Ultrafiltration of nitrate and heavy metal ions uslng cellulosic membranes

  • Ernesto J. del Rosario Institute of Chemistry, University of the Philippines, Los Baños, Laguna
  • Anna May del Valle Institute of Chemistry, University of the Philippines, Los Baños, Laguna
  • Alma Loreli M. de Jesus Institute of Chemistry, University of the Philippines, Los Baños, Laguna
  • Erwin M. Garcia Institute of Chemistry, University of the Philippines, Los Baños, Laguna
Keywords: ultrafiltration, cellulosics membranes, nitrate removal, heavy metals

Abstract

Ultrafiltration membranes were prepared from cellulose acetate (CA) and N,N-dimethylformamide (DMF) (25:100 w/v) and their permselectivity characteristics were determined. The membranes were used for the separation of NO3-, Pb2+, Cd2+, Zn2+ and Hg2+ using micellar-enhanced ultrafiltration (MEUF). MEUF-based separation of nitrate and heavy metal ions was studied in order to assess the potential of MEUF for remediation of polluted wastewater. Solute rejection coefficient (s values) of nitrate increased from less than 34% in the absence of the cationic surfactant cetylpyridinium chloride (CPC) to more than 88% at CPC concentration above the cmc. For Pb2+ and Cd2+, s values increased from less than 10% in the absence of the anionic surfactant sodium dodecylsulfate (SDS) to greater than 80% and 90%, respectively, at SDS concentration above the critical micelle concentration (cmc). Solute rejection increased from 13% and 28% for Zn2+ and Hg2+, respectively, to more than 85% after MEUF in the presence of 0.001 M SDS.
How to Cite
del Rosario, E. J., del Valle, A. M., de Jesus, A. L. M., & Garcia, E. M. (1). Ultrafiltration of nitrate and heavy metal ions uslng cellulosic membranes. KIMIKA, 18(2), 29-32. https://doi.org/10.26534/kimika.v18i2.29-32
Section
Research Articles