Qualification: 
M.E
Email: 
k_nithya@cb.amrita.edu

Nithya. K serves as an Assistant Professor at the Department of Chemical Engineering and Material Sciences at Amrita School Engineering, Coimbatore. She obtained her Bachelor’s degree in Chemical Engineering from Madurai Kamaraj University and Master’s degree in Environment Management from Anna University, CEG campus. She is nearing her completion of Ph. D. at Amrita Vishwa Vidyapeetham in Nanobiosorption for Heavy metal Removal from Electroplating Effluents. She has 10 years of experience in teaching Chemical Engineering. She also plays the role of the academic coordinator in the department. She is the Co- Developer of the course Sustainability and Green chemistry under National Mission Project on Education through ICT, Pedagogy Project for developing suitable pedagogical methods for various classes’ intellectual calibers and research in e-learning.

Publications

Publication Type: Journal Article

Year of Conference Publication Type Title

2017

Journal Article

Nithya K., Sathish, A., Kumar, P. S., and Ramachandran, T., “An insight into the prediction of biosorption mechanism, and isotherm, kinetic and thermodynamic studies for Ni(II) ions removal from aqueous solution using acid treated biosorbent: The Lantana camara fruit”, Desalination and Water Treatment, vol. 80, pp. 276-287, 2017.[Abstract]


The study focuses on exploring the binding mechanisms of Ni(II) ions and determining the maximum uptake capacity of the biosorbent. The fresh biosorbent was subjected to sulfuric acid treatment to enhance the porosity and to introduce the specific sulfonic groups onto the surfaces of the biosorbent. Characterization techniques like scanning electron microscope, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and elemental analysis were utilized to understand the biosorption mechanisms. The results exhibit the likelihood of both physical and chemical interactions of the biosorbent with the Ni(II) ions. Out of the isotherm models investigated, Langmuir model presented a better fit to the experimental data favoring monolayer adsorption. In addition, intra-particle diffusion model revealed the possibility of both pore and film diffusion. Compared with pseudo–first-order model, pseudo-second-order kinetic model obtained a better fit. The outcome of the thermodynamic studies showed the exothermic nature of the biosorption process with a negative enthalpy value (ΔH°). Additionally, it is also significant to note that the adsorption of Ni(II) ions was favored only at lower temperatures. A maximum removal efficiency of 97% was observed for 25 mg/L Ni(II) solution. Moreover, the results of the desorption studies using 0.3 N HCl were also encouraging, with a removal efficiency of almost 91%. © 2017 Desalination Publications. All rights reserved.

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2017

Journal Article

Nithya K., Sathish, A., P. Kumar, S., and Ramachandran, T., “Functional group-assisted green synthesised superparamagnetic nanoparticles for the rapid removal of hexavalent chromium from aqueous solution”, IET Nanobiotechnology, vol. 11, no. 7, pp. 852-860, 2017.[Abstract]


Superparamagnetic nanoparticles (NPs) prepared using the capping agent derived from the Lantana camara fruit extract were used to study the adsorption of chromium ions. Characterisation techniques such as scanning electron microscope, energy-dispersive X-ray, Fourier transform infrared spectroscopy, X-ray diffraction, vibrating sample magnetometer and thermo gravimetric analysis (TGA) were used to study the NP features and adsorption mechanisms. The maximum monolayer adsorption capacity calculated from the Langmuir isotherm was found to be 41 mg/g. The chemical nature of the adsorption is confirmed with the results of Dubinin-Radushkevich model and thermodynamic studies. In addition, thermodynamically favourable and spontaneous adsorption is considered to be a good indication for the removal of metal ions. Out of the kinetic models investigated, the experiments exhibited the best fit to pseudo-second-order model, advocating for surface-based adsorption, involving both physical and chemical interactions. It is also significant to note that 85% of the adsorption occurs in the first 10 min, and hence the selected adsorbent is also claimed for rapid removal of metal ions. The newly synthesised adsorbent hence possesses remarkable properties in terms of simple synthesising technique, low cost, rapid uptake and improved efficiency without generating harmful byproducts. © The Institution of Engineering and Technology 2017.

