Abstract
Methylene blue and rhodamine 6G were used as molecular sensors for the spectrophotometric titrations of the aqueous colloids of clay minerals (montmorillonite, illite and kaolinite). The dyes adsorbed on colloid particles form molecular aggregates, which exhibit spectral properties significantly different from those of dye solutions. Spectrophotometric titrations provide the most sensitive detection of smectites in aqueous colloids (sub-ppm concentrations); and the sensitivity further increases using second derivative spectroscopy. The endpoint of spectrophotometric titrations can be used for the determination of exchange capacity of the mineral in colloids and in this way to estimate its amount. The method is selective only to expandable clays, which was proven by experiments with kaolinite and illite. Spectrophotometric titrations have promising future in the analysis of clays and can be applied in many fields of geology, mineralogy, chemistry, material sciences or in industry. Its application may expand to the analysis of other nanomaterials built from charged particles and exhibiting metachromasy in the systems with organic dyes.
Similar content being viewed by others
References
Arbeloa FL, Arbeloa TL, Arbeloa IL (1997) Spectroscopy of rhodamine 6G adsorbed on sepiolite aqueous suspensions. J Colloid Interface Sci 187(1):105–112
Bergmann K, O’Konski CT (1963) A spectroscopic study of methylene blue monomer, dimer, and complexes with montmorillonite. J Phys Chem 67(10):2169–2177
Bujdák J (2006) Effect of the layer charge of clay minerals on optical properties of organic dyes. A review. Appl Clay Sci 34(1–4):58–73. doi:10.1016/j.clay.2006.02.011
Bujdák J, Iyi N (2006) Molecular aggregation of rhodamine dyes in dispersions of layered silicates: influence of dye molecular structure and silicate properties. J Phys Chem B 110(5):2180–2186. doi:10.1021/jp0553378
Bujdák J, Komadel P (1997) Interaction of methylene blue with reduced charge montmorillonite. J Phys Chem B 101(44):9065–9068
Bujdák J, Iyi N, Fujita T (2002) The aggregation of methylene blue in montmorillonite dispersions. Clay Miner 37(1):121–133. doi:10.1180/0009855023710022
Bujdák J, Iyi N, Sasai R (2004) Spectral properties, formation of dye molecular aggregates, and reactions in rhodamine 6G/layered silicate dispersions. J Phys Chem B 108(14):4470–4477. doi:10.1021/jp037607x
Czímerová A, Bujdák J, Dohrmann R (2006) Traditional and novel methods for estimating the layer charge of smectites. Appl Clay Sci 34(1–4):2–13. doi:10.1016/j.clay.2006.02.008
Estevez MJT, Arbeloa FL, Arbeloa TL, Arbeloa IL (1993) Absorption and fluorescence properties of rhodamine 6G adsorbed on aqueous suspensions of Wyoming montmorillonite. Langmuir 9(12):3629–3634
Grauer Z, Malter AB, Yariv S, Avnir D (1987) Sorption of rhodamine B by montmorillonite and laponite. Colloids Surf 25(1):41–65
Jaboyedoff M, Thelin P (2002) PATISSIER: software to estimate the smectite content and number of consecutive illite layers in mixed-layer illite-smectite using illite crystallinity data. Schweiz Miner Petrogr Mitt 82(2):221–228
Janik LJ, Skjemstad JO (1995) Characterization and analysis of soils using midinfrared partial least-squares. 2. Correlations with some laboratory data. Aust J Soil Res 33(4):637–650. doi:10.1071/sr9950637
Kaufhold S, Penner D (2006) Applicability of the SER method for quality control of clays from the German ‘Westerwald’. Appl Clay Sci 32(1–2):53–63. doi:10.1016/j.clay.2005.09.008
Kugel RW (1993) Metachromasy—the interactions between dyes and polyelectrolytes in aqueous solutions. Adv Chem Ser 236:507–533
Latterini L, Nocchetti M, Aloisi GG, Costantino U, Elisei F (2007) Organized chromophores in layered inorganic matrices. Inorg Chim Acta 360(3):728–740. doi:10.1016/j.ica.2006.07.048
Li HY, Li QA (2003) Organic dye-layered silicate optical functional nanocomposites. Prog Chem 15(2):135–140
Madejová J, Kečkés J, Pálková H, Komadel P (2002) Identification of components in smectite/kaolinite mixtures. Clay Miner 37(2):377–388. doi:10.1180/0009855023720042
Nieto F, Abad I, Azanon JM (2008) Smectite quantification in sediments and soils by thermogravimetric analyses. Appl Clay Sci 38(3–4):288–296. doi:10.1016/j.clay.2007.04.001
Penner D, Lagaly G (2000) Influence of organic and inorganic salts on the coagulation of montmorillonite dispersions. Clays Clay Miner 48(2):246–255
Pentrák M, Madejová J, Komadel P (2009) Acid and alkali treatment of kaolins. Clay Miner 44(4):511–523. doi:10.1180/claymin.2009.044.4.511
Pentrák M, Madejová J, Komadel P (2010) Effect of chemical composition and swelling on acid dissolution of 2:1 clay minerals. Philos Mag 90(17–18):2387–2397. doi:10.1080/14786430903559433
Salleres S, Arbeloa FL, Martinez V, Corcostegui C, Arbeloa IL (2009) Effect of surfactant C12TMA molecules on the self-association of R6G dye in thin films of laponite clay. Mater Chem Phys 116(2–3):550–556. doi:10.1016/j.matchemphys.2009.04.030
Schoonheydt RA, Heughebaert L (1992) Clay adsorbed dyes—methylene blue on laponite. Clay Miner 27(1):91–100
Schroth BK, Sposito G (1997) Surface charge properties of kaolinite. Clays Clay Miner 45(1):85–91
Srodon J (2009) Quantification of illite and smectite and their layer charges in sandstones and shales from shallow burial depth. Clay Miner 44(4):421–434. doi:10.1180/claymin.2009.044.4.421
Srodon J, McCarty DK (2008) Surface area and layer charge of smectite from CEC and EGME/H2O-retention measurements. Clays Clay Miner 56(2):155–174. doi:10.1346/ccmn.2008.0560203
Šucha V, Czímerová A, Bujdák J (2009) Surface properties of illite-smectite minerals as detected by interaction with rhodamine 6G dye. Clays Clay Miner 57(3):361–370. doi:10.1346/ccmn.2009.0570308
Takagi K, Sawaki Y (1993) Photochemical-reactions in organized and semiorganized media. Crit Rev Biochem Mol Biol 28(4):323–367
Acknowledgments
The authors would like to thank to Grant Agency VEGA (Project 02/0089/09) for financial support. This publication is the result of the project implementation “Amplification of the Centre of Excellence on Green Chemistry Methods and Processes (CEGreenII)” supported by the Research & Development Operational Program funded by the ERDF.
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Lofaj, M., Bujdák, J. Detection of smectites in ppm and sub-ppm concentrations using dye molecule sensors. Phys Chem Minerals 39, 227–237 (2012). https://doi.org/10.1007/s00269-011-0478-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00269-011-0478-4