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Institute Lecture on “From materials to clean water: Science, Technology and Industry”

The Indian Institute of Technology, Bombay organised an Institute Lecture on Thursday, June 6, 2019. The details of the lecture are given below:

Title: From materials to clean water: Science, Technology and Industry

Speaker: Professor T. Pradeep

Institute Professor, ‘Deepak Parekh’ Institute Chair Professor and Professor of Chemistry, DST Unit of Nanoscience and Thematic Unit of Excellence, Department of Chemistry, Indian Institute of Technology, Madras

Date: Thursday, June 6, 2019

Time: 5.15 pm

Venue: Room No. 21, VMCC, IIT Bombay


Access to clean water is one of the most important indicators of development. This water has to be affordable to make a meaningful impact on society. A diverse variety of materials are important in accomplishing this objective. Creation of affordable materials for the constant release of silver ions is one of the most promising ways to make water microbially safe. Combining the capacity of diverse nanocomposites to scavenge toxic species such as arsenic, lead, pesticides and other contaminants along with the above capability can result in affordable, all-inclusive drinking water purifiers that can function without electricity. The critical problem in achieving this is the synthesis of stable materials that can release or adsorb ions continuously in the presence of complex species usually present in drinking water that deposit and cause scaling on nanomaterial surfaces. Such constant releasing/adsorbing materials can be synthesized in a simple and effective fashion in the water itself without the use of electrical power. The nanocomposite exhibits river sand-like properties, such as higher shear strength in loose and wet forms. These materials have been used to develop an affordable water purifier to deliver clean drinking water at Rs. 130/y per family. The ability to prepare nanostructured compositions at near ambient temperature has wide relevance for adsorption-based water purification. Such solutions have already been implemented in arsenic affected areas of India and arsenic-free water is being provided to 1,000,000 people every day with such materials. Translation of these results led to the incubation of multiple companies and three of them have their own manufacturing units now. A healthy mixture of basic science, applications and business incubation in the Indian context was manifested and a sample of several new technologies in the pipeline was presented.

About the speaker:

Thalappil Pradeep is an Institute Professor at the Indian Institute of Technology Madras, Chennai, India. He is the Deepak Parekh Institute Chair Professor and is also a Professor of Chemistry. He studied at The University of Calicut, Indian Institute of Science, UC Berkeley and Purdue. His research interests are in molecular and nanoscale materials and he develops instrumentation for such studies. He is an author of over 440 scientific papers in journals and is an inventor of over 100 patents or patent applications. In addition to the work on advanced materials, he is involved in the development of affordable technologies for drinking water purification and some of them have been commercialized. His pesticide removal technology is estimated to have reached about 7.5 million people. Along with his associates, he has incubated five companies and three of them have production units. His arsenic removal technology, approved for national implementation, is delivering arsenic-free water to about one million people every day.

He is a recipient of several awards including the Shanti Swaroop Bhatnagar Prize, BM Birla Science Prize, National Award for Nanoscience and Nanotechnology, India Nanotech Innovation Award and JC Bose National Fellowship. He is the winner of The World Academy of Sciences (TWAS) prize in Chemistry for the year 2018. He is a Fellow of all the science and engineering academies of India and is a fellow of the Royal Society of Chemistry, The World Academy of Sciences and American Association for the Advancement of Science. He is a distinguished professor in a few institutions in India and is also on the graduate faculty of Purdue University. He is the author of the introductory textbook, Nano: The Essentials (McGraw-Hill) and is one of the authors of the monograph, Nanofluids (Wiley-Interscience) and an advanced textbook, A Textbook of Nanoscience and Nanotechnology (McGraw-Hill). He is on the editorial boards of journals such as ACS Nano, Chemistry of Materials, Chemistry-An Asian Journal, Nanoscale, Particle, Scientific Reports, etc., and is an associate editor of ACS Sustainable Chemistry & Engineering. He has authored popular science books in Malayalam, a regional language of India and is the recipient of Kerala Sahitya Academi Award for knowledge literature. In 2015, he received the Lifetime Achievement Research Award of IIT Madras. As part of his philanthropic activities, he supports a school in his village where 500 students are on rolls.