Adsorção de fósforo por solo tratado do semiárido brasileiro
Eutrophication is a major cause of deterioration of aquatic ecosystems worldwide and occurs when nutrients, nitrogen and phosphorus improve, leading to overgrowth of algae, especially cyanobacteria, which can release toxins and cause imbalance in biota and on physicochemical properties of water....
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/36989 |
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| Resumo: | Eutrophication is a major cause of deterioration of aquatic ecosystems worldwide and
occurs when nutrients, nitrogen and phosphorus improve, leading to overgrowth of algae,
especially cyanobacteria, which can release toxins and cause imbalance in biota and on
physicochemical properties of water. This continuous nutrient resource, whether from
point or diffuse sources, on aquatic systems results in increased phosphorus on sediment,
which can lead to internal fertilization, which is an internal and relevant source. To
mitigate this problem, restoration techniques such as the application of geo-engineering
(manipulation of the biogeochemical cycle of the phosphorus) using natural or modified
adsorbents for phosphorus adsorption molecules can be applied. Thus, the objective of
this work was to evaluate the application of geoengineering techniques when using a
natural soil of the Brazilian tropical semiarid (Planosol/Afisols) with simple modification
by acidification with the intention of enhancing its adsorption at low cost at low cost. For
data analysis we used the Langmuir isotherm model and it showed that for the soil in
question the acid soil was not satisfactory. This is probably due to the mineralogical
composition of the soil that has some low zero-charge point (PCZ) minerals and
insufficient pH-dependent fillers to meet the treatment and was therefore not responsive
to adsorption. This work was important to show the unfeasibility of this methodology in
low PCZ soils, bringing new findings and direction to new work and new approaches that
help bridge the low cost geoengineering gap. |
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