Adsorption kinetic of arsenates as water pollutant on iron, manganese and iron–manganese-modified clinoptilolite-rich tuffs

Jiménez-Cedillo, M. J.; Olguín, M. T.; Fall, Cheikh

doi:10.1016/j.jhazmat.2008.07.049

Cited by 73 publications

(38 citation statements)

References 42 publications

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“…To overcome this problem, many solids coated with iron oxides have been used instead. Typical solids coated with iron oxides include zeolite (Jeon et al 2009;Jimenez-Cedillo et al 2009), montmorillonite (Ramesh et al 2007), cement (Kundu and Gupta 2006), activated carbon (Mondal et al 2007), and sand (Benjamin et al 1996;Lai et al 2000).…”

mentioning

confidence: 99%

Adsorption of arsenic(V) by iron-oxide-coated diatomite (IOCD)

Pan¹,

Chiou²,

Lin³

2010

Environ Sci Pollut Res

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This study demonstrated that the granular IOCD was successfully developed and employed to remove the As(V) in aqueous solution. The Freundlich isotherm well fitted the equilibrium adsorption data of As(V) onto IOCD, and both the pseudo-second-order model and the pore diffusion model simulated well the adsorption kinetics. Compared to other iron-oxide-based adsorbents reported in the literatures, the adsorption capacity of IOCD is relatively high and its kinetics is fast.

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mentioning

confidence: 99%

Adsorption of arsenic(V) by iron-oxide-coated diatomite (IOCD)

Pan¹,

Chiou²,

Lin³

2010

Environ Sci Pollut Res

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“…The presence of crystalline aluminum phases (e.g. hydrated aluminum oxide) was not identified in Z-Al samples as it was described by Jimenez-Cedillo about the formation of amorphous oxide species on a modified zeolite surface [14,15,30]. Al(III)) and water molecues which are coordinated in the zeolite framework [31].…”

Section: Materials Characterization Of Hydrated Aluminum Oxide Zeolitesmentioning

confidence: 93%

“…Particles below 200 µm mesh were used for batch experiments and particles between 800 -1200 µm mesh were used for column experiments. Z-N was modified to the aluminum form by using an adaptation of the method reported by Jiménez-Cedillo [14]. Thirty grams of natural zeolite were treated with 250 mL of NaCl (0.1 M) two consecutive times under reflux conditions for 4 hours.…”

Section: Impregnation Of Hydrated Aluminum Oxide Onto a Natural Zeolitementioning

confidence: 99%

“…However, they have been rarely used for phosphate sorption due to the constant negative charge on their surface [12]. In order to improve the ion exchange capacity of natural zeolites for anionic species the incorporation or impregnation of iron and aluminum oxides, are the most widespread and excellent candidates for phosphate removal [13][14][15][16][17][18]. Zeolites exhibit different properties which depend on the geological location and they deserve a detailed characterization [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous phosphate and ammonium removal from aqueous solution by a hydrated aluminum oxide modified natural zeolite

Guaya

Valderrama

Farrán

et al. 2015

Chemical Engineering Journal

263

106

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A natural zeolite (Z-N), rich in clinoptilolite, was modified (Z-Al) by incorporation of hydrated aluminum oxide (HAlO) for the simultaneous phosphate and ammonium removal. The incorporation of surface hydroxyl groups (≅Al-OH) into the zeolite structure, as active groups for phosphate removal, was characterized by acid-base titrations (pHPZC=4.5±0.2). The phosphate sorption increases from 0.6 mg-P/g for Z-N up to 7.0 mg-P/g while only a slight decrease on the ammonium sorption capacity from 33 mg-N/g of Z-N to 30 mg-N/g for Z-Al was observed. The HAlO modified zeolite sorption capacity for both phosphate and ammonium was slightly reduced by common ions typically present in secondary waste water effluents. Column experiments revealed higher enrichment factor for ammonium (120) than for phosphate (50) using 1 M NaOH as elution solution. A reduction of zeolite phosphate capacity with regeneration cycles was observed.

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“…1 23 . There are some similarities and also differences with other studied clinoptilolites in literature, for example in a sample studied by Derikvandi, and Nezamzadeh-Ejhieh (2017) for a zeolite obtained from Isfahan, Iran.…”

Section: Characterization Of Natural Clinoptilolite Zeolitementioning

confidence: 99%

Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics

Jorfi

Ahmadi

Pourfadakari

et al. 2017

Polish Journal of Chemical Technology

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The main aim of this study was to evaluate the effi ciency of natural zeolite for Cr(VI) removal from aqueous solutions. Following simple modifi cation of adsorbent, the effect of operational parameters including pH (2-10), adsorbent dosage (2-20 g/L), contact time (5-150 min) and Cr(VI) concentration (10-50 mg/L) were studied according to one-factor-at-a-time procedure. The maximum Cr(VI) removal of 99.53% was obtained at initial pH of 2, contact time of 30 min, adsorbent dosage of 8 g/L and initial chromium concentration of 10 mg/L. The Freundlich isotherm was best fi tted with experimental data (R2 = 0.951). Also, type 1pseudo second order kinetic model showed the most correlation (R2 = 1) with the experimental data. According to obtained results, it can be concluded that the application of clay-like adsorbents such as natural clinoptilolite zeolite can be considered as an effi cient alternative for fi nal treatment of effl uents containing Cr(VI).

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Adsorption kinetic of arsenates as water pollutant on iron, manganese and iron–manganese-modified clinoptilolite-rich tuffs

Cited by 73 publications

References 42 publications

Adsorption of arsenic(V) by iron-oxide-coated diatomite (IOCD)

Adsorption of arsenic(V) by iron-oxide-coated diatomite (IOCD)

Simultaneous phosphate and ammonium removal from aqueous solution by a hydrated aluminum oxide modified natural zeolite

Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics

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