BROWSE

Related Researcher

Author

Kwon, Young-Nam
Superior Membrane-based Advanced Research & Technology (SMART) Lab
Research Interests
  • Membrane, Reverse(Forward) osmosis, Membrane distillation, Hydrate-induced ice desalination

ITEM VIEW & DOWNLOAD

Acid-catalyzed hydrolysis of semi-aromatic polyamide NF membrane and its application to water softening and antibiotics enrichment

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Acid-catalyzed hydrolysis of semi-aromatic polyamide NF membrane and its application to water softening and antibiotics enrichment
Author
Jun, Byung-MoonLee, Hyung KaeKwon, Young-Nam
Keywords
Water softening; Enrichment of antibiotics; Acid-catalyzed hydrolysis; Post-treatment; Semi-aromatic membrane
Issue Date
201801
Publisher
ELSEVIER SCIENCE SA
Citation
CHEMICAL ENGINEERING JOURNAL, v.332, no., pp.419 - 430
Abstract
The effect of post-treatment by acid-catalyzed hydrolysis of a commercial NE70 semi-aromatic polyamide (PA) membrane was systemically investigated to determine feasibility of use in water softening and antibiotic enrichment applications. The surface of a post-treated PA membrane was characterized using various analytical tools: SEM (Scanning Electron Microscopy) for surface morphology, ATR-FTIR (Attenuated Total Reflectance-Fourier Transform Infrared spectroscopy) for chemical bonds, contact angle for hydrophilicity of membrane surface, and electrophoretic light scattering spectrophotometer for surface charge of membrane surface. Conversion of amide groups to amine and carboxyl groups by post-treatment increased hydrophilicity and absolute value of surface charge as well as pore size and molecular weight cut off (MWCO) value. Post-treated membrane under optimal condition showed enhancement of water flux (∼10%) as well as ∼20% ideal selectivity (Na+/Mg2+) for water softening using a single electrolyte solution. In addition, mixture selectivity (Na+/Mg2+) using a mixture solution at pH 3 was also improved ∼2.6 times. Post-treated membranes at pH 0.25 for 7 and 14 days as optimization points were also applied to enrichment of antibiotics which are erythromycin (ERY) and vancomycin (Van). Optimized post-treatment membranes showed higher water flux and lower NaCl rejection as well as competitive rejection of antibiotics when compared to virgin NE70 membrane or other commercial/fabricated membranes. The approach to post-treatment of semi-aromatic membrane by the acid-catalyzed hydrolysis method can be utilized as a multipurpose usage in the future depending on characteristics of the target compound (e.g. surface charge (positive/negative) or size diversity).
URI
Go to Link
DOI
http://dx.doi.org/10.1016/j.cej.2017.09.062
ISSN
1385-8947
Appears in Collections:
UEE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU