NDLI: Enhanced Reduction of p-Nitrophenol by a Methanogenic Consortium Promoted by Metallic Nanoparticles

Content Provider	Springer Nature Link
Author	Cervantes, Francisco J. Rodríguez López, José Luis Peña Martínez, Mariana Ascacio Valdes, Juan A. Aguilar, Cristobal N. Bahena, Daniel
Copyright Year	2016
Abstract	The present study reports the synthesis and characterization of metallic nanoparticles (NPs) of Pd and bimetallic alloys of PdCu NPs for their application as catalysts to achieve the microbial reduction of p-nitrophenol (PNP). Addition of bimetallic alloys of PdCu NPs to methanogenic sludge incubations increased up to threefold the rate of reduction of PNP. Moreover, their presence promoted a more efficient and selective reduction of PNP to the desired product (p-aminophenol) with negligible accumulation of toxic intermediates (p-nitroso-phenol and p-hydroxylamine-phenol), which prevailed in sludge incubations lacking nanocatalysts. PdCu NPs synthesized by adding precursors H$_{2}$PdCl$_{4}$ and H$_{2}$CuCl$_{4}$ independently and simultaneously to the synthesis vessel showed superior catalytic properties as compared to those produced by mixing the same precursors prior addition to the synthesis vessel. The enhanced catalytic properties of bimetallic NPs could be explained by higher physical stability and interfacial arrangement within PdCu alloys promoting a more efficient transfer of reducing equivalents derived from lactate/ethanol fermentation towards the target nitro group in PNP. A wastewater treatment technology, combining the microbial activity of methanogenic consortia and the catalytic activity of bimetallic NPs, is proposed as an alternative for the removal of recalcitrant pollutants from wastewaters.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	227
Issue Number	10
e-ISSN	15732932
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-09-05
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Methanogenic sludge Nanocatalysts Recalcitrant pollutants Wastewater Environment Water Quality/Water Pollution Atmospheric Protection/Air Quality Control/Air Pollution Soil Science & Conservation Hydrogeology Climate Change/Climate Change Impacts
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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