Preparation of activated bentonite and its adsorption behavior on oil-soluble green pigment
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Wuhan University of Technology
Publication date: 2017-03-19
Corresponding author
Huimin Gao   

Wuhan University of Technology, No.122 Luoshi Road, Hongshan District, 430070 Wuhan, China
Physicochem. Probl. Miner. Process. 2017;53(2):829-845
The present research work focuses on effective preparation of activated bentonite (AB) and its application in removal of oil-soluble green pigment (OSGP) from either vegetable oils or food-processing wastewater. Mono-factor experiments were carried out to explore the effects of operation factors in preparation of AB. The parameters investigated were the effect of contact time, adsorbent dosage, initial OSGP concentration and temperature. The chemical composition, crystalline phases, microstructure and functional groups of prepared AB were characterized and evaluated by X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR), respectively. The adsorption kinetics and equilibrium isotherms were studied, finding that the adsorption process fitted better with the pseudo-second-order model and the Freundlich isotherm equation. In addition, thermodynamic parameters, such as standard the Gibbs free energy (ΔG°), standard enthalpy (ΔH°) and standard entropy (ΔS°) were also calculated, indicating that adsorption was spontaneous and endothermic. The findings of this investigation suggest that AB prepared through microwave activation as a cheap adsorbent holds great potential to remove oil-soluble green pigment in the wastewater treatment process.
AMIN N.K., 2009, Removal of direct blue-106 pigment from aqueous solution using new activated carbons developed from pomegranate peel: adsorption equilibrium and kinetics, J. Hazard. Mater. 165, 52-62.
ACEMIOĞLU B., 2004, Adsorption of Congo red from aqueous solution onto calcium-rich fly ash, J. Colloid Interf. Sci. 274, 371-379.
BAYRAK Y., 2003, Adsorption isotherms in bleaching hazelnut oil, J. Am. Oil Chem. Soc. 80, 1143-1146.
CAGLAYAN M.O., KAFA S., YIGIT N., 2005, Al-pillared clay for cottonseed oil bleaching: an optimization study, J. Am. Oil Chem. Soc. 82, 599-602.
CHOWDHURY S., MISHRA R., SAHA P., KUSHWAHA P., 2011, Adsorption thermodynamics, kinetics and isosteric heat of adsorption of malachite green onto chemically modified rice husk, Desalination, 265, 159-168.
CHAKRABORTY S., PURKAIT M.K., DASGUPTA S., DE S., BASU J.K., 2003, Nanofiltration of textile plant effluent for color removal and reduction in COD, Sep. Purif. Technol. 31, 141-151.
FOLETTO E.L., PAZ D.S., GUNDEL A., 2013, Acid-activation assisted by microwave of a Brazilian bentonite and its activity in the bleaching of soybean oil, Appl. Clay Sci. s 83-84, 63-67.
HO Y.S., MCKAY G., 1999, Pseudo-second order model for sorption processes, Process Biochem. 34, 451-465.
HG/T 2569-2007, 2007, Acticated bentonite, Chemical industry standard of China. (in Chinese).
KORICHI S., ELIAS A.L., MEFTI A., 2009, Characterization of smectite after acid activation with microwave irradiation, Appl. Clay Sci. 42, 432-438.
KORICHI S., ELIAS A.L., MEFTI A., BENSMAILI A., 2012, The effect of microwave irradiation and conventional acid activation on the textural properties of smectite: Comparative study, Appl. Clay Sci. s 59-60, 76-83.
LI Y., DU Q., LIU T., QI Y., ZHANG P., WANG Z., XIA Y., 2011, Preparation of activated carbon from Enteromorpha prolifera and its use on cationic red X-GRL removal, Appl. Surf. Sci. 257, 10621-10627.
LIU Y., HUANG J., WANG X., 2008, Adsorption isotherms for bleaching soybean oil with activated attapulgite, J. Am. Oil Chem. Soc. 85, 979-984.
LEDAKOWICZ S., SOLECKA M., ZYLLA R., 2001, Biodegradation, decolourisation and detoxi¬fication of textile wastewater enhanced by advanced oxidation processes, J. Biotechnol. 89, 175-184.
LUCAS M.S., PERES J.A., 2006, Decolorization of the azo pigment Reactive Black 5 by Fenton and photo-Fenton oxidation, Pigments Pigments, 71, 236-244.
MCKINLEY J.P., ZACHARA J.M., SMITH S.C., TURNER G.D., 1995, The influence of uranyl hydrolysis and multiple site-binding reactions on adsorption of U(VI) to montmorillonite, Clay. Clay Miner. 43, 586-598.
