Adsorption kinetics of phosphate and arsenate on goethite. A comparative study

Luengo, Carina Vanesa; Brigante, Maximiliano Eduardo; Avena, Marcelo Javier

doi:10.1016/j.jcis.2007.03.027

Cited by 108 publications

(71 citation statements)

References 27 publications

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“…The use of ATR-FTIR to monitor reaction kinetics has shown very good agreement with traditional batch approaches; for example, for phosphate sorption to goethite (Luengo et al, 2006(Luengo et al, , 2007. However, it was not until recent years that very rapid reactions could be studied using FTIR.…”

Section: Inorganic Molecule Interactions With Mineral Surfacesmentioning

confidence: 99%

Soil Chemical Insights Provided through Vibrational Spectroscopy

Parikh

Goyne

Margenot

et al. 2014

Advances in Agronomy

202

163

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Section: Inorganic Molecule Interactions With Mineral Surfacesmentioning

confidence: 99%

Soil Chemical Insights Provided through Vibrational Spectroscopy

Parikh

Goyne

Margenot

et al. 2014

Advances in Agronomy

202

163

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“…They can also serve as high capacity -selectivity and recyclable ligands for toxic metal ions, radionuclides, organic and inorganic solutes [29]. Therefore water treatment based on the adsorption of contaminants using nanomaterials, such as cerium oxide or iron oxide-based nanoparticles, is relatively useful and cost effective method for water contaminants [30,31,32,33,34,35,36,37,38,39,40,41,42,43] and also for phosphate removal [30,31,33,34,35,36,38,39,40,41,43]. Adsorption is generally used to remove organic [44] and inorganic contaminants such as heavy metals [45] from water and wastewater treatment.…”

Section: Introductionmentioning

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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“…They have been widely used in the extraction of heavy metals from natural [6] and industrial sources [7], which has generated a great number of studies about mechanisms of surface interactions [8][9][10][11][12]. These minerals are common in environments with high availability of metal sulphides exposed to oxidizing conditions, as in acid sulphate soils, in the oxidation zone of mine tailings, or ore deposits [13,14].…”

Section: Introductionmentioning

confidence: 99%

Liberation of Adsorbed and Co-Precipitated Arsenic from Jarosite, Schwertmannite, Ferrihydrite, and Goethite in Seawater

2014

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Sea level rise is able to change the geochemical conditions in coastal systems. In these environments, transport of contaminants can be controlled by the stability and adsorption capacity of iron oxides. The behavior of adsorbed and co-precipitated arsenic in jarosite, schwertmannite, ferrihydrite, and goethite in sea water (common secondary minerals in coastal tailings) was investigated. The aim of the investigation was to establish As retention and transport under a marine flood scenario, which may occur due to climate change. Natural and synthetic minerals with co-precipitated and adsorbed As were contacted with seawater for 25 days. During this period As, Fe, Cl, SO 4 , and pH levels were constantly measured. The larger retention capability of samples with co-precipitated As, in relation with adsorbed As samples, reflects the different kinetics between diffusion, dissolution, and surface exchange processes. Ferrihydrite and schwertmannite showed good results in retaining arsenic, although schwertmannite holding capacity was enhanced due its buffering capacity, which prevented reductive dissolution throughout the experiment. Arsenic desorption from goethite could be understood in terms of ion exchange between oxides and electrolytes, due to the charge difference generated by a low point-of-zero-charge and the change in stability of surface complexes between synthesis conditions and natural media. OPEN ACCESSMinerals 2014, 4 604

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Adsorption kinetics of phosphate and arsenate on goethite. A comparative study

Cited by 108 publications

References 27 publications

Soil Chemical Insights Provided through Vibrational Spectroscopy

Soil Chemical Insights Provided through Vibrational Spectroscopy

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

Liberation of Adsorbed and Co-Precipitated Arsenic from Jarosite, Schwertmannite, Ferrihydrite, and Goethite in Seawater

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