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Márquez V, Fereidooni M, Santos JS, Praserthdam S, Praserthdam P. Evaluation of the hydrogenation reaction on the electrocatalytic nitrobenzene degradation over (FeCoNiCuZn) xO y high entropy oxides (HEOs). CHEMOSPHERE 2023; 341:140130. [PMID: 37690554 DOI: 10.1016/j.chemosphere.2023.140130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 09/01/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
Environmental pollution is one of the main challenges currently faced by mankind; especially industrial waste-waters treatment and remediation using energy-efficient methodologies. This research focused on the electrochemical degradation of the hazardous nitrobenzene (NB) in aqueous solutions, using novel high-entropy oxide (HEO) electrodes to elucidate the influence of the electrochemical reduction step on the degradation process. The effect of solution pH, dissolved oxygen concentration, anodic applied potential, and cell configurations on NB hydrogenation reaction were evaluated. A synergistic effect between the hydrogenation of nitrobenzene and the degradation was found to drastically enhance the conversion rates. The presence of dissolved oxygen promoted the oxidation reactions, reaching more than 90% nitrobenzene removal at 1.7 V and pH 14. The degradation of the organic by-products was attributed to the formation of the superoxide radical (O2*-) as the main oxidant species. A degradation mechanism was proposed based on the detected intermediates and the decoupling of electrochemical surface reactions observed by EIS at different solution pH.
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Affiliation(s)
- Victor Márquez
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Mohammad Fereidooni
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Janaina S Santos
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Supareak Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
| | - Piyasan Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; CAT-REAC Industrial Center, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
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Wan H, Islam MS, Tarannum T, Shi K, Mills R, Yi Z, Fang F, Lei L, Li S, Ormsbee L, Xu Z, Bhattacharyya D. Reactive membranes for groundwater remediation of chlorinated aliphatic hydrocarbons: competitive dechlorination and cost aspects. Sep Purif Technol 2023; 320:123955. [PMID: 38303990 PMCID: PMC10830166 DOI: 10.1016/j.seppur.2023.123955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
A nanocomposite membrane incorporating reactive Pd-Fe nanoparticles (NPs) was developed to remediate chlorinated aliphatic hydrocarbons (CAHs) from groundwater. Other than recapturing the produced Fen+ for in-situ regeneration, the functionalized polyanions prevented NPs agglomeration and resulting in a spherical Fe0 core (55 nm, O/Fe = 0.05) and an oxidized shell (4 nm, O/Fe = 1.38). The reactive membranes degraded 92% of target CAHs with a residence time of 1.7 seconds. After long-term treatment and regeneration, reusability was confirmed through recovered reactivity, recurrence of Fe0 in X-ray photoelectron spectroscopy, and >96% remaining of Fe and Pd. The total cost (adjusted present value for 20 years) was estimated to be 13.9% lower than the granular activated carbon system, following an EPA work breakdown structure-based cost model. However, non-target CAHs from groundwater can compete for active sites, leading to decreased surface-area normalized dechlorination rate ( k sa ) by 28.2-79.9%. A hybrid nanofiltration (NF)/reactive membrane was proposed to selectively intercept larger competitors, leading to 54% increased dechlorination efficiency and 1.3 to 1.9-fold enlarged k sa . Overall, the practical viability of the developed reactive membranes was demonstrated by the stability, reusability, and cost advantages, while the optional NF strategy could alleviate competitive degradation towards complex water chemistry.
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Affiliation(s)
- Hongyi Wan
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Md. Saiful Islam
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Tahiya Tarannum
- Department of Civil Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Ke Shi
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Rollie Mills
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Zhiyuan Yi
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Fumohan Fang
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Linfeng Lei
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Siyao Li
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Zhi Xu
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
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Ndlovu LN, Malatjie KI, Donga C, Mishra AK, Nxumalo EN, Mishra SB. Catalytic degradation of methyl orange using beta cyclodextrin modified polyvinylidene fluoride mixed matrix membranes imbedded with in‐situ generated palladium nanoparticles. J Appl Polym Sci 2022. [DOI: 10.1002/app.53270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lloyd N. Ndlovu
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Kgolofelo I. Malatjie
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Cabangani Donga
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Ajay K. Mishra
- College of Pharmaceutical and Chemical Engineering Hebei University of Science and Technology Shijiazhuang China
- Academy of Nanotechnology and Wastewater Innovations Johannesburg South Africa
- Department of Chemistry Durban University of Technology Durban South Africa
| | - Edward N. Nxumalo
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Shivani B. Mishra
- College of Pharmaceutical and Chemical Engineering Hebei University of Science and Technology Shijiazhuang China
- Academy of Nanotechnology and Wastewater Innovations Johannesburg South Africa
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Li Y, Ding Y, Wei H, Li S. Flocculating microscale zero-valent iron (mZVI) improves its hydrodynamic properties for wastewater treatment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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