AI Article Synopsis
- A flower-like nanostructured Fe(II)-Fe(III) hydroxy complex was created using a microwave-assisted method, showing promising properties for dye removal.
- The complex demonstrated strong adsorption of Congo red (CR) dye, achieving a remarkable capacity of 513 mg/g due to a combination of electrostatic interactions and other factors.
- In comparison, a Fe(III) hydroxy complex showed lower dye adsorption (296 mg/g) mainly through electrostatic interaction, indicating the unique advantages of the amorphous Fe(II)-Fe(III) complex.
Article Abstract
Amorphous Fe(II)-Fe(III) hydroxy complex with flower-like nanostructure was synthesized by ferric reduction using a microwave-assisted ethylene glycol approach. Here we investigated the correlation between its chemical composition and the removal rate for Congo red (CR) dye. The results showed that the amorphous complex had similar reduction and anion exchange capacities to the green rust. Due to the synergistic effect of attractive electrostatic interaction, anion exchange, ferrous redox and hydrogen bonding, the Fe(II)-Fe(III) hydroxy complex exhibited strong adsorption of CR with an estimated adsorption capacity up to 513 mg g. In contrast, the Fe(III) hydroxy complex had an adsorption capacity of 296 mg g because of the predominant mechanism based on the electrostatic interaction. The present study provides a facile synthesis of nanostructured iron hydroxy complex, with superior performance in adsorbing CR.
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| http://dx.doi.org/10.2166/wst.2018.303 | DOI Listing |
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