Qualification: 
Ph.D, PG
d_gangadharan@cb.amrita.edu

Dr. D. Gangadharan did his Post Graduation in Chemistry at P. S. G. College of Arts and Science, under Bharathiar University, India. He completed his Doctoral dissertation in Chemistry from Central Salt & Marine Chemicals Research Institute (CSIR), under Bhavnagar University, India.

His doctoral studies were focused on the Synthesis of Biocidal Polymers. During his study he developed Biocidal Polymers based on Biocidal Functional Groups, Halogen releasing Functional Polymers and Polymers containing Nano and Micro Particles of Silver and Copper for the Disinfection of Water. His research work was supported by Senior Research Fellowship from CSIR, India.

During his research period in CSMCRI, he was also involved in developing speciality polymers for the removal of arsenic from the ground water and development of a field test kit for arsenic. This research work was supported by Ministry of Environment and Forest (MoEF).

Affiliation(s)

  • Assistant Professor, Department of Sciences (since 10th July 2013)

Education

  • 2012: Ph.D,
    Central Salt & Marine Chemicals Research Institute (CSIR) affiliated to Bhavnagar University, Gujarat, India.
    Thesis Title:Synthesis of Biocidal Polymers for Disinfecting Drinking Water
    Thesis Supervisor: Dr. P. S. Anand
  • 2004 - 2006: M. Sc. Chemistry,
    P.S.G.College of Arts &Science, Bharathiar University, Coimbatore, Tamil Nadu, India.
  • 2001 - 2004: B.Sc.Chemistry,
    Kongunadu Arts & Science College, Bharathiar University, Coimbatore, Tamil Nadu, India.

Awards, Certificates, Honors and Societies

  • Senior Research Fellowship (CSIR) at Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat during 2009-2012. CSIR Letter no. 31/28(113)/2009-EMR-I
  • Seventh Rank in B.Sc.Chemistry, Bharathiar University, Coimbatore, Tamil Nadu, India.
  • First Rank in M.Sc.Chemistry, P.S.G.College of Arts & Science, Coimbatore, Tamil Nadu, India.

Research Interest

  • Area of Interest
    • Water treatment
    • Functional polymers
    • Reutilization of waste
    • Project guided
  • UG Project
    • Debasmita Ojha P, (2016) Synthesis of zinc cobalt mixed metal oxide
    • Harikesh R, (2017) Synthesis of copper oxide from e-waste
  • PG Project Guided
    • Arun Viswan K.K, (2018) Polymeric microspheres modified with Rhodamine B for removal of copper ion from e-waste solution.
    • Sanjay (2019) Evaluating the impact of dye removal from water using ceramic filter system.
    • Nirmal sree(2019) Synthesis of MnO2 loaded copolymer beads for removal of methylene blue from wastewater.
    • Sneha Sudhakaran (2020) Polymeric microspheres containing aluminium ion for the removal of fluoride ion from the water
    • Philip Vincent (2020) Polymeric microspheres modified with ferric hydroxide for the removal of arsenic

Teaching

UG Theory:

S.No Course code Course Title
1. 18CHY101 General Chemistry I
2. 18CHY111 General Chemistry II
3. 18CHY315 Basic Spectroscopic Techniques
4. 18CHY353 Forensic Science
5. 18CHY336 Polymer chemistry
6. 18CHY114 Chemistry II

PG/Ph.D Theory

S.No Course code Course Title
1. 18CHY603 Solid State Chemistry and Materials Science
2. SS827 Wastewater treatment technologies and bioremediation

UG Labs

  1. 18CHY184 Inorganic Quantitative Lab. – Volumetric Analysis
  2. 18CHY281 Inorganic Qualitative Lab
  3. 18CHY385 Inorganic Quantitative Lab. – Gravimetric Analysis
  4. 18CHY181 Engineering Chemistry Lab A
  5. 18CHY182 Engineering Chemistry Lab B

PG Labs

  1. 18CHY581 Inorganic Semi-micro Qualitative Analysis Lab

Publications

Publication Type: Book Chapter

Year of Publication Title

2021

Dr. Gangadharan D. and Rajagopalan, T., “Organic pollutants in water and its remediation”, in Water Pollution and Remediation: Organic Pollutants, Springer International Publishing, 2021.

