Title: ADSORBENTS FOR IRON REMOVAL OBTAINED FROM VERMICULITE
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Authors: Wegrzyn Agnieszka, Chmielarz Lucjan, Zjezdzałka Paweł, Kowalczyk Andrzej, Jablońska Magdalena, Tolosa Xavier Baldrich and Michalik Marek
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DOI: 10.13168/AGG.2013.0034
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Journal: Acta Geodynamica et Geomaterialia, Vol. 10, No. 3 (171), Prague 2013
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Full Text:  PDF file (0.7 MB)
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Keywords: vermiculite, acid treatment, iron removal, adsorption
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| Abstract: In presented work, raw, expanded and acid treated vermiculites were used as low-cost and active adsorbents for reducing of
environmental pollution with heavy metals. Acid treatment was performed at elevated temperature (95°C) for 2 and 24 h in
solution of HNO3. Adsorption capacity towards Fe3+ was studied in column, semi-batch and batch mode. It was shown that all
samples are effective in removal of heavy metals; however adsorption mechanism is based not only on ion exchange of
interlayer cations but also precipitation/deposition processes. Starting material and modified samples as well as spent
adsorbents were characterized with respect to the vermiculite structure using X-ray diffraction method. |
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Acta Geodynamica et Geomaterialia 
