2 documents found, page 1 of 1
Polycyclic aromatic hydrocarbons in superficial sediments of the Negro River in...
Souza, Hilton M.L.; Taniguchi, Satie; Bícego, M. C.; Oliveira, Luiz A.; Oliveira, Tereza Cristina de Souza; Barroso, Hiléia dos SantosPolycyclic aromatic hydrocarbons (PAHs) were identified and quantified in samples of superficial sediments of the Negro River, in the Amazon region of Brazil, through analyses performed by GC/MS. Total PAH concentration that includes parent and alkylated PAHs ranged from 6.5 to 5348 ng g-1 of dry weight. The Σ16 PAHs prioritized in environmental studies by the U.S. Environmental Protection Agency (USEPA) ranged...
Effect of particle size distribution and calcium aluminate cement on the rheolo...
Silva, Abílio P.; Segadães, A M; Pinto, Deesy G.; Oliveira, Luiz A.; Devezas, TessalenoPrevious works based on statistical design of experiments (DoE) defined a model all-alumina self-flow refractory castable (SFRC) with optimized particle size distribution for simultaneous high flowability index (FI) and superior post-sintering performance. This work compares the SFRC rheological behaviour and setting time with those of alternative all-alumina castables with different Andreasen aggregate particl...