Argon and nitrogen beams influencing membrane permeate fluxes and microbial growth

作者：Wanichapichart P^*; Taweepreeda W; Choomgan P; Yu L D

来源：Radiation Physics and Chemistry, 2010, 79(3): 214-218.

DOI：10.1016/j.radphyschem.2009.08.040

• Ion beam
• Membrane flux
• FT-IR analysis
• Bacterial growth

Porous cellulose and dense chitosan membranes were bombarded with argon and nitrogen-ion beams using two energy levels, 30 and 120 keV, of the same fluency of 5 x 10(14) ions/cm(2) for a comparison study. The results revealed that both beam types reduced the hydraulic permeability of the membranes. Using a NaCl solution of 4000 ppm concentration as feed, the ability to reject salt of dense chitosan membrane was reduced only if it was pretreated with 120 keV nitrogen-ion beams. A Fourier Transform Infrared Spectroscopy study showed that molecular weight of chitosan was possibly decreased after the bombardment with 120keV beams. The analysis of the cellulose membranes revealed that a dense structure was created without affecting the OH functional groups. This study found that only chitosan membranes possessed an anti-fungi property if being implanted with positive charges of nitrogen or argon ions of 120 keV.

• 出版日期2010-3