title: Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant.
abstract: In this study, organozeolites were prepared by treatment of the natural zeolites (clinoptilolite and phillipsite) with cetylpyridinium chloride (CP) equivalent to 50 and 100% of their external cation exchange capacities (ECEC). Organoclinoptilolites (ZCPs) and organophillipsites (PCPs) were characterized by FTIR spectroscopy, thermal analysis, determination of the point of zero charge and zeta potential. Adsorption of zearalenone (ZEN) by ZCPs and PCPs at pH 3 and 7 was investigated. Results showed that adsorption of ZEN increases with increasing amounts of CP at the zeolitic surfaces for both ZCPs and PCPs but the adsorption mechanism was different. Adsorption of ZEN by ZCPs followed a linear type of isotherm at pH 3 and 7 while ZEN adsorption by PCPs showed non linear (Langmuir and Freundlich) type of isotherm at both pH values. Different interactions between the ZEN molecule (or ion) and ZCPs and PCPs occurred: partition (linear isotherms) and adsorption in addition to partition (non linear isotherms), respectively. For the highest level of organic phase at the zeolitic surfaces, the maximum adsorbed amount of ZEN was 5.73mg/g for organoclinoptilolite and 6.86mg/g for organophillipsite at pH 3. Slightly higher adsorption: 6.98mg/g for organoclinoptilolite and 7.54mg/g for organophillipsite was achieved at pH 7. The results confirmed that CP ions at both zeolitic surfaces are responsible for ZEN adsorption and that organophillipsites are as effective in ZEN adsorption as organoclinoptilolites.
authors.affiliation: Institute for Technology of Nuclear and Other Mineral Raw Materials, Franše d' Epere 86, 11000 Belgrade, Serbia. Electronic address: m.markovic@itnms.ac.rs.
authors.forename: Marija
authors.initials: M
authors.lastname: Marković
authors.affiliation: Institute for Technology of Nuclear and Other Mineral Raw Materials, Franše d' Epere 86, 11000 Belgrade, Serbia.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Daković
authors.affiliation: Veterinary Medical Diagnostic Laboratory, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA.
authors.forename: George E
authors.initials: GE
authors.lastname: Rottinghaus
authors.affiliation: Institute for Technology of Nuclear and Other Mineral Raw Materials, Franše d' Epere 86, 11000 Belgrade, Serbia.
authors.forename: Milan
authors.initials: M
authors.lastname: Kragović
authors.affiliation: Institute for Technology of Nuclear and Other Mineral Raw Materials, Franše d' Epere 86, 11000 Belgrade, Serbia.
authors.forename: Anđela
authors.initials: A
authors.lastname: Petković
authors.affiliation: Department of Pharmaceutical Technology and Cosmetology, University of Belgrade, Faculty of Pharmacy, Vojvode Stepe 450, 11221 Belgrade, Serbia.
authors.forename: Danina
authors.initials: D
authors.lastname: Krajišnik
authors.affiliation: Department of Pharmaceutical Technology and Cosmetology, University of Belgrade, Faculty of Pharmacy, Vojvode Stepe 450, 11221 Belgrade, Serbia.
authors.forename: Jela
authors.initials: J
authors.lastname: Milić
authors.affiliation: Department of Science and Technologies, University of Sannio, Via dei Mulini 59/A, 82100 Benevento, Italy.
authors.forename: Mariano
authors.initials: M
authors.lastname: Mercurio
authors.affiliation: Department of Chemical, Materials and Industrial Production Engineering, Federico II University, Piazzale V. Tecchio, 80, 80125 Naples, Italy.
authors.forename: Bruno
authors.initials: B
authors.lastname: de Gennaro
mesh_terms: D000327:Adsorption; D000818:Animals; D002594:Cetylpyridinium / Q000737:chemistry*; D006358:Hot Temperature; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007477:Ions; D016014:Linear Models; D009183:Mycotoxins / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry; D015025:Zearalenone / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D007477:Ions; D009183:Mycotoxins; D013501:Surface-Active Agents; C061947:phillipsite; D017641:Zeolites; D015025:Zearalenone; D002594:Cetylpyridinium
keywords: Adsorption; Clinoptilolite; Mycotoxins; Phillipsite; Surfactants; Zearalenone