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- W2080094187 abstract "Abstract With a view to simultaneously conserving the environment and an important natural resource, we assessed the feasibility of using red mud (RM), a residue from bauxite refining, for wastewater treatment. Moistened mixtures of RM and 8% (w/w) CaSO 4 form aggregates which are stable in aqueous media. Batch experiments examining adsorption of phosphorus (P) by these aggregates for contact times of 3, 6, 24 and 48 h indicated that adsorption occurred by both fast and slow reactions. Likewise, comparison of experimental breakthrough curves (BTCs) for P retention on a column of RM aggregates (residence time 3 h) with MCMFIT-simulated BTCs indicated that fast and slow adsorption reactions were occurring. Actual P retention was predicted, taking into account both kinetics of fast and slow adsorption reactions. The RM aggregates had maximum adsorption capacities (evaluated from fits (0.90 2 2+ , Zn 2+ , Ni 2+ and Cd 2+ of 19.72, 12.59, 10.95 and 10.57 mg g −1 , respectively. In continuous adsorption experiments in which secondary effluent from an urban sewage treatment plant was percolated through RM aggregates packed into columns, purification efficiencies for P, Ni 2+ , Cu 2+ and Zn 2+ were 100, 100, 68 and 56% respectively. Aggregated RM is suitable for treatment of wastewaters, in particular those whose principal contaminants are P or heavy metals." @default.
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- W2080094187 date "1998-04-01" @default.
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- W2080094187 title "Adsorbent properties of red mud and its use for wastewater treatment" @default.
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- W2080094187 doi "https://doi.org/10.1016/s0043-1354(97)00326-6" @default.
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