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Ren X, Fu H, Peng D, Shen M, Tang P, Song K, Lai B, Pan Z. Intensive Treatment of Organic Wastewater by Three-Dimensional Electrode System within Mn-Loaded Steel Slag as Catalytic Particle Electrodes. Molecules 2024; 29:952. [PMID: 38474463 DOI: 10.3390/molecules29050952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 03/14/2024] Open
Abstract
Developing a green, low-carbon, and circular economic system is the key to achieving carbon neutrality. This study investigated the organics removal efficiency in a three-dimensional electrode reactor (3DER) constructed from repurposed industrial solid waste, i.e., Mn-loaded steel slag, as the catalytic particle electrodes (CPE). The CPE, a micron-grade material consisting primarily of transition metals, including Fe and Mn, exhibited excellent electric conductivity, catalytic ability, and recyclability. High rhodamine B (RhB) removal efficiency in the 3DER was observed through a physical modelling experiment. The optimal operating condition was determined through a single-factor experiment in which 5.0 g·L-1 CPE and 3 mM peroxymonosulfate (PMS) were added to a 200 mL solution of 10 mM RhB under a current intensity of 0.5 A and a 1.5 to 2.0 cm distance between the 2D electrodes. When the initial pH value of the simulated solution was 3 to 9, the RhB removal rate exceeded 96% after 20 min reaction. In addition, the main reactive oxidation species in the 3DER were determined. The results illustrated that HO• and SO4•- both existed, but that the contribution of SO4•- to RhB removal was much lower than that of HO• in the 3DER. In summary, this research provides information on the potential of the 3DER for removing refractory organics from water.
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Affiliation(s)
- Xu Ren
- School of Architecture and Civil Engineering, Chengdu University, No. 2025, Chengluo Road, Chengdu 610106, China
- Postdoctoral Research Station in Environmental Science and Engineering, Sichuan University, No. 24, South Section of First Ring Road, Chengdu 610065, China
- Postdoctoral Research Station of Haitian Water Group Co., Ltd., AVIC International Exchange Center, North Section of Yizhou Avenue, Chengdu 610041, China
| | - Haifeng Fu
- School of Architecture and Civil Engineering, Chengdu University, No. 2025, Chengluo Road, Chengdu 610106, China
| | - Danni Peng
- School of Architecture and Civil Engineering, Chengdu University, No. 2025, Chengluo Road, Chengdu 610106, China
| | - Meng Shen
- School of Architecture and Civil Engineering, Chengdu University, No. 2025, Chengluo Road, Chengdu 610106, China
| | - Peixin Tang
- Postdoctoral Research Station of Haitian Water Group Co., Ltd., AVIC International Exchange Center, North Section of Yizhou Avenue, Chengdu 610041, China
| | - Kai Song
- School of Architecture and Civil Engineering, Chengdu University, No. 2025, Chengluo Road, Chengdu 610106, China
- School of Energy and Power Engineering, Xihua University, No. 9999, Hongguang Avenue, Chengdu 610039, China
| | - Bo Lai
- Postdoctoral Research Station in Environmental Science and Engineering, Sichuan University, No. 24, South Section of First Ring Road, Chengdu 610065, China
| | - Zhicheng Pan
- Postdoctoral Research Station of Haitian Water Group Co., Ltd., AVIC International Exchange Center, North Section of Yizhou Avenue, Chengdu 610041, China
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