6533b837fe1ef96bd12a3182
RESEARCH PRODUCT
Remediation of Solutions Containing Oxyanions of Selenium by Ultrafiltration: Study of Rejection Performances with and without Chitosan Addition
Julien DeherGrégorio CriniBoukary LamSébastien DéonNadia CriniPatrick Fievetsubject
Environmental remediationGeneral Chemical EngineeringInorganic chemistryUltrafiltrationIonic bondingchemistry.chemical_elementOxyanion02 engineering and technology010501 environmental sciences01 natural sciences[ CHIM ] Chemical SciencesIndustrial and Manufacturing EngineeringMetalChitosanchemistry.chemical_compoundComputingMilieux_MISCELLANEOUS0105 earth and related environmental sciencesGeneral Chemistry021001 nanoscience & nanotechnology6. Clean water[ CHIM.POLY ] Chemical Sciences/PolymersMembrane[CHIM.POLY]Chemical Sciences/Polymerschemistry13. Climate actionvisual_artvisual_art.visual_art_medium0210 nano-technologySeleniumdescription
Among the various technical options for removing ionic contaminants from wastewaters, membrane processes and especially their coupling with polymer addition have been proven to provide worthwhile prospects for the removal of metal cations. Nevertheless, their use for the removal of anionic pollutants such as oxyanions has been little studied in the literature. In the present work, the rejection of oxyanions forms of Se(IV) and Se(VI) by tight ultrafiltration membranes was deeply investigated under various experimental conditions. This paper aims at understanding the mechanisms governing oxyanion rejection and determining the potential ways to improve performances. It is first shown that selenium concentration and salt content play a leading role on performances, with high selenium rejection even if pores are noticeably larger than ions. Additionally, results reveal that the pH value also has a tremendous impact on performances due to its influence on both membrane and selenium charges. Finally, chitosan a...
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-09-05 |