文献类型： 外文期刊
作者： Fei, Jingyuan 1 ; Sun, Weiliang 2 ; Li, Hongna 3 ; Mo, Zijing 4 ; She, Qianhong 4 ; Yang, Xuejing 5 ; Huang, Taobo 1 ; Fang, Mingliang 1 ; Wang, Zimeng 1 ; Snow, Samuel D. 2 ; Zhu, Xiuping 1 ;
作者机构： 1.Fudan Univ, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China
2.Louisiana State Univ, Dept Civil & Environm Engn, Baton Rouge, LA 70803 USA
3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
4.Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore
5.East China Univ Sci & Technol ECUST, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China
关键词： hydrogels; desalination; ammonia; stability; mechanism
期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：11.3； 五年影响因子：12.4 ）
ISSN： 0013-936X
年卷期： 2025 年 59 卷 23 期
页码：
收录情况： SCI
摘要： Water scarcity is a growing global challenge. Developing energy-efficient and sustainable desalination methods is crucial to addressing the global water crisis. In recent years, hydrogel-based desalination has emerged as a promising approach due to the excellent water absorption capacity and stimuli-responsive properties of hydrogels. However, conventional dewatering methods for recovering water from hydrogels often suffer from low efficiency and poor stability. To address these challenges, a novel approach using ammonia gas to dewater poly(acrylic acid-co-acrylamide) hydrogels was investigated, achieving significantly higher dewatering rates (up to 110 gH2O/g hydrogel/h), among the highest reported, with water production rates ranging from 600 to 1140 LH2O/kghydrogel/day and an average salt rejection of around 60% for both synthetic and real seawater water. The process also demonstrated excellent stability, maintaining a consistent performance over 100 cycles. This technology shows great potential for desalinating brackish water for agricultural irrigation or integration with reverse osmosis systems for seawater desalination, significantly reducing energy consumption and capital costs. This innovative dewatering method could enable practical applications of hydrogel-based desalination.
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