Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 240, Issue 1-2, Pages 123-128Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2004.04.018
Keywords
membrane distillation; humic acid; water treatment; microporous hydrophobic membranes; fouling
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Direct contact membrane distillation process has been conducted for the treatment of humic acid solutions using microporous polytetrafluoroethylene and polyvinylidene fluoride membranes. The membranes were characterized in terms of their non-wettability, pore size and porosity. Water advancing and receding contact angles on the top membrane surfaces were measured. Experiments were also carried out employing pure water as feed at different mean temperatures and the water vapor permeance of each membrane was determined. Different humic acid concentrations in the feed solution, pH values and transmembrane temperature difference were tested. The direct contact membrane distillation technique is more adequate for the treatment of humic acid solutions than the applied pressure-driven separation processes, as lower membrane fouling was detected. (C) 2004 Elsevier B.V. All rights reserved.
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