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U(VI) adsorption in water by sodium alginate modified Bacillus megaterium

The surface of Bacillus megaterium was modified by coating sodium alginate. The modified B. megaterium before and after adsorption were characterized by SEM, FTIR and XPS. The effects of pH, reaction time, initial U(VI) concentration and adsorbent dosage on the adsorption of U(VI) by the modified B....

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Autores principales: Li, Dianxin, Yang, Yiqing, Zhang, Peng, Liu, Jiangang, Li, Tao, Yang, Junwei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8074630/
https://www.ncbi.nlm.nih.gov/pubmed/33972881
http://dx.doi.org/10.1098/rsos.202098
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author Li, Dianxin
Yang, Yiqing
Zhang, Peng
Liu, Jiangang
Li, Tao
Yang, Junwei
author_facet Li, Dianxin
Yang, Yiqing
Zhang, Peng
Liu, Jiangang
Li, Tao
Yang, Junwei
author_sort Li, Dianxin
collection PubMed
description The surface of Bacillus megaterium was modified by coating sodium alginate. The modified B. megaterium before and after adsorption were characterized by SEM, FTIR and XPS. The effects of pH, reaction time, initial U(VI) concentration and adsorbent dosage on the adsorption of U(VI) by the modified B. megaterium were studied by batch adsorption experiments. The adsorption process was studied by pseudo-first-order kinetics and pseudo-second-order kinetic models, Langmuir and Freundlich isotherms. The results showed that the maximum adsorption capacity of U(VI) was 74.61 mg g(−1) under the conditions of pH 5.0, adsorbent 0.2 g l(−1), 30°C and initial U(VI) concentration of 15 mg l(−1). The adsorption process accords with pseudo-first-order kinetics and Langmuir isotherm. The adsorption capacity of U(VI) by the modified B. megaterium was still higher than 80% after five times of desorption and reuse experiments. In conclusion, the sodium alginate modified B. megaterium was an ideal material for U(VI) biosorption.
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spelling pubmed-80746302021-05-09 U(VI) adsorption in water by sodium alginate modified Bacillus megaterium Li, Dianxin Yang, Yiqing Zhang, Peng Liu, Jiangang Li, Tao Yang, Junwei R Soc Open Sci Chemistry The surface of Bacillus megaterium was modified by coating sodium alginate. The modified B. megaterium before and after adsorption were characterized by SEM, FTIR and XPS. The effects of pH, reaction time, initial U(VI) concentration and adsorbent dosage on the adsorption of U(VI) by the modified B. megaterium were studied by batch adsorption experiments. The adsorption process was studied by pseudo-first-order kinetics and pseudo-second-order kinetic models, Langmuir and Freundlich isotherms. The results showed that the maximum adsorption capacity of U(VI) was 74.61 mg g(−1) under the conditions of pH 5.0, adsorbent 0.2 g l(−1), 30°C and initial U(VI) concentration of 15 mg l(−1). The adsorption process accords with pseudo-first-order kinetics and Langmuir isotherm. The adsorption capacity of U(VI) by the modified B. megaterium was still higher than 80% after five times of desorption and reuse experiments. In conclusion, the sodium alginate modified B. megaterium was an ideal material for U(VI) biosorption. The Royal Society 2021-02-24 /pmc/articles/PMC8074630/ /pubmed/33972881 http://dx.doi.org/10.1098/rsos.202098 Text en © 2021 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Li, Dianxin
Yang, Yiqing
Zhang, Peng
Liu, Jiangang
Li, Tao
Yang, Junwei
U(VI) adsorption in water by sodium alginate modified Bacillus megaterium
title U(VI) adsorption in water by sodium alginate modified Bacillus megaterium
title_full U(VI) adsorption in water by sodium alginate modified Bacillus megaterium
title_fullStr U(VI) adsorption in water by sodium alginate modified Bacillus megaterium
title_full_unstemmed U(VI) adsorption in water by sodium alginate modified Bacillus megaterium
title_short U(VI) adsorption in water by sodium alginate modified Bacillus megaterium
title_sort u(vi) adsorption in water by sodium alginate modified bacillus megaterium
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8074630/
https://www.ncbi.nlm.nih.gov/pubmed/33972881
http://dx.doi.org/10.1098/rsos.202098
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