US EPA

5101655 

Journal Article 

Metal-organic framework DUT-67 (Zr) for adsorptive removal of trace Hg2+ and CH3Hg+ in water 

Chen, Sha; Feng, Fan; Li, S; Li, X; Shu, Lun 

2018 

No 

Chemical Speciation and Bioavailability
ISSN: 0954-2299 

Taylor and Francis Ltd. 

ABINGDON 

30 

1 

99-106 

English 

10.1080/09542299.2018.1509020 

WOS:000451991000001 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052129554&doi=10.1080%2f09542299.2018.1509020&partnerID=40&md5=e4c75ed6a0c9145dfc3a79626ecc61fe
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A Zr-based stable metal-organic frameworks DUT-67 (Zr) was successfully synthesized as an adsorbent to remove trace mercury and methylmercury ions in aqueous solution. The removal efficiency of 90% and 55% of Hg2+ and CH3Hg+ was respectively achieved at pH 6 and 55 degrees C. The S in thiophene has a relatively weak adsorption capacity for mercury and there could be the slight n-complexation between thiophere ring of DUT-67 (Zr) and Hg2+ besides physical absorption, while there only was physical adsorption between DUT-67 (Zr) and CH3Hg+. The developed methods were applied to remove trace Hg2+ and CH3Hg+ in the real water samples, and the removal efficiency was from 69% to 90% and from 30% to 77% respectively; when the concentrations of Hg2+ was lower than 20 mu g L-1 in the samples, the remaining mercury concentration was lower than 1 mu g L-1, which can meet the standard of the World Health Organization. 

Metal organic framework; mercury ions; methylmercury ions; adsorption 

CHEMICAL SPECIATION AND BIOAVAILABILITY