Heavy metal cation retention by unconventional sorbents (red muds and fly ashes)

Apak, Reşat; Tütem, Esma; Hügül, Mehmet; Hızal, Jülide

doi:10.1016/s0043-1354(97)00204-2

Cited by 295 publications

(162 citation statements)

References 21 publications

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“…It is generally acknowledged that materials that contain high content of metal oxides can reduce the mobility of heavy metals, phosphorus and arsenic by two ways: adsorption and precipitation (Apak et al 1998;Enzo et al 2002;Daumer et al 2010;Li et al 2009). Generally, adsorption is accomplished by the surface complexation between pollutant and the hydroxyl groups on the oxide surface (Eqs.…”

Section: Discussion Of the Immobilization Mechanismmentioning

confidence: 99%

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

2013

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Red mud (RM), the solid waste of alumina industry, is high in silicon, calcium, aluminum and iron oxides. In this study, RM was activated by heat treatment at different temperatures and characterized with BET nitrogen gas sorption, scanning electron microscopy analysis and X-ray diffraction analysis. Immobilization of phosphorus, copper, zinc, and arsenic in swine manure by activated RM was studied as a function of RM dosage, pH and time. The immobilization efficiency of phosphorus, copper, zinc and arsenic increased with the increase in RM dosage, reaching 77, 39, 42, and 78 % when the proportion of RM to swine manure was 20 %. The pH of the solution had a significant impact on the immobilization and it was found that the efficiency increased with the increase in pH. During the 24-h immobilization, the efficiency increased with time and achieved equilibrium after 12 h. Chemical variations of phosphorus, copper, zinc, and arsenic during the immobilization process were investigated with sequential chemical extraction method and the results showed that the contents of non-labile fractions of phosphorus, heavy metals and arsenic increased obviously, whereas the contents of labile fractions decreased.

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Section: Discussion Of the Immobilization Mechanismmentioning

confidence: 99%

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

2013

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“…This model is most suitable for low concentrations of contaminants but higher concentrations such as those used in this study require the use of the other two models [13].…”

Section: Adsorption Of Copper By Two Different Size Gravelsmentioning

confidence: 99%

Adsorption of Copper by Two Different Size Gravels

Abdulfatah¹,

Salihi²,

Anwar³

2014

JOCET

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“…Although the basic assumptions for these models were not fulfilled due to the heterogeneity of the sorbents surface, they were quite successful in predicting the experimental saturation capacities of the sorbents [20][21][22][23]. The Langmuir model is probably the best known and most widely applied sorption isotherm.…”

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

Aqueous-Phase Sorption Behaviors of Cs+, Co2+, Sr2+ and Cd2+ions on some Composite Ion Exchangers

El-Naggar¹,

Ibrahim²,

El-Kady³

2012

ACES

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A two new hybrid "organic-inorganic" composite ion exchangers (SAM and FAM), was synthesized by the combination of inorganic ion exchanger tin (IV) silicate and tin (IV) antimonate respectively with organic polymer polyacrylamide (PAm). The sorption isotherms for Cs + , Co 2+ , Sr 2+ and Cd 2+ ions on composite ion exchanger were investigated in the range (0.0005 -0.01 M) at different reaction temperature (30˚C, 45˚C and 60˚C ± 1˚C). The sorption data were subjected to different sorption isotherms and the results verified that Langmuir isotherm is the best model to be applied, and the monolayer sorption capacity were calculated and was found to increase as the reaction temperature increases.

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Heavy metal cation retention by unconventional sorbents (red muds and fly ashes)

Cited by 295 publications

References 21 publications

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

Adsorption of Copper by Two Different Size Gravels

Aqueous-Phase Sorption Behaviors of Cs<sup>+</sup>, Co<sup>2+</sup>, Sr<sup>2+</sup> and Cd<sup>2+</sup>ions on some Composite Ion Exchangers

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Heavy metal cation retention by unconventional sorbents (red muds and fly ashes)

Cited by 295 publications

References 21 publications

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

Adsorption of Copper by Two Different Size Gravels

Aqueous-Phase Sorption Behaviors of Cs&lt;sup&gt;+&lt;/sup&gt;, Co&lt;sup&gt;2+&lt;/sup&gt;, Sr&lt;sup&gt;2+&lt;/sup&gt; and Cd&lt;sup&gt;2+&lt;/sup&gt;ions on some Composite Ion Exchangers

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Aqueous-Phase Sorption Behaviors of Cs<sup>+</sup>, Co<sup>2+</sup>, Sr<sup>2+</sup> and Cd<sup>2+</sup>ions on some Composite Ion Exchangers