| Title | Using local mineral materials for the rehabilitation of the Ustya River - a case study |
|---|---|
| ID_Doc | 64951 |
| Authors | Trach, Y; Melnychuk, V; Melnychuk, G; Mazur, L; Podlasek, A; Vaverková, MD; Koda, E |
| Title | Using local mineral materials for the rehabilitation of the Ustya River - a case study |
| Year | 2021 |
| Published | |
| Abstract | The process of eutrophication has a negative impact on the water body (flora and fauna) and decreases its aesthetic and recreational values. In this work, we propose to combine chemical and physical methods for the restoration of rivers and lakes in Ukraine with the help of region-ally occurring carbonates and quartz-glauconite sand. Experimental studies have shown that their use should have a high environmental effect on the improvement of the river water quality, that is, after the use of the Fe-coagulant. The addition of this coagulant can removal prostates and organic matter but may reduce the water pH. Therefore, to prevent stress recurrence in the aquatic ecosystem after adding natural calcium carbonate to water, its optimal doses were determined experimentally. It was found that the optimal application dose depended on the initial pH value of water and its mineralization. Experimental studies of the physical and chemical properties of quartz-glauconite sands have shown high values of the filtration coefficient, the capability of increas-ing the water pH value and improving the water reducing properties. These properties of natu-ral reactive materials (limestones and quartz-glauconite sand) were used to design and construct earth structures for river rehabilitation. Reactive materials can be placed on the river banks, parallel to the direction of the water flow, or as permeable reaction barriers constructed perpendicular to the river flow direction. After the rehabilitation works are completed, the area on the river banks may be adapted as a public space for the local residents. |
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