Lakshmanan, D, D. A. Clifford, and G. Samanta, “Arsenic Removal by Coagulation with Aluminum, Iron, Titanium, and Zirconium”, Accepted for publication in Journal American Water Works Association, July 3, 2007. Liu, X, D. J. Roberts, T. Hiremath, D. A. Clifford, T. Gilloghly, S. Lehman, “Divalent Cation Addition (Ca2+ or Mg2+) Stabilizes Biological Treatment of Perchlorate and Nitrate in Ion Exchange Brine”, Environmental Engineering Science, 24 (6), pp 1-11, 2007. Samanta, G, and D. A. Clifford, “Influence of Sulfide on Preservation and Speciation of Inorganic Arsenic in Drinking Water", Chemosphere, V 65, pp 847-853, 2006. Karori, S, D.A. Clifford, G. Ghurye, and G. Samanta, “Development of Field Speciation Method for Inorganic Arsenic Species in Groundwater” Journal American Water Works Association, 98:5, pp 128-41, May, 2006. Tripp, A. R., and D. A. Clifford, “Ion Exchange for the Remediation of Perchlorate in Drinking Water”, Journal American Water Works Association, 98 (4), pp 105-114 April, 2006.

Samanta, G, and D.A. Clifford, “Preservation and Speciation of Inorganic Arsenic Species in Groundwater, Water Quality Research Journal of Canada, Vol. 7, No. 2, pp 107-116, July, 2006. Hiremath, T., D. J. Roberts, X. Lin, D.A. Clifford, T. Gillogly and G. Lehman, “Biological Treatment of Perchlorate in Spent ISEP Ion-Exchange Brine”, Environmental Engineering Science, V. 23, No. 6, 109-1016; Zhu, B., D. A. Clifford, and S. Chellam, “Electrocoagulation Microfiltration Compared with Chemical Coagulation Microfiltration for Virus Removal”, Water Research, V. 30, No. 13, pp 3098-3108, July, 2005. Samanta, G, and D.A. Clifford, “Preservation of Inorganic Species in Groundwater”, Environmental Science and Technology, V 39 pp 8877-82, Oct 2005. Zhu, B., D. A. Clifford, and S. Chellam, “Virus Removal by Iron Coagulation-Microfiltration”, Water Research, v. 39, pp. 5153-61, Oct. 2005. Zhu, B., D. A. Clifford, and S. Chellam, "Electrocoagulation Microfiltration Compared with Chemical Coagulation Microfiltration for Virus Removal", Submitted to Water Research, Dec 8, 2004.

Lin, X, D. J. Roberts, T. Hiremath, D. A. Clifford, T. Gillogly, G. Lehman, "Divalent Cation Addition (Ca2+ or Mg2+) Stabilizes Biological Treatment of Perchlorate and Nitrate in Ion Exchange Spent Brine", In preparation for Journal American Water Works Association, October 2004. Tripp, A. R., and D. A. Clifford, "Ion Exchange for the Remediation of Perchlorate in Drinking Water", Sumbitted to Journal American Water Works Association, Sept. 2, 2004. Zhu, B., D. A. Clifford, and S. Chellam, "Virus Removal by Iron Coagulation-Microfiltration", In Revision for Water Research, October 28, 2004.Y., D. J. Roberts and D. A. Clifford, "Development of Cultures Capable of Reducing Perchlorate and Nitrate in High Salt Solutions", Water Research, v. 38 No. 14-15, pp 3322-3330, August, 2004. Xu, W., S. Chellam, and D. A. Clifford, "Indirect Evidence for Deposit Rearrangement during Dead-End Microfiltration of Iron-Coagulated Suspensions" Journal of Membrane Science, V. 239, No.2, pp 243-254, August, 2004.

Ghurye, G., D. A. Clifford, A. R. Tripp, "Pilot Study of Coagulation Microfiltration for Arsenic Removal from Groundwater" J. Amer. Water Works Assoc. V. 96, No. 4, pp 143-152, April, 2004.napier air rifle cleaning kit Ghurye, G. and D. A. Clifford, "Arsenic III Oxidation Using Chemical and Solid-Phase Oxidants", J. Amer. Water Works Assoc., V. 96, No. 1, pp 84-96, Jan., 2004.air duct cleaning sarasota Clifford, D.A., G. Ghurye, and A. R. Tripp, "Arsenic Removal from Drinking Water Using Ion-Exchange with Spent Brine Recycling", J. Amer. Water Works Assoc., pp 119-130, V. 35, No. 6, June, 2003. felix air duct cleaningThis paper won the 2004 AWWA Water Science and Research Division Best Paper Award. Chellam, S., and D. A. Clifford, "Physical-Chemical Treatment of Groundwater Contaminated by Leachate from Surface Disposal of Uranium Tailings", ASCE Journal of Environmental Engineering, pp. 942-52, Oct., 2002.

Nedwed, T., and D. A. Clifford, "Feasibility of Extracting Lead from Lead Battery Recycling Soil Using High-Concentration Chloride Solutions", J. Environmental Progress, V. 19, No. 3, pp.197-206, Fall 2000. Ghurye, G. L., D. A. Clifford, and A. R. Tripp, "Combined Arsenic and Nitrate Removal by Ion Exchange", J. Amer. Water Works Assoc., V. 91, No. 10, pp. 85-96, Oct., 1999. Chen, H-W, M. Frey, D. A. Clifford, L, McNeill, and M. Edwards, "Arsenic Treatment Considerations: Raw Water Quality, Cost, and Residual Handling", J. Amer. Water Works Assoc., V. 91, No. 2, pp. 74-85, Feb, 1999. Nedwed, T., and D. A. Clifford, "A Survey of Lead Battery Recycling Sites and Soil Remediation Processes," J. Waste Management, Vol. 17, No. 4, pp. 257-269, 1998. Horng, L. L., and D. A. Clifford, "The Behavior of Polyprotic Anions in Ion-Exchange Resins," J. Reactive and Functional Polymers, Vol. 35, No. 1/2, pp 41-54, December, 1997. Liu, C. X., and D. A. Clifford, "Ion Exchange with Denitrified Brine Reuse," J. Amer. Water Works Assoc., Vol. 88, pp. 88-99, November, 1996.

Connor, J., and D. A. Clifford, "NORM Waste Minimization using In-Situ Treatment Method", Fluid Particle Separation Journal, V. 7, No. 3, pp 118-123, September, 1994. Clifford, D. A., and Z. Zhang, "Combined Uranium and Radium Removal by Ion Exchange", J. Amer. Water Works Assoc., Vol. 86, No. 4, pp. 214-227 April, 1994. Z. Zhang, and D. A. Clifford, "Exhaustion and Regeneration of Resins for Uranium Removal", J. Amer. Water Works Assoc., Vol. 86, No. 4, pp. 228-241, April, 1994. Clifford, D. A., M. Yang, and T. Nedwed, "Feasibility of Extracting Toxic Metals from Soil Using Anhydrous Ammonia," Waste Management, Vol. 13, No. 3, pp 207-219, 1993. Clifford, D. A., S. Chen, C. Reznik, "Volatilizing Toxic Metals from Soil", Waste Management, V. 13, pp 467-479, 1993. Clifford, D. A., and X. Liu, "Biological Denitrification of Spent Regenerant Brine Using a Sequencing Batch Reactor", Water Research, Vol 27, No. 9, pp 1477-84, 1993. Clifford, D. A., and X. Liu, "Nitrate Removal Using Ion Exchange with Batch Denitrification of Spent Regenerant Brine, J. Amer. Water Works Assoc., V 85, No. 4, pp. 135-143, April, 1993.

Clifford, D.A. and E. A. Higgins, "Measurement of 226Ra and 228Ra in Water by Gamma-Ray Counting after Preconcentration on Ion-Exchange Resin," Health Physics, V. 62, No. 5, p. 413-421, May, 1992. Dudzinska, M., and D. A. Clifford, "Anion Exchange Studies of Lead-EDTA Complexes," Reactive Polymers, V 16, p 71-80, Dec. 1991. Subramonian, S., Clifford, D. A., and W. Vijjeswarapu, "Evaluating Ion Exchange for the Removal of Radium from Groundwater," AWWA Journal, pp 61-70, May, 1990. Subramonian, S. and D. A. Clifford, "Aqueous-Phase Ion Solvation and the Selectivity of Ion Exchange Resins for Monovalent Anions," Journal of Solution Chemistry, V. 18, No. 6, p. 529-43, 1989. Clifford, D. A., W. Vijjeswarapu, and S. Subramonian; "Evaluating Various Adsorbents and Membranes for Removing Radium from Groundwater," AWWA Journal, pp 94-104, July, 1988. Woodring, S. L. and D. A. Clifford, "A Comparison of the Graphical and Standard Methods for the Determination of Biochemical Oxygen Demand (BOD)," WPCF Journal, pp. 537-42, April, 1988.

Subramonian, S. and D. A. Clifford, "Monovalent/Divalent Selectivity and the Charge Separation Concept," Reactive Polymers, V. 9, p. 195-209, 1988. Sengupta, A. K., S. Subramonian, and D. A. Clifford, "More on the Mechanism and Some Important Properties of Chromate Ion Exchange," Journal of Environmental Engineering, V.114, pp 137-153, Feb. 1988. Werner, P., D. A. Clifford and G. Strauss, "A New Disinfection Method for Cation Exchange Resin," Vom Wasser, V. 68, pp. 191-97, 1987. Clifford, D. A., T. J. Sorg, and S. Subramonian, "Removing Dissolved Inorganic Contaminants from Water," Enviro. Sci. & Tech., feature article, V. 20, No. 11, pp. 1072-80, 1986. Sengupta, A. K. and D. A. Clifford, "Chromate Ion Exchange Process at Alkaline pH," Water Research, V. 20, No. 9, pp. 1177-84, 1986. Sengupta, A. K. and D. A. Clifford, "Chromate Ion-Exchange Mechanism for Cooling Water," Ind. & Eng. Chem. Fundam., V. 25, No. 2, pp. 249-58, 1986. Sengupta, A. K. and D. A. Clifford, "Some Unique Characteristics of Chromate Ion Exchange, Reactive Polymers, Holland, V. 4, pp. 113-30, 1986.