Silica

The feasibility of silica removal in RO treatment of groundwater from a Western Australian mining and processing operation to prevent scaling and enhance water recovery was investigated. This study has shown that it is possible to decrease the silica concentration in RO concentrate to levels that wo

In this work we investigate the performance of inorganic membranes in desalination application using a low pressure pervaporation setup. Inorganic membranes were synthesized via a two-step sol–gel catalysed process employing tetraethylorthosilicate as the silica precursor. In addition, non-ligand su

Two types of membranes, the sulfonated PEEK-WC (poly(oxa-p-phenylene-3,3-phthalido-p-phenylene-oxyphenylene) (SPWC) and Krytox-Si-Nafion® (KSiN) composite membranes are proposed for DMFC applications. The properties based on water uptake, ion exchange capacity, proton conductivity, gas permeability,

The performance of commercially available polymeric and microporous silica membranes (both supplied by Sulzer Chemtech GmbH) was investigated with respect to the dehydration of binary mixtures of isopropyl alcohol (IPA)/water. The range of concentrations investigated (CH2O # 20 wt.%) was selected ac

The comparison between two membrane separation processes, like reverse osmosis (RO) and nanofiltration (NF), and the interaction between membrane and pollutant in water cleaning-up were studied. The separation efficiency of pollutants like silica, nitrate, manganese and humic acids (HA) by means of

In many arid regions of the world, the shortage of good quality feed-water is forcing plant owners either to run their membrane systems with undesirable levels of silica or to restrict recovery rates. High silica brines can cause severe and irreversible membrane fouling. Restricting recovery rates i