Other Presentations and Publications:


 
Zhang, C., Valsaraj, K.T.,  Constant, W.D., Roy, D., “Nutrient  and Surfactant Enhancement for the Biodegradation of Chlorinated Hydrocarbons in Wastewater from a Louisiana Site”, Proceeding of the I&EC Special symposium on Emerging Technologies in Hazardous Waste Management, IX< American Chemical Society, Pittsburgh, PA, September 15-17, 1997.

Zhang, C., Valsaraj, K.T.,  Constant, W.D., Roy, D., “Aerobic Biodegradation of Surfactants Applied in Soil Washing for the Clean-up of a Louisiana Superfund Site”, Proceeding of the I&EC Special symposium on Emerging Technologies in Hazardous Waste Management, IX< American Chemical Society, Pittsburgh, PA, September 15-17, 1997.

Liu, G., Chen, C.F., Maillacheruvu, K.Y. and Roy, D.  "Remediation of Pyrene-Contaminated Soil Using In-Situ Surfactant Washing", Annual Conference of the New York Water Environment Association, January 1997.

Buck, L., Maillacheruvu, K.Y., Roy, D.  "Photocatalytic degradation of polynuclear aromatic hydrocarbons in the presence of different types of surfactants", Annual Conference of the New York Water Environment Association, January 1997.

Alam, S.N., Roy, D., Maillacheruvu, K.Y.  "Modeling and Associated Risk Assessment of VOC Emissions from POTWs", Annual Conference of the New York Water Environment Association, January 1997.

Maillacheruvu, K.Y., Buck, L., Roy, D., "Photocatalytic degradation of naphthalene in the presence of anionic, cationic and neutral surfactants, American Chemical Society, I&EC Division Symposium, Birmingham, AL Sept. 1996.

Maillacheruvu, K.Y. and D. Roy, "Impact of Surfactant and organic contaminant characteristics on the photocatalytic process".  American Institute of Chemical Engineers' 1996 Spring National Meeting, Emerging Waste Treatment Technologies, February, 1996.

Roy., D., “ Application of Natural Surfactants for Hazardous Waste Site Remediation”, Invited Presentation, Engineering Foundation Meeting on Bioremediation, West Palm Beach, Florida, January, 1996.

Kommalapati, R.R., Valsaraj, K.T., Constant, W.D., Roy, D., “ Remediation of Contaminated Soils using Plant Based Surfactants”, I&EC Special Symosium on Emerging Technologies in Hazardous Waste Management, ACS,  Birmingham, AL, Sept. 1996.

Constant, W.D., Chaphalkar, P.G., Valsaraj, K.T.,  Roy, D., “ Application of Colloidal Gas aphrons for in-situ Soil washing at the Petroprocessor Superfund Site—Ex-situ Demonstration Results” , AIChE 1996 Spring National Meeting, New Orleans, La, Feb, 1996. 

Maillacheruvu, K.Y., A. Michalapoulos and D. Roy, "Photocatalytic post-treatment of surfactant-laden washwater from hazardous waste sites".  Abstr. World Environmental Congress, London, Ontario, Canada, September, 1995.

Adrian, D.D., Zhang, Y., Roy, D., and Pardue, J., " Sugarcane Factory wastewater in a Diked Natural Wetland, IAWQ Intl. Seminar on Natural and Constructed Wetland for Wastewater Treatment and Reuse", Oct. 26-28, 1995,  Perugia, Italy.

Chaphalkar, P.G., Valsaraj, K.T., Constant, D., and Roy, D., " Augmentation of In-situ Subsoil Remediation using Colloidal gas Dispersions",  I&EC Special Symposium, American Chemical Society, Sept. 17-20, 1995, Atlanta, Georgia.

Kommalapati, R.R, and Roy, D., " "Application of a Plant based Natural Surfactant for soil Flushing" ,  I&EC Special Symposium, American Chemical Society, Sept. 17-20, 1995, Atlanta, Georgia.

D. D. Adrian, D. Roy, K.S. Ro, "Receiving Water Impacts and Standards Development for Sugar Cane Factory Wasyewater Discharged from Diked Wetlands",  AWRA Fall Symposium, Baton Rouge, LA, Oct 1994.

