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Removal of carbon nanomaterials by co-precipitation with chitosan: a facile method for water pre-treatment

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Abstract

Anthropogenic contamination of the environment by engineered nanomaterials (ENM) is an emerging environmental problem; therefore, it is important to develop efficient technologies for contaminated water treatment. Chitosan was used as a flocculant for the co-precipitation and removal of water-dispersed carbon nanomaterials (hydroxylated carbon nanotubes (CNT-OH) and fullerenes (C60-OH)) by changing the solution pH, which affects chitosan solubility. The precipitation of chitosan was accompanied by efficient entrapment of water-dispersed ENM into an insoluble precipitate which resulted in >90% ENM removal during single treatment. Factors controlling the efficiency of ENM removal by the chitosan-assisted co-precipitation method, such as the molecular weight of chitosan, the presence of low-molecular-weight electrolytes, the separation method, etc., are discussed.

Graphical abstract: Removal of carbon nanomaterials by co-precipitation with chitosan: a facile method for water pre-treatment

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Publication details

The article was received on 31 Jul 2017, accepted on 20 Nov 2017 and first published on 22 Nov 2017


Article type: Paper
DOI: 10.1039/C7EW00283A
Citation: Environ. Sci.: Water Res. Technol., 2018, Advance Article
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    Removal of carbon nanomaterials by co-precipitation with chitosan: a facile method for water pre-treatment

    T. Soenaryo, A. Zinchenko and S. Murata, Environ. Sci.: Water Res. Technol., 2018, Advance Article , DOI: 10.1039/C7EW00283A

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