期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 641, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.128557
关键词
Adsorption; Oil-water separation; MWCNT-COOH; Electrospinning nanofiber membrane
资金
- National Natural Science Foundation of China [51262027, 21861034]
- Science and Technology Project Gansu Province, China [20YF3GA022]
- Natural Science Foundation of Gansu Province, China [18JR3RA094]
In this study, PAN/PEI/MWCNT-COOH composite nanofiber membranes with superhydrophobicity and underwater superoleophobicity were successfully prepared. These membranes showed excellent adsorption capacity for heavy metal Pb2+ ions and high separation performance for oil-in-water emulsions, providing new insights for the removal of Pb2+ ions and efficient separation of oil-in-water emulsions.
Poor water quality caused by heavy metal ions and oil spillages are posing serious threats and risks to the environment and human health. Herein, PAN/PEI/MWCNT-COOH composite nanofiber membranes (CNMs) were successfully prepared by an electrospinning device, which could adsorb heavy metal Pb2+ ions and separate oil-in-water emulsions. The CNMs have superhydrophobicity and underwater superoleophobicity. In the oil -water separation experiment, the CNMs exhibited oil-in-water emulsions with excellent separation perfor-mance and high flux, the CNMs still had a high flux (800 L m(-2) h(-1)) after 5 cycle tests. In the adsorption experiment, the maximum adsorption of Pb2+ ions were reached 346 mg/g, and the adsorption followed the pseudo-second-order model and the Langmuir isotherm model. After 5 adsorption-desorption cycles, the Pb2+ ion removal efficiency of the CNMs still reached more than 70 %. Based on the above advantages, this study provides new insights into the adsorption of Pb2+ ions and the efficient separation of oil-in-water emulsions.
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