Removal of COD from Secondary Effluent Using Fenton Iron Sludge-Based Biochar/Fe(VI)/H2O2 Process
Source abstract
Abstract
The conventional Fenton process generates large amounts of Fenton sludge during wastewater treatment. Achieving effective utilization of Fenton sludge and reducing its production remain pivotal challenges. In this study, Fenton sludge biochar catalysts (Cat) were prepared using Fenton sludge via pyrolysis. In addition, chemical oxygen demand (COD) from secondary effluent was removed by Fenton sludge biochar catalysts activated with H2O2/Fe(VI). Specifically, the removal efficiency of COD could reach 46.2% in the Cat−2/H2O2/Fe(VI) system under weakly alkaline conditions. The mechanistic analysis confirmed that high-valent iron, •OH, O2•−, and 1O2 all participate in the degradation process. Furthermore, a continuous-flow reactor was applied to treat secondary effluent, with COD decreasing from 65 mg/L to 36 mg/L. This study provides new insights into the resource utilization of Fenton sludge and the treatment of complex wastewater.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Environmental remediation with nanomaterials · Advanced oxidation water treatment · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China
Funding
Young Scientific and Technological Talents (Level Two) in Tianjin · Tianjin Natural Science Foundation · Climbing Program of Tianjin University · National Key R&D Program
References (25)
Show source-provided references
1. Study of Sorption Processes and FT-IR Analysis of Arsenate Sorbed onto Red Muds (a Bauxite Ore Processing Waste)10.1016/j.jhazmat.2009.09.145 ↗
2. Iron Recovery from the Leached Solution of Red Mud through the Application of Oxalic Acid10.1016/j.minpro.2016.11.001 ↗
3. Evaluation of Red Mud as a Polymetallic Source—A Review10.1016/j.mineng.2021.107084 ↗
4. Novel Applications of Red Mud as Coagulant, Adsorbent and Catalyst for Environmentally Benign Processes10.1016/j.chemosphere.2008.05.013 ↗
5. Application of Common Industrial Solid Waste in Water Treatment: A Review10.1007/s11356-023-30142-2 ↗
6. Reuse of a Treated Red Mud Bauxite Waste: Studies on Environmental Compatibility10.1016/j.jhazmat.2004.09.010 ↗
7. Advanced Oxidation Processes for Organic Contaminant Destruction Based on the Fenton Reaction and Related Chemistry10.1080/10643380500326564 ↗
8. A Review of Classic Fenton’s Peroxidation as an Advanced Oxidation Technique10.1016/S0304-3894(02)00282-0 ↗
9. A Review on Fenton and Improvements to the Fenton Process for Wastewater Treatment10.1016/j.jece.2013.10.011 ↗
10. Heterogeneous Catalytic Treatment of Synthetic Dyes in Aqueous Media Using Fenton and Photo-Assisted Fenton Process10.1016/j.desal.2010.11.002 ↗
11. An Overview of the Application of Fenton Oxidation to Industrial Wastewaters Treatment10.1002/jctb.1988 ↗
12. Activation of Peroxymonosulfate by Food Waste Digestate Derived Biochar for Sulfamethoxazole Degradation: Performance and Mechanism10.1016/j.seppur.2023.124935 ↗
13. Highly Efficient Adsorption and Catalytic Degradation of Ciprofloxacin by a Novel Heterogeneous Fenton Catalyst of Hexapod-like Pyrite Nanosheets Mineral Clusters10.1016/j.apcatb.2021.120734 ↗
14. Reuse of Fenton Sludge as an Iron Source for NiFe2O4 Synthesis and Its Application in the Fenton-Based Process10.1016/j.jes.2016.05.010 ↗
15. Assessing the Use of Probes and Quenchers for Understanding the Reactive Species in Advanced Oxidation Processes10.1021/acs.est.2c09338 ↗
16. Effects of Ce Doping on the Fenton-like Reactivity of Cu-Based Catalyst to the Fluconazole10.1016/j.cej.2020.124897 ↗
17. Disposal of Fenton Sludge with Anaerobic Digestion and the Roles of Humic Acids Involved in Fenton Sludge10.1016/j.watres.2019.114900 ↗
18. Fenton-like Catalysis by MnO2 Membrane Reactor with Oxygen Vacancies for Carbamazepine Degradation10.1016/j.apcatb.2024.124106 ↗
19. Iron Cobalt and Nitrogen Co-Doped Carbonized Wood Sponge for Peroxymonosulfate Activation: Performance and Internal Temperature-Dependent Mechanism10.1016/j.jcis.2022.03.141 ↗
20. Ultrasound-Assisted Heterogeneous Fenton-like Process for Methylene Blue Removal Using Magnetic MnFe2O4/Biochar Nanocomposite10.1016/j.apsusc.2021.150654 ↗
21. Defective Nitrogen Doped Carbon Material Derived from Nano-ZIF-8 for Enhanced in-Situ H2O2 Generation and Tetracycline Hydrochloride Degradation in Electro-Fenton System10.1016/j.envres.2024.118644 ↗
22. Enhanced Catalytic Performance of CuFeS2 Chalcogenide Prepared by Microwave-Assisted Route for Photo-Fenton Oxidation of Emerging Pollutant in Water10.1016/j.jece.2020.104077 ↗
23. Sulfur-Functionalized CoMn2O4 as a Fenton-like Catalyst for the Efficient Rhodamine B Degradation10.1016/j.apsusc.2023.157044 ↗
24. Molecular Engineering toward Pyrrolic N-Rich M-N4 (M = Cr, Mn, Fe, Co, Cu) Single-Atom Sites for Enhanced Heterogeneous Fenton-Like Reaction
25. Chen, S., Ran, X., Ren, G., Wei, Z., Wang, Z., Rao, T., Li, R., and Ma, X. (2022). Comparison of Fenton and Ozone Oxidation for Pretreatment of Petrochemical Wastewater: COD Removal and Biodegradability Improvement Mechanism. Separations, 9.10.3390/separations9070179 ↗