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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....
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2021
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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. |
format | Online Article Text |
id | pubmed-8074630 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
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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