Du Laing, Gijs

Folens, Karel

Leus, Karen

Meledina, Maria

Perez, Jeffrey Paulo

Van Der Voort, Pascal

Van Tendeloo, Gustaaf

English

Ghent University Academic Bibliography

UiO-66-(SH)2: a selective, stable and regenerable adsorbent for the removal of mercury from water  Karen Leusa*, Karel Folensb, Jeffrey Paulo Pereza, b, Maria Meledinac, Gustaaf Van Tendelooc, Gijs Du Laingb and Pascal Van Der Voorta aDepartment of Inorganic and Physical Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Ghent University, Krijgslaan 281 (S3), 9000 Gent, Belgium, bLaboratory of Analytical Chemistry and Applied Ecochemistry, Ghent University, Coupure Links 653, 9000 Gent, Belgium, cEMAT, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerpen, Belgium  Mercury is a substance of significant environmental and human health concern. Among different methods reported to remove mercury from (waste)water, adsorption technology was found to be very promising because of its efficiency and its selectivity. Within this context, thiol functionalized adsorbents have a more pronounced affinity for mercury, even in the presence of other competing metals such as Pb2+, Cd2+, Zn2+ and Cu2+. In this study, we examined the thiol-based UiO-66 as an adsorbent for the removal of Hg2+. In general, the introduction of the SH-functionality into the framework resulted into a significant increase in the maximum adsorption capacity. Mercury was still well-removed by UiO-66-(SH)2, even at high initial concentrations, resulting in a remarkably high maximum adsorption capacity of 261.4 mg/g, which is 9 times higher than the maximum adsorption capacity of the pristine UiO-66. Even the presence of competing ions such as Na+, Ca2+, Mg2+, SO42-, Cl-, CO32-, HCO3- among others in the wastewater, did not reduce the removal efficiency of Hg2+ showing the potential of this adsorbent in the removal of mercury-contaminated wastewaters. Moreover, the UiO-66(SH)2 demonstrated a remarkable regenerability and recyclability even after 3 adsorption/desorption cycles as can be seen from Figure 1. Full Hg2+ desorption was obtained in the first 2 cycles while 89.3 % of the adsorbed Hg2+ was removed in the third cycle.       Figure 1. Three consecutive cycles of separate adsorption of 1 mg/L Hg(II), followed by desorption using UiO-66(SH)2 as an adsorbent 

UiO-66-(SH)2 : a selective, stable and regenerable adsorbent for the removal of mercury from water

https://biblio.ugent.be/publication/8523555/file/8523559.pdf

UiO-66-(SH)2 : a selective, stable and regenerable adsorbent for the removal of mercury from water

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Ghent University Academic Bibliography