ISOTERMAS DE ADSORÇÃO DE ÍONS CÁLCIO (Ca+2) EM MATERIAIS CELULÓSICOS

Brunela Pereira da Silva; Lorenna Almeida Botelho; Abelardo Barreto de Mendonça Neto; Rita de Cássia Superbi de Sousa; Carlos Roberto Bellato; Deusanilde de Jesus Silva

doi:10.18540/jcecvl2iss3pp132-145

Authors

Brunela Pereira da Silva Universidade Federal de Viçosa
Lorenna Almeida Botelho Universidade Federal de Viçosa
Abelardo Barreto de Mendonça Neto Universidade Federal de Viçosa
Rita de Cássia Superbi de Sousa Universidade Federal de Viçosa
Carlos Roberto Bellato Universidade Federal de Viçosa
Deusanilde de Jesus Silva Universidade Federal de Viçosa

DOI:

https://doi.org/10.18540/jcecvl2iss3pp132-145

Keywords:

Hard Water, Adsorption, Microcrystalline Cellulose, Bleached Eucalyptus Kraft pulp, Calcium ion (Ca 2)

Abstract

Water used in industrial processes requires a special treatment to achieve a
high level of quality. In this context, the aim of this study was to investigate the use of cellulosic materials for water softening, such as microcrystalline cellulose (101 µm and 500 µm) and bleached Eucalyptus Kraft pulp. Firstly, the kinetic study was made in order to optimize operation parameters and then the adsorption processes were conducted, at three different levels of pH and different concentrations of calcium. The results showed that the pseudo-second order kinetic model had the best correlation coefficient and the Freundlich isotherm model was more appropriate to fit the experimental data, with the
highest adsorption capacity observed at pH 7,0 for all the tested materials. At this pH, the microcrystalline cellulose adsorbed more than the bleached Eucalyptus Kraft pulp. Thus, it could be concluded that the proposed objectives were achieved.

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Author Biography

Brunela Pereira da Silva, Universidade Federal de Viçosa

Sou Engenheira Química graduada pela Universidade Federal de Viçosa, em Minas Gerais. Atualmente sou Mestranda em Engenharia Química na Universidade Federal de Minas Gerais.