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Highly-efficient removal of Pb(ii), Cu(ii) and Cd(ii) from water by novel lithium, sodium and potassium titanate reusable microrods

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    0522630 - ÚACH 2021 RIV GB eng J - Journal Article
    Motlochová, Monika - Slovák, V. - Pližingrová, Eva - Lidin, S. - Šubrt, Jan
    Highly-efficient removal of Pb(ii), Cu(ii) and Cd(ii) from water by novel lithium, sodium and potassium titanate reusable microrods.
    RSC Advances. Roč. 10, č. 7 (2020), s. 3694-3704. E-ISSN 2046-2069
    R&D Projects: GA MŠk(CZ) LM2015073; GA TA ČR(CZ) TJ01000154
    Institutional support: RVO:61388980
    Keywords : heavy-metal ions * thermal-decomposition * sorption properties * aqueous-solution * nanotubes * nanoparticles
    Subject RIV: CA - Inorganic Chemistry
    OBOR OECD: Inorganic and nuclear chemistry
    Impact factor: 3.361, year: 2020
    http://hdl.handle.net/11104/0307096

    In this work, we report on the efficient removal of heavy metal ions with nanostructured lithium, sodium and potassium titanates from simulated wastewater. The titanates were obtained via a fast, easy and cost effective process based on extraction of sulfate ions from the crystals of titanyl sulfate and their replacement with hydroxyl groups of NaOH, LiOH and KOH solutions leaving the Ti-O framework intact. The as-prepared titanates were carefully examined by scanning and transmission electron microscopy. Furthermore, the effect of contact time, pH, annealing temperature, together with adsorption in real conditions including competitive adsorption and reusability were studied. It was found that the maximum adsorption capacity, as calculated from the Langmuir adsorption model, is up to 3.8 mmol Pb(ii) per g, 3.6 mmol Cu(ii) per g and 2.3 mmol Cd(ii) per g. Based on the characterization results, a possible mechanism for heavy metal removal was proposed. This work provides a very efficient, fast and convenient approach for exploring promising materials for water treatment.
    Permanent Link: http://hdl.handle.net/11104/0307096
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