Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and models
The riparian zone is a typical groundwater-surface water interaction zone, and there are few research reports on the behavior of arsenic in this interaction zone under different hydrodynamic conditions. In this study, the river sand samples from the riparian zone are collected to carry out indoor co...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2022-03-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202105016 |
| _version_ | 1811170249490300928 |
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| author | Jian HUANG Huimei SHAN Sanxi PENG Hailing DU Hui CHEN Chunya ZENG |
| author_facet | Jian HUANG Huimei SHAN Sanxi PENG Hailing DU Hui CHEN Chunya ZENG |
| author_sort | Jian HUANG |
| collection | DOAJ |
| description | The riparian zone is a typical groundwater-surface water interaction zone, and there are few research reports on the behavior of arsenic in this interaction zone under different hydrodynamic conditions. In this study, the river sand samples from the riparian zone are collected to carry out indoor column experiments, the influence of different hydrodynamic factors (including flow velocity and particle size) on the migration of arsenic in the river sand are analyzed, and related models are established. The results show that (1) at a flow rate of 0.5 mL/min, the adsorption rate of the river sand on As(V) and the time required to reach an equilibrium state are both faster than those on As(III), and the smaller the particle size, the more obvious the phenomenon; at a flow rate of 1.0 mL/min, the adsorption rate of the river sand with different particle sizes on As(V) increases with the increasinng particle size, but there is no significant difference in the adsorption of As(III). (2) In a packed column filled with sand of the same particle size, the adsorption capacity of the river sand for As(III) and As(V) decreases with the increasing flow velocity. (3) Under the conditions of different flow rates and particle sizes, the migration processes of As(III) and As(V) in the sand column are more in line with the Thomas model, and the fitting R2 are higher than those of the Yoon-Nelson and Adams-Bohart models under the same conditions. Among them, at low flow rates, the Thomas model fitting R2 (≥0.94) to the migration processes of As(III) and As(V) in the particle size of 0.15−0.25 mm are significantly better than that of the larger particle size of 1.00−2.00 mm. At high flow rates, the model has little difference in fitting R2 to the migration process of arsenic in different particle sizes. |
| first_indexed | 2024-04-10T16:55:00Z |
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| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:55:00Z |
| publishDate | 2022-03-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-2cdb219abf0048ee864c6e49759148b72023-02-07T08:18:09ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652022-03-0149219520610.16030/j.cnki.issn.1000-3665.202105016202105016Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and modelsJian HUANG0Huimei SHAN1Sanxi PENG2Hailing DU3Hui CHEN4Chunya ZENG5Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin, Guangxi 541004, ChinaGuangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin, Guangxi 541004, ChinaCollege of Earth Science, Guilin University of Technology, Guilin, Guangxi 541004, ChinaGuangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin, Guangxi 541004, ChinaGuangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin, Guangxi 541004, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, Guilin, Guangxi 541004, ChinaThe riparian zone is a typical groundwater-surface water interaction zone, and there are few research reports on the behavior of arsenic in this interaction zone under different hydrodynamic conditions. In this study, the river sand samples from the riparian zone are collected to carry out indoor column experiments, the influence of different hydrodynamic factors (including flow velocity and particle size) on the migration of arsenic in the river sand are analyzed, and related models are established. The results show that (1) at a flow rate of 0.5 mL/min, the adsorption rate of the river sand on As(V) and the time required to reach an equilibrium state are both faster than those on As(III), and the smaller the particle size, the more obvious the phenomenon; at a flow rate of 1.0 mL/min, the adsorption rate of the river sand with different particle sizes on As(V) increases with the increasinng particle size, but there is no significant difference in the adsorption of As(III). (2) In a packed column filled with sand of the same particle size, the adsorption capacity of the river sand for As(III) and As(V) decreases with the increasing flow velocity. (3) Under the conditions of different flow rates and particle sizes, the migration processes of As(III) and As(V) in the sand column are more in line with the Thomas model, and the fitting R2 are higher than those of the Yoon-Nelson and Adams-Bohart models under the same conditions. Among them, at low flow rates, the Thomas model fitting R2 (≥0.94) to the migration processes of As(III) and As(V) in the particle size of 0.15−0.25 mm are significantly better than that of the larger particle size of 1.00−2.00 mm. At high flow rates, the model has little difference in fitting R2 to the migration process of arsenic in different particle sizes.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202105016arsenicriver sanddifferent particle sizesdifferent flow ratescolumn experiment |
| spellingShingle | Jian HUANG Huimei SHAN Sanxi PENG Hailing DU Hui CHEN Chunya ZENG Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and models Shuiwen dizhi gongcheng dizhi arsenic river sand different particle sizes different flow rates column experiment |
| title | Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and models |
| title_full | Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and models |
| title_fullStr | Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and models |
| title_full_unstemmed | Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and models |
| title_short | Influence of hydrodynamic factors on the migration of arsenic in river sand: Column experiment and models |
| title_sort | influence of hydrodynamic factors on the migration of arsenic in river sand column experiment and models |
| topic | arsenic river sand different particle sizes different flow rates column experiment |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202105016 |
| work_keys_str_mv | AT jianhuang influenceofhydrodynamicfactorsonthemigrationofarsenicinriversandcolumnexperimentandmodels AT huimeishan influenceofhydrodynamicfactorsonthemigrationofarsenicinriversandcolumnexperimentandmodels AT sanxipeng influenceofhydrodynamicfactorsonthemigrationofarsenicinriversandcolumnexperimentandmodels AT hailingdu influenceofhydrodynamicfactorsonthemigrationofarsenicinriversandcolumnexperimentandmodels AT huichen influenceofhydrodynamicfactorsonthemigrationofarsenicinriversandcolumnexperimentandmodels AT chunyazeng influenceofhydrodynamicfactorsonthemigrationofarsenicinriversandcolumnexperimentandmodels |