Ph.D, PG

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).


Publication Type: Journal Article

Year of Publication Title


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.

More »»


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.

More »»


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 »»


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.

More »»


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.

More »»

Publication Type: Thesis

Year of Publication Title


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.

More »»

Publication Type: Book Chapter

Year of Publication Title


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: Patent

Year of Publication Title


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)

More »»


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)

More »»


  • 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.
  • Attended training program on Technology Led Entrepreneurship Development Programme of HRDG, CSIR at IICT Hyderabad during 4-18 July 2011.
  • Participated in the “NANOSYS 2011” held Krantiguru Shyamaji Krishna Verma Kachchh University, during February 26, 2011.

SEE ALSO: www.sites.google.com/site/dayalgangadharan

Faculty Research Interest: