Polyamidoamine dendrimers modified silica gel for uranium(VI) removal from aqueous solution using batch and fixed-bed column methods | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

5075547

Reference Type

Journal Article

Title

Polyamidoamine dendrimers modified silica gel for uranium(VI) removal from aqueous solution using batch and fixed-bed column methods

Author(s)

Shaaban, AF; Khalil, AA; Lasheen, TA; Nouh, E; Ammar, H

Year

2018

Is Peer Reviewed?

Yes

Journal

Desalination and Water Treatment
ISSN: 1944-3994
EISSN: 1944-3986

Publisher

DESALINATION PUBL

Location

HOPKINTON

Volume

102

Page Numbers

197-210

Language

English

DOI

10.5004/dwt.2018.21813

Web of Science Id

WOS:000445107600021

Abstract

Different generations of modified silica gel with polyamidoamine (PAMAM) dendrimers were synthesized. The adsorbents were characterized using Fourier transform infrared, scanning electron microscopy with energy dispersive X-ray spectroscopy thermal gravimetric analysis and porous structure analysis. The uptake behavior of Si-6G PAMAM toward Li(VI) at different experimental conditions of pH, time, temperature and concentration was studied using batch mode. The maximum adsorption capacity of Si-6G PAMAM was 303.03 mg as described effectively by Langmuir isotherm model. Kinetics and thermodynamics studies of U(VI) adsorption onto Si-6G PAMAM showed an endothermic pseudo-second-order adsorption process. The experimental results in the column method were described by Thomas and Yoon-Nelson models under different operating conditions.

Keywords

Uranium; Adsorption; Silica gel; Polyamidoamine dendrimers; Fixed-bed column