Biosorption of radioactive cesium from contaminated water by microalgae Haematococcus pluvialis and Chlorella vulgaris.


:The biosorption properties of water-soluble radioactive cesium (137Cs) by microalga Haematococcus pluvialis were evaluated with different cell conditions, and its cesium-uptake rate was compared with that by other microalgae, Chlorella vulgaris and Anabaena sp. Photo-induced H. pluvialis red cyst rapidly removed radioactive cesium from the solution by bioaccumulation. We showed that the effectiveness of 137Cs uptake is dependent on the specific cell condition of even the same microalgal species. While the H. pluvialis red cyst removed almost 95% of the soluble 137Cs in 48 h, both H. pluvialis intermediate cells and C. vulgaris showed 90% uptake efficiency of 137Cs with slow uptake rate. The energy dispersive spectrometer data demonstrated that the cesium uptake acceleration by inducing astaxanthin in H. pluvialis red cyst involves the cesium accumulation through the potassium transport channel. The long-term monitoring experiments of the cesium uptake showed that only 40% of 137Cs remained in collapsed H. pluvialis cell fragments after 12 months.


J Environ Manage


Lee KY,Lee SH,Lee JE,Lee SY




Has Abstract


2019-03-01 00:00:00












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