Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 22, Pages 11815-11823Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b01159
Keywords
graphene; diatomaceous earth; aerogel; adsorption; mercury
Funding
- Australian Research Council [FT110100711]
- University of Adelaide, School of Chemical Engineering
- Valence Industries Ltd.
- Archer Exploration Ltd.
- Australian Research Council [FT110100711] Funding Source: Australian Research Council
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A simple synthetic approach for the preparation of graphene-diatom silica composites in the form of self-assembled aerogels with three-dimensional networks from natural graphite and diatomite rocks is demonstrated for the first time. Their adsorption performance for the removal of mercury from water was studied as a function of contact time, solution pH, and mercury concentration to optimize the reaction conditions. The adsorption isotherm of mercury fitted well with the Langmuir model, representing a very high adsorption capacity of >500 mg of mercury/g of adsorbent. The prepared aerogels exhibited outstanding adsorption performance for the removal of mercury from water, which is significant for environmental applications.
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