@article {MA2021124190,
	title = {Facile synthesis of sulfhydryl modified covalent organic frameworks for high efficient Hg(II) removal from water},
	journal = {Journal of Hazardous Materials},
	volume = {405},
	year = {2021},
	pages = {124190},
	abstract = {In present study, we fabricated sulfhydryl modified covalent organic frameworks (COF--SH) through one-step reaction for the removal of Hg(II) from water. Different techniques were employed to characterize the fabricated COFs. We find that COF--SH exhibits great adsorption capacity (1283 mg/g) towards Hg(II), which is over 25 times higher than that of COF-1 without -{\textendash}SH (53.1 mg/g). COF-SH has fast adsorption kinetics with the removal of 95\% of 1000 μg/L Hg(II) within 30 min and over 99\% after 2 h. Under a wide pH range (from 4 to 9), COF--SH exhibits high removal efficiencies (\>99\%). Moreover, COF-SH can selectively adsorb Hg(II) in the presence of other metal cations up to 1000 μg/L. X-ray photoelectron spectroscopy analysis reveals the presence of high affinity between thiol-S atom and Hg(II), which is also responsible for the high selectivity towards Hg(II) compared with other cations. Because of the transfer from enol form to keto form during synthesis, COF-SH exhibit remarkable stability during 10-cycle regeneration and reuse test. During utilization in wastewater extracted from Hg contaminated sludge, COF--SH displays high Hg(II) removal efficiency (\>95\%) under multiple coexisting ions conditions. The results suggest that COF--SH have great potential for Hg(II) removal from water under complex conditions.},
	keywords = {Adsorption, Covalent organic frameworks, Heavy metal removal, mercury, Reusability, Wastewater treatment},
	issn = {0304-3894},
	doi = {http://doi.org/10.1016/j.jhazmat.2020.124190},
	url = {http://www.sciencedirect.com/science/article/pii/S0304389420321804},
	author = {Zhiyao Ma and Fuyang Liu and Nengsheng Liu and Liu, Wen and Meiping Tong}
}