TITLE:
Application of Carbon Dioxide and Polyacrylamide in Extracting Magnesium from Brine by Precipitation Method
AUTHORS:
Haiyan Hu, Lin Zhou, Qingguo Chen
KEYWORDS:
Magnesium Element, Desalination Brine, Reverse Osmosis
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.4 No.7,
July
30,
2016
ABSTRACT: In this paper, carbon dioxide and polyacrylamide were used to improve the method to abstract magnesium from desalination brine. Experimental results showed that calcium ion in the desali-nation brine can be effectively removed using carbon dioxide, which thereby improves the purity and reaction efficiency of the magnesium hydrate precipitate. 0.1% - 0.2% PAM could help to promote the precipitation of magnesium hydrate colloid. And when hydroxyl anion was between 110% - 130% of theoretical amount, yield of magnesium hydrate exceeds 70% at standing time of 60 hours.