2019

T. Selvamani, Dr. Gangadharan D., and Anandan, S., “Synthetic Strategies of Nanobioconjugates for Bioelectrochemical Applications”, in Bioelectrochemical Interface Engineering, John Wiley & Sons, Ltd, 2019, pp. 411-430.[Abstract]


Summary Nanobioconjugates are hybrid components that deal with the intellectual properties of nanomaterials and biomolecules. However, these interesting properties strongly depend on the surface chemistry of nanoparticles, which changes the physical dimensions of the particulate in the biological system. Such changes have emerged as researchers explore nanobioconjugates for their potential applications in biology and medicine. In particular, noble metal nanoparticles, quantum dots, silica nanoparticles, metal oxides, and carbon nanomaterials are gaining much interest owing to their unique properties, which lead to undergoing conjugation with biomolecules like enzymes, proteins, antibodies, and genetic materials to develop the nano–bio interface. Such hybrid interfaces of nanomaterials with biomolecules are either by physical adsorption or by covalent linkage toward tunable biological functions, which are used for biosensing, biochips, bioimaging, and biomedical applications. This chapter mainly covers the methods developed for the fabrication of nanobioconjugated systems and the unique studies on bioelectrochemical applications.

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2011

P. Kiritkumar Mangaldas, Dr. Gangadharan D., and Anand, P. Singh, “Arsenic poisoning and Remedies”, in Environmental Security: Human and Animal Health Ed., Sudhi Ranjan Garg., 1st ed., International Book Distributing, 2011.

Publication Type: Journal Article

Year of Publication Title

2020

R. R. Lakshan, Rosini, A. M., Sathiyan, K., Dhanya Sathyan, Dr. Mini K. M., and Dr. Gangadharan D., “Comparison of different dosages of PCM incorporated wallpanels”, IOP Conference Series: Materials Science and Engineering, vol. 872, p. 012119, 2020.[Abstract]


In the modern world of development and technology, sustainable development is of greater need. One of the main factors that cause global warming is due to the usage of the artificial air conditioner in buildings. This study is the development of an eco-friendly wall panel for buildings which can reduce the usage of artificial air conditioner and to improve the thermal comfort in buildings in a sustainable way. To achieve this, PCM materials is used in mortar wall panels to regulate the temperature. PCM absorbs heat at higher temperature and releases the absorbed heat at lower temperature. In this study PCM were encapsulated to prevent them from being affected by the chemical environment. The encapsulated PCM were incorporated in mortar cubes and were made into wall panels. The PCM incorporated specimens were tested for compressive strength and thermal conductivity to study the hardened property and the heat transfer. The obtained results were compared with the control specimen to conclude the effect of PCM in mortar wall panels. The PCM incorporated specimens showed improved results compared to the control specimen.

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2018

K. K. Arun Viswan and Dr. Gangadharan D., “Valorisation of rhodamine B adsorbed copolymer beads for the recovery of Cu2+ from e-waste: Green approach”, Journal of Environmental Chemical Engineering, vol. 6, pp. 7002-7009, 2018.[Abstract]


The methacrylic acid-divinylbenzene copolymer beads were prepared by suspension polymerization and used for the removal of rhodamine B (RhB) dye. Batch experiments were carried out to find the adsorption parameters. Langmuir adsorption isotherm model was found to be the best suited for the adsorption of RhB on the copolymer beads. The RhB adsorbed copolymer beads were valorised as adsorbent for the removal of Cu2+ from e-waste solution, which was compared with electrolytic solution. The Cu2+ loaded on the RhB containing copolymer beads was recovered by using 1 M HNO3. The RhB loaded on the copolymer beads were successfully eluted by using a mixture of acetone and acetic acid. Selectivity of RhB dye for the recovery of Cu2+ ions from e-waste was also carried out in this work. Methods were developed to recover both the Cu2+ and RhB dye separately. Microscopic analysis was performed to understand the adsorption of RhB and ion-exchange of Cu2+ onto the copolymer beads. © 2018 Elsevier Ltd.

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2018

D. Dixit, Dr. Gangadharan D., Popat, K. M., Reddy, C. R. K., Trivedi, M., and Gadhavi, D. K., “Synthesis, characterization and application of green seaweed mediated silver nanoparticles (AgNPs) as antibacterial agents for water disinfection.”, Water Sci Technol, vol. 78, no. 1, pp. 235-246, 2018.[Abstract]


A simple and eco-friendly method for the synthesis of hybrid bead silver nanoparticles (AgNPs) employing the aqueous extract derived from natural and renewable source namely tropical benthic green seaweed Ulva flexuosa was developed. This route involves the reduction of Ag ions anchored onto macro porous methacrylic acid copolymer beads to AgNPs for employing them as antibacterial agents for in vitro water disinfection. The seaweed extract itself acts as a reducing and stabilizing agent and requires no additional surfactant or capping agent for forming the AgNPs. The nanoparticles were analyzed using high-resolution transmission electron microscopy, UV-Vis spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis and inductively coupled plasma optical emission spectroscopy. The study elucidates that such biologically synthesized AgNPs exhibit potential antibacterial activity against two Gram positive (Bacillus subtilis, Staphylococcus aureus) and two Gram-negative (Escherichia coli, Pseudomonas aeruginosa) bacterial strains tested. The bacterial count in treated water was reduced to zero for all the strains. Atomic force microscopy was performed to confirm the pre- and post-state of the bacteria with reference to their treatment with AgNPs. Attributes like facile environment-friendly procedure, stability and high antibacterial potency propel the consideration of these AgNPs as promising antibacterial entities.

