Study on the performance of metakaolin based geopolymer for Mn(II) and Co(II) removal

Kara, İlknur; Tunc, Dilek; Sayin, Fatih; Akar, Sibel Tunali

doi:10.1016/j.clay.2018.04.027

Cited by 114 publications

(56 citation statements)

References 36 publications

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“…The effects of temperature on the Mn(II) adsorption capacities of the adsorbents were investigated from 5 to 50 • C. For example, the adsorption capacities of the metakaolin-based geopolymer were increased from 30.06 to 32.94 mg/g as the temperature rose from 10 to 50 • C. The adsorption process was endothermic and spontaneous. The increasing values of Gibbs free energy of adsorption (∆G • ), with an increase in the temperature, demonstrated that Mn(II) adsorption was favorable at higher temperatures [52]. Similar results have been found in Mn(II) adsorption with Nigerian kaolinite clay [48], and raw and milled vermiculites [55].…”

Section: Effect Of Mn(ii) Concentration and Temperature On The Adsorpsupporting

confidence: 75%

“…It demonstrated that the Mn 2+ adsorption capacity of Pleurotus ostreatus nanoparticles increased from 41.5 mg/g to 53.0 mg/g as the pH increased from 3.0 to 4.0, but there was limited additional change as the pH increased to pH 7.0. The same phenomenon was observed for a metakaolin based geopolymer [52] and polyvinyl alcohol/chitosan [58]. It can be concluded that Mn(II) adsorption is weak at lower pH values for most adsorbents because the concentration of H + ions is higher at a lower pH.…”

Section: Effect Of Ph On Adsorptionsupporting

confidence: 73%

“…Commonly used adsorbents for Mn removal include activated carbon [46], zeolites [47], kaolinite clay [48], nanoparticles [49,50], polymers [51,52], and a wide range of natural and artificial solids [53,54]. The search for low-cost adsorbents is a major focus of current research efforts, and a variety of natural minerals [15,55], agricultural and industrial wastes [56], and bio-sorbents [57] have been tested.…”

Section: Adsorbentsmentioning

confidence: 99%

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Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

et al. 2019

Water

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Many global mining activities release large amounts of acidic mine drainage with high levels of manganese (Mn) having potentially detrimental effects on the environment. This review provides a comprehensive assessment of the main implications and challenges of Mn(II) removal from mine drainage. We first present the sources of contamination from mineral processing, as well as the adverse effects of Mn on mining ecosystems. Then the comparison of several techniques to remove Mn(II) from wastewater, as well as an assessment of the challenges associated with precipitation, adsorption, and oxidation/filtration are provided. We also critically analyze remediation options with special emphasis on Mn-oxidizing bacteria (MnOB) and microalgae. Recent literature demonstrates that MnOB can efficiently oxidize dissolved Mn(II) to Mn(III, IV) through enzymatic catalysis. Microalgae can also accelerate Mn(II) oxidation through indirect oxidation by increasing solution pH and dissolved oxygen production during its growth. Microbial oxidation and the removal of Mn(II) have been effective in treating artificial wastewater and groundwater under neutral conditions with adequate oxygen. Compared to physicochemical techniques, the bioremediation of manganese mine drainage without the addition of chemical reagents is relatively inexpensive. However, wastewater from manganese mines is acidic and has low-levels of dissolved oxygen, which inhibit the oxidizing ability of MnOB. We propose an alternative treatment for manganese mine drainage that focuses on the synergistic interactions of Mn in wastewater with co-immobilized MnOB/microalgae.

