Adsorption of Pb, Cd, Cu, Zn, and Ni to titanium dioxide nanoparticles: effect of particle size, solid concentration, and exhaustion

Engates, Karen E.; Shipley, Heather J.

doi:10.1007/s11356-010-0382-3

Cited by 309 publications

(84 citation statements)

References 22 publications

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“…Adsorption is the most preferred method for removal of heavy metals from aqueous solutions due to its simplicity and its high A. T. Sdiri (&) Á T. Higashi Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8572, Japan e-mail: alisdiri@yahoo.fr effectiveness (Sdiri et al 2011(Sdiri et al , 2012a. In this regards, multiple researchers studied the effectiveness of various type of clay in removing heavy metals from aqueous solutions including kaolinite (Sari et al 2007;Schaller et al 2009), bentonite (Ulmanu et al 2003;Kaya and Hakan Ö ren 2005;Eren et al 2009), illite (Ozdes et al 2011), sepiolite (Guerra et al 2010), montmorillonite (Lin and Juang 2002), and other adsorbents (Al-Degs et al 2006;Engates and Shipley 2011). Many other studies have been undertaken to evaluate the adsorptive capacity of various bioadsorbents in the removal of inorganic pollutants (Ahmad et al 2010;Das 2012;Dubey and Shiwani 2012;Revathi et al 2012;Eren 2010).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of copper and zinc onto natural clay in single and binary systems

Sdiri

Higashi

Jamoussi³

2013

Int. J. Environ. Sci. Technol.

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Calcareous and smectitic clay samples from the Coniacian-Lower Campanian system, Tunisia, were used as adsorbents for the removal of copper and zinc from aqueous solutions in single and binary systems. Calcareous clay sample was treated with acetic acid to obtain carbonate-free sample that was also used for metals removal. The adsorption of metal ions onto natural clay was tested in a batch method by mixing 1 g/L of each sample with a metal ion solution of zinc (300 lmol/L) and/or copper 600 lmol/L under the operating pH of 6, and agitation speed of 200 rpm within the equilibrium time of 60 min at 25°C for single and binary systems. Our results showed that natural clay samples were mainly composed of silica, alumina, iron, and magnesium oxides. Adsorption data showed that the studied clay samples removed substantial amounts of heavy metals in single and mixed systems. Initial solution pH and carbonates contents enhanced the removal capacities of the studied clay samples, confirming their strong influencing effects. Thermodynamic parameters indicated an endothermic adsorption for metals removal by calcareous clay, but exothermic process for the smectitic sample. These results suggest that the Late Cretaceous clays, Tunisia, can be effectively used as natural adsorbents for the removal of toxic heavy metals in aqueous systems.

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Section: Introductionmentioning

confidence: 99%

Adsorption of copper and zinc onto natural clay in single and binary systems

Sdiri

Higashi

Jamoussi³

2013

Int. J. Environ. Sci. Technol.

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“…The results confirmed that the process conditions such as pH, the amount of clinoptilolite and the amount of nickel in the initial solution, have a large effect on the metal removal efficiency. Engates and others (Engates and Shipley 2011) performed studies concerning adsorption of nickel(II), cadmium(II) and lead(II) ions onto TiO 2 nanoparticles. The results confirmed a significant adsorption capacity of titanium dioxide nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Ni(II) from model solutions using co-precipitated inorganic oxides

et al. 2013

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The aim of this work was to obtain an inorganic oxide system containing silica and magnesium oxide, and characterized by specific physicochemical properties, in particular well-defined adsorption parameters. The preparation process was carried out according to a co-precipitation method using solutions of sodium silicate and selected inorganic magnesium salt. The oxide system obtained (MgOÁSiO 2 ) was used as a support (adsorbent) of nickel(II) ions, whose precursors were model solutions of nitrates. The effectiveness of the adsorption process was evaluated using many different analytical techniques, including atomic absorption spectroscopy, energy dispersive X-ray spectroscopy and equivalent point titration. Moreover the stability of adsorbent/adsorbate bonding was estimated. The oxide systems-adsorbents-used in the process were also analyzed according to their physicochemical properties, especially changes in adsorption parameters. The last part of the study involved evaluation of the kinetics of the adsorption process depending on time and the pH of the reaction system.

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“…In addition, these adsorbents have been used on a large scale to improve the capacity of adsorption of compounds with specific functional groups [11]. Nanoscale metal oxides have the potential to save water treatment costs and given their size and high absorption efficiency, they can improve the efficiency of technologies [12,13].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

Mohammadi

Bazrafshan

Noroozifar

et al. 2017

Journal of Chemistry

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Removal of benzene and toluene, as the major pollutants of water resources, has attracted researchers' attention, given the risk they pose to human health. In the present study, the potential of copper oxide nanoparticles (CuO-NPs) in eliminating benzene and toluene from a mixed aqueous solution was evaluated. For this, we performed batch experiments to investigate the effect of solution pH (3-13), dose of CuO-NPs (0.1-0.8 g), contact time (5-120 min), and concentration of benzene and toluene (10-200 mg/l) on sorption efficiency. The maximum removal was observed at neutral pH. By using the Langmuir model, we measured the highest adsorption capacity to be 100.24 mg/g for benzene and 111.31 mg/g for toluene. Under optimal conditions, adsorption efficiency was 98.7% and 92.5% for benzene and toluene, respectively. The sorption data by CuO-NPs well fitted into the following models: Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich model. The experimental information well fitted in the Freundlich for benzene and Langmuir for toluene. Based on the results, adsorption followed pseudo-second-order kinetics with acceptable coefficients. The findings introduced CuO-NPs as efficient compounds in pollutantsadsorption. In fact, they could be used to develop a simple and efficient pollutant removal method from aqueous solutions.

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Adsorption of Pb, Cd, Cu, Zn, and Ni to titanium dioxide nanoparticles: effect of particle size, solid concentration, and exhaustion

Abstract: Comparison of K (d), distribution coefficient, with other literature showed that the nanoparticles were better sorbents than other metal oxide nanoparticles and a commercial activated carbon.

Cited by 309 publications

References 22 publications

Adsorption of copper and zinc onto natural clay in single and binary systems

Adsorption of copper and zinc onto natural clay in single and binary systems

Adsorption of Ni(II) from model solutions using co-precipitated inorganic oxides

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

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