Center for the Environment

Special Seminar: Affordable drinking water purification using nanotechnology

May 31 @ 4:00 PM - 6:00 PM - 2001 Jischke Hall

SPECIAL SEMINAR

Affordable drinking water purification using nanotechnology

 

T. Pradeep

Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036 India.

E-mail: pradeep@iitm.ac.in

 

4 pm Tuesday, May 31 2011

2001 Jischke Hall

 

Abstract

Realizing the molecular nature of contaminants in drinking water and the need to remove them at ultra trace levels, significant progress has been made in the recent past to utilize nanomaterials for water purification. My presentation summarizes our recent efforts in understanding the chemistry of nanoscale materials for the purification of drinking water. The application of noble metal nanoparticle-based chemistry for drinking water purification can be summarized for three major types of contaminants: halogenated organics including pesticides, heavy metals and microorganisms. We were the first to introduce a nanomaterials-based purifier for drinking water to tackle pesticide contamination.  Recent efforts for the removal, as well as ultralow concentration detection of such species, using a variety of nanostructures will be summarized. There are several materials emerging in the recent past and their chemistry may also be utilized for this application. We have now developed an all-inclusive affordable water purifier addressing all the common contaminants. Some of these purifiers are undergoing field trials now and will be introduced in the market very soon. The domestic drinking water purifier segment is a $530 million industry in India and is growing at a rate of 24% annually. This growth is largely around urban India. There is a need to take water purifiers to rural India where water quality is fast deteriorating. The challenge is to take affordable technology to the poor.  Lessons learnt in the commercialization of technologies of this kind will be outlined.

Pradeep is Professor of Chemistry at IIT Madras. His work is in the area of molecular materials and surfaces with emphasis on nanoparticles and ice surfaces. He showed that the equilibrium constant of the prototypical proton transfer reaction, NH3 + HCl →NH4Cl, is orders of magnitude lower on ice. Recent honors include the Shanti Swaroop Bhatnagar Prize in chemical sciences, 2008; elected as fellow of the Indian Academy of Sciences, 2009; Kerala Sahitya Academy Award, 2010

 

Seminar is part of a Workshop “Expanding the D in University R & D” on May 31st, 10.30am in Jischke rm 2001

Workshop information and schedule from Brandy Shumaker, dunlap@purdue.edu

Affordable drinking water purification using nanotechnology    T. Pradeep

Some recent references:

A practical silver nanoparticle-based adsorbent for the removal of Hg2+ from water, E. Sumesh, M. S. Bootharaju, S. Anshup and T. Pradeep, J. Hazard. Mat., 189 (2011) 450-457.

Reduced graphene oxide-metal/metal oxide composites: Facile synthesis and application in water purification, T. S. Sreeprasad, S. M. Maliyekkal, K. P. Lisha and T. Pradeep, J. Hazard. Mat., 186 (2011) 921-931.

Luminescent quantum clusters of gold in bulk by BSA-induced core etching of nanoparticles: Metal ion sensing, metal enhanced luminescence and biolabeling, M. A. H. Muhammed, P. K. Verma, S. K. Pal, A. Retnakumari, M. Koyakutty, S. Nair, and T. Pradeep, Chem. Eur. J., 16 (2010) 10103–10112.

A novel cellulose-manganese oxide hybrid material by in-situ soft chemical synthesis and its application for the removal of Pb(II) from water, Shihabudheen M.Maliyekkal, Kinattukara P.Lisha and T. Pradeep, J. Hazard. Mat., 181 (2010) 986 - 995.

Uptake of toxic metal ions from water by naked and monolayer protected silver nanoparticles: An X-ray photoelectron spectroscopic investigation, M. S. Bootharaju and T. Pradeep, J. Phys. Chem. C, 114 (2010) 8328 - 8336.

Luminescent Ag­7 and Ag8 clusters by interfacial synthesis, T. Udaya Bhaskara Rao and  T. Pradeep, Angew. Chem. Int. Ed., 49 (2010) 3925 - 3929.

Noble metal nanoparticles for water purification: A critical review, T. Pradeep andAnshup, Special Feature, Thin Solid Films, 517 (2009) 6441-6478.

Pesticide filter debuts in India, K. Jayaraman, Chemistry World, May 2007.

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