Abstract
The soda ash industry is a part of the chemical industry, which is responsible for the production of sodium carbonate, calcium chloride, absorbent masses, evaporated wet salt, food salt, pickling salt or salt tablets. During manufacturing of those products, strongly alkaline wastewater is generated. It could be characterised by a high electrolytic conductivity and concentration of ions: chlorides, sulfates, phosphates, calcium, sodium, magnesium, potassium and ammonium. The aim of the research was to test the effectiveness of removing sodium, potassium, calcium, magnesium and ammonium from wastewater after production of soda ash by three sorbents: Halosorb, Compakt and Damsorb K. The process was carried out using dynamic method with different flow of wastewater through the column with sorbent. It allowed to reduce concentrations of all cations tested. Moreover, it was found that sorbent type did not significantly affect the removal of any of the ions, but the deposit load had significant impact on the removal of all ions tested.
Highlights
Results published in the scientific literature refer to the reduction of magnesium concentration by 60–80% when using nanofiltration12,19 and by over 98% with the use of reverse osmosis17,19,25
Removal of sodium and ammonium ion is most effective at the loads of deposit 0.969 m3 ∙ m−2 ∙ h−1 and 1.937
Concentration of magnesium is most effectively reduced at the deposit loads 1.628 m3 ∙ m−2 ∙ h−1 and 0.579
Summary
The aim of the research was to test the effectiveness of removing sodium, potassium, calcium, magnesium and ammonium from wastewater after production of soda ash by three sorbents: Halosorb, Compakt and Damsorb K. The aim of the research was to evaluate the effectiveness of removing selected cations from wastewater after production of soda ash in the sorption process
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