Removal Efficiency and Influence Factors of Bromide in Water by MIEX
CHEN Wei,CAO Zhe,LIU Cheng and WANG Man
DOI:10.11835/j.issn.1674-4764.2012.03.023
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2012,Pages 133-137
- Abstract
Jar tests were used to study the removal efficiency and influence factors caused by common anions and organic compounds of bromide in water by a new magnetic ion exchange resin (MIEX). The results show that MIEX can remove bromide in pure water effectively. The removal rates of bromide by MIEX are all over 90% when the equilibrium time of ion exchange reaction between MIEX and bromide is 5 min and 3 min and the dosage is 10 mL/L and 20 mL/L, respectively. Even containing other common negatively charged matter which has inhibitory effect to some extent, the removal rates reach 50%. Anionic content and the selectivity of MIEX are the main influence factors to reduce bromide in water by MIEX. The existence of organic compounds decreases the removal rate of bromide in water by MIEX, which is approximately 70%. There are differences between anions and organic compounds in removal processes by MIEX. The equilibrium time of ion exchange reaction removing anions is about 5 min, while it takes over 20 min to remove organic compounds measured with UV 254 and DOC, respectively by MIEX with the dosage of 10 mL/L.