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Descripción
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| In recent years, the recycling of paper is increasing significantly due to their important environmental and economical benefits [1]. Paper recycling reduces the use of virgin fibre, the water and the energy consumption [1]. However, removing the ink, clay, coatings and contaminants from waste paper in order to produce recycled paper creates large amounts of waste materials such as de-inking paper sludges (DPS). The main components of DPS are cellulose fibres, calcite and kaolinite [2]. Due to their high organic matter content, DPS could be used as amendment to improve or restore soil fertility and biological functioning [3]. Other possible alternative is composting mixed with other organic materials in order to reduce their high C/N ratio [4]. Finally, cement industry could incorporate DPS due to their high calcite content [2]. Previous works carried out by our research group have shown that pyrolysis of differents waste paper industry leads to carbon-based adsorbents with interesting properties for the Cu removal from water [5]. The main objective of the present work is to study the behavior of carbon-based adsorbents prepared from pyrolysis of DPS in the removal of Cu, Ni, Zn and Cd at different pHs and metal concentrations (10-200mgL-1). Carbon-based adsorbents were prepared by pyrolysis at 650ºC during 2 hours. At this temperature, pyrolysis of cellulose and dehydration of kaolinite was finished. Characterization of carbon-based adsorbents (cation exchange capacity, pH, carbon content, BET, FTIR and SEM) was performed. The maximum adsorption according Langmuir equation at pH=3 and pH=5 follows the sequence: Zn>Cd>Ni>Cu. | |
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Internacional
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Si |
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Nombre congreso
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18th international Symposium on Analytical and Applied Pyrolysis |
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Tipo de participación
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960 |
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Lugar del congreso
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Lanzarote |
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Revisores
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Si |
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ISBN o ISSN
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0165-2370 |
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DOI
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http://hdl.handle.net/10261/4300 |
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Fecha inicio congreso
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18/05/2008 |
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Fecha fin congreso
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23/05/2008 |
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Desde la página
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251 |
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Hasta la página
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251 |
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Título de las actas
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Special issue Pyrolysys 2008 Advances in Analytycal and Applied Pyrolysys 2006-2008 |