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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1478| The effect of Vetiver (Chrysopogon zizanioides L.) in the removal of fluoride and other contaminants from water for human consumption in the village of Guarataro, Yaracuy State, Venezuela | |
| MARIA TERESA ALARCON HERRERA | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Chrysopogon zizanioides L. treatment of waters phytoremediation | |
| An essay was performed with vetiver grass of the hydroponic treatment of water contaminated with fluoride in the community of Guarataro, in Yaracuy state, Venezuela. This community has shown serious problems, especially damage to public health, due to the consumption of untreated water contaminated with fluoride. The high concentrations of this element in the drinking water coming from underground springs surpass the limits set by international norms. In conjunction with other factors, this has caused dental fluorosis in the population; this condition is characterized by dental lesions consisting of enamel alterations, as well as gingival and alveolar lesions in some cases. In this community, 93% of the population presents damage by dental fluorosis, especially children in school age. The main objective of this work was to develop a water treatment system for the removal of fluoride from water through the use of vetiver. The installed physical model consisted of five plastic containers of 200L each one, connected in series for treatment with vetiver like and for the treatment without vetiver (control). Five culms of vetiver approximately one year old were placed in the containers through a simple flotation system using plastic vessels. The plants, which were approximately 30 cm long, were allowed to grow in contaminated water. Samples to evaluate the behavior of the model were taken to the entrance and so much exit of the system vetiver like in the system without vetiver. An initial analysis was conducted 2 months after the installation of the treatment system. This analysis showed a slight reduction in the fluoride levels of the water, from 2,72 mg/l-1 a 2,22 mg/l-1 in the vetiver system. Further analyses were performed over several months, and the results showed that there was no reduction of the contaminant in the water of either system. Nutrient analyses (for nitrogen and phosphorus) were also performed; the results showed an important reduction of over 90% in the nitrate levels of the vetiver system. This system also showed an initial increase in phosphorus, but the level of this element later decreased to minimal levels. There was an increase in the electrical conductivity of the vetiver system with respect to the non-vetiver, and other parameters like temperature, pH and suspended solids were also measured. As for the chemical analysis performed on the plant tissue, there was evidence of fluoride accumulation in both the foliage and roots of vetiver | |
| 2010 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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