18-22 RECICLAREA APELOR UZATE INDUSTRIAL, CU CONłINUT DE METALE GRELE, PRIN SCHIMB IONIC
RECYCLING INDUSTRIAL WASTEWATER WITH HEAVY
METAL CONTAIN BY ION EXCHANGE
Removing heavy metal ions from industrial wastewater by ion
exchange is based on the properties of the ion – cationic exchanger to change
their own captions with those from the wastewater. The purification technology
by ion exchange consists of replacing the polluting ion from the used water with
another ion, which is much less polluted, or which results in obtaining an
insoluble chemical compound or one that is easier to remove. The ion
exchange between the zeolite and the heavy metal ions is a type of adsorption
-chemical reaction – denuding, and the transfer through the zeolite pores
determines the process. The process is favorite by temperature increase, by pH
increase of the solution from the wastewater, the heavy metal ion concentration
increase of the initial solution, the quantitative increase of the volcanic tuff.
Cuvinte cheie: ape uzate, schimb ionic, zeoliŃi