher adsorption capacity of 227.20mg/g at a pH of 6.0 and an adsorbent dose of 0.05g.

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Nithya K., Dr. Asha Sathish, Kumar, PcSenthil, and Dr. Ramachandran T., “Biosorption of hexavalent chromium from aqueous solution using raw and acid-treated biosorbent prepared from Lantana camara fruit”, Desalination and Water Treatment, vol. 57, no. 27, pp. 25097-25113, 2016.[Abstract]

The aim of the present investigation was to explore the performance of the acid-treated Lantana camara fruit biosorbent in binding hexavalent chromium from aqueous solutions. FTIR studies revealed the contribution of carbohydrates, glycosides, and flavonoids in the biosorbent. EDS analysis exhibited the occurrence of chromium ions after biosorption, whereas SEM image exposed the enhancement of porosity after acid treatment. The isotherm models such as Langmuir, Freundlich, Dubinin–Radushkevich, and Temkin models were studied to depict the mechanism of interaction of the biosorbent with the adsorbate. Besides isotherm models, kinetic studies like pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were also performed to validate the controlling mechanism of biosorption. Langmuir model showed a better fit favoring monolayer adsorption and a high correlation value from the pseudo-second-order model suggests chemisorption. To understand whether the biosorption process releases or absorbs energy, thermodynamic analysis was carried out. The outcome of the findings showed endothermic nature of the process with increased randomness at the solid solution interface. Regeneration studies showed better results with 0.2 M NaOH solutions. The obtained maximum uptake capacity of 83 mg/g with a minimal biomass dosage proves the credible potential of the selected biosorbent in removing toxic hexavalent chromium. © 2016 Balaban Desalination Publications. All rights reserved.

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N. Durgadevi, Sunitha, M., Dr. Asha Sathish, Guhan, S., and Dr. Ramachandran T., “Electro Oxidation of Methanol on Ni/Ni-Co Coated SS Mesh Electrode”, Indian Journal of Science and Technology, vol. 9, 2016.[Abstract]

In this work, the oxidation of methanol was carried out using Ni and Ni-Co alloy electrodeposited on stainless steel mesh substrate with a view to replace expensive and sensitive platinum and platinum alloy catalysts. The performance of electrode was assessed through cyclic voltammetry in alkaline media. The operating conditions of the electrode were optimized.

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Nithya K., Dr. Asha Sathish, Dr. Gangadharan D., Vinaykumar, A., Tharakan, D. M., and Sruthi, B., “Batch, kinetic and equilibrium studies of hexavalent chromium from aqueous phase using Galaxaura Ornate Seaweed”, International Journal of ChemTech Research, vol. 8, no. 4, pp. 1947-1956, 2015.[Abstract]

Batch studies have been carried out to study the feasibility of adsorption of hexavalent chromium onto Galaxaura ornate seaweed. The equilibrium data and biosorption capacity of chromium was determined by varying the pH, dosage of adsorbent, contact time and initial metal ion concentration. The maximum adsorptive capacity was obtained at a pH of 2 at an equilibrium time of 120 minutes. Highest removal efficiency for raw biomass was found to be 71% for hexavalent chromium under optimal conditions. The biosorption isotherms were determined using Langmuir and Freundlich models. Based on the correlation coefficient value it was found that the data fits well both to Langmuir (R2=0.99) and Freundlich adsorption isotherm (R2=0.98) representing monolayer adsorption as well as adsorption on heterogeneous surfaces. The findings of the kinetic study infer that pseudo second order model show a better fit for a wider range of concentrations studied than the pseudo first order kinetics. The results indicate that the identified seaweed has the potential to adsorb chromium (VI) from the aqueous solution. © 2015 Sphinx Knowledge House. All rights reserved.

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M. S. Nair, Dr. Asha Sathish, and Pillai, M. S., “Studies on the stabilities of some mixed ligand complexes of nickel (II) involving dopamine/dopa and sulphur containing ligands”, Indian Journal of Chemistry, 1999.[Abstract]

Stability constants for the mixed ligand species of the types NiAB, NiABH and NiABH(2) (where A=dopamine and dopa; B=L-cysteine, D-penicilamine and L-cysteic acid) have been determined. In the NiAB, the mode of coordination of A and B is exactly similar to their binding in the respective binary complexes. In NiABH, the extra proton is attached to A. In NiABH(2) (where A=dopamine) one proton is attached to A and other resides with B, while in the NiABH(2) (where A=dopa) both the protons are with dopa. More »»


  1. Fifth NIAS- DST workshop on "Nano Technology: ”Dimensions of Nano Science, Nano Technology & Society for Women Scientists & Technologists", National Institute of Advanced Studies, Bangalore, Dec 14 - 18, 2009
  2. Two Days workshop on "Nanotechnology : Innovations for Tomorrow’s World Environment", Sponsored by the Department of Science and Technology, GOI & Tamil Nadu State Council for Science and Technology, GOT., Organised by Periyar Maniammai University, August 6 - 7, 2008.
  3. Two days workshop on "Theory and hands on experience on 3 Dimensional Structure Determinations of Drugs using X-Ray Crystallography",Department of Chemistry, Gandhigram Rural University, Gandhigram, March 14 - 15, 2008.
  4. National workshop on Nano Science and Nano Technology, Amrita School of Engineering, Amritapuri Campus, May 14 - 18, 2007.
  5. Two day National Workshop on "An Introduction to Computational Chemistry and Molecular Modeeling", Department of Polymer and CEN, Amrita School of Engineering, Ettimadai, Coimbatore, July 28 - 29, 2006.


Invited Talks

  1. "Fuel Cells - Part of a Sustainable Energy Future", in the Fifth NIAS- DST Workshop on Nano Technology : 'Dimensions of Nanoscience, Nanotechnology & Society for Women Scientists & Technologists' and at the National Institute of Advanced Studies, Bangalore.

Projects Undertaken

  1. Undertaken an Internal Project on "Developing Nano Electrodes and Membrane for Direct Methanol and Ethanol Fuel Cells – Preliminary Studies", Completed within 18 Months, Amounted to Rs. 80, 000.
Faculty Research Interest: