A study on the modified hydrotalcite composite nanofiltration membrane for dye/salt separation |
Authors: TIAN Chen, ZHU Liping, FENG Xiaoquan, SHAN Meixia, ZHANG Yatao |
Units: 1School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001 China; 2 Zhengzhou Key Laboratory of Advanced Separation Technology, Zhengzhou 450001 China |
KeyWords: LDH, LDH-PSS, Composite nanofiltration membrane, Dye rejection, Desalination |
ClassificationCode:TQ051.893 |
year,volume(issue):pagination: 2021,41(2):33-40 |
Abstract: |
The hydrotalcite (LDH) was prepared by low saturated coprecipitation. Sodium p-styrene sulfonate (PSS) was then grafted onto the surface of hydrotalcite lamella by reverse atomic transfer radical polymerization (RATRP) to prepare LDH-PSS. Finally, LDH/LDH-PSS composite membranes were prepared by self-assembly method. The separation performance of dye and divalent salt of the prepared composite membrane was studied and the effect of the addition amount and layers of LDH/LDH-PSS on the membrane separation performance was further investigated. The rejection of monovalent salt, divalent salt and reactive black 5 and the pure water permeability of the composite membrane were analyzed to study the separation performance of the composite membrane. The results show that the pure water permeability of the composite membrane decreases as the number of hydrotalcite and modified hydrotalcite layers increases, the pure water flux of the membrane is 14.5 L/(m2·h·bar), the rejection rate of the membrane to reactive dye reaches over 96.7%, and the rejection of divalent inorganic salt magnesium sulfate is below 20%. |
Funds: |
国家自然科学基金项目(U1704139) |
AuthorIntro: |
田陈(1994-03-14),男,河南商丘人,硕士研究生,从事膜分离技术的研究。 E-mail:1690899743@qq.com。 |
Reference: |
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