Adsorption of Cr(VI) on hexadecylpyridinium bromide (HDPB) modified natural zeolites

Zeng, Yubin; Woo, Heesoo; Lee, Gwanghun; Park, Junboum

doi:10.1016/j.micromeso.2009.10.016

Cited by 114 publications

(63 citation statements)

References 31 publications

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“…Generally, the majority of chromium are found in forms of Cr(III) and Cr(VI) in aquatic environment 1 . Cr(III) is commonly less toxic and has been known to be essential in metabolism of glucose in mammals 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption is one of most frequently methods used for Cr(VI) removal from aqueous solutions because of their economical and effective treatments. Many adsorbents have been developed for the Cr(VI) adsorption from aqueous samples such as non-conventional adsorbent (activated carbon) 5,6 , granular activated charcoal (GAC) 7 and zeolites (natural and synthetic zeolite) 1 . Natural zeolite is one of the adsorbent used in adsorption of Cr(VI) because of its effective performance and low cost 1 .…”

Section: Introductionmentioning

confidence: 99%

“…Many adsorbents have been developed for the Cr(VI) adsorption from aqueous samples such as non-conventional adsorbent (activated carbon) 5,6 , granular activated charcoal (GAC) 7 and zeolites (natural and synthetic zeolite) 1 . Natural zeolite is one of the adsorbent used in adsorption of Cr(VI) because of its effective performance and low cost 1 . Generally, natural zeolite collected from different places has different characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

2017

Rasayan J Chem

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Natural zeolite collected from Ende-Flores Indonesia was characterized and activated with acid solution for Cr(VI) adsorption from aqueous solution. This natural zeolite is mainly composed of quartz and 50% mordenite. The kinetic adsorption modeling was fitted best with the pseudo-second-order model, whereas isotherm adsorption followed the Langmuir model with the maximum adsorption (Qmax) of NZ and ANZ are 0.189 mg/g and 1.040 mg/g. Moreover the ANZ was favorable for adsorption of Cr(VI) respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

2017

Rasayan J Chem

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“…The zeolites which are modified by a surface active agent can be used for the treatments of different types of ions, and make the treatment of wastewater with complex compositions possible. This modification using a surface active agent is a key technology for the application of raw zeolites in wastewater treatment (Leyva-Ramos et al, 2008;Zeng, Woo, Lee, & Park, 2010). Currently, many research studies have investigated these modified zeolite's adsorption performances with many dyes, such as reactive black 5, reactive red 239, reactive yellow 176, acid orange 8, and acid orange II (Ayşegul, Ozgur, Abdullah Zahid, & Mustafa, 2008;Benkli, Can, Turan, & Çelik, 2005;Jin, Jiang, Shan, Pei, & Chen, 2008;Dogan Karadag, 2007;Torres-Pérez, Solache-Ríos, & Olguín, 2007).…”

Section: Introductionmentioning

confidence: 99%

The Adsorption of Rhodamine B in Water by Modified Zeolites

Wang¹,

Li²,

Pan³

et al. 2016

MAS

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In this study, modified zeolites were prepared through the modification of raw zeolites, using hydrochloric acid (HCl) and cetyl trimethyl ammonium bromide (CTAB), whose properties were then characterized by a Zeta Potential Meter and an X-ray diffractometer. Also, the adsorption mechanisms were investigated in depth. The experimental results indicated that, in terms of the adsorption capacity of Rhodamine B in water, the modified zeolites were more favorable than the raw zeolites. As the dosage of adsorbent increased, the removal percentage of Rhodamine B in the water increased, while the unit adsorption capacity decreased. The pH value of the solution, and reaction temperature imposed little effects on the adsorption of the Rhodamine B. In accordance with the adsorption thermodynamic results, Langmuir and Freundlich isothermal adsorption models were able to accurately describe the adsorption of Rhodamine B in water by the modified zeolites. The fitting results had a higher correlation when using a Freundlich isothermal model. At 303 K, the static saturated adsorption capacity was 4.41 mg/g. The kinetic results demonstrated that the adsorption of Rhodamine B in water using modified zeolites fit well with the pseudo-second-order kinetic model.

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“…An example of the fi rst approach is the use of synthetic resins (Gode and Pehlivan 2005, Rengaraj et al 2003, Zhao et al 1998 or modifi ed natural zeolites (Barrer 1978, Campos et al 2007, Faghihian and Bowman 2005, Li 2006, Misaelides et al 2008, Rhodes 2007, Robson 2001, Vignola et al 2008, Zeng et al 2010, Li and Hong 2009, since the affi nity of zeolites for anionic species can be greatly enhanced by modification with certain cationic surfactants or suitable cations or even bacteria (Erdogan et al 2012).…”

mentioning

confidence: 99%

Iron(II) modified natural zeolites for hexavalent chromium removal from contaminated water

Lofù¹,

Mastrorilli²,

Dell’Anna³

et al. 2016

Archives of Environmental Protection

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Three different types of Fe(II)-modified natural zeolites were tested as supports in continuous-flow columns for the treatment of Cr(VI) contaminated water. The natural zeolites chosen as support were commercially available Zeosand (80% clinoptilolite), ATZ (79% phillipsite/chabazite), and ZS-55RW (90% Chabazite). All the examined modified zeolites turned out active for hexavalent chromium abatement, lowering its concentration below the European regulation level, even at relatively high flow rates (40 mL/h, linear velocity 15 cm/h). Zeosand, having a broader pH range of stability, was found to be the best one in terms of both Fe(II) uptake (0.54 wt%) and Cr removal (90 mg Cr/Kg zeolite).

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Adsorption of Cr(VI) on hexadecylpyridinium bromide (HDPB) modified natural zeolites

Cited by 114 publications

References 31 publications

Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

The Adsorption of Rhodamine B in Water by Modified Zeolites

Iron(II) modified natural zeolites for hexavalent chromium removal from contaminated water

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