Professor Marta I. Litter was born in BuenosAires,Argentina. She holds a degree and a Doctorate in Chemistry from the University of Buenos Aires, Argentina. She performed a Postdoctoral stage at the University of Arizona, USA, in Polymer Chemistry (1983). She is the Head of Remediation Technologies Division, National Atomic Energy Commission, Argentina, Principal Researcher, National Research Council (CONICET,Argentina) and Full Professor of the University of General San Martín, Argentina. She has written more than 150 scientific publications. She has coordinated several projects on water treatment, mainly in Advanced Oxidation Technologies. She was also Coordinator of the CYTED IBEROARSEN Network (2006-2009).
She received the Mercosur Prize 2006 in Science and Technology, Technologies for Social Inclusion, for the Project: "Potabilization of water by low-cost technologies in isolated rural zones of Mercosur" and the Mercosur Prize 2011 in Science and Technology, Technologies for Sustainable Development, for the Project: "The problem of arsenic in the Mercosur.An integrated and multidisciplinary approach to contribute to its resolution."
At present she is President of the Local Organizing Committee of the 5th International Congress on Arsenic in the Environment (As2014) to be held in Buenos Aires, Argentina, from 11 to 16 May 2014.

Professor Roberto J. Candal, born 1960 in Argentina, holds a degree in Chemistry and a doctorate in the field of Inorganic Chemistry from the University of Buenos Aires. He held a three year position as Post-doc at the Water Chemistry Laboratory, University of Wisconsin, Madison WI, USA. His interests in research are focused on the development of newmaterials with application in water or air remediation, photocatalysis, sol-gel chemistry and water chemistry. Dr. Candal is co-author of more than 50 scientific publications in peer reviewed international journals and books. He has directed or co-directed three PhD Thesis; at present, he is directing three PhDThesis in environmental chemistry. Since 2010 he is Associate Professor at the National University of San Martín, Argentina, and Independent Researcher at the National Research Council ofArgentina (INQUIMAE-CONICET). Dr. Candal is a founding member ofArgentina Society for Science and Environmental Technology (SACyTA).

Dr. J. Martín Meichtry was born in 1977 in Colón, Entre Ríos, Argentina. He is Doctor in Engineering from the University of Buenos Aires (2011). Presently he is Researcher at the Remediation Technologies Division, Chemistry Management, National Atomic Energy Commission, Argentina, Assistant Researcher of the National Research Council of Argentina (CONICET) and Assistant Professor at the Chemistry Department, Buenos Aires School of the National Technological University, Argentina. He is author of 10 scientific publications, mainly in international journals of high impact in physical chemistry and environmental sciences, 4 chapters of books and many technical reports. He has more than 50 presentations in national and international congresses and other scientific meetings. He has participated in three prized presentations: Environmental Chemistry session, VI Congress Latin America SETAC (2003), Innovar Prize from MINCYT Argentina (2009) and Environmental Technology and Engineering section, COPIME Environmental Science Congress (2011). He has participated in 16 projects on water treatment, especially on Advanced Oxidation Technologies and more especially on Heterogeneous Photocatalysis. He is reviewer of the Chemical Engineering Science, Water Research and Chemical Engineering Science (ELS).