Interface-Engineered Nanohybrid Membranes for Selective Boron Removal from Brackish Water and Seawater Reverse Osmosis Permeate
National University of Singapore · Tongji University · +5 more institutions
Abstract
Conventional reverse osmosis (RO) membranes have poor boron rejection at neutral pH due to the small size and neutrality of boric acid. To overcome this issue, we have developed a nanoconfined transport layer by coassembling cyclodextrin-MOF and exfoliated LDH nanosheets within the polyamide layer. Cyclodextrin-MOF offers adsorption sites and steric hindrance that temporarily retain boron species, while single-layer LDH forms hydrophilic channels for fast water transport, together creating a dual-channel mechanism for efficient boron-water separation. The optimized membrane has a boron rejection of 82.24% and a NaCl rejection of 99.27% using a feed containing 5 ppm of boron and 2,000 ppm of NaCl. In addition,…
Citation impact
- FWCI
- 151.05
- Percentile
- 100%
- References
- 50
Authors
7- SZSidi Zhu
National University of Singapore
- QZQipeng Zhao
Tongji University, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security
- YCYexiang Chen
Zhejiang Chinese Medical University, The Third Affiliated Hospital of Zhejiang Chinese Medical University
- MSMohammad Shahnawaz Khan
National University of Singapore
- CCChia-Ming Chang
National University of Singapore
Topics & keywords
- Boron
- Membrane
- Boric acid
- Reverse osmosis
- Permeation
- Seawater
- Adsorption
- Brackish water
- Life below water