Criciúma, Brazil
Criciúma, Brazil

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Melo C.R.,Federal University of Santa Catarina | Riella H.G.,Federal University of Santa Catarina | Kuhnen N.C.,Federal University of Santa Catarina | Melo A.R.,Faculdade SATC | And 4 more authors.
International Journal of Environment and Pollution | Year: 2014

This research analysed the behaviour of heavy metals adsorption by zeolites and their associated applicability for treating acid mine drainage (AMD). The type 4A zeolite used was synthesised by a hydrothermal reaction using kaolin derived from the waste pulping process of white paper. For the development of kinetic studies of adsorption, samples were collected from AMD that were located in the southern State of Santa Catarina, Brazil. The optimal conditions for the removal of iron and manganese have been investigated by testing the adsorption, varying both the mass of zeolites used and adsorption times for a quantity of 1 litre of AMD. Adsorption studies have shown that in the first 15 minutes, approximately 80% of Fe was adsorbed. The adsorption of Mn was also efficient. Kinetic parameters were determined by the Langmuir isotherm, which allowed for the calculation of the theoretical adsorption of metals as a function of time. Copyright © 2014 Inderscience Enterprises Ltd.

Melo C.R.,Federal University of Santa Catarina | Angioletto E.,University of the Extreme South of Santa Catarina | Riella H.G.,Federal University of Santa Catarina | Peterson M.,University of the Extreme South of Santa Catarina | And 4 more authors.
Journal of Thermal Analysis and Calorimetry | Year: 2012

Research focused on the transformation and utilization of industrial wastes into products of commercial interest plays an increasingly important role. Residual pulp can become useful in the manufacture of different materials, providing high value to this waste and reducing its environmental impact when disposed of improperly in the environment. The main constituents of this waste are kaolin and calcium carbonate (CaCO 3). Starting from kaolin, metakaolin can be produced by calcination of the residue at 630 °C for 2 h in a rotary reactor with air flow, followed by solubilization with hydrochloric acid to remove the CaCO 3. The development of technological alternatives aimed at the reuse of certain wastes can result in applications of real economic interest to the chemical industry and ceramics and glass, which is the case in this study. The raw material and metakaolin obtained were analyzed by thermogravimetric analysis and derivative thermogravimetric analysis, X-ray diffraction, and X-ray fluorescence spectroscopy with promising results. This is because metakaolin was obtained free of contamination by other materials. © Akadémiai Kiadó, Budapest, Hungary 2011.

Diogo Spacek A.,Faculdade SATC | Hideo Ando Junior O.,Faculdade SATC | Mota Neto J.,Faculdade SATC | Coelho V.,Faculdade SATC | And 3 more authors.
IEEE Latin America Transactions | Year: 2013

This paper presents the development of a methodology to manage the mechanic vibration and temperature from Small Wind Turbine (SWT). The objective with this research is propose a new diagnostic and protection tool through analysis and monitoring signals of vibration and temperature from wind turbines, aiming predict a need of preventive maintenance and mostly avoids catastrophic failures. For this feature the system will be composed of a Triple Axis accelerometer who will identify vibration, thermocouples to identify the temperatures at critical points of wind turbine, a microcontroller hardware which will make acquisition and processing of signals from sensors and finally a wireless transmission system using technology ZigBee. The post processing is performed remotely through a computer that receives the data submitted via wireless network presenting them to the user via graphical interface. The software of User friendly interface will have the functionality plus online display of received data also the possibility of storing and reporting data rates of vibration and temperature obtained during monitoring. Finally featuring the prototype of the hardware and software as well as some results obtained in experimental scale. © 2003-2012 IEEE.

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