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dc.contributor.authorRichards, Laura A.
dc.contributor.authorRichards, Bryce S.
dc.contributor.authorSchäfer, Andrea
dc.date.accessioned2011-01-19T16:14:36Z
dc.date.available2011-01-19T16:14:36Z
dc.date.issued2011
dc.identifier.citationRichards, L. ; Richards, B.S. ; Schäfer, A.I. ; (2011) Renewable energy powered membrane technology: Effect of contaminant speciation on retention and membrane deposition, Journal of Membrane Science, (accepted 26/11/2010).en
dc.identifier.urihttp://hdl.handle.net/1842/4667
dc.description.abstractThe objective of this study was to evaluate the effects of fluctuating energy and pH on retention of dissolved contaminants from real Australian groundwaters using a solar (photovoltaic) powered ultrafiltration – nanofiltration/reverse osmosis (UF-NF/RO) system. Four NF/RO membranes (BW30, ESPA4, NF90, and TFC-S) were used. Energy fluctuations affected pressure and flow. Solar irradiance levels impacted retention of fluoride, magnesium, nitrate, potassium, and sodium where convection/diffusion dominated retention. Retention of calcium, strontium, and uranium was very high and independent of solar irradiance, which was attributed to a combination of size and charge exclusion and for some solutes sorption and precipitation. Groundwater characteristics affected retention and the solutes were categorized into two groups according to retention as a function of pH: (1) pH independent retention (arsenic, calcium, chloride, nitrate, potassium, selenium, sodium, strontium, and sulfate); and (2) pH dependent retention (copper, magnesium, manganese, molybdenum, nickel, uranium, vanadium, and zinc). The retention of Group 1 solutes was typically high and attributed to steric effects. Group 2 solutes had dominant, insoluble species under certain conditions which led to deposition on the membrane surface (and thus varying apparent retention). The renewable energy membrane system removed a large number of groundwater solutes reliably over a range of real energy and pH conditions.en
dc.language.isoenen
dc.publisherElsevieren
dc.subjectNanofiltrationen
dc.subjectreverse osmosisen
dc.subjectinorganic contaminant removalen
dc.subjectphotovoltaicsen
dc.subjectgroundwateren
dc.titleRenewable energy powered membrane technology: Salt and inorganic contaminant removal by nanofiltration/reverse osmosisen
dc.typeArticleen
dc.identifier.doi10.1016/j.memsci.2010.11.069en


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