Determination conditions of electrochemical removal phosphate ions from wash solutions obtained during processing of alunites from the Zaglig deposit

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This article studies the process of electrochemical removal of phosphate ions from wash solutions formed in aluminum production. A distinctive feature of these solutions is the presence, in addition to phosphate ions (up to 1.7 g/l), of a significant amount of aluminum up to 47 g/l in the form of [Al(OH)4]–. The effect of the operating parameters (initial pH, process time (τ), initial concentration of phosphate ions, distance between electrodes and current density) of the electrocoagulation process using aluminum electrodes on the efficiency of phosphate ion removal was studied. It was shown that as a result of electrochemical dissolution of the aluminum anode and hydrolysis of the Al3+ ion, an amorphous precipitate of aluminum hydroxide is formed in the solution. It was found that electrolysis of the solution with an Al anode at J = 10 mA/sm2 leads to the removal of phosphate ions by over 90%. The electrocoagulation product was characterized by SEM/EDS analysis. The influence of possible impurities (SO42–, PO43–, F–, Cl–, VO43–) in washing solutions obtained during alunite processing on the degree of phosphate ion removal was estimated.

 

作者简介

A. Geidarov

Institute of Catalysis and Inorganic Chemistry named after academic M. Nagiyev

编辑信件的主要联系方式.
Email: arif.heyderov.54@mail.ru
Baku

P. Babaeva

Institute of Catalysis and Inorganic Chemistry named after academic M. Nagiyev

Email: arif.heyderov.54@mail.ru
Baku

D. Mehmet

Firat University

Email: arif.heyderov.54@mail.ru
Elazig, Turkey

G. Alyshanly

Institute of Catalysis and Inorganic Chemistry named after academic M. Nagiyev

Email: arif.heyderov.54@mail.ru
Baku

S. Jafarova

Institute of Catalysis and Inorganic Chemistry named after academic M. Nagiyev

Email: arif.heyderov.54@mail.ru
Baku

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