- Fit-For-Purpose Treatment of Produced Water with Iron and Polymeric Coagulant for Reuse in Hydraulic Fracturing. Produced Water Society Seminar 2020, Houston, TX, February 11-13, 2020.
- Mechanisms of Virus Control by Electrocoagulation: Removal and Inactivation. AIChE Annual Meeting, Orlando, FL, November 10-15, 2019.
- Plenary talk. Third International Congress on Green Chemistry and Engineering, Monterrey, Mexico, September 4-6, 2019.
- The ninth Annual Wesley Eckenfelder Lecture Series: Municipal Resource Recovery: The Water-Energy Nexus, San Antonio, TX July 19, 2019.
- Membrane Considerations for Potable Water Reuse, (2017) The Seventh Annual W. Wesley Eckenfelder Lecture Series: Municipal Resource Recovery: Applications and Research. Austin, TX. July 14, 2017.
- Boron removal from hydraulic fracturing wastewater by electrocoagulation: Mechanisms and process considerations, (2016) Colloidal & Surface Phenomena, 72nd American Chemical Society Annual Southwest Regional Meeting, Galveston, TX, November 10 – 13, 2016.
- Electrocoagulation mechanisms during water and wastewater treatment: Insights from removal of viruses and boron, (2016) Colloidal & Interfacial Chemistry for Water Treatment & Recycling Session, Division of Colloid and Surface Chemistry, 252nd ACS National Meeting, Philadelphia, PA, August 21-25, 2016.
- Electrochemical Pretreatment for Surface Water Microfiltration: Membrane Fouling Mechanisms and Control, (2014)Presentation at the Oil & Gas and Chemical Processing Filtration and Separation Conference, March 25 – 26, Houston, Texas.
- Metals in the Air We Breathe and Microorganisms in the Water We Drink: Characterization and Purification (2014) Presentation at the Houston Global Health Collaborative Connect Conference, March 22 – 23, Houston, Texas.
- Virus Inactivation is Mediated by Singlet Oxygen in Photosensitized Fullerol Nanoparticle Suspensions, (2013) Presentation at the XXII International Materials Research Congress (IMRC 2013), Materials Research Society, August 11 – 14, Cancun, Mexico.
- Measurements of Rare Earth Elements to Identify Primary Aerosol Emissions from Petroleum Refineries, (2012) Presentation to the Regional Air Quality Planning Committee (RAQPC) of the Houston-Galveston Area Council, October 25, Houston, Texas.
- Membrane Technologies for Advanced Water and Wastewater Treatment, (2010) Keynote address at “EnviroVision” Annual Conference of the Indian Environmental Association, Indian Institute of Technology – Bombay, November 22 – 25, Mumbai, India.
- Virus Inactivation by Photosensitized Fullerol Nanoparticles, (2010) Keynote address at “EnviroVision” Annual Conference of the Indian Environmental Association, Indian Institute of Technology – Bombay, November 22 – 25, Mumbai, India.
- Identifying Fine and Coarse Particulate Matter Emissions from Industrial Sources, (2010) Texas Commission on Environmental Quality (TCEQ) Annual air investigators training sessions, October, San Antonio, TX.
- Electrocoagulation and Membrane Filtration: Emerging Technologies for Produced Water Treatment, (2009) Petroleum Environmental Research Forum (PERF), November 17 – 19, Houston, TX.
- Lanthanoid Metals as Elemental Markers for Tracking Primary Fine Particulate Matter Emissions from Petroleum Refining Operations, (2009) Texas Commission on Environmental Quality (TCEQ) Annual training session, October 26 – 29, Galveston, TX.
- Bacterial Fouling of Microfiltration Membranes, (2009) Keynote address at the International Water Association conference on “Particle Separations and Nanoparticles in Water”, June 3 – 5, Duke University, Durham, NC.
- Selected Aspects of Microfiltration and Nanofiltration Related to Fabrication, Fouling, and Permselectivity, (2008) Advances in Membrane Research session, American Water Works Association’s Water Quality Technology Conference (WQTC), November 16 – 19, Cincinnati, OH.
- Municipal Water Treatment using Membranes: An Academic Perspective, (2007) Keynote address at the Seoul International Symposium on Waterworks Technology, August 28 – 29, Seoul, South Korea.
- Mechanisms and Control of Biological Fouling of Microfiltration Membranes, (2007) Fouling Phenomena in Water Quality Applications session, AIChE National Meeting November 4 – 9, Salt Lake City, UT.
- Towards a Better Understanding of Seasonal Effects on Nanofiltration Membrane Performance: Water Permeability and Sieving, (2004) French-Texan Workshop on Potable Water and Water Treatment. Sponsored by The Office of Science and Technology of the French Embassy in the USA and The Environmental and Energy Systems Institute of Rice University. January 12 – 13, Houston, TX.
- Panelist in Research Workshop, The Future of Desalination in Texas, April 9th 2003, University of Texas, Austin, TX.
- Scale-Up Methodology for Municipal Water Nanofiltration Based on Permeate Water Quality, (2003) Pre-Conference workshop on “Membrane Scale-Up”, AWWA Membrane Technology Conference and Exhibition, March 2 – 5, Atlanta, GA.
- Quality and Membrane Treatability of the Lake Houston Water Supply, (2001) Texas Agricultural Experiment Station, College Station, TX. (with R.R. Sharma)
- Disinfection By-Product Precursor Removal by Nanofiltration, (2000) Disinfection Using Membranes in “AWWA Annual Conference and Exposition”, June 12, Denver, CO.
- How Cl2 Disinfects, How SO2 Dechlorinates, and Their Effects on Receiving Streams, (1999) Advanced Topics Session in “TNRCC Water Quality Inspector Annual Training Seminar”, October, Houston, TX.
- Particle Fouling of Pilot-Scale Low Pressure Membrane Filters, (1999) “Membrane Modeling – From Concepts to Practice”, AWWA Annual Conference and Exposition, June, Chicago, IL.
- The Emerging Role of Membrane Filtration in Water Treatment, (1998) “Changing Role of Turbidity and Particle Removal in the Water Treatment Industry”, Research Workshop Virginia Section of the AWWA, University of Richmond, Richmond VA.