Phosphorus removal by a synthetic iron oxide–gypsum compound

Bastin, Olivier; Janssens, Frédéric; Dufey, Joseph; Peeters, Alain

doi:10.1016/s0925-8574(98)00077-9

Cited by 56 publications

(29 citation statements)

References 25 publications

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“…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

384

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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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

384

155

View full text Add to dashboard Cite

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“…Compared with chemical precipitation, adsorption does not produce large volumes of chemical sludge. Various types of phosphorus adsorbents made from zeolites [46], lanthanum and yttrium compounds [47,48], aluminum compounds [49, 50,51,52,53], zero-valent iron [54], amine-functionalize, Pr(OH)3 [55], magnesium amorphous calcium carbonate [56], zirconium compounds [57,58], and iron(III) oxide compounds [12,30,31,38,40,51,59,60,61] were studied.…”

mentioning

confidence: 99%

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

Markeb

Alonso

Dorado

et al. 2016

Environmental Technology

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Highlights• Immobilization of magnetite nanoparticles on cationic polymer was synthesized.• Phosphate removal using magnetite based nanocomposites was tested.• Adsorption isotherms of phosphate at two pH; 5 and 7 were performed.• Different isotherms models were applied for experimental data fitting.• Regeneration and reusability of the magnetite based nanocomposites were carried out. Graphical Abstract 2 AbstractA novel nanocomposite based on magnetite nanoparticles (Fe3O4-NPs) immobilized on the surface of the cationic exchange polymer, C100, using a modification of the coprecipitation method was developed to obtain magnetic nanocomposites (NCs) for phosphate removal and recovery from water. High resolution TEM-EDS, SEM, XRD, and ICP-OES were used to characterize the NCs. The continuous adsorption process by the so-called breakthrough curves was used to determine the adsorption capacity of the Fe3O4 based NC. The adsorption 3 capacity conditions were studied under different conditions (pH, phosphate concentration and concentration of NPs). The optimum concentration of iron in the NC for phosphate removal was 23.59 mgFe/gNC. The sorption isotherms of this material were performed at pHs 5 and 7.Taking into account the real application of this novel material in real water, the experiments were performed at pH 7, achieving an adsorption capacity higher than 4.9 mgPO4-P/gNC.Moreover, Freundlich, Langmuir and a combination of them fit the experimental data and were used for interpreting the influence of pH on the sorption and the adsorption mechanism for this novel material. Furthermore, regeneration and reusability of the nanocomposite were tested obtaining 97.5 % recovery of phosphate for the first cycle and at least 7 cycles of adsorptiondesorption were carried out with more than 40% of recovery. Thus, this work described a novel magnetic nanoadsorbent with promoting properties for phosphate recovery in wastewater.

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“…On the other hand, kinetic study conducted with artifi cial P solution does not represent the condition of real surface water. Organic matter, inorganic anions and heavy metals may disturb and decrease the sorption process effi ciency (Bastin et al 1999).…”

Section: Resultsmentioning

confidence: 99%

Assessment of sorption properties and kinetic reaction of phosphorus reactive material to limit diffuse pollution

Bus¹

2017

Annals of Warsaw University of Life Sciences – SGGW. Land Reclamation

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Assessment of sorption properties and kinetic reaction of phosphorus reactive material to limit diffuse pollution. Polonite ® is an effective reactive material (manufactured from opoka rock) for removing phosphorus from aqueous solutions. In conducted experiments, Polonite ® of grain size of 2-5 mm was used as a potential reactive material which can be used as a fi lter fulfi llment to reduce phosphorus diffuse pollution from agriculture areas. Kinetic and equilibrium studies (performed as a batch experiment) were carried out as a function of time to evaluate the sorption properties of the material. The obtained results show that Polonite ® effectively removes such contamination. All tested concentrations (0.998, 5.213, 10.965 mg P-PO 4 ·L -1 ) are characterized by a better fi t to pseudo-second kinetic order. The Langmuir isotherm the best refl ects the mechanism of adsorption process in case of Polonite ® and based on the isotherm, calculated maximum adsorption capacity equals 96.58 mg P-PO 4 ·g -1 .

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Phosphorus removal by a synthetic iron oxide–gypsum compound

Cited by 56 publications

References 25 publications

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

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

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

Assessment of sorption properties and kinetic reaction of phosphorus reactive material to limit diffuse pollution

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