dc.contributor.author | De Munari, Annalisa | |
dc.contributor.author | Schäfer, Andrea | |
dc.date.accessioned | 2010-11-15T11:52:14Z | |
dc.date.available | 2010-11-15T11:52:14Z | |
dc.date.issued | 2010 | |
dc.identifier.citation | De Munari, A. ; Schäfer, A.I. ; (2010) Impact of speciation on removal of manganese and organic matter using nanofiltration, Journal of Water Supply: Research and Technology - Aqua, ‘Membranes in Drinking Water Treatment’, invited special issue paper. Journal of Water Supply: Research and Technology, AQUA, 59, 2–3, 152-163. | en |
dc.identifier.uri | http://dx.doi.org/10.2166/aqua.2010.067 | |
dc.identifier.uri | http://hdl.handle.net/1842/4264 | |
dc.description.abstract | The removal of manganese and humic acid (HA) by two nanofiltration membranes, TFC-SR2 and
TFC-SR3, was investigated in order to highlight the influence of speciation on manganese and HA
retention. Manganese speciation and complexation with HA were modelled to understand how
speciation could affect NF removal mechanisms. The behaviour of the two membranes was
drastically different for manganese retention. Manganese retention for TFC-SR3 was higher and
dominated by size exclusion. Manganese retention for TFC-SR2 varied with pH. At pH 7, i.e. the
pH of most natural waters, manganese retention for TFC-SR2 was about 45% versus 90% of TFCSR3,
with fluxes of about 75 and 25 L.m-2h-1, respectively. Both membranes showed very high
retention of HA (about 80%), being therefore suitable for surface waters where no salt removal is
required. Manganese deposit on both membranes was generally low (< 10%), but increased at pH
10 and 12 as manganese deposited as precipitated MnCO3, and the membranes showed a yellowbrownish
layer. | en |
dc.language.iso | en | en |
dc.publisher | IWA Publishing | en |
dc.subject | humic acids | en |
dc.subject | nanofiltration | en |
dc.subject | speciation | en |
dc.title | Impact of speciation on removal of manganese and organic matter by nanofiltration | en |
dc.type | Article | en |