Insights into efficient removal and mechanism for ammonium from aqueous solution on tricalcium aluminate

Zhang, Ping; Zeng, Xianzhe; Wen, Xiaohan; Yang, Chen-Kai; Ouyang, Sida; Li, Peng; Gu, Zi; Wu, Daishe; Frost, Ray L.

doi:10.1016/j.cej.2019.02.010

Cited by 27 publications

(10 citation statements)

References 54 publications

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“…Even if with the increase of the adsorbent dosage, the amount of retained metal ions increases, reporting to high values determines the obtaining of lower values for the adsorption capacity. Similar variations have been also reported in many studies from literature [22,24,27,28]. Therefore, an adsorbent dosage of 4.0 g/L was considered optimal for the removal of Pb(II) and Hg(II) ions from aqueous solution by adsorption on clay material, and this value was used in all further experiments.…”

Section: Effect Of Adsorbent Dosagesupporting

confidence: 67%

“…The initial solution pH is one of the most important parameters that affect the efficiency of the adsorption processes on clay materials [21,22], mainly because it is responsible for both the speciation form of metal ion in aqueous solution, and the dissociation of functional groups from adsorbent surface. This is the reason why in this study, the adsorptive performances of clay materials were examined using toxic heavy metal ions solutions (Pb(II) and Hg(II)) with different initial pH values, ranging from 2.0 to 7.0, and the obtained experimental results are presented in Figure 1.…”

Section: Effect Of Initial Solution Phmentioning

confidence: 99%

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Efficient Removal of Toxic mMetal Ions (Pb(II) and Hg(II) Ions in Single Component Systems by Adsorption on Romanian Clay Material

Azamfire¹,

Bulgariu²,

Bulgariu³

2020

Rev. Chim.

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In this study, a local natural clay material was used for the efficient removal of Pb(II)ions and Hg(II) ions from aqueous media, in batch system. The adsorptive potential of clay material was testes at different initial solution pH, adsorbent dosage, contact time and initial heavy metal ions concentration and room temperature (20  2C). The highest adsorption efficiency of clay material was found at initial pH of 7.0 in case of Pb(II) ions, and 2.0 in case of Hg(II) ions, while the adsorbent dosage had the same value (4 g/L) for both metal ions. The adsorption equilibrium is very fast and was reach within 10 min. The modelling of experimental data showed that the adsorption processes followed the Freundlich isotherm model and pseudo-second order kinetic model. Detailed analysis of the experimental data indicate that the retention of Pb(II) and Hg(II) ions from aqueous solution on clay materials involves two processes, one of adsorption and the other of precipitation, whose succession depends on the speciation form of the metal ion in aqueous solution. However, the high adsorption capacity and short contact time are important characteristics which suggest the potential use of this clay material in environmental remediation processes.

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Section: Effect Of Adsorbent Dosagesupporting

confidence: 67%

Section: Effect Of Initial Solution Phmentioning

confidence: 99%

Efficient Removal of Toxic mMetal Ions (Pb(II) and Hg(II) Ions in Single Component Systems by Adsorption on Romanian Clay Material

Azamfire¹,

Bulgariu²,

Bulgariu³

2020

Rev. Chim.

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“…In addition, the ZFAs can be used for the effluent from the biochemical unit. For the outflow from the pig farm biochemical unit, when the zeolite dosage was 10 g/L, the effluent ammonia nitrogen concentration was 63.92 mg/L, which is less than the NH 4 + concentration (80 mg/L) in the discharge standard of pollutant for livestock and poultry breeding (GB18596-2001), ensuring that the swine wastewater effluent complies with the relevant standard [6]. As a result, the application of the ZFAs makes the swine wastewater treatment practical and usable.…”

Section: Removal Of Ammonium From Real Swine Wastewatermentioning

confidence: 96%

“…In addition, the adsorption site could be more active at lower temperature [42]. However, increases in the ammonium removal efficiency with increasing temperature have been reported for some other adsorbents [6,29]. Therefore, the effect of temperature on the ammonium adsorption depends on the adsorbents and experimental conditions.…”

Section: Thermodynamicsmentioning

confidence: 99%

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Removal of Ammonium from Swine Wastewater Using Synthesized Zeolite from Fly Ash

Tang

Wang

et al. 2020

Sustainability

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Synthetic zeolites with pretreated fly ash as a raw material were used to remove ammonium from wastewater using a hydrothermal method in this study. Two pretreatment methods of fly ash were used to compare the ammonium removal of zeolites: water-washing and pickling. In addition, the effects of several factors including the time, temperature, pH, adsorbent dosage, coexisting ions and initial concentration were investigated to gain insight into the adsorption rate, behavior and mechanism of synthetic zeolites for ammonium. N2 adsorption/desorption isotherms showed that the synthetic zeolite was a mesoporous material with a higher specific area (13.05 m2/g) than the values for raw fly ash (0.34 m2/g). The X-ray diffraction result suggested that the synthetic products mainly belonged to zeolite P and Y. The adsorption kinetic data fitted well with a pseudo-second-order model. The maximum ammonium adsorption capacity was 32.16 mg/g. The synthetic zeolites were also applied to adsorb the ammonium from real swine wastewater. The ammonium removal efficiencies in raw swine wastewater and effluent from the biochemical unit were 64.34% and 79.61%, respectively, which indicated that the synthetic zeolites have a good application for real ammonium wastewater.

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Porous Ni-Ca-Al-O bi-functional catalyst derived from layered double hydroxide intercalated with citrate anion for sorption-enhanced steam reforming of glycerol

Dang

Yang

Zhou

et al. 2021

Applied Catalysis B: Environmental

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Insights into efficient removal and mechanism for ammonium from aqueous solution on tricalcium aluminate

Cited by 27 publications

References 54 publications

Efficient Removal of Toxic mMetal Ions (Pb(II) and Hg(II) Ions in Single Component Systems by Adsorption on Romanian Clay Material

Efficient Removal of Toxic mMetal Ions (Pb(II) and Hg(II) Ions in Single Component Systems by Adsorption on Romanian Clay Material

Removal of Ammonium from Swine Wastewater Using Synthesized Zeolite from Fly Ash

Porous Ni-Ca-Al-O bi-functional catalyst derived from layered double hydroxide intercalated with citrate anion for sorption-enhanced steam reforming of glycerol

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