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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1168| Arsenic Retention and Distribution in Treatment Wetlands | |
| MARIA TERESA ALARCON HERRERA MARIO ALBERTO OLMOS MARQUEZ IGNACIO MARTIN | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Arsenic Treatment Wetlands | |
| Arsenic (As) can be removed from water through its retention in constructed wetlands. The aim of this study was to analyze the arsenic retention in treatment wetland prototypes, as well as its distribution along the flow gradient in a treatment wetland mesocosmos. Experiments were carried out in laboratoryscale wetland prototypes, two planted with E. macrostachya and one without plants. Samples of water were taken at the inlet and outlet of the prototype during the testing period. At the end of the experiment, plants and soil (silty-sand) from each prototype were divided in three equal segments (entrance, middle and exit) and analyzed for their arsenic content. Results revealed that the planted wetlands have a higher As-mass retention capacity (87- 90% of the total As inflow) than prototypes without plants (27%). As-mass balance in the planted wetlands revealed that 78% of the total inflowing As was retained in the soil bed. Nearly 2% was absorbed in the plant roots. In the prototype without plants, the soil retained only 16% of As-mass, 72% of the arsenic was accounted for in the outflow. The plants retained only 2% of the total arsenic mass in their roots; however its presence was determinant for arsenic retention in the wetland soil medium. Therefore, it can be assumed that treatment wetlands are a suitable option for treating As-contaminated water. | |
| 2014 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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|---|---|---|---|
| Arsenico-wetlands.pdf | 80.57 kB | Adobe PDF | Visualizar/Abrir |