Abstract
Abstract In order to minimize environmental impact zeolite A was synthesized using waste from the paper industry. This waste is composed of cellulose, kaolin and calcium carbonate. Waste purification was carried through thermal and chemical treatment, which consisted of initial calcination, acid washing with HCl, then calcination of the solid fraction to obtain metakaolin and evaporation of the liquid fraction to obtain CaCl2. Zeolite 4A was produced by static autoclaving under hydrothermal synthesis at different temperatures, crystallization times and NaOH concentrations. As a source of aluminum and silicon metakaolin was used. The synthesis of zeolite 5A was performed by ion exchange with CaCl2. After that, the waste paper (in natura and HCl treatment) and the zeolites 4A and 5A were characterized by XDR, SEM, FTIR, AAS and thermal analysis. The temperature is a key factor in zeolite synthesis at lower concentrations allowing one to obtain zeolite 5A by ion exchange with zeolite 4A.
Highlights
In order to minimize environmental impact zeolite A was synthesized using waste from the paper industry
The demand for more economical raw materials resulted in processes that arise from the use of clay minerals, with kaolin being the most widely used, because these minerals are a natural source of Al2O3 and SiO2, which are used to replace chemical reagents such as sodium aluminate and silica (Breck,1984)
The sources of silicon and aluminum used in zeolite synthesis were obtained from kaolin and the source of Ca+2 ions used in cation exchange was calcium chloride, both from the waste from paper industries in the state of Santa Catarina, Brazil
Summary
In order to minimize environmental impact zeolite A was synthesized using waste from the paper industry. Faced with encouraging recycling and reuse (Campos, 2014; great demand for different products, constant needs of Triguero et al, 2016) This will result in less waste consumers, high competition and economic growth, and in cost savings by managing and technology and investment must be coordinated and reducing the number of landfills, since this is the programmed to avoid depletion of natural resources, cheapest and most common means of waste disposal enhance people's quality of life on the planet and care (Lorenzett et al, 2012). When sodium is replaced with calcium, zeolite changes from the 4A to the 5A structure, and sodium replaced with potassium results in the 3A structure (Loiola et al, 2012; Zhang et al, 2013) In this context, the objective of this research was to produce zeolite 5A by ion exchange from the zeolite 4A synthesized from the waste from the paper industry
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