Efficient coagulation and removal of aqueous graphene oxide by different dyes

Despite graphene oxide (GO)’s excellent physical and chemical properties, recent researches suggest its toxicity in biological applications. In this study, three dyes, methylene blue (MB), rhodamine-B (RhB) and methyl orange (MO), are used as coagulants to remove GO from aqueous solution. Results sh...

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Bibliographic Details
Published in:Desalination and water treatment 2021-03, Vol.217, p.339-349
Main Authors: Zhu, Xiaobin, Zhang, Jinlei, Wu, Shuyi, Zhou, Zhengcun
Format: Article
Language:English
Subjects:
Coagulation
Electrostatic interaction
Graphene oxide
Methylene blue
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Summary:Despite graphene oxide (GO)’s excellent physical and chemical properties, recent researches suggest its toxicity in biological applications. In this study, three dyes, methylene blue (MB), rhodamine-B (RhB) and methyl orange (MO), are used as coagulants to remove GO from aqueous solution. Results show that MB has the best performance with maximum coagulation capacity up to 2.27 g/g, higher than that of most other coagulants. Electrostatic interaction plays a key role in coagulation, also aided by π–π stacking interaction. Besides its great coagulation capacity, MB itself is a pollutant abundant in many types of wastewater, providing a readily accessible reagent, which makes it more suitable for the application.
ISSN:1944-3986
1944-3986
DOI:10.5004/dwt.2021.26889