Lithium ion recovery from brine using granulated polyacrylamide–MnO2 ion-sieve》.pdfVIP

Chemical Engineering Journal 279 (2015) 659–666 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: www.else /locate/cej Lithium ion recovery from brine using granulated polyacrylamide–MnO2 ion-sieve Jia-Li Xiao, Shu-Ying Sun ⇑, Xingfu Song, Ping Li ⇑, Jian-Guo Yu State Key Laboratory of Chemical Engineering, National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai 200237, China h i g h l i g h t s PAM is taken as the binder material, and the granulation does not affect Li+ uptake capacities and rate. The granulated ion-sieve has a high stability. The maximum Li+ concentration in the eluant is 13.74 times higher than that in the feed solution. A mathematical model was built to calculate the film and pore diffusion coefficients. a r t i c l e i n f o a b s t r a c t Article history: The granulated polyacrylamide (PAM)–MnO2 ion-sieve with 0.3–0.7 mm diameter was prepared Received 11 March 2015 using the inverse suspension polymerization method, where the precursor was the Li Mn O 4 5 12 Received in revised form 22 May 2015 ultrafine powder synthesized in our laboratory, the binder was acrylamide, the cross-linker was Accepted 23 May 2015 0