Ammonium removal from solution using ion exchange on to MesoLite, an equilibrium study

Thornton, Arthur; Pearce, P.; Parsons, Simon A.

doi:10.1016/j.jhazmat.2007.01.111

Cited by 123 publications

(95 citation statements)

References 30 publications

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“…Different results about the suitable adsorption isotherm for various zeolites were also obtained in previous studies [3,5,[16][17][18]. The equilibrium patterns of ammonium on natural Turkish clinoptilolite, MesoLite and rice husk ash-synthesized zeolite Y fit well with the Langmuir isotherm [5,16,17].…”

Section: Freundlich Isothermmentioning

confidence: 61%

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Ammonium removal from aqueous solution by zeolites synthesized from low-calcium and high-calcium fly ashes

Zhang

et al. 2011

Desalination

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Keywords:Low-calcium fly ash High-calcium fly ash Synthesized zeolite Ammonium removal Select criteria of raw fly ash In this study, zeolites are synthesized from low-calcium (LC-Z) and high-calcium (HC-Z) fly ashes, respectively. The changes of mineralogy, morphology, cation exchange capacity (CEC) and specific surface area (SSA) are investigated during the synthesis process. The equilibrium uptake of ammonium on the two synthesized zeolites is compared. The main crystals of LC-Z and HC-Z are identified as faujasite and gismondine, respectively. The CEC and SSA increase significantly following the conversion process. The kinetic studies showed that the adsorption process of ammonium on both LC-Z and HC-Z follows Ho's pseudosecond-order model. Langmuir model agrees better with the equilibrium data for LC-Z, while Freundlich model gives the better fit for HC-Z. The obtained maximum ammonium uptake capacities are 23.8 mg/g for LC-Z and 3.17 mg/g for HC-Z in the synthetic solution. LC-Z also exhibits much better performance in ammonium uptake in effluent from a sewage treatment plant than HC-Z. These results indicate that LC-Z is a promising material for ammonium removal whereas HC-Z is not. The Ca 2+ leaching and the lower zeolite content in HC-Z account for its lower uptake capacity. Thus, the low-calcium fly ash should be chosen preferentially as the raw material of the zeolite synthesis for ammonium removal.

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Section: Freundlich Isothermmentioning

confidence: 61%

“…The equilibrium patterns of ammonium on natural Turkish clinoptilolite, MesoLite and rice husk ash-synthesized zeolite Y fit well with the Langmuir isotherm [5,16,17]. However, the Freundlich model was better than Langmuir to represent equilibrium data of ammonium exchange by clinoptilolite and microwave-treated zeolite [3,18].…”

Section: Freundlich Isothermmentioning

confidence: 73%

Ammonium removal from aqueous solution by zeolites synthesized from low-calcium and high-calcium fly ashes

Zhang

et al. 2011

Desalination

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“…This relatively high adsorption capacity shows the strong electrostatic force of attraction between the ammonium molecules and the biosorbent bending-sites [30]. Furthermore, in order to situate the raw pinecone powder among the raw mineral adsorbents used to remove ammonium ions from aqueous solutions, a comparison based on Langmuir saturation capacity, Qm, has been made and indicated that the sawdust (0.165 mg/g) was not more efficient than soils (0.28, 0.9 mg/g) [31]; sawdust (1.7 mg/g) [5]; sepiolite (1.47 mg/g) [32] and some zeolites (0.9 mg/g) [21] (1.27 mg/g) [33], and could be considered as a promising material to remove ammonium even when compared with some efficient zeolites as Natural Chinese clinoptilolite (2.02 mg/g) [33], Chabazite (2.94 mg/g) [34]. It should be noted that our study used raw have a lower surface area.…”

Section: Freundlich Isothermmentioning

confidence: 99%

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Demirak¹,

Keskin²,

Şahin³

et al. 2015

Mugla Journal of Science and Technology

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Pine cone, a popular agricultural waste, was investigated as a novel ammonium biosorbent in its raw and sodium hydroxide modified form. Surface modification of pine cone powder were carried out using sodium hydroxide solution of concentarions (0,05 and 0,1mg/L) was described by a pseudo-second-order model predicting a chemisorption process. In addition, the equilibrium data were well characterized by the Langmuir isotherm model that confirmed the mono-layer coverage. The surface properties of raw pine cone powder and its sodium hydroxide modified form were analyzed by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) and powder X-ray diffraction (XRD). The chemical composition of pine cone powder before and after biosorption of ammonium is discussed in relation to the XRD and SEM-EDS results. The results showed that the surface of pine cone powder samples is modified by sodium hydroxide solution and the chemical composition of pine cone powder samples is changed after biosorption of ammonium. This from presents an interesting option for tertiary wastewater treatment (as a possible non-conventional biosorbent for the removal of ammonium

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“…concentration diminishes, equilibrium shifts toward the formation of ammonia gas, and these conditions become increasingly less congenial (Emmerson et al 1981;Thornton et al 2007). As the initial pH of NH 4…”

Section: Effect Of Phmentioning

confidence: 99%

Biosorption of ammoniacal nitrogen from aqueous solutions with low-cost biomaterials: kinetics and optimization of contact time

Mansuri

Mody

Basha

2013

Int. J. Environ. Sci. Technol.

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The biosorption of ammoniacal nitrogen (N-NH 4? ) from aqueous solutions by dead biomass of brown seaweed Cystoseira indica and Jatropha oil cake (JOC), which is generated in the process of biodiesel recovery from its seeds, was studied under diverse experimental conditions. The N-NH 4? biosorption was strictly pH dependent, and maximum uptake capacity of C. indica (15.21 mg/g) and JOC (13.59 mg/g) was observed at initial pH 7 and 3, respectively. For each biosorbent-N-NH 4 ? system, kinetic models were applied to the experimental data to examine the mechanisms of sorption and potential rate-controlling steps. The generalized rate model and pseudo-second-order kinetic models described the biosorption kinetics accurately, and the sorption process was found to be controlled by pore and surface diffusion for these biosorbents. Results of four-stage batch biosorber design analysis revealed that the required time for the 99 % efficiency removal of 40 mg/L N-NH 4? from 500 L of aqueous solution were 76 and 96 min for C. indica and JOC, respectively. The Fourier transform infrared spectroscopy analysis before and after biosorption of ammonium onto C. indica and JOC revealed involvement of carboxylic and hydroxyl functional groups.

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Ammonium removal from solution using ion exchange on to MesoLite, an equilibrium study

Cited by 123 publications

References 30 publications

Ammonium removal from aqueous solution by zeolites synthesized from low-calcium and high-calcium fly ashes

Ammonium removal from aqueous solution by zeolites synthesized from low-calcium and high-calcium fly ashes

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Biosorption of ammoniacal nitrogen from aqueous solutions with low-cost biomaterials: kinetics and optimization of contact time

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