@article{78992a65f1a9470b830273a3e1e8b780,
title = "A synergistic platform enables co-oxidation of halogenated organic pollutants without input of organic primary substrate",
abstract = "While co-oxidation is widely used to biodegrade halogenated organic pollutants (HOPs), a considerable amount of organic primary substrate is required. Adding organic primary substrates increases the operating cost and also leads to extra carbon dioxide release. In this study, we evaluated a two-stage Reduction and Oxidation Synergistic Platform (ROSP), which integrated catalytic reductive dehalogenation with biological co-oxidation for HOPs removal. The ROSP was a combination of an H2-based membrane catalytic-film reactor (H2−MCfR) and an O2-based membrane biofilm reactor (O2−MBfR). 4-chlorophenol (4-CP) was used as a model HOP to evaluate the performance of ROSP. In the MCfR stage, zero-valent palladium nanoparticles (Pd0NPs) catalyzed reductive hydrodechlorination that converted 4-CP to phenol, with a conversion yield over 92%. In the MBfR stage, the phenol was oxidized and used as a primary substrate that supported the co-oxidation of residual 4-CP. Genomic DNA sequencing revealed that phenol produced from 4-CP reduction enriched bacteria having genes for functional enzymes for phenol biodegradation in the biofilm community. In the ROSP, over 99% of 60 mg/L 4-CP was removed and mineralized during continuous operation: Effluent 4-CP and chemical oxygen demand concentrations were below 0.1 and 3 mg/L, respectively. H2 was the only added electron donor to the ROSP, which means no extra carbon dioxide was produced by primary-substrate oxidation.",
keywords = "Biofilm, Catalytic dechlorination, Co-oxidation, Synergistic platform",
author = "Luo, {Yi Hao} and Xiangxing Long and Yuhang Cai and Zheng, {Chen Wei} and Roldan, {Manuel A.} and Shize Yang and Dandan Zhou and Chen Zhou and Rittmann, {Bruce E.}",
note = "Funding Information: This work was supported by U.S. Department of Defense (DOD) Strategic Environmental Research and Development Program (SERDP) (ER-2721), the National Science Foundation (EEC-1449500) Nanosystems Engineering Research Center on Nanotechnology-Enabled Water Treatment, the Nanotechnology Collaborative Infrastructure Southwest (NNCI-ECCS-1542160) and the generous donations from the Swette Family Endowment, and ASU's Fulton Chair of Environmental Engineering. Dandan Zhou also gratefully acknowledges the financial support from China Scholarship Council. We gratefully acknowledge the sample fixation for imaging supervised by Mr. David Lowry in the School of Life Science, and use of facilities within the Eyring Materials Center, both at Arizona State University. We acknowledge resources and support from the Biodesign Institute core facilities at Arizona State University. We would like to acknowledge Sr. Kristina Buss from the Biodesign Institute core facilities at Arizona State University for bioinformatic analysis of the sequencing results. Funding Information: This work was supported by U.S. Department of Defense (DOD) Strategic Environmental Research and Development Program (SERDP) (ER-2721), the National Science Foundation (EEC-1449500) Nanosystems Engineering Research Center on Nanotechnology-Enabled Water Treatment, the Nanotechnology Collaborative Infrastructure Southwest (NNCI-ECCS-1542160) and the generous donations from the Swette Family Endowment, and ASU's Fulton Chair of Environmental Engineering. Dandan Zhou also gratefully acknowledges the financial support from China Scholarship Council . Publisher Copyright: {\textcopyright} 2023",
year = "2023",
month = may,
day = "1",
doi = "10.1016/j.watres.2023.119801",
language = "English (US)",
volume = "234",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier Limited",
}