Citation: Ningning Gao, Yue Zhang, Zhenhao Yang, Lijing Xu, Kongyin Zhao, Qingping Xin, Junkui Gao, Junjun Shi, Jin Zhong, Huiguo Wang. Ba²⁺/Ca²⁺ co-crosslinked alginate hydrogel filtration membrane with high strength, high flux and stability for dye/salt separation[J]. Chinese Chemical Letters, ;2024, 35(5): 108820. doi: 10.1016/j.cclet.2023.108820 shu

Ba²⁺/Ca²⁺ co-crosslinked alginate hydrogel filtration membrane with high strength, high flux and stability for dye/salt separation

Ningning Gao ^a ,
Yue Zhang ^b ,
Zhenhao Yang ^b ,
Lijing Xu ^b ,
Kongyin Zhao ^{b, *,} ,
Qingping Xin ^b ,
Junkui Gao ^a ,
Junjun Shi ^a ,
Jin Zhong ^a ,
Huiguo Wang ^{a, *,}

a.
SINOPEC Research Institute of Petroleum Processing CO., LTD., Beijing 100083, China
b.
State Key Laboratory of Separation Membranes and Membrane Processes/National Centre for International Joint Research on Separation Membranes, Tiangong University, Tianjin 300387, China

zhaokongyin@tjpu.edu.cn

wanghg.ripp@sinopec.com

Received Date: 16 November 2022
Revised Date: 9 July 2023
Accepted Date: 16 July 2023
Available Online: 20 July 2023

Figures(4)

Alginate is a natural polysaccharide polymer. Hydrogel filtration membranes prepared from alginate show excellent fouling resistance and controllable separation performance, but poor mechanical properties limit the use of algae hydrogels. In this study, Ba²⁺/Ca²⁺ co-crosslinked alginate (Ba/CaAlg) hydrogel membrane was prepared by cross-linking sodium alginate with a blend aqueous solution of barium ions and calcium ions, and the membrane was applied to the separation of dyes/salts from dyeing wastewater. Compared with the CaAlg membrane, the Ba/CaAlg hydrogel membrane exhibited more stable structure, and the mechanical properties and salt tolerance of the membrane were significantly improved. The flux of Ba/CaAlg membrane for methyl blue/sodium chloride mixed solution reached 43.5 L m⁻² h⁻¹, which was significantly higher than that of CaAlg membrane. Besides, the Ba/CaAlg membrane showed higher dye rejection (>99.6%) and lower salt rejection (<8.2%). The structure of Ba/CaAlg membrane was preliminarily simulated by molecular dynamics, and the pore size and distribution of the membrane were calculated. The Ba/CaAlg membrane has a broad application prospect in dyes/salts separation.
- Alginate,
- Filtration membrane,
- Ba²⁺/Ca²⁺ ion crosslinking,
- Dye/salt separation,
- Molecular dynamic simulation,
- Hydrogel
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Ba2+/Ca2+ co-crosslinked alginate hydrogel filtration membrane with high strength, high flux and stability for dye/salt separation

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通讯作者: 陈斌, bchen63@163.com

Ba²⁺/Ca²⁺ co-crosslinked alginate hydrogel filtration membrane with high strength, high flux and stability for dye/salt separation