Biosorption of Uranyl Ions from Aqueous Solution by Parachlorella sp. AA1

Ja-Young Yoon, In-Hyun Nam and Min-Ho Yoon
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Ja-Young Yoon: Geologic Environment Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Korea
In-Hyun Nam: Geologic Environment Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Korea
Min-Ho Yoon: Department of Bio Environmental Chemistry, Chungnam National University, Daejeon 34134, Korea

IJERPH, 2021, vol. 18, issue 7, 1-9

Abstract: In the present study we investigated the ability of the microalgal strain Parachlorella sp. AA1 to biologically uptake a radionuclide waste material. Batch experiments were conducted to investigate the biosorption of uranyl ions (U(VI)) in the 0.5–50.0 mg/L concentration range by strain AA1. The results showed that AA1 biomass could uptake U(VI). The highest removal efficiency and biosorption capacity (95.6%) occurred within 60 h at an initial U(VI) concentration of 20 mg/L. The optimum pH for biosorption was 9.0 at a temperature of 25 °C. X-ray absorption near edge structure analysis confirmed the presence of U(VI) in pellets of Parachlorella sp. AA1 cells. The biosorption methods investigated here may be useful in the treatment and disposal of nuclides and heavy metals in diverse wastewaters.

Keywords: biosorption; uranyl ions; XANES analysis; microalgae; Parachlorella sp. AA1 (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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