Size-dependent As(V) adsorption of reduced graphene oxide/magnetite nanocomposites

Arsenic (As(V)) contamination in aqueous resources poses a significant environmental, and public health risk due to its high toxicity. To address this challenge, we synthesized and characterized novel reduced graphene oxide/magnetite (rGO/Fe 3 O 4 ) nanocomposites, which are efficient adsorbents for...

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Bibliographic Details
Published in:Analytical sciences 2024-12, Vol.40 (12), p.2213-2224
Main Authors: Mai, Duc Dung, To, Thanh Loan, Bui, Thi Hang, Nguyen, Thi Kim Lien, Luong, Thi Kim Phuong, Nguyen, Thi Lan
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
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Summary:Arsenic (As(V)) contamination in aqueous resources poses a significant environmental, and public health risk due to its high toxicity. To address this challenge, we synthesized and characterized novel reduced graphene oxide/magnetite (rGO/Fe 3 O 4 ) nanocomposites, which are efficient adsorbents for removing As(V). Using a co-precipitation method, we obtained three distinct sizes of rGO/Fe 3 O 4 nanocomposites by controlling the salt concentration (Fe 2+ : Fe 3+ ) ratios. Analysis of the adsorption ability of the samples shows that the adsorption efficiency can reach up to 98.10% within 90 min, and the adsorption capacity value reaches 20.55 mg/g. Furthermore, these test data are ably consistent with both the pseudo-second-order model and the Langmuir model, based on which the adsorption mechanism has been proposed. These results show that the rGO/Fe 3 O 4 nanocomposites that we synthesized are a potential adsorbent for the removal of heavy metals from water. Graphical abstract
ISSN:0910-6340
1348-2246
1348-2246
DOI:10.1007/s44211-024-00657-w