Textural characteristics, surface chemistry and activation of bleaching earth: A review

Hussin, F. and Aroua, M.K. and Daud, W.M.A.W. (2011) Textural characteristics, surface chemistry and activation of bleaching earth: A review. Chemical Engineering Journal, 170 (1). pp. 90-106. ISSN 1385-8947, DOI https://doi.org/10.1016/j.cej.2011.03.065.

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Abstract

The unique properties of clay and clay minerals had made them valuable in the wide range of industrial applications. Low cost, local availability and effectiveness are the prevailing factors that have made clay and clay mineral to be used extensively as adsorbent in the purification of vegetable oils. The textural characteristics and surface chemistry play important roles in the bleaching earth performance. These two factors can be modified by various techniques including acid, basic, organic, thermal and pillaring activation. In these reviews, a comprehensive list of literatures on chemical and physical modification techniques of the bleaching earth was compiled and reviewed in relation to its effect on the structure, surface chemistry and adsorption capacity.

Item Type:	Article
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Additional Information:	Cited By (since 1996):2 Export Date: 21 April 2013 Source: Scopus CODEN: CMEJA :doi 10.1016/j.cej.2011.03.065 Language of Original Document: English Correspondence Address: Aroua, M.K.; Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: mkaroua@um.edu.my References: Rossi, M., Gianazza, M., Alamprese, C., Stanga, F., The role of bleaching clays and synthetic silica in palm oil physical refining (2003) Food Chem., 82, pp. 291-296; Valenzuela-Diaz, F.R., Souza-Santos, P., Studies on the acid activation of Brazilian smectite clays (2001) Quim. Nova., 24, pp. 345-353; Morad, N.A., Aziz, M.K.A., Zain, R.M., (2001), Process design in degumming and bleaching of palm oil, Master Thesis, Universiti Teknologi Malaysia (UTM)AL-Zahrani, A.A., Daous, M.A., Recycling of spent bleaching clay and oil recovery (2000) Trans. 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Uncontrolled Keywords:	Activation; Bleaching earth; Surface chemistry; Textural characteristics; Adsorption capacities; Low costs; Physical modifications; Textural characteristic; Adsorption; Bleaching; Chemical modification; Cleaning; Industrial applications; Silicate minerals; Surface structure; Vegetable oils; Clay minerals.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	16 Jul 2013 03:27
Last Modified:	08 Nov 2017 08:40
URI:	http://eprints.um.edu.my/id/eprint/7410

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