首页|Rapid and efficient reduction of chromate by novel Pd/Fe@biomass derived from Enterococcus faecalis

Rapid and efficient reduction of chromate by novel Pd/Fe@biomass derived from Enterococcus faecalis

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  • NETL
  • NSTL
  • Elsevier
Efficient reduction of chromate is highly desirable for its detoxification and remediation of the contaminated environment. This study described a fusion of the concepts of precious metal biorecovery and fabrication of Pd/ Fe@biomass derived from simulated wastewater. The effectiveness of Pd/Fe@biomass during reduction process of Cr(Ⅵ) was evaluated by comparing with pure nZVI, E. faecalis and Pd@biomass. Results showed that Pd(Ⅱ) could be recovered by E. faecalis with Fe(Ⅱ) as the electron donor, and precipitation could yield nZVI anchored onto Pd-loaded E. faecalis. The nano particles (NPs) on Pd/Fe@biomass were well-dispersed, which provided 2.70 folds specific surface area comparing with nZVI. Efficient Cr(Ⅵ) reduction could be achieved at a higher catalyst dosage, the most appropriated Pd/Fe molar ratio of 2% and a wide pH range. Typically, 0.5 mM Cr(Ⅵ) could be completely reduced in 5 min driven by Pd/Fe@biomass under the conditions of dosage of 1.0 g/L and pH 3. Moreover, the mechanisms of Cr(Ⅵ) reduction by Pd/Fe@biomass were proposed, which intimately related to nZVI electron donating capacities, Pd catalysis for hydrogenation and galvanic cell effects between Fe and Pd. Therefore, Pd/Fe@biomass could be an alternative for rapid and complete reduction of Cr(Ⅵ).

Pd/Fe@biomassCr (Ⅵ)ReductionBiorecoveryE. faecalisZero valent iron

Xiaorong Wei、Nengwu Zhu、Junlin Huang、Naixin Kang、Fei Li、Pingxiao Wu、Zhi Dang

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School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China

School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China,The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China,Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, PR China,Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou, 510006, PR China

School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China,The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China

2022

10.1016/j.envres.2021.112005

Environmental research

Environmental research

EISCI
ISSN：0013-9351
年,卷(期)：2022.204(Pt.1)
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