MOGHADDAM S.S., MOGHADDAM M.A., ARAMI M., 2010, Coagulation/flocculation process for pigment removal using sludge from water treatment plant: optimization through response surface methodology, J. Hazard. Mater. 175, 651-657.
NANDI B.K., GOSWAMI A., PURKAIT M.K., 2009, Adsorption characteristics of brilliant green pigment on kaolin, J. Hazard. Mater. 161, 387-395.
OLADIPO A.A., GAZI M., 2014, Enhanced removal of crystal violet by low cost alginate/acid activated bentonite composite beads: optimization and modelling using non-linear regression technique, J. Water Process Eng. 2, 43-52.
POHNDORF R.S., JR T.R.S.C., PINTO L.A.A., 2016, Kinetics and thermodynamics adsorption of carotenoids and chlorophylls in rice bran oil bleaching, J. Food Eng. 185, 9-16.
PAWAR R.R., BAJAJ H.C., LEE S.M., 2016, Activated bentonite as a low-cost adsorbent for the removal of Cu (II) and Pb (II) from aqueous solutions: Batch and column studies, J. Ind. Eng. Chem. 34, 213-223.
PERIASAMY K., NAMASIVAYAM C., 1995, Removal of nickel (II) from aqueous solution and nickel plating industry wastewater using an agricultural waste: peanut hulls, Waste Manage. 15, 63-68.
PARK E.Y., MING H., 2004, Oxidation of rapeseed oil in waste activated bleaching earth and its effect on riboflavin production in culture of Ashbya gossypii, J. Biosci. Bioeng. 97, 59-64.
PURKAIT M.K., DASGUPTA S., DE S., 2006, Micellar enhanced ultrafiltration of eosin pigment using hexadecyl pyridinium chloride, J. Hazard. Mater. 136, 972-977.
RAVIKUMAR K., DEEBIKA B., BALU K., 2005, Decolourization of aqueous pigment solutions by a novel adsorbent: application of statistical designs and surface plots for the optimization and regression analysis, J. Hazard. Mater. 122, 75-83.
SABAH E., 2007, Decolorization of vegetable oils: Chlorophyll-a adsorption by acid-activated sepiolite, J. Colloid Interf. Sci. 310, 1-7.
SU D., XIAO T., GU D., CAO Y., JIN Y., ZHANG W., WU T., 2013, Ultrasonic bleaching of rapeseed oil: effects of bleaching conditions and underlying mechanisms, J. Food Eng. 117, 8-13.
SILVA S.M., SAMPAIO K.A., CERIANI R., VERHÉ R., STEVENS C., DE GREYT W., MEIRELLES A.J., 2013, Adsorption of carotenes and phosphorus from palm oil onto acid activated bleaching earth: Equilibrium, kinetics and thermodynamics, J. Food Eng. 118, 341-349.
SAIDI R., TLILI A., FOURATI A., AMMAR N., OUNIS A., JAMOUSSI F., 2012, Granulometric distribution of natural and flux calcined chert from Ypresian phosphatic series of Gafsa-Metlaoui basin compared to diatomite filter aid, In IOP Conference Series: Materials Science and Engineering (Vol. 28, No. 1, p. 012027), IOP Publishing.
SHARMA P., DAS M.R., 2014, Removal of a cationic pigment from aqueous solution using graphene oxide nanosheets: investigation of adsorption parameters, J. Chem. Eng. Data, 58, 151-158.
TAN I.A.W., AHMAD A.L., HAMEED B.H., 2008, Adsorption of basic pigment on high-surface-area activated carbon prepared from coconut husk: Equilibrium, kinetic and thermodynamic studies, J. Hazard. Mater. 154, 337-346.
WU Z., LI C., 2009, Kinetics and thermodynamics of β-carotene and chlorophyll adsorption onto acid-activated bentonite from Xinjiang in xylene solution, J. Hazard. Mater. 171, 582-587.
WU J.S., LIU C.H., CHU K.H., SUEN S.Y., 2008, Removal of cationic pigment methyl violet 2B from water by cation exchange membranes, J. Membrane Sci. 309, 239-245.
YU H., FUGETSU B., 2010, A novel adsorbent obtained by inserting carbon nanotubes into cavities of diatomite and applications for organic pigment elimination from contaminated water, J. Hazard. Mater. 177, 138-145.
ZHAO Y., XUE Z., WANG X., WANG L., WANG A., 2012, Adsorption of congo red onto ligno-cellulose/montmorillonite nanocomposite, J. Wuhan Univ. Technol. 27, 931-938.
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