Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater
This article presents the results of experimental studies for information support of the hydraulic compartment of the mathematical model of physicochemical iron removal from groundwater. It is experimentally established that the bound water in the deposit significantly exceeds the mineral component...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-10-01
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| Series: | Water Supply |
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| Online Access: | http://ws.iwaponline.com/content/22/10/7603 |
| _version_ | 1811192838300368896 |
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| author | S. Yu Martynov V. L. Poliakov |
| author_facet | S. Yu Martynov V. L. Poliakov |
| author_sort | S. Yu Martynov |
| collection | DOAJ |
| description | This article presents the results of experimental studies for information support of the hydraulic compartment of the mathematical model of physicochemical iron removal from groundwater. It is experimentally established that the bound water in the deposit significantly exceeds the mineral component (chemical iron) for any waters with the different levels of iron oxidation. The deposit dehydration takes place at its boundary with the liquid phase. As a result, ferrous iron is gradually oxidized and ferric iron transforms from hydroxide forms to oxide forms, which leads to a decrease in the deposit volume and a increase in its density and strength. Further, the coefficient of the deposit hydrodynamic stability is proposed to use to take into account changes in the properties of the deposit that accumulates in the granular medium. It is experimentally determined that the iron amount remaining in the medium after backwashing increases simultaneously with the deposit's age. It will lead to a gradual reduction of the operational dirt capacity of the granular medium and a need to have measures of the filtration properties restoration or to replace the filter medium entirely.
HIGHLIGHTS
The properties of the deposit change during the iron removal from water at the rapid filter.;
The coefficient of the deposit hydrodynamic stability.;
The bound water is dominated in the deposit at the rapid filters.;
The residual contaminants in the granular medium increase.;
The undetachable kinetics of the physicochemical iron removal of groundwater.; |
| first_indexed | 2024-04-11T23:58:52Z |
| format | Article |
| id | doaj.art-cc0d1b46775c4d26b7d241c10449083b |
| institution | Directory Open Access Journal |
| issn | 1606-9749 1607-0798 |
| language | English |
| last_indexed | 2024-04-11T23:58:52Z |
| publishDate | 2022-10-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Supply |
| spelling | doaj.art-cc0d1b46775c4d26b7d241c10449083b2022-12-22T03:56:18ZengIWA PublishingWater Supply1606-97491607-07982022-10-0122107603761710.2166/ws.2022.305305Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwaterS. Yu Martynov0V. L. Poliakov1 Department of Water Supply, Sewerage and Drilling, National University of Water and Environmental Engineering, 11 Soborna street, Rivne, Ukraine Department of Applied Hydrodynamics, Institute of Hydromechanics of National Academy of Sciences of Ukraine, 8/4 Maria Kapnist street, Kyiv, Ukraine This article presents the results of experimental studies for information support of the hydraulic compartment of the mathematical model of physicochemical iron removal from groundwater. It is experimentally established that the bound water in the deposit significantly exceeds the mineral component (chemical iron) for any waters with the different levels of iron oxidation. The deposit dehydration takes place at its boundary with the liquid phase. As a result, ferrous iron is gradually oxidized and ferric iron transforms from hydroxide forms to oxide forms, which leads to a decrease in the deposit volume and a increase in its density and strength. Further, the coefficient of the deposit hydrodynamic stability is proposed to use to take into account changes in the properties of the deposit that accumulates in the granular medium. It is experimentally determined that the iron amount remaining in the medium after backwashing increases simultaneously with the deposit's age. It will lead to a gradual reduction of the operational dirt capacity of the granular medium and a need to have measures of the filtration properties restoration or to replace the filter medium entirely. HIGHLIGHTS The properties of the deposit change during the iron removal from water at the rapid filter.; The coefficient of the deposit hydrodynamic stability.; The bound water is dominated in the deposit at the rapid filters.; The residual contaminants in the granular medium increase.; The undetachable kinetics of the physicochemical iron removal of groundwater.;http://ws.iwaponline.com/content/22/10/7603bound waterhead losseshydraulic conductivityiron removalmathematical modelrapid filter |
| spellingShingle | S. Yu Martynov V. L. Poliakov Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater Water Supply bound water head losses hydraulic conductivity iron removal mathematical model rapid filter |
| title | Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater |
| title_full | Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater |
| title_fullStr | Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater |
| title_full_unstemmed | Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater |
| title_short | Experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater |
| title_sort | experimental studies on the hydrodynamic properties of a deposit in rapid filters during physicochemical removal of iron from groundwater |
| topic | bound water head losses hydraulic conductivity iron removal mathematical model rapid filter |
| url | http://ws.iwaponline.com/content/22/10/7603 |
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