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Brazilian Bentonite Submitted to Mild Acid Treatment Under Moderated Conditions

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Characterization of Minerals, Metals, and Materials 2015

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Abstract

The present paper presents the study of light green smectite clay, from Paraiba, Brazil, submitted to mild acid attack under moderated conditions. Usually, clays are subjected to treatment with strong inorganic acids at temperatures near the boiling point and at high acid concentrations and then, widely used as bleaching agents. The treatment occurred under bellow boiling temperature and at short times of reaction (90°C, reaction times of 1, 6, 12, 18 and 24 hours in close reactor, concentration of the aqueous solution of hydrochloric acid 1.5 M, clay/acid solution ratio of 1g/10mL). The purpose of these attacks is to reduce the concentration of impurities providing color, with minimal change in the clay minerals structure, aiming at use in products of high value such as cosmetics and polymer/clay nanocomposites. The raw clay and the attacked samples were characterized by X-ray diffraction (XRD), cation exchange capacity (CEC), stereomicroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray detector (EDS).

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Authors and Affiliations

  1. Laboratory of Non Metalic Materials Pérsio de Souza Santos Department of Metallurgical and Materials Engineering, Universidade de São Paulo, 05508-900, São Paulo, SP, Brazil

    C. G. Bastos Andrade, V. F. Justo, D. M. Fermino, M. G. S. Valenzuela & F. R. Valenzuela-Diaz

  2. CETMIC Centro de Tecnología de Recursos Minerales y Cerámica, Argentina

    C. Volzone

Authors
  1. C. G. Bastos Andrade
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  2. V. F. Justo
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  3. D. M. Fermino
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  4. M. G. S. Valenzuela
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  5. C. Volzone
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  6. F. R. Valenzuela-Diaz
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Editor information

Editors and Affiliations

  1. Materials Science and Technology Division, Los Alamos National Laboratory, Canada

    John S. Carpenter (technical staff member) (technical staff member)

  2. Department of Metallurgical Engineering, School of Materials Science and Engineering, Chongqing University, China

    Chenguang Bai (Professor) (Professor)

  3. School of Engineering and Information Technology, UNSW Australia at the Australian Defence Force Academy, Australia

    Juan Pablo Escobedo (Lecturer) (Lecturer)

  4. Department of Materials Science and Engineering, Michigan Technological University, USA

    Jiann-Yang Hwang (Professor) (Professor)

  5. University of Jordan, Jordan

    Shadia Ikhmayies B.Sc. from the physics department

  6. Department of Materials Science and Engineering and Institute of Materials Processing, Michigan Technological University, USA

    Bowen Li (Research Associate Professor) (Research Associate Professor)

  7. CanmetMATERIALS in Natural Resources Canada, Canada

    Jian Li (research scientist) (research scientist)

  8. Military Institute of Engineering (IME), Rio de Janeiro, Brazil

    Sergio Neves Monteiro (Professor) (Professor)

  9. Department of Materials Science and Engineering, Michigan Technological University, USA

    Zhiwei Peng (Research Assistant Professor, a new faculty member) (Research Assistant Professor, a new faculty member)

  10. Central South University, China

    Zhiwei Peng (Research Assistant Professor, a new faculty member) (Research Assistant Professor, a new faculty member)

  11. ArcelorMittal Global R&D, East Chicago, Indiana, USA

    Mingming Zhang (a senior research engineer) (a senior research engineer)

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© 2015 TMS (The Minerals, Metals & Materials Society)

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Andrade, C.G.B., Justo, V.F., Fermino, D.M., Valenzuela, M.G.S., Volzone, C., Valenzuela-Diaz, F.R. (2015). Brazilian Bentonite Submitted to Mild Acid Treatment Under Moderated Conditions. In: Carpenter, J.S., et al. Characterization of Minerals, Metals, and Materials 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48191-3_44

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