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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| Authors: | Monika Motlochová ,Vá clav Slová k,Eva Pliž ingrová ,Sven Lidin,Jan Š ubrt |
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| Affiliation: | Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, CZ-250 68 Řež Czech Republic.; Centre for Analysis and Synthesis, Lunds Universitet, Naturvetarvägen 14, Lund 222-61 Sweden ; Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava CZ-701 30 Czech Republic |
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| Abstract: | 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.This work provides a very efficient, fast and convenient approach for exploring promising materials for water treatment. |
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