Chung, K.H., K.S. Ro, and D. Roy., "Anaerobic Biotransformation of Atrazine in Wetland Sediment", Proc. Water Environment Federation, 67th Annual Conference, Cigago, Il, Oct., 1994.

Constant, W.D., D. Roy, and K.T. Valsaraj, "An Investigation into the In-situ Application of Colloidal Gas Aphrons to Enhance Pump and Treat Remediation of Hazardous waste Sites", UCOWR Annual Meeting, Big Sky, Montana, Aug 2-5, 1994.

D. Roy, Kommalapati, R.R, Chaphalkar, P.G. "In-Situ Soil Flushing of Non Aqueous Phase Organic Liquids Using Colloidal Gas Aphron Suspensions and Conventional Surfactant Solutions", Proc. Annual Meeting Air Waste management, Cincinnati, Ohio, June 19, 1994.

D. Roy, "Colloidal Gas Aphrons in Remediation", Conf. on Environmental Concerns, Public Policies, and Remediation Technologies, June 24-25, 1993. 

D. Roy., Javier Mouthon, and A. Jackson, "Direct Bioregeneration of Activated Carbon Beds",  Presentation at the American Water Resources Association, Louisiana Section, Oct. 27, Baton Rouge, LA, 1993.

A. Jackson and D.Roy, "Enhanced Transport of Bacteria Through Soil Matrices Using Surfactant and Colloidal Gas Aphrons", Presentation at the Intl.In-situ and On-site Bioremediation, San Diego, CA, March 1993. 

D. Roy, and P.G. Chaphalker, "Application of CGA for Environmental Remediation", Presentation at Environmental Concerns, Public Policies, and Remediation Technologies, Amer. Soc. Env. Sci., Sept 24-25, Baton Rouge, LA, 1993.

A. Tamayo, and D. Roy, "The use of Colloidal Gas Aphrons and Surfactants in washing Soil contaminated with 2,4-D", Presentation at the AIChe 1992 Summer National meeting, Minneapolis, MN, August 1992.
 
D. Roy, and A. Tamayo, "Application of Surfactant and Colloidal gas aphrons in Washing Soil Contaminated with 2,4-D", Presented at the USEPA Symposium  on In-Situ Treatment of Contaminated Soil and Water, Cincinnati, Ohio, Feb. 1992.

D. Roy, "Application of Colloidal Gas Aphrons for Soil Washing and Groundwater Remediation", Presented at the Conf. on Hazardous Materials and Discharges, Amer. Society of Environmental Sciences and LWRRI, Baton Rouge, April 1992.

Liu, Minwen, and D. Roy, "In-situ soil washing by Surfactants", presented at the 121st. Annual Meeting of American Society of Mining, Metallurgy and Exploration, Phoneix, Arizona, Feb. 1992.

Roy, D and R. B. Boudreau, "Biodegradation of Industrial Waste Using Fixed Film Systems", Industrial waste Symposium, Baton Rouge, Louisiana, March 1992.

K.T. Valsaraj and D.Roy, "Fundamental Properties of Colloidal Gas Aphrons", Presented at the 23rd annual Meeting of the Fine Particle Society, Las Vegas, Nevada, July 13-17, 1992.

D. Muirhead, D. Roy, and D.D. Adrian, " Conceptual Model of Movement of Colloidal Gas Aphrons in Aqueous Column and in a Porous Medium", Presented at the 23rd annual Meeting of the Fine Particle Society, Las Vegas, Nevada, July 13-17, 1992.

A. Jackson and D.Roy, " Movement of Microorganisms with Colloidal Gas Aphrons in a Porous Medium", Presented at the 23rd annual Meeting of the Fine Particle Society, Las Vegas, Nevada, July 13-17, 1992.

P. G. Chaphalkar, R. Kommalapati, M. W. Liu, and D. Roy, " In-situ soil Washing with Colloidal Gas Aphrons", Presented at the 23rd annual Meeting of the Fine Particle Society, Las Vegas, Nevada, July 13-17, 1992.

