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Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water
The seasonal out-of-limit of manganese ions (Mn(2+)) in the drinking water reservoirs is an intractable problem to water supply, which can pose a threat to the human health. In this study, the removal of Mn(2+) by using pristine (BC), pre-alkali (Pre-BC) and post-alkali (Post-BC) modified biochar or...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9115647/ https://www.ncbi.nlm.nih.gov/pubmed/35702442 http://dx.doi.org/10.1039/d2ra01720b |
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author | Zhao, Jie Ye, Zhi-Long Pan, Xiaofang Cai, Guangjing Wang, Jiani |
author_facet | Zhao, Jie Ye, Zhi-Long Pan, Xiaofang Cai, Guangjing Wang, Jiani |
author_sort | Zhao, Jie |
collection | PubMed |
description | The seasonal out-of-limit of manganese ions (Mn(2+)) in the drinking water reservoirs is an intractable problem to water supply, which can pose a threat to the human health. In this study, the removal of Mn(2+) by using pristine (BC), pre-alkali (Pre-BC) and post-alkali (Post-BC) modified biochar originating from rice straw was investigated. The maximum adsorption capacities obtained for BC, Pre-BC, and Post-BC were 20.59, 28.37, and 8.06 mg g(−1), respectively. The Langmuir isotherm model and the pseudo-second-order kinetic model were suitable fitting models to describe the adsorption process. The investigation of adsorption functions was carried out that revealed that the predominant forces were precipitation and cation exchange with the proportions of 43.38–69.15% and 38.05–55.79%, respectively. With regard to precipitation, Mn(ii) particles (Al–Si–O–Mn and MnCO(3)) and insignificantly oxidized insoluble Mn(iv) particles (MnO(2)) were formed on the biochar surface. Alkali and alkaline earth metals facilitated the behavior of cation exchange, where the primary contributing ions for cation exchange were Na(+), Mg(2+) and Ca(2+) during the adsorption process. These outcomes suggest that alkali pre-treated modification of biochar is practical for the application of manganese pollution control in lakes and reservoirs. |
format | Online Article Text |
id | pubmed-9115647 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-91156472022-06-13 Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water Zhao, Jie Ye, Zhi-Long Pan, Xiaofang Cai, Guangjing Wang, Jiani RSC Adv Chemistry The seasonal out-of-limit of manganese ions (Mn(2+)) in the drinking water reservoirs is an intractable problem to water supply, which can pose a threat to the human health. In this study, the removal of Mn(2+) by using pristine (BC), pre-alkali (Pre-BC) and post-alkali (Post-BC) modified biochar originating from rice straw was investigated. The maximum adsorption capacities obtained for BC, Pre-BC, and Post-BC were 20.59, 28.37, and 8.06 mg g(−1), respectively. The Langmuir isotherm model and the pseudo-second-order kinetic model were suitable fitting models to describe the adsorption process. The investigation of adsorption functions was carried out that revealed that the predominant forces were precipitation and cation exchange with the proportions of 43.38–69.15% and 38.05–55.79%, respectively. With regard to precipitation, Mn(ii) particles (Al–Si–O–Mn and MnCO(3)) and insignificantly oxidized insoluble Mn(iv) particles (MnO(2)) were formed on the biochar surface. Alkali and alkaline earth metals facilitated the behavior of cation exchange, where the primary contributing ions for cation exchange were Na(+), Mg(2+) and Ca(2+) during the adsorption process. These outcomes suggest that alkali pre-treated modification of biochar is practical for the application of manganese pollution control in lakes and reservoirs. The Royal Society of Chemistry 2022-05-18 /pmc/articles/PMC9115647/ /pubmed/35702442 http://dx.doi.org/10.1039/d2ra01720b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Zhao, Jie Ye, Zhi-Long Pan, Xiaofang Cai, Guangjing Wang, Jiani Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water |
title | Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water |
title_full | Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water |
title_fullStr | Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water |
title_full_unstemmed | Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water |
title_short | Screening the functions of modified rice straw biochar for adsorbing manganese from drinking water |
title_sort | screening the functions of modified rice straw biochar for adsorbing manganese from drinking water |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9115647/ https://www.ncbi.nlm.nih.gov/pubmed/35702442 http://dx.doi.org/10.1039/d2ra01720b |
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