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Effect of Acid Modification on Porous Structure and Adsorption Properties of Different Type Ukrainian Clays for Water Purification Technologies

Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Clay minerals, as adsorbents, are widely available, have large specific surface area, and the ability for cation exchange, which makes them applicable in wastewater treatment from heavy metal ions. This study investigated the effect of acid modification on the porous structure and adsorption properties of montmorillonite (MMT) and palygorskite (PAL) clays of the Cherkasy deposit (Ukraine). Acid modification of clay samples was carried out with chloride acid after preliminary refining. Clay particles were analyzed using optical polarization microscopy with recording of digital images of the study. The area and perimeter of individual particles of clay samples were determined. The equivalent diameter and shape factor were calculated. The porosity characteristics of the samples were determined. Pore surface area was calculated by the Brunauer-Emmette-Teller (BET) method. Total volume, mean diameters, and pore size distribution were obtained using the Density Functional Theory (BFT) method. Acid modification improved the porous structure of clay samples. BET surface area of the pores of the initial sample of palygorskite clay is significantly higher compared to the montmorillonite type clay (140.66 and 83.61 m2/g, respectively). Acid modification of the PAL sample contributes to an increase in the BET surface area by approximately 1.7 times. Acid modification increases the surface area and total pore volume by approximately 2.3 times for MMT samples and 1.76 times for PAL samples. Dimensional characteristics of the pores of the MMT sample were to shift after activation, while for the PAL sample, their average size increases sharply by approximately 3.2 times. This suggested the additional formation of pores in the interfibrillar regions of the PAL sample during its acid activation. The effect of acid modification on the sorption capacity was investigated by means of methylene blue exhaustion. Sorption efficiency increases by 6-14%, compared to unmodified samples and is determined by the contact time and the type of clay. Increasing the contact time from 24 to 72 hours leads to an increase in the sorption efficiency of activated MMT and PAL samples by 36 and 30%, respectively. Acid-activated clay minerals, in particular montmorillonite, can be used as part of sorption elements to increase the efficiency of wastewater treatment technologies from heavy metal ions.
Rocznik
Strony
210--221
Opis fizyczny
Bibliogr. 40 poz., rys., tab.
Twórcy
autor
  • Department of Chemical Technologies and Resource Saving, Kyiv National University of Technologies and Design, 2, Nemirovich-Danchenko Str., Kyiv 01011, Ukraine
  • Department of Chemical Technologies and Resource Saving, Kyiv National University of Technologies and Design, 2, Nemirovich-Danchenko Str., Kyiv 01011, Ukraine
  • Department of Chemical Technologies and Resource Saving, Kyiv National University of Technologies and Design, 2, Nemirovich-Danchenko Str., Kyiv 01011, Ukraine
  • Department of General and Inorganic Chemistry, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37, Peremohy Av., Kyiv, 03056, Ukraine
  • Department of Chemical Technologies and Resource Saving, Kyiv National University of Technologies and Design, 2, Nemirovich-Danchenko Str., Kyiv 01011, Ukraine
  • Department of Chemical Technologies and Resource Saving, Kyiv National University of Technologies and Design, 2, Nemirovich-Danchenko Str., Kyiv 01011, Ukraine
Bibliografia
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  • 7. Ashiq, A., Sarkar, B., Adassooriya, N., Walpita, J., Rajapaksha, A.U., Ok, Y.S., Vithanage, M. 2019. Sorption process of municipal solid waste biochar-montmorillonite composite for ciprofloxacin removal in aqueous media. Chemosphere, 236, 124384.
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  • 23. Kadoshnikov, V.M., Shekhunova, S.B., Zadvernyuk, H.P., Manichev, V.I. 2013. Authigenic minerals in the bentonite clay of Cherkassy deposit. Mineral. Journ. (Ukraine), 35(3), 54–60.
  • 24. Kausar, A., Iqbal, M., Javed, A., Aftab, K., Bhatti, H.N., Nouren, S. 2018. Dyes adsorption using clay and modified clay: a review. Journal of Molecular Liquids, 256, 395–407.
  • 25. Komadel, P., Madejová, J. 2006. Acid activation of clay minerals. Developments in clay science, 1, 263–287.
  • 26. Lima, J.C., Costa, A.R.M., Sousa, J.C., Arruda, S.A., Almeida, Y.M. 2021. Thermal behavior of polyethylene terephthalate/organoclay nanocomposites: investigating copolymers as matrices. Polymer Composites, 42(2), 849–864.
  • 27. Masindi, V., Ramakokovhu, M.M. 2021. The performance of thermally activated and vibratory ball milled South African bentonite clay for the removal of chromium ions from aqueous solution. Materials Today: Proceedings, 38, 964–974.
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  • 33. Sarkar, B., Rusmin, R., Ugochukwu, U.C., Mukhopadhyay, R., Manjaiah, K.M. 2019. Modified clay minerals for environmental applications. In Modified clay and zeolite nanocomposite materials. Elsevier, 113–127.
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  • 36. Tadesse, S.H. 2022. Application of Ethiopian bentonite for water treatment containing zinc. Emerging Contaminants, 8, 113–122.
  • 37. Toor, M., Jin, B. 2012. Adsorption characteristics, isotherm, kinetics, and diffusion of modified natural bentonite for removing diazo dye. Chemical Engineering Journal, 187, 79–88.
  • 38. Uddin, M.K. 2017. A review on the adsorption of heavy metals by clay minerals, with special focus on the past decade. Chemical Engineering Journal, 308, 438–462.
  • 39. Zaghouane-Boudiaf, H., Boutahala, M., Sahnoun, S., Tiar, C., Gomri, F. 2014. Adsorption characteristics, isotherm, kinetics, and diffusion of modified natural bentonite for removing the 2, 4, 5-trichlorophenol. Applied clay science, 90, 81–87.
  • 40. Zhu, J., Zhang, P., Wang, Y., Wen, K., Su, X., Zhu, R., Xi, Y. 2018. Effect of acid activation of palygorskite on their toluene adsorption behaviors. Applied Clay Science, 159, 60–67.
Uwagi
Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-e9afc605-b81e-43b5-a2c8-4b0bbff5d95d
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