Na+ - NH4+ CATION EXCHANGE STUDY ON TREATED ZEOLITIC VOLCANIC TUFF IN FIXED BED COLUMN
DOI:
https://doi.org/10.24193/subbchem.2020.3.07Keywords:
zeolitic volcanic tuff, clinoptilolite, ammonium, ion exchange, column, wastewaterAbstract
In this work, Na+ - NH4+ cation exchange process was studied on various samples of treated zeolitic volcanic tuff (ZVT). Irrespective of the treatment applied (washing, NaCl, acid, thermal), the Na+ concentration evolution closely mirrors the NH4+ concentration evolution indicating that Na+ - NH4+ is the main ion exchange process that takes place. Cation exchange capacities (CEC) between 5.42 and 33.8 mg NH4+/g were obtained suggesting that not all treatments improved the ZVT’s abilities to remove ammonium from wastewater. Changes in flow rate, Na+ concentration, NH4+ concentration, ZVT amount, and ZVT grain size have all influenced the CEC in the considered system.
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