C. Hinz, P. Chaphalkar, D.D. Adrian and D. Roy, " Solute Mixing in Packed Soil Columns as affected by Microbubble Content, Column Length, and Flow Velocity", Presented at the 23rd annual Meeting of the Fine Particle Society, Las Vegas, Nevada, July 13-17, 1992.

V. Gopu, D.Roy, and D.D. Adrian, " Effect of Microbubble Admixture on Concrete Properties", Presented at the 23rd annual Meeting of the Fine Particle Society, Las Vegas, Nevada, July 13-17, 1992.

H. Moustafa and D.Roy,  " An Assessment of a Slurry-Type System for the Biodegradation of Aniline in Soil.", Presentation at In-Situ and On-Site Bioreclamation: An International Symposium,Battelle Lab, San Diego, California, March 19-21, 1991.

D. Roy, and S. Kottai, "Application of Colloidal Gas Aphrons in the Seperation of Organic Dyes", Submitted for Presentation at Hazardous Materials Control Research Institute Conference, Houston, Texas, April 24-26, 1991.

D. Roy, and V. J. Amedee, "Use of Microbubble Dispersions to Remove Heavy Metals and Organics from Drilling Fluids", Presented at American Filtration Society National Fall Meeting on Environmental and Productivity Merits of Separation in Petroleum Engineering, Baton Rouge, Louisiana, Oct. 29-30, 1990.

Dipak Roy, " Colloidal Gas Aphrons for Soil Washing and Groundwater Remediation", Presented at the Seventh Annual Louisiana Water Resources Symosium, Baton Rouge, LA, Oct. 30-31, 1990.

Dipak Roy, and Vincent J. Amedee, "Treatability of Water-Based Drilling Fluids Using Colloidal Gas Aphrons", Accepted for Presentation at the International Congress on Innovation, Industrial Progress and Environment, Paris, France, June 4-6, 1991.

Vincent J. Amedee, Dipak Roy, Barbara Shane and Andrew Wojtanowich, " A Comparison Between the Microtox and Mysidopsis bahia Bioassays for Assessing Water-Based Drilling Fluid Toxicity", Presentation at the Second International Conference on Waste Management in the Chemical and Petrochemical Industries- Toxic Management, New Orleans, Louisiana, June 17-20, 1991.

Dipak Roy, and Vincent J. Amedee, "Removal of Heavy Metals and Organics from Drilling Fluids by Colloidal Gas Aphrons", Presentation at the Second International Conference on Waste Management in the Chemical and Petrochemical Industries- Toxic Management, New Orleans, Louisiana, June 17-20, 1991.

Roy, D., and Mitra, S., "Biodegradation of Chlorophenoxy Herbi-cides."  Proc. l2th Annual Hazardous Waste Symposium, USEPA, Cincinnati, l986.

Singh, N., Sebuktekin, I., Roy, D., Adrian, D. D., "A Study on the Biodegradation of Pesticides in Soil," Proc. Intl. Symp. on Environmental Management, Istanbul, Turkey, June, l987.

Roy, D., "Biodegradation of Chlorinated Organic Compounds," Presented at the Engineering Foundation Conference, Henniker, New Hampshire, June, l986.

Sebuktekin, I., Singhal, N., Roy, D., "Effects of Mercury on the Biodegradation of 2,4-Dichlorophenoxy Acetic Acid (2,4-D) by Two New Pseudomonas Isolates," Presented before the Division of Environmental Chemistry, Annual Meeting of American Chemical Society, New Orleans, LA, Aug., l987.

Roy, D., Singhal, N., "Kinetics of Biodegradation of 2,4-D by Two New Pseudomonas Isolates," Report published by Hazardous Waste Research Center, Louisiana State University, Baton Rouge, LA, Sept., l986.

Roy, D., Adrian, D. D., Singhal, N., Sebuktekin, I., "Effect of Mercury Toxicity on the Biodegradation of Pesticides," Presented at the Annual Meeting of Louisiana Water Pollution Control Assoc., New Orleans, LA, April, l987.

Roy, D., Mitra, S., "Degradation of Chlorinated Aromatic Compoudns by Dehalo-genases of Two New Pseudomonas Species," Presented at the 8th Symposium on Biotechnology for Fuels and Chemicals, Gatlinburg, TN, May, l986.

