(x) , with composition 0.1 x 0.5 (in mol %) were studied. The structural changes due to the replacement of Sb 2 O 3 by WO 3 have been investigated. It was found that the incorporation of WO 3 enhances the thermal stability of the glasses against devitrification when compared to the binary Sb 2 O 3(0.6) -SbPO 4(0.4) composition. The connectivity of the network increases with WO 3 content which is consistent with the high values of the glass transition temperature. Raman studies suggest that WO 3 incorporation breaks the primary network, constituted by antimony oxide, while a second network containing WO 6 octahedral units is built up. Thermal and structural properties were evaluated by differential scanning calorimetry, infrared and Raman spectroscopies, 31 P Magic Angle Spinning NMR and X-ray absorption near edge structure (XANES) at L 1 and L 3 edges of Sb and L 1 edge of W atoms.
Este trabalho teve como objetivo testar a viabilidade de utilização do lodo que se forma na parede dos decantadores e floculadores da ETA na composição do substrato para produção de mudas do híbrido de E. urophylla X E. grandis (E. “urograndis”). O método de propagação utilizado foi a miniestaquia em tubetes de quatro estrias de 50 cm³. O experimento foi montado em casa de vegetação do viveiro de produção de mudas da CENIBRA no período de março a maio de 2009, em delineamento inteiramente casualizado (DIC), com 11 tratamentos e 4 repetições de 11 plantas. Avaliaram-se a porcentagem de sobrevivência, a altura da parte aérea, o diâmetro do coleto, a matéria seca da parte aérea, a matéria seca da raiz e o comprimento de raiz. O lodo de ETA se mostrou viável como composto de substrato para produção de mudas de E. “urograndis” até a proporção de 50%.
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