Natural zeolites for heavy metals removal from aqueous solutions: Modeling of the fixed bed Ba2+/Na+ ion-exchange process using a mixed phillipsite/chabazite-rich tuff

Abstract Under varied conditions, the IRC 718 ion-exchange resin is used to extract chromium (VI) ions from aqueous solutions. On chromium (VI) removal effectiveness, the effects of adsorption dosage, contact time, beginning metal concentration, and pH were examined. The batch ion exchange process reached equilibrium after around 90 minutes of interaction. With an initial chromium (VI) concentration of 0.5 mg/dm3, the pH-dependent ion-exchange mechanism revealed maximal removal in the pH 2.0–10 range . The adsorption mechanism occurs between Cr(VI) determined as the electron acceptor, and IRC 718 determined as the electron donor. The equilibrium ion-exchange potential and ion transfer quantities for Amberlite IRC 718 were calculated using the Langmuir adsorption isotherm model. The overall ion exchange capacity of the resin was determined to be 187.72 mg of chromium (VI)/g of resin at an ideal pH of 6.0.

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Elimination of Heavy Metals by the Carix Ion Exchange Process

Recent Developments in Ion Exchange ◽

10.1007/978-94-009-3449-8_15 ◽

1987 ◽

pp. 165-172

Author(s):

W. Höll ◽

J. Horst

Keyword(s):

Heavy Metals ◽

Ion Exchange ◽

Exchange Process ◽

Ion Exchange Process

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Spectroscopic and Mineralogical Characterization of Bentonite Clay (Ghardaïa, Algeria) for Heavy Metals Removal in Aqueous Solutions

International Journal of Environmental Research ◽

10.1007/s41742-019-00232-6 ◽

2019 ◽

Vol 14 (1) ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

Souad Athman ◽

Ali Sdiri ◽

Makhlouf Boufatit

Keyword(s):

Heavy Metals ◽

Aqueous Solutions ◽

Bentonite Clay ◽

Mineralogical Characterization ◽

Heavy Metals Removal ◽

Metals Removal

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Recycling of incinerated sewage sludge ash as an adsorbent for heavy metals removal from aqueous solutions

Journal of Environmental Management ◽

10.1016/j.jenvman.2019.06.115 ◽

2019 ◽

Vol 247 ◽

pp. 509-517 ◽

Cited By ~ 8

Author(s):

Qiming Wang ◽

Jiang-shan Li ◽

Chi Sun Poon

Keyword(s):

Heavy Metals ◽

Sewage Sludge ◽

Aqueous Solutions ◽

Sewage Sludge Ash ◽

Heavy Metals Removal ◽

Metals Removal ◽

Sludge Ash

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Heavy metal removal from waste waters by phosphonate metal organic frameworks

Pure and Applied Chemistry ◽

10.1515/pac-2017-0307 ◽

2018 ◽

Vol 90 (1) ◽

pp. 35-47 ◽

Cited By ~ 5

Author(s):

Bianca Maranescu ◽

Lavinia Lupa ◽

Aurelia Visa

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Aqueous Solutions ◽

Metal Ions ◽

Phosphonic Acid ◽

Metal Organic Frameworks ◽

Waste Waters ◽

Heavy Metals Removal ◽

Metals Removal ◽

Metal Organic

AbstractThe increase attention in the area of phosphonate metal organic framework is exemplified with a variety of applications and a rich chemistry of these compounds. Water pollution caused by heavy metal ions is a major concern due to their toxicity to many life forms. In order to decrease the heavy metals impact upon the environment various technologies of water treatment such as: chemical sedimentation, ion exchange, redox process are studied. The tendency is to find a versatile and economical method of heavy metals removal from waste waters. Phosphonate metal organic frameworks were obtained by the reaction of Ni(CH3COO)2·4H2O, phosphonic acid (phosphonoacetic (CP), vinyl phosphonic acid (VP) and N,N-bis(phosphonomethyl)glycine (Gly)) in hydrothermal conditions. Coordination polymers synthesized were characterized by FTIR, XRD, scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). The adsorption processes represent a very good alternative for heavy metals removal due to low costs and ease of operation. In the present paper the adsorption performance of the mentioned materials in the removal process of heavy metals from aqueous solutions, was studied using the batch method. The adsorption conditions were investigated by varying the initial pH, contact time and adsorbate initial concentration for chromium metal ions removal from aqueous solutions. It was found that the adsorption efficiency of the studied materials in the removal process of Cr(VI) ions from aqueous solutions is in the following order: Ni-CP<Ni-Gly≤Ni-VP.

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