封面图片
2022年, 第16卷 第5期
(Rongzhen Chen, Xinfei Dong, Qingchun Ge, pp. 755–763)
As draw solute is the core element of forward osmosis (FO), here Li-Bet-Tf2N synthesized from a customized ionic liquid betainium bis(triflfluoromethylsulfonyl)imide ([Hbet][Tf2N]) and Li2CO3 recovered from lithium-ion battery (LIB) wastes is proposed as a draw solute to treat Li+-containing wastewater from LIB manufacturing through FO filtration. Li-Bet-Tf2N generates a sufficiently high osmotic pressure to drive the FO separation efficiently. Li-Bet-Tf2N produces a water flux of 21.3 L·m−2·h−1 at 1.0 mol∙L‒1 against deionized water, surpassing conventional NaCl and MgCl2 draw solutes with higher water recovery efficiency. Moreover, Li-Bet-Tf2N induces higher water permeation flux with a 10.0% water flux decline than NaCl and MgCl2 for which the water flux decline 16.7% and 16.4%, respectively, in treating 2000 mg∙L‒1 Li+-containing wastewater for 12 h. Remarkably, unlike other draw solutes which require intensive energy input in recycling, Li-Bet-Tf2N is easily separated from water via solvent extraction. Li-Bet-Tf2N thus demonstrates a novel class of draw solute with great potentials to treat wastewater economically. [展开] ...
ISSN 2095-0179 (Print)
ISSN 2095-0187 (Online)
CN 11-5981/TQ
Postal Subscription Code 80-969 Formerly Known as Frontiers of Chemical Science and Engineering in China 2018 Impact Factor: 2.809