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-The capacity of activated carbons obtained from different raw materials, such as sugarcane bagasse, babassu (Orbygnia speciosa), and coconut (Cocus nucifera) shells, to remove residual chlorine is studied. The influence of particle size and time of contact between particles of activated carbon and the chlorinated solution were taken into account. The adsorptive properties of the activated carbons were measured by gas adsorption (BET method), using an ASAP 2010 porosimeter, and liquid phase adsorption, employing iodine and methylene blue adsorbates. The activated carbon from sugarcane bagasse was the only adsorbent capable of removing 100% of the residual chlorine.

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4 2 Abslracl ~ Consrant temperalure hor wire anernometerr are widely used in measure fluid velocity. In this work if is shown that srrch sysrern can he used to measurefluidflow in the forced oscillations technique applird IO rhe huaurn respimlory system, in subsritution to rile pneu,notachohograph. Experimental results are shown to compare he proposed system with the original one. Keywords -flow measurement. anemometer. hot-wire sensor, forced oscillatiott.