Treatment of Polluted Aqueous Solutions by Ni2+, Pb2+, Zn2+, Cr+6,Cd+2 and Co+2 Ions by Ion Exchange Process Using Faujasite Zeolite

Mekatel, H.; Amokrane, Samira; Benturki, Asma; Nibou, Djamel

doi:10.1016/j.proeng.2012.01.1176

Cited by 26 publications

(20 citation statements)

References 6 publications

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“…One of the unique properties of zeolites is their ability to exchange cations, which are located at specific sites at their channel cage system, by various cations from solutions. Zeolites are used for their special adsorption properties due to their unique surface chemistries and crystalline pore structures [36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

The removal of Cr (III) and Co (II) ions from aqueous solution by two mechanisms using a new sorbent (alumina nanoparticles immobilized zeolite) — Equilibrium, kinetic and thermodynamic studies

Deravanesiyan

Beheshti

Malekpour

2015

Journal of Molecular Liquids

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Section: Introductionmentioning

confidence: 99%

The removal of Cr (III) and Co (II) ions from aqueous solution by two mechanisms using a new sorbent (alumina nanoparticles immobilized zeolite) — Equilibrium, kinetic and thermodynamic studies

Deravanesiyan

Beheshti

Malekpour

2015

Journal of Molecular Liquids

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“…Se ha demostrado que zeolitas sintéticas como la NaX y la NaHX pueden ser usadas como intercambiadores iónicos o adsorbentes para recuperar iones Fe +3 de suelos y aguas (Nibou et al, 2010). De la misma forma la zeolita NaA resultó muy efectiva en la remoción de Zn 2+ (Nibou et al, 2010b (Mekatel et al, 2012).…”

Section: +2unclassified

Estudio Preliminar de la Capacidad de Remoción de Iones Inorgánicos de Una Zeolita Sintética Tipo Faujasita

Losada

Bonilla

Buitrago

et al. 2016

Rev. Fac. Cienc. Básicas

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La remoción de iones inorgánicos presentes en aguas residuales se realiza por medios fisicoquímicos como adsorción e intercambio iónico. Las zeolitas, como la faujasita, poseen características físicas, químicas y estructurales que los hacen materiales potencialmente útiles para la remoción de contaminantes de cuerpos de agua. Se sintetizó una zeolita tipo faujasita a partir de Al puro y sílica gel por el método sol-gel; se caracterizó por difracción de rayos X (DRX) y espectroscopía de infrarrojo (FTIR). Se determinó la capacidad de remoción de materia orgánica, sulfatos, fosfatos, nitrógeno amoniacal, dureza y alcalinidad presentes en aguas residuales domésticas (ARD) típicas de la ciudad de Florencia Caquetá y en aguas sintéticas. El trabajo experimental mostró buenos resultados a escala de laboratorio, con posible aplicación a escala real. Se identificó el material sintetizado como zeolita tipo faujasita Na-X. Debido al carácter básico de la zeolita sintetizada, solamente se observa remoción de cationes representados en dureza (Ca+2 y Mg+2), nitrógeno amoniacal y materia orgánica (Demanda Química de Oxígeno, DQO). La remoción es debida a intercambio catiónico y a procesos de adsorción de material coloidal. La remoción de material contaminante en orden descendente es dureza (Ca+2 y Mg+2) Material coloidal (materia orgánica).

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“…Compared to Cr(VI), trivalent chromium (Cr(III)) is less toxic and more vital for animals and humans [1,2]. The conventional approach for the reduction or removal of Cr(VI) includes electrochemical precipitation [3,4], adsorption [5,6], bacterial reduction [7,8], ion exchange [9,10], photoreduction [11][12][13][14][15][16], etc. Compared to the above methods, photocatalytic reactions are considered a clean and promising technology owing to its highly efficient photoreduction of Cr(VI) to the less harmful Cr(III).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Reduction of Cr(VI) by Combined Magnetic TiO2-Based NFs and Ammonium Oxalate Hole Scavengers

Chang

2019

Catalysts

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Heavy metal pollution of wastewater with coexisting organic contaminants has become a serious threat to human survival and development. In particular, hexavalent chromium, which is released into industrial wastewater, is both toxic and carcinogenic. TiO2 photocatalysts have attracted much attention due to their potential photodegradation and photoreduction abilities. Though TiO2 demonstrates high photocatalytic performance, it is a difficult material to recycle after the photocatalytic reaction. Considering the secondary pollution caused by the photocatalysts, in this study we prepared Ag/Fe3O4/TiO2 nanofibers (NFs) that could be magnetically separated using hydrothermal synthesis, which was considered a benign and effective resolution. For the photocatalytic test, the removal of Cr(VI) was carried out by Ag/Fe3O4/TiO2 nanofibers combined with ammonium oxalate (AO). AO acted as a hole scavenger to enhance the electron-hole separation ability, thereby dramatically enhancing the photoreduction efficiency of Cr(VI). The reaction rate constant for Ag/Fe3O4/TiO2 NFs in the binary system reached 0.260 min−1, 6.95 times of that of Ag/Fe3O4/TiO2 NFs in a single system (0.038 min−1). The optimized Ag/Fe3O4/TiO2 NFs exhibited high efficiency and maintained their photoreduction efficiency at 90% with a recyclability of 87% after five cycles. Hence, taking into account the high magnetic separation behavior, Ag/Fe3O4/TiO2 NFs with a high recycling capability are a potential photocatalyst for wastewater treatment.

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Treatment of Polluted Aqueous Solutions by Ni2+, Pb2+, Zn2+, Cr+6,Cd+2 and Co+2 Ions by Ion Exchange Process Using Faujasite Zeolite

Cited by 26 publications

References 6 publications

The removal of Cr (III) and Co (II) ions from aqueous solution by two mechanisms using a new sorbent (alumina nanoparticles immobilized zeolite) — Equilibrium, kinetic and thermodynamic studies

The removal of Cr (III) and Co (II) ions from aqueous solution by two mechanisms using a new sorbent (alumina nanoparticles immobilized zeolite) — Equilibrium, kinetic and thermodynamic studies

Estudio Preliminar de la Capacidad de Remoción de Iones Inorgánicos de Una Zeolita Sintética Tipo Faujasita

Enhanced Photocatalytic Reduction of Cr(VI) by Combined Magnetic TiO2-Based NFs and Ammonium Oxalate Hole Scavengers

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