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2015

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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2013

Dr. Gangadharan D., Anand, P. Singh, Popat, K. Mangaldas, and Dixit, D., “Amidoxime copolymer beads containing Cu/Cu2O microparticles as a biocidal material for water disinfection”, Journal of Applied Polymer Science, vol. 127, pp. 3491–3499, 2013.[Abstract]


Macroporous crosslinked acrylonitrile-divinylbenzene copolymer beads were synthesized by suspension polymerization technique. The beads were chemically modified to have amidoxime functional group, which was used as a solid support for anchoring copper microparticles. The copper ions loaded on the copolymer beads were reduced using strong reducing agent to have copper microparticles on the amidoxime copolymer beads. The size of copper particles formed depends upon the amount of copper ions loaded on the beads. The formation of copper microparticles on the copolymer was confirmed by instrumental analysis. The copper containing amidoxime copolymer beads were investigated for the biocidal activity. The size and the distribution of copper particles on the amidoxime copolymer beads influenced their biocidal activity. The biocidal activity was tested against two Gram-positive bacteria, Bacillus subtilis and Staphylococcus aureus, and against two Gram-negative bacteria, Pseudomonas aeruginosa and Escherichia coli. The beads containing copper particles showed better biocidal activity against the Gram-negative bacteria when compared with the Gram-positive organisms.

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2012

Dr. Gangadharan D., Dhandhala, N., Dixit, D., Thakur, R. Singh, Popat, K. Mangaldas, and Anand, P. S., “Investigation of solid supported dendrimers for water disinfection”, Journal of Applied Polymer Science, vol. 124, pp. 1384–1391, 2012.[Abstract]


Polystyrene copolymer beads supported dendrimer was synthesized and investigated for its biological applications. Macroporous cross-linked polystyrene copolymer beads were synthesized using suspension polymerization. Two successive generations of di(chloroethyl) amine-type end group functionality was formed on the polystyrene copolymer beads. Elemental analysis, Fourier transform infrared spectra, and solid state 13C NMR spectra were employed to characterize the polymer bound dendrimer. The polymer bound dendrimer was tested for antibacterial action against both Gram-positive and Gram-negative bacteria. The activity against both types of organism increased with an increase in the nitrogen atoms in the polymer back bone. The dendritic structure containing both amino and di(chloroethyl) groups showed significant reduction in the bacterial count when kept in 20 mL autoclaved water with bacterial cultures having an initial count in the range of 12–83 × 106 CFU/mL. More »»

2010

Dr. Gangadharan D., Harshvardan, K., Gnanasekar, G., Dixit, D., Popat, K. Mangaldas, and Anand, P. Singh, “Polymeric microspheres containing silver nanoparticles as a bactericidal agent for water disinfection”, Water Research, vol. 44, pp. 5481–5487, 2010.[Abstract]


A facile methodology has been developed by anchoring silver nanoparticles on to the macroporous methacrylic acid copolymer beads for disinfection of water in this study. Methacrylic acid copolymer beads are prepared by suspension polymerization technique. Silver nanoparticles formed on these copolymer beads by chemical reduction method are stable and are not washed away by water washing. Their stability is due to the interaction of nanoparticles with the carboxylic functional group on the copolymer beads. Copolymer beads containing silver nanoparticles are tested for their antibacterial activity against two gram positive and two gram negative bacteria. Antibacterial activity tested shows that they can be a potent biocidal material for water disinfection as they are highly effective against both gram positive and gram negative bacteria tested. The silver nanoparticles bound copolymer beads performed efficiently in bringing down the bacterial count to zero for all the strains tested except spore forming Bacillus subtilis which showed 99.9% reduction. There is no bacterial adsorption/adhesion on the copolymer beads containing silver nanoparticles proving them as effective water disinfectant.

