Caracterização geográfica da dispersão do flúor, através de teores foliares, em espécies vegetais de interesse econômico, a partir do pólo cerâmico de Santa Gertrudes-SP
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2004-03-03
Autores
Fahl, Irene Aparecida Fávaro [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este trabalho teve como objetivo avaliar a emissão de flúor do pólo cerâmico de Santa Gertrudes-SP, e sua dispersão geográfica nas direções de Analândia, Araras, Holambra e São Pedro, através da determinação dos teores de flúor acumulados em folhas de plantas de quatro espécies vegetais de valor econômico café (Coffea arabica), citrus (Citrus sinensis), cana de açúcar (Saccharum oficinarum) e capim colonião (Panicum maximum), crescidas nas proximidades das indústrias e ao longo dos trajetos entre o pólo cerâmico e os locais descritos,assim como avaliar seus efeitos nas características anatômica das folhas de café e de capim colonião. Observou-se, que os maiores teores foliares de flúor (80 mg de flúor/kg de matéria seca (m.s.) de folha), foram acumulados pelas plantas de citrus e os menores (49 mg de flúor/kg de m.s. de folha) pelas plantas de cana de açúcar. Plantas de café e de capim colonião acumularam valores intermediários (69 e 54 mg de flúor/kg de m.s. folha), respectivamente. Em média, as dicotiledôneas (café e citrus) acumulam maiores teores foliares de flúor que as monocotiledôneas (cana de açúcar e capim colonião). A redução nos teores foliares de flúor, para 50% do teor máximo observado nas proximidades centro emissor, ocorreu a uma distância de 2,45 a 2,49 km, nos eixos Santa Gertrudes/São Pedro e Santa Gertrudes/Analândia, respectivamente, enquanto que no eixo Santa Gertrudes/Araras, a redução para 50% do teor máximo somente ocorreu a uma distância de aproximadamente 6,0 km do ponto de origem. Enquanto que, nos eixos em direção a Analândia, Araras e Holambra, teores foliares de 10 mg de flúor/kg de m. s. de folha, foram observados a cerca de 15 km da origem, na direção de São Pedro, esse valor somente foi observado a cerca de 20 km. Num raio de aproximadamente 10 km do Pólo emissor...
This work had the objective to evaluate the emission of fluorine of Santa Gertrudes, -São Paulo State ceramic region, and its geographical dispersion to the directions of Analândia, Araras, Holambra and São Pedro, through the determination of the tenors of accumulated fluorine in leaves of plants of four vegetable species such as coffee (Coffea arabica), citrus (Citrus sinensis), sugar cane (Saccharum oficinarum) and colonião grass (Panicum maximum), grown in the proximities of the industries and along the itineraries between the Ceramic Region and the nucleous of the fluorine scattering area. Also, to evaluate their effects in the anatomical characteristics of the leaves of coffee and colonião grass. It was observed that the largest foliate fluorine tenors (80 mg of F/kg of dry matter (d.m.), were accumulated for the citrus plants, and the smallests (49 mg of F/kg of d.m.) for the plants of sugar cane. Coffee and colonião grass plants accumulated intermediate values (69 and 54 mg of F/kg of d.m.), respectively. On average, the dicotyledonous plants (coffee and citrus) accumulate larger foliate tenors of fluorine than the monocotyledonous plants (sugar cane and colonião grass). The reduction in the foliate tenors of fluorine, for 50% of the maximum tenor observed in the proximities of the issuing center, happened at a distance from 2.45 to 2.49 km, in the axes Santa Gertrudes/São Pedro and Santa Gertrudes/Analândia, respectively. While in the axis Santa Gertrudes/Araras, the reduction for 50% of the maximum tenor only happened for a distance of approximately 6.0 km of the origin point. In the axes towards Analândia, Araras and Holambra, foliate tenors of 10 mg of F/kg of d. m. of leaf, were observed close to 15 km from the origin, while in São Pedro's direction, that value only was observed about 20 km. In a ray of approximately 10 km of the issuing center...(Complete abstract click electronic access below)
This work had the objective to evaluate the emission of fluorine of Santa Gertrudes, -São Paulo State ceramic region, and its geographical dispersion to the directions of Analândia, Araras, Holambra and São Pedro, through the determination of the tenors of accumulated fluorine in leaves of plants of four vegetable species such as coffee (Coffea arabica), citrus (Citrus sinensis), sugar cane (Saccharum oficinarum) and colonião grass (Panicum maximum), grown in the proximities of the industries and along the itineraries between the Ceramic Region and the nucleous of the fluorine scattering area. Also, to evaluate their effects in the anatomical characteristics of the leaves of coffee and colonião grass. It was observed that the largest foliate fluorine tenors (80 mg of F/kg of dry matter (d.m.), were accumulated for the citrus plants, and the smallests (49 mg of F/kg of d.m.) for the plants of sugar cane. Coffee and colonião grass plants accumulated intermediate values (69 and 54 mg of F/kg of d.m.), respectively. On average, the dicotyledonous plants (coffee and citrus) accumulate larger foliate tenors of fluorine than the monocotyledonous plants (sugar cane and colonião grass). The reduction in the foliate tenors of fluorine, for 50% of the maximum tenor observed in the proximities of the issuing center, happened at a distance from 2.45 to 2.49 km, in the axes Santa Gertrudes/São Pedro and Santa Gertrudes/Analândia, respectively. While in the axis Santa Gertrudes/Araras, the reduction for 50% of the maximum tenor only happened for a distance of approximately 6.0 km of the origin point. In the axes towards Analândia, Araras and Holambra, foliate tenors of 10 mg of F/kg of d. m. of leaf, were observed close to 15 km from the origin, while in São Pedro's direction, that value only was observed about 20 km. In a ray of approximately 10 km of the issuing center...(Complete abstract click electronic access below)
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Palavras-chave
Geografia física - Aspectos ambientais, Fluor, Fluoretos, Ceramica - Industria Indústria, Estudos ambientais, Coffea arabica, Citrus sinensis, Panicum maximum, Saccharum oficinarum, Environmental studies, Fluorine, Fluorides, Coffea arabica
Como citar
FAHL, Irene Aparecida Fávaro. Caracterização geográfica da dispersão do flúor, através de teores foliares, em espécies vegetais de interesse econômico, a partir do pólo cerâmico de Santa Gertrudes-SP. 2003. xi, 104 f. Dissertação (mestrado) - Universidade Estadual Paulista, Instituto de Geociências e Ciências Exatas, 2003.