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2017

Journal Article

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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2016

Journal Article

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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2015

Journal Article

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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2015

Journal Article

Nithya K., Sathish, A., and Ramachandran, T., “Batch, kinetic and equilibrium studies of biosorption of chromium (VI) From aqueous phase using activated carbon derived from Lantana camara fruit”, Oriental Journal of Chemistry, vol. 31, no. 4, pp. 2319-2326, 2015.[Abstract]


Batch experiments have been conducted to determine the maximum adsorption capacity of activated carbon derived from Lantana camara fruit to remove hexavalent chromium from aqueous solution. The removal efficiency and uptake capacity of the biosorbent were determined by varying several batch level parameters. Highest removal efficiency of the biosorbent was found to be almost 99% under optimal conditions. Maximum monolayer adsorption capacity was determined to be 86 mg/g. The experimental data best fitted with Langmuir adsorption isotherm and pseudo second order model. These findings conclude that the selected biosorbent has more promising features in binding hexavalent chromium in aqueous media.

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Publication Type: Conference Proceedings

Year of Conference Publication Type Title

2017

Conference Proceedings

Nithya K., Sathish, A., and Sanganathan, A., “Plant extract capped magnetite nanoparticles for the rapid removal of Ni (II) ions from aqueous solution”, 2nd International Conference on Recent Advancements in Chemical, environmental and Energy Engineering ( RACEEE 2017). SSN College of Engineering, Chennai, Tamilnadu, p. 35, 2017.

2014

Conference Proceedings

Nithya K., .Ramachandran, T., and .Asha, S., “A review on biosorption of hexavalent chromium”, Proceedings, National Conference on Recent Advances in Water and Wastewater Treatment ( RAWWT 2014), . The Gandhigram Rural Institute, Deemed University, Dindigul ,Tamil Nadu, p. 63, 2014.

2013

Conference Proceedings

Nithya K. and Nagendran, R., “Sustainable Tourism Plan for Mudumalai Wildlife Sanctuary”, Proceedings of National Conference on Nilgiri Biosphere Reserve Silver Jubilee Celebration ( NBRSJC). Department of Zoology & Wildlife Biology, Government Arts College, Udhagamandalam, Tamilnadu, p. 119, 2013.

2010

Conference Proceedings

Dr. Geetha Srikanth, Nithya K., and , “Antibacterial Potential of Aquous Extract of Coleus Ambonicus Against Selected Pathogens”, Proceedings of 2nd National Conference on Current Scenario in Microbial Biotechnology (CSMB-2010). Department of Biotechnology, K. S. Rangasamy College of Technology, Tiruchengode, Tamilnadu, pp. 112-117, 2010.

2008

Conference Proceedings

S. Ramachandran, Ramachandran, T., Dr. Satheesh Babu T. G., and Nithya K., “Comparative Study of Removal of Fluoride from Ground Water by Bio-sorption using Fresh Water Algae based BioMass and Surface Modified Activated Carbon”, Proceedings of International Conference CHEMCON 2008, Green Technology and Sustainable Development, 61st Annual Session of IIChE . Panjab University, Chandigarh, p. 137, 2008.

Courses and Labs Handled

Inorganic Chemical Technology Environmental Studies Mass Transfer lab
Chemical Technology Introductory Modern Biology Chemical Technology lab
Material Science Environment Engg. For Process Industries Inorganic & Physical Chemistry lab
Mechanical Operations Work Environment & Safety Engineering Drawing
Engineering Management Mechanical Operations lab Engineering Graphics
Environmental Science & Engineering Chemical Reaction Engineering lab Fluid Mechanics lab
207
PROGRAMS
OFFERED
5
AMRITA
CAMPUSES
15
CONSTITUENT
SCHOOLS
A
GRADE BY
NAAC, MHRD
9th
RANK(INDIA):
NIRF 2017
150+
INTERNATIONAL
PARTNERS