Molecular Structures of Al/Si and Fe/Si Coprecipitates and the Implication for Selenite Removal.

ABSTRACT: Aluminum and iron oxides have been often used in the coagulation processes during water purification due to their unique surface properties toward anions. In the presence of silica, the coprecipitation of Al/Si or Fe/Si might decrease the efficiency of wastewater purification and reuse. In this study, surface properties and molecular structures of Al/Si and Fe/Si coprecipitates were characterized using spectroscopic techniques. Also, the selenite removal efficiency of Al/Si and Fe/Si coprecipitates in relation to their surface and structural properties was investigated. While dissolved silicate increased with increasing pH from Fe/Si coprecipitates, less than 7% of silicate was discernible from Al/Si samples over the range from acidic to alkaline conditions. Our spectroscopic results showe

SUBMITTER: Chan YT 

PROVIDER: S-EPMC4837376 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature