The construction of a palladium-hydrogen accelerated catalytic Fenton system enhanced by UiO-66(Zr)

A novel improved Fenton system named MHACF-UiO-66(Zr) was constructed under normal temperature and pressure based on the reduction of Fe III accelerated by hydrogen. The regeneration of Fe II was enhanced by Pd/UiO-66(Zr). The hydroxyl radical could be continuously generated using only trace level F...

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Bibliographic Details
Published in:New journal of chemistry 2022-02, Vol.46 (6), p.2653-2661
Main Authors: Jin, Long, Liu, Feng, Wu, Jian-hua, Ma, San-Jian, Li, Juan-Hong, Tian, Yong-Jing, Liu, Xin, Lin, Zi-Xia
Format: Article
Language:English
Subjects:
Chlorophenol
Hydrogen peroxide
Hydroxyl radicals
Initial conditions
Palladium
Regeneration
Sludge
Zirconium
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Summary:A novel improved Fenton system named MHACF-UiO-66(Zr) was constructed under normal temperature and pressure based on the reduction of Fe III accelerated by hydrogen. The regeneration of Fe II was enhanced by Pd/UiO-66(Zr). The hydroxyl radical could be continuously generated using only trace level Fe II . 10 mg L −1 4-chlorophenol could be thoroughly degraded in the initial conditions of 75 mL min −1 H 2 , pH 3, 20 mM H 2 O 2 , 2 g L −1 Pd/UiO-66(Zr) and 20 μM Fe II . Moreover, the removal efficiency of 15 mg L −1 sulfamethazine could be maintained at least more than 94% under the same conditions. The activity of the solid catalyst could be maintained after 6 consecutive reaction cycles. This provides new insight for improving the inherent shortcomings of the Fenton reaction, which generates large amounts of iron sludge. The introduction of H 2 and Pd/UiO-66(Zr) accelerated the Fe II /Fe III cycle and led to higher contaminant degradation using only a trace level of Fe II in several reaction cycles.
ISSN:1144-0546
1369-9261
DOI:10.1039/d1nj04550d