Abstract:
The recycling of heavy metals from solid wastes and transforming these metals into useful
materials such as metal oxides nanocomposites and metal−organic frameworks (MOFs) are
beneficial for both sustainable development and environmental protection. MOFs are promising
for adsorptive desulfurization, owing to their extremely high surface areas and tunable structures.
In this paper, for the first time, MIL-53(Cr) was successfully fabricated from electroplating
sludge (EPS) as a metal source through a facile hydrothermal method with and without HF. Our
synthetic method is novel, green, scalable, and time-efficient. The obtained MIL-53(Cr) was
employed as an adsorbent for adsorptive dibenzothiophene removal from liquid fuel. MIL-53(Cr)
with HF exhibits a higher desulfurization capacity (40.11 mg g−1
) than that of MIL-53(Cr)
without HF (32.80 mg g−1
). The improved adsorption performance of MIL-53(Cr) with HF is
attributed to adding a small amount of HF, which produces highly crystalline and relativity pure
MIL-53(Cr) microrods with a high surface area and porosity and is due to a robust metal−sulfur
interaction. Furthermore, the regenerated adsorbent can retain 94% of its initial sulfur adsorption
capability even after 5 cycles, implying that MIL-53(Cr) prepared from Cr-EPS is an efficient
adsorbent for fuel desulfurization. This study provides new insight for the production of high value-added MOF materials from solid wastes following the principle of “resource reuse”.
Description:
ACS Sustainable Chem. Eng. 2020, 8, 12443−12452
DOI: https://doi.org/10.1021/acssuschemeng.0c03110
Download Link: https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.0c03110