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2008

H. B. Halvadiya, Dr. Gangadharan D., Popat, K. Mangaldas, and Anand, P. Singh, “Deionization of coagulated, clarified, turbid Gauri Shankar Lake waters by using ion-exchange technology”, Separation Science and Technology, vol. 43, pp. 2183–2195, 2008.[Abstract]


Water collected from a rain fed Gauri Shankar Lake, Bhavnagar, Gujarat, India was used for this study. It was clarified by giving treatment with alum and poly aluminum chloride (PAC) to remove suspended impurities present in it. Waters having turbidity value of 100–750 NTU (Nephelometric Turbidity Units) were treated with PAC and alum. The dosage of PAC required for the treatment was 60% less as compared with alum. The clarified water was passed through columns loaded with strong acid and strong base ion-exchange resins to obtain deionized water. The experiments were carried out for 100 cycles of exhaustion and regeneration. The effect of the coagulation process conditions on ion-exchange capacity, and the physical attrition of the ion-exchange resins were studied intensively. Also, the performance of ion-exchange resins was compared with virgin ground waters from the institute's well. The resins employed in the study were subjected to EDX (Energy Dispersive X-Ray Spectroscopy) analysis to find out the presence of coagulating ions adsorbed on the resins. The resins were also subjected to SEM (Scanning Electron Microscope) analysis to find changes on their surface due to adhering materials if any.

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Publication Type: Thesis

Year of Publication Title

2011

Dr. Gangadharan D., “Synthesis of Biocidal Polymers for Disinfecting Drinking Water”, 2011.[Abstract]


The amidoxime functional copolymer beads form a stable solid support for the formation of Cu/Cu2O particles. The interaction of copper particles on the copolymer bead with the water shows a change in colour from reddish brown to green due to the hydration of cuprous oxide formed on the surface of the bead.

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Publication Type: Patent

Year of Publication Title

2010

A. Pritpal Singh, Mangaldas, P. Kiritkumar, Gohil, Asinh, and Dr. Gangadharan D., “Preparation of polymeric compositions for arsenic removal from ground waters”, 2010.[Abstract]


A process is described for the preparation of macro porous copolymer of methacrylic acid cross linked with divinyl benzene and the like in the presence of toluene as porosogenic agent. This copolymer was aminated with aliphatic diamines to have ploy amide/imide type functional groups on its surface, and this aminated copolymer was treated with ferric chloride solution to load ferric ions followed by caustic alkali solution treatment. This resin is made free from adhering or unabsorbed ions and then used for the removal of arsenic from drinking water. (Application No. 319/DEL/2010)

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2009

G. Pushpito Kumar, Chandrika, S., Mishra, P., Gandhi, M. Ramniklal, Dr. Gangadharan D., Upadhyay, S. Chandra, Paul, P., Anand, P. Singh, Popat, K. Mangaldas, Shrivastav, A. Vijaykumar, Mishra, S. Kumar, Ondhiya, N., Maru, R. Dudabhai, Brahmbhatt, H., Boricha, V., Chaudhary, D. Ram, Rebary, B., and Zala, K. Sukhdevsin, “Integrated Process For The Production of Jatropha Methyl Ester and By Products”, 2009.[Abstract]


The present invention provides a simpler and more energy efficient process for the preparation of fatty acid methyl ester (biodiesel) from sun dried whole seed capsules of Jatropha curcas integrated with value addition of seed shells, deoiled cake and crude glycerol co-product stream. More specifically, the invention relates to a method of dispensing with the need for excess methanol recovery through distillation, cost-effective resin treatment for the refining of methyl ester and utilization of co-streams for preparation of high density energy briquettes and Polyhydroxyalkanoate biodegradable polymer in efficient and cost-effective manner. (Application Number: EP20100719642)

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Publication Type: Conference Paper

Year of Publication Title

2008

Dr. Gangadharan D., .Gnanasekaran, G., .K.M.Popat, D., and .P.S.Anand, D., “Synthesis of nano scale metal cluster on surface functionalized polymeric microspheres and their antibacterial studies”, in International conference on “Functional Materials, IITM, Chennai , 2008.

2007

Dr. Gangadharan D., Popat, K. M., and Anand, P. S., “Comparative study of activated alumina and specific ion exchange resin as defluoridating medium for groundwater”, in 6th IWMI-Tata Annual Partners’ meet, 2007.

Participated Programme

  1. Participated in two-day MHRD sponsored workshop on National Mission on Education through information and communication technology (NME-ICT) during 11 & 12 February, 2013 at National Institute of Technology, Triuchirappalli-620015.
  2. Attended training program on Technology Led Entrepreneurship Development programme of HRDG, CSIR at IICT Hyderabad during 4-18 July 2011.
  3. Participated in the “NANOSYS 2011” held KrantiguruShyamaji Krishna Verma Kachchh University, during February 26, 2011.

 Journal Reviewer

  • Reviewer to Journal of Applied Polymer Science published by Wiley-Interscience
  • Reviewer to Science of total environment published by Elsevier
Faculty Research Interest: