A novel freeze-dried natural microalga powder for highly efficient removal of uranium from wastewater | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

8781654

Reference Type

Journal Article

Title

A novel freeze-dried natural microalga powder for highly efficient removal of uranium from wastewater

Author(s)

Cheng, Y; Li, F; Liu, N; Lan, T; Yang, Y; Zhang, T; Liao, J; Qing, R

Year

2021

Is Peer Reviewed?

Yes

Journal

Chemosphere
ISSN: 0045-6535
EISSN: 1879-1298

Publisher

Elsevier

Volume

282

Issue

Elsevier

Page Numbers

131084

Language

English

DOI

10.1016/j.chemosphere.2021.131084

Web of Science Id

WOS:000679230700007

URL

https://linkinghub.elsevier.com/retrieve/pii/S0045653521015563
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Abstract

It is of great significance to develop convenient methods and low-cost materials to remove uranium from wastewater. Ankistrodesmus sp., an easy growing green alga, was employed for highly efficient removal of uranium from aqueous solution. The biosorption results under different experimental condition indicate that the alga possess outstanding uranium adsorption ability (qmax = 601.2 mg g-1). Moreover, Ankistrodesmus sp. could be effectively regenerated with hydrochloric acid solution (0.1 M) and used again for uranium adsorption. Even in simulated mine water with various coexisting ions, Ankistrodesmus sp. also exhibits high removal efficiency (95.6%) towards uranium. Furthermore, the adsorption behavior of uranium by alga could be described in the Freundlich isotherms model and the adsorption process was consistent with the pseudo-second-order kinetics model. The characteristic of Fourier transform infrared spectrum, scanning electron microscopy, transmission electron microscope and X-ray photoelectron spectroscopy reveal that -NH2, -COOH, -CONH2 and C-O groups have participated in biosorption process. Therefore, complexation, electrostatic adsorption and ions exchange are the dominated action of uranium biosorption in the algae. All findings in this work suggest that Ankistrodesmus sp. can be a promising candidate for the effective and practical application in field of disposed uranium contamination.

Keywords

Uranium; Alga; Ankistrodesmus sp; Biosorption; Uranium mine water; GREEN-ALGAE; SACCHAROMYCES-CEREVISIAE; SPIRULINA-PLATENSIS; AQUEOUS-SOLUTIONS; BIOSORPTION; ADSORPTION; EQUILIBRIUM; EXTRACTION; U(VI); BATCH