EPA Science Inventory

Chemical treatment of commercial reverse osmosis membranes for use in FO

Citation:

Wang, X., E. Duitsman, N. Rajagopalan, AND V. Namboodiri. Chemical treatment of commercial reverse osmosis membranes for use in FO. DESALINATION. Elsevier Science Ltd, New York, NY, 319:66-72, (2013).

Description:

Commercially available reverse osmosis (RO) membranes – SW30HR, BW30, and AG – were chemically treated for use in forward osmosis (FO). Nitric acid, phosphoric acid, sulfuric acid, ethanol, and ethanol–acid–water ternary solutions were employed for the treatment. All three membranes, after treatment by nitric acid, ethanol, and ethanol–acid–water solutions, demonstrated significant flux enhancement (as much as 40 times higher) compared to their untreated counterparts. The SW30HR membrane treated by ethanol showed the lowest reverse salt flux among the treated membranes. Extensive changes to the barrier layer of the SW30HR membrane after ethanol treatment were observed using ATR-FTIR, XPS, and contact angle measurements. It appears that the PVA coating of the SW30HR membrane was either partially or totally removed. The reduction/removal of the PVA layer in conjunction with higher wettability of the substrate induced by ethanol treatment appears responsible for the improved flux.

Purpose/Objective:

Forward osmosis membrane development

URLs/Downloads:

http://www.sciencedirect.com/science/article/pii/S001191641300146X   Exit

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Completion Date: 06/30/2014
Record Last Revised: 06/30/2014
Record Created: 06/30/2014
Record Released: 06/30/2014
OMB Category: Other
Record ID: 279781

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

SUSTAINABLE TECHNOLOGY DIVISION