Hydrogen‐based tubular catalytic membrane for removing nitrate from groundwater

Abstract A porous tubular ceramic membrane coated with palladium‐cupper (Pd‐Cu) catalyst on its surface was prepared and evaluated for catalytic reduction of nitrate from groundwater. Nitrate reduction activity and selectivity with the catalytic membrane were compared with Pd‐Cu/A12O3 catalyst particles. The catalytic membrane reactor exhibited a better selectivity by enabling an effective control of hydrogen gas, thus minimizing ammonium production. No leaching of palladium and copper into aqueous phase was observed, thereby indicating a high chemical stability of the metallic ions on the carrier support. This was also evidenced by the X‐ray photoelectron spectroscopy (XPS) profiles of fresh and used catalysts, which showed no significant difference in surface compositions. Due to its higher selectivity in nitrate reduction and better flexibility in terms of operating conditions, the tubular catalytic ceramic membrane could be useful in removing nitrate from groundwater.

[1]  B. Rittmann,et al.  Hydrogen-based hollow-fiber membrane biofilm reactor (MBfR) for removing oxidized contaminants , 2004 .

[2]  Guang-hao Chen,et al.  Appropriate conditions or maximizing catalytic reduction efficiency of nitrate into nitrogen gas in groundwater. , 2003, Water research.

[3]  G. Luk,et al.  EXPERIMENTAL INVESTIGATION ON THE CHEMICAL REDUCTION OF NITRATE FROM GROUNDWATER , 2002 .

[4]  Dominique Martinez,et al.  Nitrate contamination of a rural aquifer and accumulation in the unsaturated zone , 2002 .

[5]  Galip Akay,et al.  Drinking water denitrification by a membrane bio-reactor. , 2002, Water research.

[6]  A. Elmidaoui,et al.  Pollution of nitrate in Moroccan ground water: removal by electrodialysis , 2001 .

[7]  K. J. Reddy.  Nitrate removal from groundwater using catalytic reduction , 2000 .

[8]  B. Rittmann,et al.  A novel hollow-fibre membrane biofilm reactor for autohydrogenotrophic denitrification of drinking water , 2000 .

[9]  U. Prüße,et al.  Improving the catalytic nitrate reduction , 2000 .

[10]  G. Genon,et al.  Groundwater nitrate removal: comparison between reverse osmosis and heterotrophic bacterial process , 2000 .

[11]  A. Lecloux.  Chemical, biological and physical constrains in catalytic reduction processes for purification of drinking water , 1999 .

[12]  A. Pintar,et al.  Catalytic hydrogenation of aqueous nitrate solutions in fixed-bed reactors , 1999 .

[13]  H. Anderson,et al.  Public response to elevated nitrate in drinking water wells in Wisconsin. , 1999, Archives of environmental health.

[14]  R. Dittmeyer,et al.  Studies on the use of catalytic membranes for reduction of nitrate in drinking water , 1999 .

[15]  K. Peinemann,et al.  Nitrate removal of drinking water by means of catalytically active membranes , 1998 .

[16]  Thiruvenkatachari Viraraghavan,et al.  Nitrate Removal From Drinking Water—Review , 1997 .

[17]  M. Čeh,et al.  Characterization of supported Pd-Cu bimetallic catalysts by SEM, EDXS, AES and catalytic selectivity measurements , 1997 .

[18]  J. Levec,et al.  Kinetics of the catalytic liquid-phase hydrogenation of aqueous nitrate solutions , 1996 .

[19]  Roy F. Spalding,et al.  Occurrence of nitrate in groundwater-a review , 1993 .

[20]  K. Vorlop,et al.  Development of catalysts for a selective nitrate and nitrite removal from drinking water , 1993 .

[21]  M. Kanarek,et al.  Gastric cancer mortality and nitrate levels in Wisconsin drinking water. , 1992, Archives of environmental health.

[22]  K. Vorlop,et al.  Erste Schritte auf dem Weg zur edelmetallkatalysierten Nitrat‐ und Nitrit‐Entfernung aus Trinkwasser , 1989 .

[23]  J. Bourne,et al.  Biological denitrification of drinking water using autotrophic organisms with H2 in a fluidized‐bed biofilm reactor , 1987, Biotechnology and bioengineering.