Adsorption of Astrazon Blue FGRL onto sepiolite from aqueous solutions

Öngen, Atakan; Özcan, Hüseyin; Özbaş, Emine Elmaslar; Balkaya, Nilgün

doi:10.1080/19443994.2012.671156

Cited by 26 publications

(11 citation statements)

References 47 publications

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“…Figure 1 shows us FTIR spectrum of Sep and MSep. According to FTIR spectrum, the bands at 3566 cm -1 , 3422 cm -1 for Sep (Fig 1a) and band at 3570 cm -1 (Fig 1b) for MSep belong to the asymmetric and symmetric vibration of water (Ongen et al, 2012). The band at 1211 cm -1 is attributed to the lattice vibrations of Si-O.…”

Section: Adsorption Studiesmentioning

confidence: 94%

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Comparing adsorption activity of raw Sepiolite and CTAB modified Sepiolite: kinetic and adsorption study for removal of Hg+

2015

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In our study adsorption of Hg+2 ions from water solutions on Sepiolite (Sep) and Modified Sepiolite (MSep) with cationic surfactants namely cetyl trimethyl ammonium bromide CTAB was investigated. Different parameters were used to investigate such as contact time, pH and adsorbent dosage. The adsorption capacity of MSep and Sep was examined. Both particles were characterized with FTIR spectrum. According to the our results the equilibrium adsorption data corresponded to the Langmuir isotherm and qmax was 54,7 mg/g and 104,1 mg/g for Sep and MSep respectively. Kinetic parameters showed that pseudo-second-order adsorption kinetic model was the best model than the pseudo-first-order. MSep is more active adsorbent than Sep and it can be the best alternative adsorbent for removing of heavy metal from industrial waste water. In addition MSep can be used as adsorbent for removal of nonpolar toxic organic molecules, because sepiolite surface can be converted from hydrophilic form to hydrophobic form by CTAB resulting in increased the adsorption capacity.International Journal of Environment Vol.4(4) 2015: 19-31

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Section: Adsorption Studiesmentioning

confidence: 94%

“…Si-O-Mg octahedral-tetrahedral linkage for MSep and Sep is 469 cm -1 and 473 cm -1 respectively. The bands at 650 cm -1 and at 647 cm -1 are Mg-OH bending vibration (Ongen et al, 2012 andEren et al, 2010).…”

Section: Adsorption Studiesmentioning

confidence: 99%

Comparing adsorption activity of raw Sepiolite and CTAB modified Sepiolite: kinetic and adsorption study for removal of Hg+

2015

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“…Owing to its high surface area, chemical and mechanical stability, macro/microporosity, and active sorption sites (especially silanol groups) together with its low cost and abundance, sepiolite is currently widely used in a wide variety of industrial and environmental applications as a industrial adsorbent including solid waste and wastewater treatment (Maqueda et al 1995;Öztürk and Kavak 2004;Sabah and Çelik 2006;Yıldız and Gür 2007;Guerra et al 2010;Bektaş et al 2011;Wang et al 2013), carrier for chemicals, moisture control, household uses (use in ashtrays to avoid smoke odor, control of liquid leakages and odors in dustbins, odor removal in refrigerators) and in retention of micropollutants such as heavy metal cations, dyes, ammonium and phosphate (Çelik et al 2001;Balcı and Dincel 2002;Sabah and Celik 2002;Uğurlu and Karaoğlu 2011), pesticides (Gonzales-Pradas et al 1987;Gonzales-Pradas et al 1999;Casal et al 2001), and others. High-capacity values were also observed for heavy metals (Hellios-Rybicka 1985;Munoz et al 1996;Brigatti et al 1996;Brigatti et al 2000;Kara et al 2003;Lazarević et al 2007;Kocaoba 2009;Doğan et al 2009;Lazarević et al 2011;Dönmez et al 2015;) and cationic or anionic dyes (Aznar et al 1992;Özcan et al 2004;Doğan et al 2006;Doğan et al 2007;Alkan et al 2007;Santos and Boaventura, 2008;Uğurlu 2009;Öngen et al 2012;Qiu et al 2013;Han et al 2014;Tekin et al 2015) removal using...…”

Section: Introductionmentioning

confidence: 90%

Mechanistic insight into pyrene removal by natural sepiolites

Sabah

Ouki

2017

Environ Sci Pollut Res

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This paper investigates the sorption characteristics and mechanisms of pyrene onto two types of natural sepiolite-brown (B-Sep) and white (W-Sep). The effects of relevant properties such as clay content, surface area, pore diameter and volume, divalent cations, and organic carbon content were investigated by single component batch adsorption systems. The results suggest that pyrene has high affinity for both sepiolite and its sorption behavior could be mainly affected by exchangeable strongly hydrated cations such as Ca and HO in the zeolite-like channels and by open channel defects (OCD) structures but no so much by the large number of Si-OH groups located on the sepiolite's basal surfaces. Mesoporosity rather than surface area largely controls the sorption capacity and intensity of both sepiolites. This is shown by the increase in pore volume that exhibited the greatest increase in BET surface area. Particle size and morphological changes of both sepiolites following pyrene adsorption determined by FE-SEM showed that the sepiolite fibers are much longer than their widths, which are only several laths (several nanometers). This is a result of growth, mostly along the c-axis, at the expense of the diffusion of pyrene molecules through aqueous solution. As a consequence, a significant fibrous morphology is produced following the adsorption of pyrene by both sepiolites.

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“…The natural clay is more efficient in terms of adsorption and gives a very rapid reaction with ammonium than Chinese zeolite which needs 60 min to reach the equilibrium [29]. The equilibrium time of Astrazon blue onto sepiolite was 90 min [30].…”

Section: Effect Of Contact Timementioning

confidence: 99%

Ammonium nitrogen removal from synthetic water by treatment with Tunisian natural clay

Eturki

Kallali²,

Jedidi³

et al. 2012

Desalination and Water Treatment

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A B S T R A C TThe objective of the present study was to investigate the removal of nitrogen in the form of ammonium ions N-NH þ 4 from aqueous solutions using natural clay. The Tunisian clay from the Beni Ayech area (northeastern of Tunisia) was characterized and used as natural adsorbing materials. The N-NH þ 4 removal efficiency by clays in a dry state as well as in a liquid colloidal state has been investigated. A series of batch experiments were conducted to ascertain the ability of natural clay (smectite clay) to remove ammonium from synthetic wastewater samples composed of ammonium acetate (CH 3 CO 2 NH 4 ). The reaction with ammonium was observed to be very rapid, with all the amount of ammonium ions being sorbed in the first 10 min in all instances. Estimated ammonium nitrogen adsorbed was favored by low sorbate concentration, small particle size of sorbent, and an alkaline medium. The sorption kinetics studies strongly indicated that the sorption process was largely governed by interlayer spaces diffusion and that 10 min are sufficient to adsorb a maximum of ammonium. Among the parameters studied are the adsorption isotherms, solution pH, adsorption contact time, and the preconditioning and treatment of rural wastewater by this natural clay.

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Adsorption of Astrazon Blue FGRL onto sepiolite from aqueous solutions

Cited by 26 publications

References 47 publications

Comparing adsorption activity of raw Sepiolite and CTAB modified Sepiolite: kinetic and adsorption study for removal of Hg+

Comparing adsorption activity of raw Sepiolite and CTAB modified Sepiolite: kinetic and adsorption study for removal of Hg+

Mechanistic insight into pyrene removal by natural sepiolites

Ammonium nitrogen removal from synthetic water by treatment with Tunisian natural clay

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