期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 52, 期 10, 页码 5884-5891出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.7b06706
关键词
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资金
- Natural Science Funds for Distinguished Young Scholar of Jiangsu Province [BK20170023]
- National Natural Science Foundation of China [51675360, 51675502, 51775105, 51775001, 51775530, 51775051]
- Fundamental Research Funds for the Central Universities [3202006301, 3202006403]
- Qing Lan Project of Jiangsu Province
- International Foundation for Science, Stockholm, Sweden
- Organization for the Prohibition of Chemical Weapons, The Hague, Netherlands [F/4736-2]
- Top 6 High-Level Talents Program of Jiangsu Province [2017-GDZB-006]
- Natural Science Foundation of Jiangsu Province [BK20150505]
- Tribology Science Fund of State Key Laboratory of Tribology [SKLTKF15A11]
- Open Research Fund of State Key Laboratory of High Performance Complex Manufacturing, Central South University [Kfkt2016-11]
- Open Research Fund of State Key Laboratory of Fire Science [HZ2017-KF05]
- Open Research Fund of State Key Laboratory of solid lubrication [LSL-1607]
Developing novel methods for the removal of heavy-metal ions from wastewater with low costs, special selectivity and high efficiency is quite important in water restoration and comprehensive ecological improvement. In this work, a nanopore-based strategy was suggested and related segregation apparatus was built to separate multiple heavy-metal ions in water by selective complexation. The results indicated that the prioritization of the selecting order for the complexing agent (thiacalix[4]arene-p-tetrasulfonate (TCAS)) to heavy-metal ions was Cu(II) > Cd(II) > Pb(II) > Ba(II). Meanwhile, higher driven voltage corresponded to a faster separation speed, while it could cause the decomposition of complexed heavy-metal ions when excessed the threshold. On the other hand, pH value would affect the hydrolysis of heavy-metal ions, the complexation of the calixarene to the heavy-metal ions and the speed of the electroosmotic flow. In our experiments, the maximum separation efficiency was achieved when the driven voltage was 1.5 V and the pH value was 5.0, corresponding to the best separation rate of 94.8%, 95.2%, 92.8%, 93.6%, for Cu(II), Cd(II), Pb(II) and Ba(II), respectively.
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