PRELIMINARY ASSESSMENT OF MODIFIED KAZAKH NATURAL ZEOLITES AS POSSIBLE SORBENTS FOR MnO4- REMOVAL FROM AQUEOUS SOLUTIONS
DOI:
https://doi.org/10.24193/subbchem.2018.4.15Keywords:
Kazakh zeolite, chemical surface modification, permanganate adsorptionAbstract
A natural zeolite of Kazakh origin, as well as its three different types of chemically modified versions, were assessed from the point of view of permanganate removal yield from aqueous solutions. Modification was carried out by means of di-dodecyl-dimethyl-ammonium bromide surfactant treatment type (1). Types (2) and (3) were treated prior to DDAB wth HCl or NaCl, respectively. All sorbents display broad ranges of particle size distribution. Modification of the natural form enhances the specific surface as well as the pore volume, yet influences not in the same way the sorption yield. The process is slow, however, short- and long-term effectiveness are affected by preparation procedures. The most promising yield is exhibited by the natural zeolite that was subject to a combined acid - surfactant treatment.
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