Batch-wise nitrate removal from water on a surfactant-modified zeolite

Schick, Joachim; Caullet, Philippe; Paillaud, Jean‐Louis; Patarin, Joël; Mangold-Callarec, Claire

doi:10.1016/j.micromeso.2010.03.018

Cited by 81 publications

(40 citation statements)

References 25 publications

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“…Additional information (nature of impurities, chemical composition, CEC and ECEC values) can be found in Ref. [35]. In particular, the CEC and ECEC values are close to 1,850 and 150 meq/Kg respectively.…”

Section: Characterization Of the Used Adsorbent Samplesmentioning

confidence: 82%

“…This is significantly lower to the value expected from the ECEC value, i.e.150 meq/Kg. The observed discrepancy was previously interpreted in terms of a restricted accessibility of the large HDTMA cations to the clinoptilolite crystals surface, hindering thus the formation of a continuous surfactant bilayer [35].…”

Section: Characterization Of the Used Adsorbent Samplesmentioning

confidence: 90%

“…The details relative to the methods of X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence spectroscopy (XRF), Zeta potential measurement, Cationic Exchange Capacity (CEC) and External Cationic Exchange Capacity (ECEC) measurements (the latter are only performed on the raw clinoptilolite sample, see hereafter) are given in our previous paper [35]. The Si/Al framework molar ratio of the FAU-type zeolite (Na-X type) was determined from the corresponding XRD pattern using the following empirical relations [37]:…”

Section: Characterization Methodsmentioning

confidence: 99%

“…Higher phosphate concentrations (up to 29 mmol/L) were only used in specific experiments performed in order to determine the anionic adsorption capacity q m of the SMZ sample. The questions of the regeneration of the SMZ and of the removal of the leached surfactant from the effluents are not discussed in this paper as they were examined in previous studies relative to the nitrate sorption on SMZ in B or C experiments [35,36].…”

Section: -mentioning

confidence: 99%

“…The SMZ sample was prepared by treatment of the raw clinoptilolite sample by a hexadecyltrimethylammonium solution according to the procedure related in detail in Ref. [35] and is characterized by a q m value close to 90 meq/Kg. This is significantly lower to the value expected from the ECEC value, i.e.150 meq/Kg.…”

Section: Characterization Of the Used Adsorbent Samplesmentioning

confidence: 99%

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Phosphate uptake from water on a Surfactant-Modified Zeolite and Ca-zeolites

et al. 2011

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The phosphate adsorption kinetics are determined in batch-wise (noted B) and fixed-bed column (noted C) experiments on a Surfactant-Modified Zeolite (SMZ) and various Ca-zeolites. The influence of phosphate concentration (0.08 or 0.8 mmol/L), presence of NO 3 -, HCO 3 -, SO 4 2-and Cl -competing anions (individual concentration = 0.8 meq/L) and flow rate Q (1-30 mL/min) is studied. Preliminary experiments lead to the selection of the most efficient Ca-LTA and SMZ samples for the subsequent studies. In B experiments, the nature of the used system does not influence the equilibrium removal rate R (&80%) but affects the adsorption kinetics. The equilibrium times are shorter on SMZ than on Ca-LTA, increasing with the phosphate concentration and the presence of competing anions, respectively in the *0.5-6 or *3-24 h ranges. In C experiments, the phosphate uptake performances on SMZ are higher than in the corresponding B experiments, with in particular higher final q/q m values. The deterioration of the performances on SMZ in presence of competing anions or with increase of Q is due to the effect of the slow phosphate ion-exchange kinetics and the short used contact time. For similar reasons, sorption on Ca-LTA is lower than on SMZ. For instance, with a 0.8 mmol/L phosphate concentration and a 10 mL/min flow rate, the time-decreasing R values become close to 50 and 10% after filtration of 10 bed-volumes respectively in presence of SMZ and Ca-LTA. Globally, SMZ is clearly more efficient than Ca-LTA, being furthermore a versatile and easily regenerable material.

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Section: Characterization Of the Used Adsorbent Samplesmentioning

confidence: 82%

Section: Characterization Of the Used Adsorbent Samplesmentioning

confidence: 90%

Section: Characterization Methodsmentioning

confidence: 99%

Section: -mentioning

confidence: 99%

Section: Characterization Of the Used Adsorbent Samplesmentioning

confidence: 99%

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Phosphate uptake from water on a Surfactant-Modified Zeolite and Ca-zeolites

et al. 2011

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A Review on the Removal of Nitrate from Water by Adsorption on Organic‐Inorganic Hybrid Biocomposites

Golie¹,

Ahmad²,

Upadhyayula³

2017

Advanced Materials for Wastewater Treatment

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Aqueous nitrate removal by D417 resin: thermodynamic, kinetic and response surface methodology studies

Wang

et al. 2011

Asia-Pacific J Chem Eng

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In this study, D417 resin was characterized using scanning electron microscopy, Fourier transform infrared spectrometry and thermogravimetric analysis (TGA). Batchwise experiments were carried out to evaluate the thermodynamic and kinetic behaviors of the aqueous nitrate adsorption onto D417 resin. Response surface methodology (RSM) with Box–Behnken design (BBD) was employed to analyze the competition disturbance and matrix effects in terms of pH, organic matter concentration, contact time (CT) and salinity. Test results revealed that the resin was composed of the quaternary ammonium functional group and exhibited a considerable adsorption capacity of 23.46 to 22.81 mg·g−1 at the temperature ranging from 293.15 to 313.15 K. Mean free energy of adsorption calculated from the Dubinin–Radushkevich model showed that the adsorption was realized through ion‐exchange pathway. Gibbs free energy change, enthalpy change and entropy change illustrated that the aqueous nitrate sorption was feasible and spontaneous. It was also found that the pseudo‐second‐order model could well describe the adsorption kinetics, and the intraparticle diffusion was the main rate‐limiting step. RSM with BBD showed that CT and salinity had significant effects on aqueous nitrate adsorption, whereas the impacts of pH and dissolved organic matter were negligible. © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.

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Batch-wise nitrate removal from water on a surfactant-modified zeolite

Cited by 81 publications

References 25 publications

Phosphate uptake from water on a Surfactant-Modified Zeolite and Ca-zeolites

Phosphate uptake from water on a Surfactant-Modified Zeolite and Ca-zeolites

A Review on the Removal of Nitrate from Water by Adsorption on Organic‐Inorganic Hybrid Biocomposites

Aqueous nitrate removal by D417 resin: thermodynamic, kinetic and response surface methodology studies

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