Roy, D., "Biodegradation of Chloroaromatic Chemicals of Agricultural Importance," Keynote Address for Session on Protection of Environment and Other Related Topics, Natl. Symposium on Role of Biotechnology in Crop Protection, Kalyani, India, Jan., l987.

Sebuktekin, I., Singhal, N., and Roy, D., Biodegradation of Herbi-cides 2,4-D and 2,4,5-T."  Proc. Third Intl. Symp. on Environmental Management for Development Countries, Istanbul, Turkey, l986.

Roy, D., "Biological Treatability of Coal Conversion Wastewater by Anaerobic Process," Final Report Submitted to the Center of Energy Studies, LSU, l983.

D. Roy, "Destruction of Hazardous Waste by Photolytic Ozonation - A Case Study".  Invited presentation at 6th World Congress of Inter-national Ozone Institute, Washington, May l983.

D. Roy, and M. E. Tittlebaum, "Destruction of Hazardous Waste by Photolytic Ozonation," Project Report submitted to the Hazardous Waste Research Center, LSU, l983.

D. Roy, "Management and Control of Heavy Metals in the Environment - Review of Workshop I".  Development at Tenth International Conf. on Water Pollution, Technical Report, USEPA Grant No. R807269-0l-l, November l980.

D. Roy, M. E. Tittlebaum, R. Knox, "Destruction of Hazardous Wastes by Photolytic Ozonation", Presented at the Louisiana Conference on Water Supply, Sewerage and Industrial Wastes, Louisiana Wat. Poll. Contr. Assoc., Monroe, LA, March l982.

D. Roy, L. M. Jones, "Methane Generation of Two Stage Anaerobic Process".  Proc. the First International Symposium on Environmental Technology for Developing Countries, Istanbul, Turkey, July l982.

D. Roy, and R. H. Baumann, "Attached Growth Anaerobic Conversion Process".  Proceedings of Bioenergy 84, World Conference and Exhibition, Gothenburg, Sweden, l984.

Roy, D., and Jones, L. M., "Methane Production by Anaerobic RBC."  Proc. Intl. Conf. Energy for the Americas, San Juan, Puerto Rico, l985.

Roy, D., "Attached Growth Anaerobic Process for Municipal Liquid Waste Treatment," Invited Lecture, Presented at the Workshop on Biol. Treatment of Municipal Liquid Waste, Inst. of Urban Management, Calcutta, India, Sept., l986.

Roy, D., Engelbrecht, R. S. Wong, P. K. Y., Chian, E. S. K., "Inactivation of Viruses by Ozone".  Presented at the l0th Int. Wat. Poll. Res. Assoc. Meeting, Toronto, June l980.

R. S. Engelbrecht, C. N. Haas, D. Dunn, J. Shular, D. Roy, B. L. Saverin, A. L. Lalachandani, "Acid-fast Bacteria and Yeasts as Indicators of Disinfection Efficency".  U.S. Environmental Protec-tion Agency Report No. EPA-600-2-79-09l, August l979.

D. Roy, "Mass Transfer; Scale Up and Mathematical Modeling".  Development in llth Annual IAWPR Meeting, Technical Report, USEPA Grant No. R809703-0l-l, Dec. l982.

Ghosh, S., and Roy, D., "Physical Variables Affecting the Process of Contact Flocculation."  Proc. 2nd World Congress on Engineering and Environment, New Delhi, India, Nov. l985.

Bates, D., and D. Roy, "A Simplified Approach for the Selection of Appropriate Technology UPADI-84".  Proceedings of Pan American Congress on Costs and Engineering Economics, Caracas, Venezuela, l984.

D. Roy, "Computational Technique for Chimney Design".  Presented at State Public Health Engineering Conferences, Calcutta, India, l972.

D. Roy, "Inactivation of Enteroviruses by Ozone".  Ph.D. Disserta-tion, University of Illinois at Urbana, l979.

D. Roy, "Economic Design of Wastewater Collection Systems".  M.S. Thesis, Indian Institute of Technology, India, l97l.