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Section: Effect Of Mn(ii) Concentration and Temperature On The Adsorpsupporting

confidence: 75%

Section: Effect Of Ph On Adsorptionsupporting

confidence: 73%

Section: Adsorbentsmentioning

confidence: 99%

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Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

et al. 2019

Water

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“…Inferably, based on the kinetic parameters, the pseudosecond order model data suggests that the rate limiting step during Pb(II) onto MOS was chemisorption. Thus, chemisorption, which involves electrostatic attraction and chemical bonding between the adsorbate and adsorbent [46], was responsible for the adsorption of Pb(II) on the MOS On the other hand, the second-order rate constant (k 2 ) shows a gradual increases with an increase in the initial Pb(II) concentration.…”

Section: The Pseudo-second Order Modelmentioning

confidence: 99%

THE ADSORPTION KINETICS AND MODELING FOR Pb(II) REMOVAL FROM SYNTHETIC AND REAL WASTEWATER BY MORINGA OLEIFERA SEEDS

Swelam

Sherif

Ibrahim

2018

Al-Azhar Bulletin of Science

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This work demonstrates the potential of Moringa oleifera seeds powder as an adsorbent for the removal of heavy metals from wastewater. The moringa oleifera seeds powder is characterized as an adsorbent for the removal of heavy metals from wastewater using FTIR, XRD, pH pzc , SEM and BET techniques. Several processing parameters such as; contact time, adsorbent dose, initial lead ion concentrations, pH, and temperature are optimized. The equilibrium data for bio-sorption are analyzed by using Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models to define the best correlation for lead ions. Among the four isotherm models, both Temkin and Freundlich models best describe the experimental data for Pb(II).The adsorption of the metal ions, Pb (II) is well defined by the pseudo-second order model (R 2 > 0.99). The interaction of the cationic species with the MOS powder is predominately via chemisorption rather than physisorption. The thermodynamic parameters such as ΔS, ΔH and ΔG are also determined.

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“…Thus, the removal of this element from different environments is of a practical necessity. In aqueous media, cobalt is normally found as cobalt(II) or Co 2+ , and the treatment of solutions containing it, included, as recent literature shows, ion exchange, adsorption, solvent extraction and liquid membranes processing (Ashtari and Pourghahramani, 2018;Bozecka et al, 2018;Devi et al, 2018;Farag et al, 2018;Hayati et al, 2018;Kara et al, 2018;Ma et al, 2018;Omelchuk and Chagnes, 2018;Song et al, 2018;Vafaei et al, 2018;Xavier et al, 2018;Yuan et al, 2018;Zherebtsov et al, 2018;Anirudhan et al, 2019;Rodriguez et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XI: Cobalto(II)/H<sup>+</sup>/Lewatit TP260

Alguacil

2019

REVMETAL

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Este trabajo investiga sobre la eliminación de cobalto(II) presente en medios acuosos mediante la resina de cambio iónico Lewatit TP260. El sistema se estudia bajo distintas condiciones experimentales: velocidad de agitación (300-1400 min-1), temperatura (20-60 ºC), pH del medio acuoso (1-5), dosificacion de la resina (0.07-0.5 g·L-1) y fuerza iónica de la disolución acuosa. El metal se carga en la resina mediante una reacción de intercambio catiónica en un proceso endotérmico y espontáneo. Esta reacción de intercambio se define por un proceso de difusión en la disolución acuosa y el modelo cinético de pseudo-primer orden (20 ºC) y el modelo cinético de pseudo-segundo orden (60 ºC), asimismo los resultados experimentales se ajustan bien a la isoterma de Langmuir. Los resultados experimentales del sistema se han comparado con los obtenidos con otras resinas de intercambio cationico y también con nanotubos de carbono de pared multiple oxidados y sin oxidar. Se estudia la selectividad del sistema Co(II)-Lewatit TP260 con respecto a la presencia de otros cationes (disoluciones binarias Co-metal) en el medio acuoso). El cobalto(II) cargado en la resina se puede fluir con disoluciones ácidas (HCl o H2SO4).

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Study on the performance of metakaolin based geopolymer for Mn(II) and Co(II) removal

Cited by 114 publications

References 36 publications

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

THE ADSORPTION KINETICS AND MODELING FOR Pb(II) REMOVAL FROM SYNTHETIC AND REAL WASTEWATER BY MORINGA OLEIFERA SEEDS

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XI: Cobalto(II)/H<sup>+</sup>/Lewatit TP260

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