Selective removal of phosphate from wastewater using hydrated metal oxides dispersed within anionic exchange media.
作者： Nancy Y. Acelas , Benjamin D. Martin , Diana López , Bruce Jefferson
DOI: 10.1016/J.CHEMOSPHERE.2014.02.024
关键词:
摘要: Hydrated ferric oxide (HFeO), hydrated zirconium (HZrO) and copper (HCuO) were immobilized within a microporous anion exchange resin (IRA-400), forming hybrid media for enhanced phosphate removal from aqueous systems. Empirical data batch kinetic trials fitted the pseudo second order mechanism chemical adsorption each was rate limited by intraparticle diffusion overall. These models also used to predict constants equilibrium capacities, which ranged 26.51 30.44 mgP g(-1), 24.15 27.90 g(-1) of calculated experimental respectively. The behavior materials fit both Langmuir Freundlich isotherms (R(2)>0.94), maximum capacities 111.1 HFeO, 91.74 HZrO 74.07 HCuO. effect competing ions such as sulfate reduced these 18.52 HFeO 18.97 HZrO. Despite this decrease, capable reducing in real wastewater matrix 83%, able reduce it 86%, suggesting that have potential application at full scale.
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