Nguyen, D., Pham, Q. and Tran, T. 2016. Apply modified cotton by m-DMDHEU and choline cloride to separate ion CrO4 2- , H2AsO4 - in water solution. Science and Technology Development Journal. 19, 3 (Sep. 2016), 62-69. DOI:https://doi.org/https://doi.org/10.32508/stdj.v19i3.521.