Design of hybrid goethite nanocomposites as potential sorbents for lanthanum from aqueous media

Nano-goethite (NG) was synthesized using a co-precipitation method, where the surface of NG was modified by composite formation with activated carbon and sodium alginate, respectively, to increase adsorption capacity. The adsorption process of La(III) was optimized at defined conditions: pH 5.0, con...

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Bibliographic Details
Published in:Separation science and technology 2021-11, Vol.56 (17), p.2865-2879
Main Authors: Sayed, Moubarak A., Aly, H. F., Mahmoud, H. H., Abdelwahab, S. M., Helal, A. I., Wilson, Lee D.
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Alginic acid
Aqueous solutions
Capacity
Goethite
Lanthanum
Nano-goethite
Nanocomposites
Seaweed meal
Sodium
Sodium alginate
Sorbents
Uptake
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Summary:Nano-goethite (NG) was synthesized using a co-precipitation method, where the surface of NG was modified by composite formation with activated carbon and sodium alginate, respectively, to increase adsorption capacity. The adsorption process of La(III) was optimized at defined conditions: pH 5.0, contact time 6.0 h, sorbent dosage (0.1 g/20 ml) and an initial La 3+ concentration (500 ppm). The maximum La(III) adsorption capacity (mg/g) was determined using the Sips model, as follows: pristine NG (49.5), activated carbon modified goethite: GAC-2 (44.0) and GAC-1 (56.8), and sodium alginate modified goethite: GSA-1 (63.9) and GSA-2 (77.8). The kinetic uptake profiles of La 3+ were described by pseudo first order model. The sorbents can be classified according to their relative adsorption capacity, as follows: GSA-2 > GSA-1 > GAC-1 > NG > GAC-2.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2020.1853168