Advanced phosphorus removal from membrane filtrates by adsorption on activated aluminium oxide and granulated ferric hydroxide

Genz, Arne; Kornmüller, Anja; Jekel, Martin

doi:10.1016/j.watres.2004.06.006

Cited by 270 publications

(118 citation statements)

References 13 publications

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“…Our SEM/EDX analysis showed an elemental ratio (C/Ca) of 38:1, which demonstrated the occurrence of the complexation between Ca 2+ and HA. Kaneco et al reported that Cu 2+ and Al 3+ enhanced fuvic acid adsorption onto metal oxides [3]. Schulthess and Huang reported that metal/humic complexes exhibited a higher adsorption density on metal oxides than humic substances alone [15].…”

Section: Effects Of Camentioning

confidence: 99%

“…The adsorption of different pollutants (e.g., natural organic matter, phosphate, arsenic, and hydroquinone) onto natural or synthetic manganese oxides has been investigated so far with interfacial reaction mechanisms, including adsorption, surface complex formation, heterogeneous oxidation, and reductive dissolution [1][2][3]. However, previous studies mainly focused on prepared adsorbents.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Ca 2+ changed the dominant reactions during natural organic polyelectrolyte adsorption onto tobermorite [5] and lessened the adverse effect of silicate inhibiting arsenic co-precipitation with ferric chloride [6]. These effects were mainly ascribed by the formation of complexes between Ca 2+ and metal oxides, organics, and inorganics [2,3]. However, previous studies mainly employed * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

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Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide

Liu

Qiang

et al. 2009

Journal of Colloid and Interface Science

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The effects of calcium ions (Ca 2+ ) on the surface characteristics and adsorptive properties of hydrous manganese dioxide (δMnO 2 ), taking arsenic and humic acid as model pollutants, were systematically investigated. The FTIR spectra and SEM/EDX analyses indicate coordination between Ca 2+ and the surface hydroxyls (≡Mn-OH) of δMnO 2 , which leads to an increase of the surface ζ potential. Ca 2+ can facilitate δMnO 2 aggregation, as indicated by the particle size distribution (PSD) and on-line flocculating index (FI). The variation of δMnO 2 surface characteristics that is induced by Ca 2+ enhances the adsorption of humic acid (HA) and arsenic onto δMnO 2 . The adsorption of HA is enhanced more significantly by Ca 2+ than that of arsenic, which is positively related to the coordination strength between Ca 2+ and individual pollutants. The SEM/EDX analysis shows the formation of Ca-HA complexes, which have a higher affinity for δMnO 2 than HA. The bridging effect of Ca 2+ plays a major role in enhancing HA adsorption onto δMnO 2 . Due to different interactions between Ca 2+ and pollutants, the adsorption mechanism is pollutant-dependent in the presence of Ca 2+ .

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Section: Effects Of Camentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide

Liu

Qiang

et al. 2009

Journal of Colloid and Interface Science

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“…Another attractive feature of this technique is that the nutrient-loaded filters can be used in agriculture as phosphate fertilizer and soil conditioner [10]. A large number of materials from natural minerals to synthetic ones have been used as adsorbents to adsorb phosphate from wastewater [11][12][13][14][15]. Recently, the application of low cost and easily available materials for phosphate removal has been widely investigated, such as fly ash [16][17][18], blast furnace slag [19][20][21], iron oxide tailing [22], red mud [23,24], Ca-based adsorbents, and iron-based compounds [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Removal of phosphate from water by a Fe–Mn binary oxide adsorbent

Zhang

Liu

et al. 2009

Journal of Colloid and Interface Science

386

155

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a b s t r a c tPhosphate removal is important in the control of eutrophication of water bodies and adsorption is one of the promising approaches for this purpose. A Fe-Mn binary oxide adsorbent with a Fe/Mn molar ratio of 6:1 for phosphate removal was synthesized by a simultaneous oxidation and coprecipitation process. Laboratory experiments were carried out to investigate adsorption kinetics and equilibrium, in batch mode. The effects of different experimental parameters, namely contact time, initial phosphate concentration, solution pH, and ionic strength on the phosphate adsorption were investigated. The adsorption data were analyzed by both Freundlich and Langmuir isotherm models and the data were well fit by the Freundlich isotherm model. Kinetic data correlated well with the pseudo-second-order kinetic model, suggesting that the adsorption process might be chemical sorption. The maximal adsorption capacity was 36 mg/g at pH 5.6. The phosphate adsorption was highly pH dependent. The effects of anions such as Cl À ; SO 4 2À , and CO 3 2À on phosphate removal were also investigated. The results suggest that the presence of these ions had no significant effect on phosphate removal. The phosphate removal was mainly achieved by the replacement of surface hydroxyl groups by the phosphate species and formation of inner-sphere surface complexes at the water/oxide interface. In addition, the adsorbed phosphate ions can be effectively desorbed by dilute NaOH solutions. This adsorbent, with large adsorption capacity and high selectivity, is therefore a very promising adsorbent for the removal of phosphate ions from aqueous solutions.

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“…The mineral surface is negatively charged at pH above pH zpc and exhibits predominantly an electrostatic attraction toward metal cations, while the mineral shows repulsion for metal cations at pH below its pH zpc . Ferric hydroxide, as opposed to aluminum hydroxide, generally possesses a larger specific surface area (410 vs 230-300 m 2 /g) and lower pH zpc (7.5-8.2 vs 9-11.5) [33,34]. Hence, the Cd bound to ferric hydroxide is probably less bioavailable due to stronger Cd-Fe(OH) 3 bonding strength.…”

Section: Bioaccumulation Ofmentioning

confidence: 99%

Effects of sediment composition on cadmium bioaccumulation in the clam Meretrix meretrix Linnaeus

Xie

et al. 2013

Enviro Toxic and Chemistry

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Abstract-Sediment particulates can be ingested by benthic animals, and the bioavailability of associated metals strongly depends on their speciation in the sediments. Different sedimentary components have distinct physiochemical characteristics and result in different biological responses from animals. Therefore, the bioaccumulation of particle-bound trace metals may be different. In the present study, bioaccumulation of cadmium adsorbed on various (hydr)oxide minerals, that is, ferric hydroxide, aluminum hydroxide, and manganese dioxide, in the clam Meretrix meretrix Linnaeus was studied. The results showed that the accumulation rate of cadmium varied for different mineral-adsorbed cadmium. The bioaccumulation of metal (hydr)oxide-adsorbed cadmium in M. meretrix followed the order Cd-MnO 2 > Cd-Al(OH) 3 > Cd-Fe(OH) 3 . The type of mineral determines both the assimilation efficiency and ingestion rate, and consequently controls the bioaccumulation of adsorbed cadmium. Environ. Toxicol. Chem. 2013;32:841-847. # 2013 SETAC

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Advanced phosphorus removal from membrane filtrates by adsorption on activated aluminium oxide and granulated ferric hydroxide

Cited by 270 publications

References 13 publications

Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide

Effects of calcium ions on surface characteristics and adsorptive properties of hydrous manganese dioxide

Removal of phosphate from water by a Fe–Mn binary oxide adsorbent

Effects of sediment composition on cadmium bioaccumulation in the clam Meretrix meretrix Linnaeus

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